Providers - O

O'Reilly Automotive

O'Reilly Automotive is a Fortune 500 specialty retailer of automotive aftermarket parts, tools, supplies, equipment, and accessories serving both do-it-yours...

O-RAN

O-RAN supports the Open Radio Access Network architecture under the Linux Foundation for more interoperable and virtualized mobile network infrastructure. It...

Oak Ridge National Laboratory

Oak Ridge National Laboratory (ORNL) is the largest US Department of Energy science and energy laboratory. ORNL provides public data and scientific computing...

Oaktree Capital Group

Oaktree Capital Group is a global asset management firm specializing in alternative investment strategies including credit, private equity, real assets, and ...

Oapi-Codegen

oapi-codegen is an open source Go code generator that produces client and server boilerplate from OpenAPI 3.0 and 3.1 specifications with support for Echo, C...

Oasdiff

Oasdiff is an open-source tool for detecting breaking changes and generating changelogs from OpenAPI specifications.

Oasis Petroleum

Oasis Petroleum was an independent exploration and production (E&P) company focused on unconventional crude oil and natural gas resources in the Williston Ba...

OAuth

OAuth is an open authorization framework that enables third-party applications to access user resources without exposing credentials. It provides a secure, t...

Oauth2-Proxy

oauth2-proxy is an open-source reverse proxy that provides authentication with Google, Azure, OpenID Connect, and many more identity providers.

Object-Oriented Programming

Object-Oriented Programming (OOP) is a software development paradigm that organizes software design around data, or objects, rather than functions and logic....

ObjectCut

"Image Background removal"

Obsidian

Obsidian is a local-first knowledge base and note-taking app built on plain Markdown files. Obsidian itself does

Obsidian Security

Obsidian Security is a SaaS security platform providing threat detection, posture management, and compliance monitoring for cloud applications.

Occidental Petroleum

Occidental Petroleum is an international oil and gas exploration and production company with operations in the United States, Middle East, Africa, and Latin ...

Occupational Safety and Health Administration

The Occupational Safety and Health Administration (OSHA) is a US federal agency that sets and enforces standards for safe and healthful working conditions. O...

Ocean Facts

"Facts pertaining to the physical science of Oceanography"

Ocean Network Express

Ocean Network Express (ONE) is a Singapore-headquartered global container liner shipping company formed in 2017 through the integration of the container ship...

Ocean.io

Ocean.io is a B2B account-based prospecting and enrichment platform focused on lookalike search and ICP refinement. It offers a REST API for company enrichme...

Oceaneering International

Oceaneering International is a global provider of engineered services and products primarily to the offshore oil and gas industry, with a focus on deepwater ...

Ocelot

Ocelot is an open-source API Gateway built with .NET for microservices architectures. It provides routing, authentication, rate limiting, load balancing, and...

OCI

OCI (Open Container Initiative) is an open governance structure for creating open industry standards around container formats and runtimes. OCI defines stand...

OCLC

The Discovery API allows you to surface both WorldCat and WorldCat Discovery central index data in search results, including: Materials held by your library ...

OCRA

OCRA (OATH Challenge-Response Algorithm) is a standard for generating one-time passwords based on challenge-response authentication as defined in RFC 6287. I...

OctoAI

OctoAI (formerly OctoML) was a Seattle-based AI inference platform founded in 2019 as a University of Washington Allen School spin-out of the Apache TVM proj...

Octoparse

Octoparse is a powerful web scraping tool that allows users to extract data from websites without any coding knowledge. The platform uses advanced algorithms...

Octopart

"Electronic part data for manufacturing, design, and sourcing"

Octopus Deploy

Octopus Deploy is a continuous delivery and release orchestration platform for managing deployments across development, test, and production environments to ...

Octopus Energy

Octopus Energy is a UK-founded retail energy supplier and the parent of Kraken Technologies, the AI-powered energy operating system that runs both Octopus an...

OCUDU Ecosystem Foundation

The OCUDU Ecosystem Foundation is a Linux Foundation project announced at MWC Barcelona in March 2026. It is an open collaboration hub dedicated to building ...

Ocwen Financial

Ocwen Financial Corporation is a leading non-bank mortgage servicer and originator providing solutions through its primary brands PHH Mortgage and Liberty Re...

OData

OData (Open Data Protocol) is an OASIS standard that defines best practices for building and consuming RESTful APIs. It enables the creation of query-based d...

OddsJam

OddsJam's Sports Betting API offers real-time betting odds from 100+ sportsbooks including player props, alternate markets, injury data, schedules, rankings,...

Oddsmagnet

"Odds history from multiple UK bookmakers"

Odessa Technologies

Odessa is a Philadelphia-headquartered lease and loan management software company founded in 1998 that powers asset finance for banks, captive finance compan...

Odoo

Odoo is an open-source suite of business applications covering ERP, CRM, eCommerce, accounting, inventory, and more. Odoo provides external APIs for integrat...

ODP

'Profile for ODP in the API Evangelist network. Fortune F500 (rank 446).'

ODWeather

"Weather and weather webcams"

OECD

The OECD provides programmatic access to OECD data through an application programming interface (API) based on the SDMX standard. These APIs are free of char...

OffenderList

OffenderList is a comprehensive online platform that provides information about individuals who have been convicted of criminal offenses. The website allows ...

Offenders.io

Offenders.io is a technology company that specializes in providing innovative solutions for managing and monitoring offender populations. Their platform util...

Office 365

Microsoft Office 365 is a cloud-based suite of productivity and collaboration applications that integrates all Microsoft's existing online applications into ...

Office Depot

Office Depot is a leading provider of business products and services delivering workplace solutions through retail stores, e-commerce sites, and a dedicated ...

Office of Career, Technical, and Adult Education

The Office of Career, Technical, and Adult Education is a government agency that focuses on providing resources and support to individuals seeking to further...

Office of Child Support Services

The Office of Child Support Services is a government agency that works to ensure that children receive the financial support they need from their non-custodi...

Office of Community Oriented Policing Services

The Office of Community Oriented Policing Services (COPS Office) is a component of the U.S. Department of Justice that works to advance the practice of commu...

Office of Congressional Workplace Rights

The Office of Congressional Workplace Rights is responsible for enforcing workplace rights for employees of the United States Congress. This includes oversee...

Office of Fossil Energy and Carbon Management

The Office of Fossil Energy and Carbon Management is a division of the U.S. Department of Energy that is focused on addressing the challenges of reducing gre...

Office of Government Ethics

The Office of Government Ethics (OGE) is an independent agency within the federal government that oversees the behavior and ethics of executive branch employ...

Office of Inspector General

The Office of Inspector General (OIG) conducts audits, investigations, inspections, and other reviews to promote economy and efficiency in government program...

Office of the Comptroller of the Currency

The Office of the Comptroller of the Currency (OCC) is a federal agency responsible for regulating and supervising national banks and federal savings associa...

Office of the Federal Register

The Office of the Federal Register is responsible for publishing official government documents. This includes the publication of presidential proclamations, ...

Official Ukrainian Government Portal

Official Ukrainian Government Portal is a open data portal open-data portal for Ukraine running CKAN. It exposes the CKAN catalog API, a standardized machine...

OGE Energy

OGE Energy is the parent company of Oklahoma Gas and Electric Company, a regulated electric utility serving customers in Oklahoma and western Arkansas.

Ogen

Ogen is a high-performance Go code generator that produces type-safe HTTP clients and servers from OpenAPI v3 specifications with validation, middleware, and...

Ogilvy

Ogilvy is a global advertising, marketing, and communications agency network founded by David Ogilvy in 1948 and headquartered in New York City. It is a WPP ...

Ohio National (Acquired by Constellation Insurance / Rebranded as AuguStar)

Ohio National Financial Services was a Cincinnati-based mutual life insurance and annuities provider, historically operating through Ohio National Mutual Hol...

Ohio State University

Ohio State University is a large public land-grant research university in Columbus, Ohio, United States, ranked #208 in the QS World University Rankings 2025...

OIDC

OpenID Connect (OIDC) is an identity layer built on top of OAuth 2.0 that enables clients to verify the identity of end-users based on authentication perform...

Oikolab

"70+ years of global, hourly historical and forecast weather data from NOAA and ECMWF"

Oil States International

Oil States International is a global oilfield services company that provides specialty products and services to oil and gas drilling and production companies...

OKEx

"Cryptocurrency exchange based in Seychelles"

OkHttp

OkHttp is an efficient HTTP and HTTP/2 client for Android and Java applications with connection pooling and transparent GZIP.

Oklahoma

Oklahoma is a open data portal open-data portal for United States running CKAN. It exposes the CKAN catalog API, a standardized machine-readable interface ov...

Oklo

Oklo Inc. is a Santa Clara, California advanced fission company designing and deploying small modular reactors under the Aurora powerhouse brand. The Aurora ...

Okta

Okta is the workforce identity incumbent — its Identity Cloud platform (also called the Okta Workforce

Olark

Olark is a live chat and AI-powered customer communication platform that enables businesses to engage website visitors in real time through chat, chatbots, W...

Old Dominion Freight Line

Old Dominion Freight Line is a leading less-than-truckload (LTL) motor carrier providing regional, inter-regional, and national freight services in the Unite...

Old National Bancorp

Old National Bancorp is a regional bank holding company headquartered in Indiana and a Fortune 1000 firm that provides consumer banking, commercial banking, ...

Old Republic International

Old Republic International is one of the nation's largest publicly held insurance organizations, providing general insurance, title insurance, and life and a...

Olin

Olin Corporation is a leading global manufacturer and distributor of chemical products and ammunition. Olin operates three business segments: Chlor Alkali Pr...

Olive AI

Olive AI was a Columbus, Ohio healthcare automation company founded in 2012 by Sean Lane (originally as CrossChx, rebranded to Olive in 2017). The company bu...

Ollama

API for running large language models locally.

Olo

Olo is a leading on-demand commerce platform powering the digital experience for restaurant brands, serving approximately 750+ enterprise and emerging chains...

OLX Poland

"Integrate with local sites by posting, managing adverts and communicating with OLX users"

Omnicare

Omnicare is a long-term care pharmacy services company providing pharmacy services to long-term care facilities, senior living communities, and other healthc...

Omnicom Group

Omnicom Group is a global advertising, marketing, and corporate communications holding company with hundreds of agencies serving clients in more than 100 cou...

Omnicom Group

'Fortune 1000 company Omnicom Group. Public API documentation has not yet been catalogued in the API Evangelist network.'

Omnisend

Omnisend is a Lithuanian-headquartered email and SMS marketing automation platform purpose-built for ecommerce, with first-class integrations into Shopify, B...

Onafriq

Onafriq (formerly MFS Africa) is a pan-African digital payments network headquartered in London with operating entities across Mauritius, Ghana, Nigeria, Tan...

One Map, Singapore

"Singapore Land Authority REST API services for Singapore addresses"

OneDrive

"File Sharing and Storage"

ONEiO

ONEiO is a managed integration service provider delivering IntegrationOps as a Service, providing cloud-based, automation-led integrations for enterprise IT ...

OneLogin

OneLogin is an identity and access management platform providing single sign-on (SSO), multi-factor authentication, user provisioning, and a RESTful API for ...

OneMain Holdings

OneMain Holdings is a leading provider of personal installment loans to nonprime consumers in the United States, with branches across multiple states. No pub...

ONEOK

ONEOK is a Fortune 500 energy company providing midstream services to natural gas and natural gas liquids producers, processors, and customers. This reposito...

OneSignal

OneSignal is a customer engagement platform with push notifications, in-app messaging, email, SMS, and live activities.

OneTrust

OneTrust is an enterprise privacy, security, ethics, and ESG platform. Its developer portal

OneUptime

OneUptime is an open source observability platform combining monitoring, incident management, status pages, and on-call scheduling in one OpenTelemetry-nativ...

Onfido

Onfido is a global identity verification and authentication company that helps businesses verify the identities of their customers. Using advanced technology...

Onfleet

Onfleet is an AI-powered last-mile delivery management platform that orchestrates fleet operations, dispatch, route optimization, and customer experience acr...

OnlineNIC

OnlineNIC offers a RESTful API with JSON format response for our partners to directly manage their products and orders. We intends to help our partners autom...

onsemi

ON Semiconductor (now branded as onsemi) is a global supplier of semiconductor-based solutions for power efficiency, image sensing, and signal processing in ...

Ontario Data Catalogue

Ontario Data Catalogue is a provincial government open-data portal for Canada running CKAN. It exposes the CKAN catalog API, a standardized machine-readable ...

Ontraport

Ontraport is a business automation platform combining CRM, marketing automation, email marketing, landing pages, ecommerce, and membership site capabilities ...

OnWater

"Determine if a lat/lon is on water or land"

Onyx Bazaar

"Free public leaderboard of x402 paid HTTP services indexed from Coinbase CDP discovery API"

Oomnitza

Oomnitza is an enterprise technology management platform providing IT asset lifecycle management, SaaS management, and technology workflow automation.

OPay

OPay is a Nigerian mobile money and fintech super-app operated by Blue Ridge Microfinance Bank (OPay Digital Services Limited) and majority-owned by Opera Li...

Open (open.money)

Open is one of India's leading SMB neobanks, pioneering "connected banking" - a unified business finance platform that layers payments, automated reconciliat...

Open 3D Foundation

The Open 3D Foundation is a Linux Foundation project supporting the Open 3D Engine (O3DE), an open source, real-time 3D engine for building games, simulation...

Open Brewery DB

Open Brewery DB is a comprehensive database that provides information on breweries and taprooms from around the world. It includes details such as location, ...

Open Charge Map

"Global public registry of electric vehicle charging locations"

Open Collective

"Get Open Collective data"

Open Connectivity for Tours, Activities, and Attractions

OCTO (Open Connectivity for Tours, Activities, and Attractions) is an open standard API specification for the

Open Container Initiative

The Open Container Initiative (OCI) is an open governance structure for creating open industry standards around container formats and runtimes, hosted under ...

Open Data Minneapolis

"Spatial (GIS) and non-spatial city data for Minneapolis"

Open Data NHS Scotland

"Medical reference data and statistics by Public Health Scotland"

Open Data Regione Toscana

Open Data Regione Toscana is a open data portal open-data portal for Italy running CKAN. It exposes the CKAN catalog API, a standardized machine-readable int...

Open Data Schleswig-Holstein

Open Data Schleswig-Holstein is a state government open-data portal for Germany running CKAN. It exposes the CKAN catalog API, a standardized machine-readabl...

Open Data Trentino

Open Data Trentino is a open data portal open-data portal for Italy running CKAN. It exposes the CKAN catalog API, a standardized machine-readable interface ...

Open Development Cambodia

Open Development Cambodia is a organization open-data portal for Cambodia running CKAN. It exposes the CKAN catalog API, a standardized machine-readable inte...

Open Development Mekong

Open Development Mekong is a organization open-data portal for Mekong Region running CKAN. It exposes the CKAN catalog API, a standardized machine-readable i...

Open Development Myanmar

Open Development Myanmar is a organization open-data portal for Myanmar running CKAN. It exposes the CKAN catalog API, a standardized machine-readable interf...

Open Development Vietnam

Open Development Vietnam is a organization open-data portal for Vietnam running CKAN. It exposes the CKAN catalog API, a standardized machine-readable interf...

Open Disease

"API for Current cases and more stuff about COVID-19 and Influenza"

Open Food Facts

Open Food Facts is a food products database made by everyone, for everyone. You can use it to make better food choices, and as it is open data, anyone can re...

Open Government Canada

Open Government Canada is a national government open-data portal for Canada running CKAN. It exposes the CKAN catalog API, a standardized machine-readable in...

Open Government, ACT

"Australian Capital Territory Open Data"

Open Government, Argentina

"Argentina Government Open Data"

Open Government, Australia

"Australian Government Open Data"

Open Government, Austria

"Austria Government Open Data"

Open Government, Belgium

"Belgium Government Open Data"

Open Government, Canada

"Canadian Government Open Data"

Open Government, Colombia

"Colombia Government Open Data"

Open Government, Cyprus

"Cyprus Government Open Data"

Open Government, Czech Republic

"Czech Republic Government Open Data"

Open Government, Denmark

"Denmark Government Open Data"

Open Government, Estonia

"Estonia Government Open Data"

Open Government, Finland

"Finland Government Open Data"

Open Government, France

"French Government Open Data"

Open Government, Germany

"Germany Government Open Data"

Open Government, Greece

"Greece Government Open Data"

Open Government, India

"Indian Government Open Data"

Open Government, Ireland

"Ireland Government Open Data"

Open Government, Italy

"Italy Government Open Data"

Open Government, Korea

"Korea Government Open Data"

Open Government, Lithuania

"Lithuania Government Open Data"

Open Government, Luxembourg

"Luxembourgish Government Open Data"

Open Government, Mexico

"Mexican Statistical Government Open Data"

Open Government, Mexico

"Mexico Government Open Data"

Open Government, Netherlands

"Netherlands Government Open Data"

Open Government, New South Wales

"New South Wales Government Open Data"

Open Government, New Zealand

"New Zealand Government Open Data"

Open Government, Norway

"Norwegian Government Open Data"

Open Government, Peru

"Peru Government Open Data"

Open Government, Poland

"Poland Government Open Data"

Open Government, Portugal

"Portugal Government Open Data"

Open Government, Queensland Government

"Queensland Government Open Data"

Open Government, Romania

"Romania Government Open Data"

Open Government, Saudi Arabia

"Saudi Arabia Government Open Data"

Open Government, Singapore

"Singapore Government Open Data"

Open Government, Slovakia

"Slovakia Government Open Data"

Open Government, Slovenia

"Slovenia Government Open Data"

Open Government, South Australian Government

"South Australian Government Open Data"

Open Government, Spain

"Spain Government Open Data"

Open Government, Sweden

"Sweden Government Open Data"

Open Government, Switzerland

"Switzerland Government Open Data"

Open Government, Taiwan

"Taiwan Government Open Data"

Open Government, Thailand

"Thailand Government Open Data"

Open Government, UK

"UK Government Open Data"

Open Government, USA

"United States Government Open Data"

Open Government, Victoria State Government

"Victoria State Government Open Data"

Open Government, West Australia

"West Australia Open Data"

Open Liberty

Open Liberty is a lightweight, open source Java application server from IBM for building cloud-native microservices and applications with full support for Ja...

Open Library

Open Library offers a suite of APIs to help developers get up and running with its data. This includes RESTful APIs that make Open Library data available in ...

Open Mainframe Project

The Open Mainframe Project is a Linux Foundation project encouraging the use of Linux-based operating systems and open source software on mainframe computers...

Open mHealth

Open mHealth is a nonprofit, community-driven initiative that develops open standards and open-source software for making patient-generated health data inter...

Open Movie Database

"Movie information"

Open Notify

"ISS astronauts, current location, etc"

open NRW

open NRW is a open data portal open-data portal for Germany running CKAN. It exposes the CKAN catalog API, a standardized machine-readable interface over app...

Open Page Rank

"API for calculating and comparing metrics of different websites using Page Rank algorithm"

Open Podcast API

The Open Podcast API is an initiative aiming to provide a feature-complete synchronization API specification for podcast (web) apps and user-focused servers....

Open Policy Agent

Open Policy Agent (OPA) is an open-source project that provides a flexible and powerful policy engine for cloud-native environments. OPA enables users to def...

Open Programmable Infrastructure

The Open Programmable Infrastructure (OPI) project is a Linux Foundation initiative demonstrating real-world use cases for offloading key infrastructure mana...

Open Science Framework

"Repository and archive for study designs, research materials, data, manuscripts, etc"

Open Service Mesh

Open Service Mesh (OSM) is a lightweight, extensible, cloud native service mesh built on Envoy and the Service Mesh Interface (SMI) specification. OSM provid...

Open Skills

"Job titles, skills and related jobs data"

Open Topo Data

"Elevation and ocean depth for a latitude and longitude"

Open Trivia Database

The Open Trivia Database (OpenTDB) is a free, user-contributed trivia question database operated by Pixeltail Games LLC. It offers a JSON REST API for retrie...

Open Trivia DB

The Open Trivia Database provides a completely free JSON API for use in programming projects. Use of this API does not require an API key, just generate the ...

Open Voice Network

The Open Voice Network is a Linux Foundation project advancing open standards for AI-enabled voice assistance systems. Its core initiatives around TrustMark ...

Open WebUI

Open WebUI is a self-hosted, open-source web UI for LLMs (notably Ollama and OpenAI-compatible backends). It exposes a REST API for chats, models, prompts, k...

Open-Meteo

"Global weather forecast API for non-commercial use"

openAFRICA

"Large datasets repository of African open data"

OpenAI

APIs for accessing OpenAI's artificial intelligence models including GPT, DALL-E, Whisper, and Embeddings.

OpenAI APIs

Collection of OpenAI's artificial intelligence APIs for natural language processing, image generation, speech, and embeddings including Chat Completions, Com...

OpenAlex

"Open catalog of scholarly works, authors, institutions, sources, and concepts"

OpenAPI

OpenAPI (formerly Swagger Specification) is a standard, language-agnostic specification for describing RESTful APIs in a machine-readable format. It enables ...

OpenAPI Generator

OpenAPI Generator is an open-source tool that generates client libraries, server stubs, API documentation, and configuration automatically given an OpenAPI S...

OpenAPI Initiative

The OpenAPI Initiative is a Linux Foundation project that promotes the OpenAPI Specification for defining standard, language-agnostic interfaces to RESTful A...

OpenAPI TypeScript Codegen

OpenAPI TypeScript Codegen is an open source tool that generates TypeScript API clients from OpenAPI specifications, producing lightweight, fully typed clien...

OpenAPIHub

"The All-in-one API Platform"

OpenAQ

OpenAQ is a non-profit organization that focuses on collecting and sharing air quality data from around the world. By providing access to this information th...

OpenBMC

OpenBMC is a Linux Foundation project producing an open source implementation of baseboard management controller firmware. Founded by Microsoft, Intel, IBM, ...

OpenCage

"Forward and reverse geocoding using open data"

OpenChain

OpenChain is an international standard (ISO/IEC 5230) under the Linux Foundation for open source license compliance programs. It helps organizations manage o...

OpenCorporates

"Data on corporate entities and directors in many countries"

OpenCost

An open source CNCF specification and reference implementation for real-time cost monitoring of Kubernetes infrastructure and cloud spending, enabling teams ...

openCypher

openCypher is an open-source project that provides a standardized graph query language originally developed by Neo4j for querying property graphs. It enables...

opendata.gov.je

opendata.gov.je is a open data portal open-data portal for JE running CKAN. It exposes the CKAN catalog API, a standardized machine-readable interface over a...

OpenData.HRO - Portal für offene Data der Hansestadt Rostock

OpenData.HRO - Portal für offene Data der Hansestadt Rostock is a open data portal open-data portal for Germany running CKAN. It exposes the CKAN catalog API...

opendata.swiss

opendata.swiss is a national government open-data portal for Switzerland running CKAN. It exposes the CKAN catalog API, a standardized machine-readable inter...

OpenDataNI (Northern Ireland)

OpenDataNI (Northern Ireland) is a regional government open-data portal for United Kingdom running CKAN. It exposes the CKAN catalog API, a standardized mach...

Opendoor

Opendoor is an iBuyer that lets U.S. homeowners request a near-instant cash offer on their home, sell directly to Opendoor, list with Opendoor through its ag...

Opendoor Technologies

'Profile for Opendoor Technologies in the API Evangelist network. Fortune F500 (rank 266).'

OpenEBS

OpenEBS is a popular and widely deployed open source Container Native Storage platform for stateful persistent applications on Kubernetes. It provides dynami...

OpenEvidence

OpenEvidence is a clinical decision-support search platform that uses generative AI

OpenF1

OpenF1 is a free and open-source API providing real-time and historical Formula 1 data including car telemetry, lap timings, race control messages, weather, ...

openFDA

openFDA is the U.S. Food and Drug Administration's public data platform, providing Elasticsearch-backed REST APIs serving FDA-administered data on drugs, med...

OpenFeature

OpenFeature is a CNCF incubating open specification for feature flag management. It provides a vendor-agnostic

OpenFEC

The Federal Election Commission (FEC) API is a RESTful web service supporting full-text and field-specific searches on FEC data. Bulk downloads are available...

OpenFGA

OpenFGA is a CNCF incubating high-performance authorization system implementing fine-grained access control based on the Zanzibar model. It provides a flexib...

OpenFIGI

OpenFIGI is your entry point to multiple tools for identifying, mapping and requesting a free Financial Instrument Global Identifier (FIGI). OpenFIGI is an o...

OpenGraphr

"Really simple API to retrieve Open Graph data from an URL"

OpenHands

OpenHands (by All Hands AI, formerly OpenDevin) is an open-source autonomous coding agent platform. Ships as a Python Agent SDK, CLI, local GUI with a REST A...

OpenID Connect

OpenID Connect (OIDC) is an identity authentication protocol that is an extension of OAuth 2.0. It enables clients to verify the identity of end-users and ob...

openIDL

openIDL (Open Insurance Data Link) is a Linux Foundation project developing standardized, interoperable data frameworks for the insurance industry. It uses b...

OpenInfra Foundation

The OpenInfra Foundation, which recently joined the Linux Foundation, is home to open infrastructure projects including OpenStack, Kata Containers, StarlingX...

OpenJS Foundation

The OpenJS Foundation is a Linux Foundation project that supports the growth of JavaScript and web technologies through open governance and collaboration. It...

OpenKruise

OpenKruise is a CNCF incubating project providing advanced workload management and deployment automation for Kubernetes. It extends Kubernetes with enhanced ...

OpenLaws

OpenLaws is a Public Benefit Corporation that provides programmatic access to U.S. law text — federal and state statutes, regulations, constitutions, and cas...

OpenLDAP

OpenLDAP is an open source implementation of the Lightweight Directory Access Protocol (LDAP) that provides directory server daemons, client libraries, and u...

OpenLigaDB

"Crowd sourced sports league results"

OpenLLMetry

OpenLLMetry is an open-source observability framework for LLM and generative AI applications, built

OpenMenu

OpenMenu provides structured menu data and menu publishing for restaurants, built on the open OpenMenu Format specification. Its public REST API helps develo...

OpenMercantil

OpenMercantil is an independent public-data API for Spanish company intelligence. It indexes the Boletin Oficial del Registro Mercantil (BORME) and cross-ref...

OpenObserve

OpenObserve is an open source petabyte-scale observability platform with unified logs, metrics, traces, and front-end telemetry in a single UI with SQL and P...

OpenPanel

OpenPanel is an open source product analytics platform that provides event tracking, user journey analysis, real-time dashboards, and funnel analysis, offeri...

OpenPipe

OpenPipe is a fine-tuning and inference platform for distilling expensive frontier-LLM workloads into smaller, cheaper specialized models. Captures productio...

Openprise

Free your RevOps teams from the complexities of bad data and give them data they can trust, take action on, and make better decisions with. A simple way to a...

OpenProject

OpenProject is an open source project management platform offering work package tracking, Gantt charts, agile boards, time tracking, BIM, and enterprise proj...

Openprovider

Openprovider is a wholesaler of Internet services and products with a unique platform from which you can find and manage all the products you need: domains, ...

OpenRegistry

"Real-time queries to 27 national company registries (UK, FR, DE, IT, ES, KR + 21 more)"

OpenReplay

OpenReplay is an open source session replay and product analytics platform that helps developers debug web applications by recording and replaying user sessi...

OpenRouter

OpenRouter is an API platform that provides unified access to multiple AI language models through a single interface. OpenRouter acts as a "router" or gatewa...

openrouteservice.org

"Directions, POIs, isochrones, geocoding (+reverse), elevation, and more"

OpenSanctions

"Data on international sanctions, crime and politically exposed persons"

OpenSearch

OpenSearch is the open source, community-driven search, analytics, and observability suite (forked from Elasticsearch and Kibana) maintained under the Linux ...

openSenseMap

"Data from Personal Weather Stations called senseBoxes"

OpenShift

A comprehensive API definition for Red Hat OpenShift, the enterprise Kubernetes platform.

OpenSky Network

"Free real-time ADS-B aviation data"

OpenSpace

OpenSpace is a visual intelligence platform for the construction industry, headquartered at 333 Kearny Street, San Francisco, California. The company pairs a...

OpenSSF

The Open Source Security Foundation (OpenSSF) is a collaborative initiative under the Linux Foundation dedicated to improving the security of open source sof...

OpenStack

Open source cloud computing platform for building and managing public and private clouds, providing infrastructure as a service (IaaS) through a set of inter...

OpenStreetMap

OpenStreetMap (OSM) is a collaborative project to create a free, editable map of the world. The OSM ecosystem exposes a family of public REST APIs: the main ...

OpenTable

OpenTable is a global restaurant reservation platform owned by Booking Holdings. The OpenTable

OpenTelemetry

Vendor-neutral open-source observability framework for cloud-native software, providing a collection of tools, APIs, and SDKs for instrumenting, generating, ...

OpenTofu

Open-source infrastructure as code tool forked from Terraform, providing a community-driven alternative for provisioning and managing cloud infrastructure us...

OpenTopography API

OpenTopography API is a web service that provides users with access to high-resolution topographic data and tools for analysis and visualization. The API all...

OpenUV

OpenUV provides a global real-time UV index API. The service combines meteorological inputs (ozone, cloud cover, area reflection) with NASA satellite sources...

OpenVisionAPI

"Open source computer vision API based on open source models"

OpenVPN

OpenVPN is a secure networking company providing VPN and Zero Trust network access solutions for over 20,000 organizations worldwide, offering both the self-...

OpenWallet Foundation

The OpenWallet Foundation is a Linux Foundation Europe project that brings developers and standards organizations together to facilitate global interoperabil...

OpenWeather

OpenWeather is a data platform that provides accurate and reliable weather information to individuals, businesses, and organizations around the world. They g...

OpenWeatherMap

OpenWeather (operating openweathermap.org) is a global weather data platform delivering current weather, multi-horizon forecasts, historical archives, climat...

Openwhyd

"Download curated playlists of streaming tracks (YouTube, SoundCloud, etc...)"

OpenX

OpenX is an independent supply-side platform (SSP) and programmatic ad exchange headquartered in Pasadena, California, founded in 2008. OpenX connects publis...

OpenYurt

OpenYurt is a CNCF incubating project that extends Kubernetes for edge and cloud-edge collaboration scenarios. It provides node autonomy for edge nodes to co...

Operation Support Equipment

API for managing and accessing operation support equipment data, inventory, maintenance records, and deployment information for operational logistics and equ...

Operator Framework

The Operator Framework is a CNCF incubating toolkit for building and managing Kubernetes Operators. It includes the Operator SDK for scaffolding and building...

OPNsense

OPNsense is an open source FreeBSD-based firewall and routing platform providing stateful packet filtering, VPN (IPsec, OpenVPN, WireGuard), intrusion detect...

OpsGenie

OpsGenie is an incident management and alerting platform, now part of Atlassian, that helps operations teams manage on-call schedules, route alerts, and coor...

OPSI Slovenia

OPSI Slovenia is a national government open-data portal for Slovenia running CKAN. It exposes the CKAN catalog API, a standardized machine-readable interface...

OpsLevel

OpsLevel is a prescriptive internal developer portal for cataloging, measuring, and scaffolding services according to engineering best practices.

OpsRamp

OpsRamp is an AIOps and IT operations management platform for hybrid infrastructure monitoring and management.

Opterrix

Opterrix delivers real-time and historical weather and natural hazard intelligence to inform and automate key decision-making throughout the insurance value ...

Optic

Optic is an open source tool for OpenAPI linting, diffing, and testing that helps prevent breaking changes, publish accurate documentation, and improve API d...

OpticOdds

OpticOdds Sports Betting API offers real-time betting odds for main lines, player props, alternate markets, injury data, schedules, ranking, scores and more ...

Optimism

Optimism is an Ethereum Layer 2 scaling network and the originator of the OP Stack — an open-source, modular rollup framework that powers OP Mainnet and a gr...

Optimizely

Optimizely is a digital experience platform that provides A/B testing, feature flagging, content management, and commerce solutions for enterprises. Their de...

Option Care Health

'Profile for Option Care Health in the API Evangelist network. Fortune F1000 (rank 918).'

OptScale

OptScale is an open-source FinOps and cloud cost optimization platform by Hystax supporting AWS, Azure, GCP, Alibaba Cloud, and Kubernetes.

Oracle

Collection of Oracle's APIs and developer resources across cloud infrastructure, databases, AI services, SaaS applications, and platform services.

Oracle APEX

Oracle Application Express (APEX) is a low-code development platform that enables you to build scalable, secure enterprise apps with world-class features.

Oracle Cloud Infrastructure

Collection of Oracle Cloud Infrastructure (OCI) REST APIs for managing cloud resources and services.

Oracle Container Engine for Kubernetes

Oracle Container Engine for Kubernetes (OKE) is a managed Kubernetes service that simplifies the deployment, management, and scaling of containerized applica...

Oracle Database

APIs and interfaces for Oracle Database management, querying, and administration.

Oracle Database 11g

Collection of APIs and interfaces available for Oracle Database 11g.

Oracle Database 19c

Oracle Database 19c is a multi-model database management system that provides a comprehensive platform for enterprise data management, analytics, and applica...

Oracle E-Business Suite

A collection of APIs for Oracle E-Business Suite (EBS), Oracle's comprehensive suite of integrated, global business applications that supports today's evolvi...

Oracle Eloqua

Oracle Eloqua is a marketing automation platform that provides tools for lead management, email marketing, and marketing campaign management through comprehe...

Oracle Eloqua

Oracle Eloqua is a B2B marketing automation platform within Oracle Marketing Cloud that enables marketers to plan and execute multi-channel campaigns, manage...

Oracle Enterprise Manager

Oracle Enterprise Manager (OEM) provides a comprehensive management platform for managing Oracle IT infrastructure and applications. The APIs enable programm...

Oracle Essbase

Oracle Essbase is a multi-dimensional database management system that provides a multidimensional analytical platform for business intelligence applications,...

Oracle Financial Applications

Collection of APIs for Oracle's suite of financial management applications including ERP Cloud, EPM Cloud, and related financial services.

Oracle Financials

Collection of Oracle Financials Cloud APIs for financial management, accounting, and reporting.

Oracle Financials 12

Collection of REST APIs for Oracle E-Business Suite Financials Release 12.

Oracle Fusion Cloud Applications

Oracle Fusion Cloud Applications represent a comprehensive suite of cloud-based enterprise resource planning (ERP), human capital management (HCM), customer ...

Oracle General Ledger

Oracle Fusion Cloud General Ledger provides REST APIs for managing core financial accounting operations within Oracle Cloud ERP. These APIs enable programmat...

Oracle GoldenGate

Oracle GoldenGate enables real-time data integration and replication in heterogeneous IT environments. These APIs provide programmatic access to manage and m...

Oracle Health Data Intelligence

Oracle Health Data Intelligence is a comprehensive platform that leverages advanced analytics and artificial intelligence to provide actionable insights and ...

Oracle Integration

Oracle Integration provides native connectivity to Oracle and non-Oracle Software as a Service (SaaS) and on-premises

Oracle NetSuite

Oracle NetSuite is a cloud-based business management suite that combines ERP, financials, CRM, inventory, supply chain, ecommerce, and human capital manageme...

Oracle NetSuite

Oracle NetSuite is a cloud-based ERP suite covering financials, accounting, order management, inventory, CRM, ecommerce, HR, and professional services automa...

Oracle Partitioning

Oracle Partitioning enables tables and indexes to be partitioned into smaller, more manageable pieces, improving performance, availability, and manageability...

Oracle Planning

A collection of APIs for Oracle Planning and Budgeting Cloud Service (PBCS) and Enterprise Performance Management (EPM) Planning. Oracle EPM Cloud provides R...

Oracle Platforms

A collection of APIs and services provided by Oracle's cloud and enterprise platforms.

Oracle Primavera

Oracle Primavera is a portfolio of project portfolio management (PPM) applications for construction, engineering, and capital project industries. Primavera A...

Oracle Procurement

A collection of APIs for Oracle Procurement Cloud services, enabling procurement processes, supplier management, purchasing, and spend analysis.

Oracle Retail

Oracle Retail is a suite of cloud and on-premises applications for retailers spanning merchandising, pricing, supply chain, omnichannel order management, poi...

Oracle Siebel

Oracle Siebel CRM APIs provide programmatic access to customer relationship management functionality including sales, marketing, and service automation capab...

Oracle Transportation Management

Oracle Transportation Management (OTM) is a logistics platform delivered as part of Oracle Fusion Cloud Transportation and Global Trade Management. OTM APIs ...

Oracle WebLogic Server

APIs for managing and monitoring Oracle WebLogic Server - a leading platform for building and deploying enterprise Java applications.

Oracle WebLogic Server APIs

Collection of APIs and resources for Oracle WebLogic Server administration and management. WebLogic Server is Oracle's enterprise-grade Java EE application s...

Orange

Orange Developer offers a portfolio of network, communication, identity, location, payment, IoT, and cloud APIs that allow developers to build new customer e...

Orange Business

Orange Business is the B2B, telco-cloud, and developer arm of Orange S.A. — France's leading

ORAS

ORAS (OCI Registry As Storage) is a CNCF project that provides a CLI and a set of client libraries for pushing and pulling arbitrary OCI artifacts to and fro...

Orb

Orb is a billing infrastructure platform providing usage-based pricing, metering, and invoicing for API and cloud products.

ORB Intelligence

"Company lookup"

Orbital

Orbital is a data gateway and integration platform that connects APIs, databases, event streams, and other data sources without requiring glue code or manual...

Orbital ATK

Orbital ATK was an American aerospace manufacturer and defense industry company formed in February 2015 by the merger of Orbital Sciences Corporation and the...

Orbital Insight

Orbital Insight was a Palo Alto, California geospatial analytics company founded in 2013 by James Crawford (formerly Bell Labs, Google Books, and NASA's Mars...

Orca Security

Orca Security is an agentless cloud security platform that uses its patented SideScanning technology to provide visibility into risks across AWS, Azure, Goog...

ORCID

ORCID provides a persistent digital identifier (an ORCID iD) that you own and control, and that distinguishes you from every other researcher. ORCID provides...

Orders

This is a template APIs.json for a orders API, to be used in storytelling, training, and knowledge bases.

Organon

Organon & Co. is a Fortune 500 global healthcare company focused on improving the health of women throughout their lives. Spun off from Merck in 2021, Organo...

Orion Health

Orion Health is a global healthcare technology company that provides health information technology solutions, including population health management, health ...

Orion Health

"Medical platform which allows the development of applications for different healthcare scenarios"

Orizn Visa

"Visa requirements for 199 countries, 39K+ passport-destination pairs in 15 languages"

Orkes

Orkes is a modern workflow orchestration platform built on Netflix Conductor for orchestrating microservices, AI agents, and durable workflows.

Orval

Orval is an open source tool that generates TypeScript API clients, React Query hooks, Angular services, and mock service workers from OpenAPI specifications...

Ory

Ory is an open source identity infrastructure platform providing OAuth2 and OpenID Connect (Hydra), identity and user management (Kratos), permissions and au...

Oscar Health

Oscar Health is a technology-driven health insurance company offering individual, small group, and Medicare Advantage plans. It uses software, member-facing ...

OSGi

OSGi is a set of specifications that define a dynamic component system for Java. It enables modular, service-oriented Java applications by managing the life ...

OSHA

Occupational Safety and Health Administration - U.S. federal agency responsible for setting and enforcing workplace safety and health standards. OSHA provide...

Oshkosh

Oshkosh Corporation is a Fortune 500 industrial company that designs and builds purpose-built vehicles and vehicle bodies, including access equipment, defens...

Osisoft Pi

OSIsoft PI System is a real-time data management platform used by industrial organizations to capture, analyze, and visualize operational data from sensors, ...

osmAPI

osmAPI is a unified AI gateway that routes requests to OpenAI, Anthropic, Google, and 14+ LLM providers through a single API. Drop-in compatible with the Ope...

Others

Otis Worldwide

Otis Worldwide is the world's leading manufacturer, installer, and servicer of elevators, escalators, and moving walkways, serving customers in more than 200...

Otreeba

Open Cannabis Data for Your Technology. Otreeba comes from the word "abierto" which means "open." Otreeba offers standardized cannabis data and normalization...

Otter

Otter (TryOtter) is a Restaurant Operating System used by hundreds of thousands of restaurants worldwide to aggregate delivery and online orders, consolidate...

Oura

Oura is a health-technology company that makes the Oura Ring — a titanium smart ring packed with PPG, body-temperature, SpO2, and motion sensors — and the Ou...

OurPeople

The OurPeople API uses common standards to allow easy read and write access to your data. OurPeople is a frontline communications platform that helps organiz...

Outbrain

Outbrain Inc. (NASDAQ: OB), which closed its acquisition of Teads in early 2025 and now operates publicly as Teads, is one of the largest open-internet a...

Outerwall

Outerwall was a U.S. company specializing in automated retail with brands including Coinstar coin-counting kiosks and Redbox movie rental kiosks before being...

OUTFRONT Media

OUTFRONT Media is a U.S. out-of-home (OOH) advertising company and real estate investment trust (NYSE: OUT) operating a national portfolio of billboards, dig...

Outil Achats

Outil Achats refers to French procurement and purchasing tools used by public and private sector organizations for managing tenders, suppliers, and contracts...

Outils De Gestion Des Risques

Outils de Gestion des Risques refers to risk management tools and services used in French-speaking business and regulatory environments, covering risk assess...

Outils De Tarification

Outils de Tarification refers to pricing and tarification tools used in French-speaking business environments for managing pricing, tariffs, and cost calcula...

Outils De Transfert

Outils de Transfert refers to file transfer and data transfer tools used in French-speaking business environments.

Outils De Travail Digitaux

Outils de Travail Digitaux refers to digital workplace tools and collaboration platforms used in French-speaking business environments.

Outils Digitaux

Outils Digitaux refers to digital tools and resources for developers, designers, and digital professionals in French-speaking environments.

Output

Output is a Los Angeles-based music software company founded in 2013 by composer and CEO Gregg Lehrman that makes creative virtual instruments, audio effects...

Outreach

Outreach is a sales engagement platform unifying email, calling, social, and meetings. APIs expose prospects,

Outscraper

Outscraper provides data scraping and extraction APIs for Google Maps, business data, reviews, and other web data sources. Filter and export company database...

Ovation

Ovation is an AI-first guest experience and feedback platform for restaurants, founded by Zack Oates and voted the #1 guest feedback platform in a Restaurant...

Overture Maps Foundation

Overture Maps Foundation is a Linux Foundation collaborative project that produces free, open, and interoperable map data. Overture publishes cloud-native Ge...

Overture Maps Foundation

The Overture Maps Foundation is a Linux Foundation project created in partnership with Meta, Microsoft, AWS, and TomTom to build reliable, open map data as a...

Overwolf

Overwolf enables developers to build lightweight in-game applications and overlays using HTML and JavaScript. The platform provides APIs for game events, gam...

OVH Cloud

OVH Cloud is a leading provider of cloud computing services that offer a wide range of solutions for businesses

Ovintiv

Ovintiv is a Fortune 500 oil and natural gas exploration and production company headquartered in Denver, Colorado. The company operates across North America ...

OWASP

The Open Worldwide Application Security Project (OWASP) is a nonprofit foundation that works to improve the security of software through community-led open s...

OWASP API Security Project

The OWASP API Security Project focuses on strategies and solutions to understand and mitigate the unique vulnerabilities and security risks of Application Pr...

OWASP ZAP

OWASP ZAP (Zed Attack Proxy) is an open source web application security scanner for finding vulnerabilities in APIs and web applications during development a...

Owen Wilson Wow

"API for actor Owen Wilson's \"wow\" exclamations in movies"

Owens & Minor

Owens & Minor is a global Fortune 500 healthcare solutions company providing essential products and services to healthcare providers and manufacturers across...

Owens Corning

Owens Corning is a global Fortune 500 building and industrial materials leader committed to building a sustainable future through material innovation, provid...

Owens-Illinois (O-I Glass)

Owens-Illinois (now O-I Glass) is one of the world's leading manufacturers of glass containers, supplying glass packaging to the food, beverage, beer, wine, ...

OwlBot

"Definitions with example sentence and photo if available"

OwnBackup

OwnBackup (Own Company) is a SaaS data protection platform providing backup, recovery, and sandbox seeding for Salesforce and other cloud applications.

owo

"A simple link obfuscator/shortener"

Oxford

"Dictionary Data"

Oxia

Oxia is a scalable metadata store and coordination service designed for distributed systems, providing strong consistency guarantees and high availability. I...

Oxylabs

Oxylabs is a Lithuanian (Vilnius-based) web intelligence platform providing premium proxy networks (Residential, Datacenter, Mobile, ISP, Dedicated), web dat...

oyyi

"API for Fake Data, image/video conversion, optimization, pdf optimization and thumbnail generation"