J-Quants is a financial data API service operated by Japan Exchange Group (JPX) that makes it easy for retail investors to obtain cleansed financial data suc...
J.B. Hunt Transport Services, Inc. is one of the largest transportation and logistics companies in North America, providing trucking, intermodal, and contrac...
J.C. Penney Company, Inc. (JCPenney) is an American department store chain offering apparel, accessories, beauty, jewelry, footwear, and home goods. The comp...
J.Crew Group, Inc. is an American multi-brand specialty retailer offering women's, men's, and children's apparel, shoes, and accessories under the J.Crew, Ma...
The J.M. Smucker Company is a leading marketer and manufacturer of consumer food and beverage products and pet food and pet snacks in North America, with bra...
Jabil is a global manufacturing services company that provides engineering, supply chain, and manufactured product solutions for the world's leading brands a...
Jabil (formerly Jabil Circuit) is a global manufacturing services and solutions company providing comprehensive electronics design, production, and product m...
Jack & Jill is an AI hiring platform built around two complementary AI agents. Jack is a free AI career agent for candidates: it scans roughly 15 million job...
Jack Henry & Associates (Nasdaq: JKHY) is an S&P 500 financial technology company that provides core banking, payments, lending, digital banking, and fraud-p...
Jack in the Box Inc. (NASDAQ: JACK), founded in 1951 and headquartered in San Diego, California, is a quick-service restaurant company operating and franchis...
Jacobio Pharma (Jacobio Pharmaceutica) is a clinical-stage biopharmaceutical company focused on discovering and developing novel small-molecule cancer therap...
Jacobs Engineering Group, now operating as Jacobs Solutions, is one of the world's largest providers of professional, technical, and construction services, o...
Jacobs Solutions is a global technology-forward solutions company providing consulting, design, engineering, technical, scientific, and project delivery serv...
Jade (Jade ND) is a Brazil-, UAE-, and UK-based education technology company building inclusive digital solutions for neurodivergent children, including thos...
Jadu is a General Catalyst-backed company tracked in the API Evangelist network. Its public site at jadu.io presents JADU as AI-powered crypto trading automa...
Jaeger is an open source, end-to-end distributed tracing system for monitoring and troubleshooting microservices-based architectures. Jaeger provides visibil...
Jaeger is an open-source, end-to-end distributed tracing platform for monitoring and troubleshooting transactions in complex distributed systems. Originally ...
Jagex is a British video game developer and publisher headquartered in Cambridge, England, best known as the studio behind RuneScape and Old School RuneScape...
Jain Irrigation Systems Ltd (JISL) is a global agri-industrial conglomerate headquartered in Jalgaon, Maharashtra, India, and is widely cited as the world's ...
Jaipur Robotics is a Manno, Switzerland based deep-tech company building advanced computer vision and deep learning solutions for the waste-to-energy sector....
Jakarta EE is the open source successor to Java EE, providing a set of specifications for enterprise Java development. Jakarta EE is developed under the Ecli...
Jam is a bug-reporting and debugging-telemetry tool for software teams. Its Chrome extension and iOS app capture one-click bug reports that bundle a screen r...
Jama Software is the maker of Jama Connect, a requirements management and live-traceability platform used by teams building complex products, systems, and so...
JamBase is a live music data platform with over 25 years of concert history, providing access to 5M+ performances, 616K+ artist profiles, 91K+ venues, and 20...
A free, third-party API for accessing James Webb Space Telescope data sourced from the Mikulski Archive for Space Telescopes (MAST). The API provides access ...
Jamf is the standard in managing and securing Apple devices at scale for business, education, and government. Its cloud platform pairs Apple device managemen...
Jane is a cloud-based practice management platform for health and wellness clinics, headquartered in North Vancouver, Canada, with regional data residency ac...
Janney Montgomery Scott LLC is a full-service wealth management, financial services, and investment banking firm headquartered in Philadelphia, Pennsylvania,...
Janssen Pharmaceuticals was a Belgian pharmaceutical company founded in 1953 by Paul Janssen and acquired by Johnson & Johnson in 1961. The company specializ...
Jar is a Bengaluru-based fintech company operating India's first micro-savings app, enabling tens of millions of Indians to save in 24K digital gold from as ...
Jarden Corporation was an American consumer products conglomerate that owned brands across Outdoor Solutions (Coleman, K2 Sports, Marmot, Rawlings), Consumer...
Jargon is a platform for Domain Driven Design for APIs and Enterprise Data Modelling. It provides text-based modelling, template-based API design, real-time ...
Jaris is an embedded-finance infrastructure company that lets payment processors, ISOs, payment service providers, and SaaS platforms embed and launch a suit...
Jarmin is a Y Combinator-backed company building autonomous "AI employees" for technical and operational roles — ML engineers, financial analysts, account ex...
Jask Labs (JASK) was a cybersecurity company that built an Autonomous Security Operations Center (ASOC) platform — applying machine learning and analytics on...
Jasper is an AI platform purpose-built for marketing teams that orchestrates 100+ specialized AI agents and connected content pipelines to run end-to-end mar...
Jaspersoft is a business intelligence and embedded analytics platform, now part of Cloud Software Group (formerly TIBCO). Its flagship products are the open-...
Java is a high-level, class-based, object-oriented programming language developed by Sun Microsystems and now stewarded by Oracle. The Java Standard Edition ...
Java EE (Java Platform, Enterprise Edition) was a set of specifications extending the Java SE platform with enterprise features such as distributed computing...
JavaScript is a lightweight, interpreted, or just-in-time compiled programming language with first-class functions. It is a multi-paradigm, dynamic language ...
JAX-WS (Java API for XML Web Services) is a Java standard for building and consuming SOAP-based XML web services. Originally specified as JSR 224 under the J...
Japan Aerospace Exploration Agency (JAXA) provides public APIs and data services for satellite Earth observation data, including GCOM/ALOS satellite imagery,...
JAYS is a Swedish consumer audio brand founded in 2006 by Jens and Johan, headquartered in Sweden and owned by the Northbaze Group AB. It designs and sells w...
Jazz Pharmaceuticals is a major US corporation and Fortune 1000 company. The Jazz Pharmaceuticals API provides programmatic access to its platform services, ...
JBoss is a division of Red Hat providing open source middleware and application server technologies for enterprise Java workloads. The JBoss product portfoli...
JCR (Java Content Repository) is a Java specification (JSR-283, "Content Repository for Java Technology API 2.0") that provides a vendor-neutral, implementat...
JD.com (Jingdong) is one of China's largest direct-sales e-commerce platforms, operating a vast first-party retail business and a third-party (POP) marketpla...
JDBC (Java Database Connectivity) is a Java API that defines how a client may access a database. It provides methods for querying and updating data in a data...
Jedify is an enterprise AI platform that fuses business context with multi-source data into an AI-ready contextual "context layer" (Semantic Fusion) so compa...
Jedox is an enterprise performance management (EPM) and financial planning & analysis (FP&A) software company headquartered in Freiburg, Germany. Its platfor...
Jeeves is a global financial platform for cross-border businesses, combining corporate cards (physical and virtual with spend controls and cashback), automat...
Jefferies Financial Group is a leading global, full-service investment banking and capital markets firm providing advisory, capital raising, sales, trading, ...
Jefferies Financial Group Inc. is a diversified financial services company engaged in investment banking and capital markets, asset management, and direct in...
Jefferson Health is a multi-state nonprofit academic health system based in Philadelphia, Pennsylvania, operating more than 30 hospitals and over 700 care si...
Jeh Aerospace is a precision aerospace manufacturing company building "future factories" across the US-India corridor to supply aerostructures and aero-engin...
Jelly (getjelly.co.uk) is an all-in-one costing and kitchen-management platform for the hospitality industry - restaurants and professional kitchens. It hand...
Jelly Belly is the iconic American gourmet jelly bean candy company, owned by Ferrara Candy Company, known for its signature flavor assortments, themed colle...
Jenesis Software is a web-based insurance agency management system (AMS) for independent property and casualty agencies, offering client and policy managemen...
Jenkins is the leading open source automation server that enables developers to reliably build, test, and deploy software. Jenkins exposes a machine-consumab...
Jenkins Pipeline is a suite of plugins for the Jenkins automation server that supports implementing and integrating continuous delivery pipelines as code. It...
Jentic is an AI infrastructure company building the agentic knowledge layer for APIs. Founded in late 2024 and backed by $4.5M in pre-seed funding, Jentic en...
Jest is a delightful JavaScript testing framework with a focus on simplicity. It works with projects using Babel, TypeScript, Node, React, Angular, Vue and m...
JetBlue Airways is a low-cost airline that operates flights to destinations across the United States, Caribbean, Latin America, and Europe, known for its cus...
JetBrains is a software development company that provides integrated development environments, CI/CD tools, issue tracking, and team collaboration platforms ...
JetBrains Marketplace is the official plugin and theme distribution platform for JetBrains IDEs including IntelliJ IDEA, PyCharm, WebStorm, PhpStorm, GoLand,...
Jetic is the first and only cloud-native API & Integration Platform based on Apache Camel. An iPaaS solution for avoiding costly vendor lock-ins and regainin...
Jetify builds developer tooling for reproducible environments and package management, backed by the Nix ecosystem. Its open-source Devbox CLI creates instant...
Jetty is a financial-services company built for the real estate industry, making renting more accessible and affordable for renters while helping property ma...
Jewelbots makes smart, codable friendship bracelets designed to teach kids (primarily tween girls) to code. The wearable is an Arduino-compatible, Bluetooth ...
JFrog provides universal DevOps solutions for software supply chain automation and security, offering a unified platform for managing binaries, securing the ...
JFrog Artifactory is a universal artifact repository manager supporting all major package formats and build tools including Maven, Gradle, npm, NuGet, PyPI, ...
JFrog Container Registry is a free, hybrid, and multi-cloud Docker registry and Helm chart repository for managing and distributing container images. It prov...
Jiayuan (世纪佳缘, jiayuan.com) is one of China's largest online dating and serious-relationship matchmaking platforms, connecting members seeking marriage and l...
Jib is an open-source container image builder from Google that builds optimized Docker and OCI images for Java applications without requiring a Docker daemon...
Through our white-labeled platform, banks and lenders embed their loans at any point of sale, giving merchants access to the most competitive business and co...
Jigso is a proactive AI operating system for enterprises that synthesizes data from across a company's business applications - CRM, support, communication, a...
Jina AI provides Search Foundation APIs for AI-powered applications, offering embeddings, reranking, and web reading capabilities. Their Reader API converts ...
Jinba is an enterprise-grade platform for building, running, and deploying AI-powered workflows and agents using natural language. Business teams describe a ...
Jingle is a consumer marketplace mobile app for fast, direct local deliveries from mobile stores and services — "shops-on-wheels" — operating in the San Fran...
Jingle Pay is a DFSA-regulated (Dubai Financial Services Authority) digital financial services fintech headquartered in the UAE, offering an all-in-one mobil...
Jinx is a direct-to-consumer pet nutrition brand selling premium dog and cat food, toppers, and treats at thinkjinx.com. Its product lines span dry kibble, w...
Jiobit is a real-time GPS tracking device company owned by Life360, based in San Mateo, California. Its lightweight (18g) wearable tracker is designed for ki...
Jito Labs is the Solana MEV infrastructure company behind Jito-Solana, the MEV-enabled validator client that runs on the majority of Solana mainnet stake, an...
Jitsi is a collection of free and open-source projects for secure, simple, and scalable real-time video conferencing, maintained by 8x8. The Jitsi stack comb...
Jitterbit is a modern enterprise iPaaS platform infused with AI for API integrations. The Jitterbit Developer Portal provides resources for creating connecto...
JMock is a library that supports test-driven development of Java code with mock objects. It provides an expressive API for defining expectations and mock beh...
Java Message Service (JMS), now known as Jakarta Messaging, is a Java API that allows applications to create, send, receive, and read messages. It defines a ...
Job Corps is the nation's largest free residential education and job training program for young adults, operated by the U.S. Department of Labor. It helps el...
JobAdder is a cloud-based recruitment and applicant tracking platform used by staffing agencies and in-house talent acquisition teams to manage jobs, candida...
Jobber is field service management software for home and commercial service businesses, serving 100,000+ businesses across more than 50 trade verticals (clea...
Joblocal GmbH is a Munich-based German recruiting technology company and a part of the Funke Mediengruppe. With more than fifteen years of experience it oper...
JobNimbus is a CRM and project management platform built for contractors, particularly in roofing, restoration, and home services industries. The platform en...
Jobvite, part of Employ Inc., is an applicant tracking system (ATS) and recruiting platform that helps enterprises source, hire, and onboard talent. The plat...
Joby Aviation is a California-based aerospace company developing an all-electric vertical take-off and landing (eVTOL) aircraft intended to operate as part o...
Joggr is a documentation platform purpose-built for software teams. It bridges the gap between traditional dev docs and modern development workflows, helping...
John Deere is a manufacturer of agricultural, construction, and forestry machinery, equipment, and technology. Through its Operations Center and Precision Te...
Johns Hopkins University is a private research university in Baltimore, Maryland, ranked #22 in the QS World University Rankings 2025. It maintains a real pu...
Johnson & Johnson is a multinational pharmaceutical and medical devices corporation. Operating today as Johnson & Johnson Innovative Medicine and MedTech, J&...
Johnson Controls is a global diversified technology and multi-industrial leader serving customers in over 150 countries, providing products, services, and so...
Joinmidi (Midi Health) is a virtual care company for women in midlife, providing insurance-covered telehealth from women's health specialists across all 50 s...
The Joint Fire Science Program (JFSP) funds scientific research on wildland fires and distributes results to help policymakers, fire managers and practitione...
JokeAPI is a free, open-source REST API that delivers consistently formatted jokes with no authentication, registration, or payment required. It provides ove...
JokeAPI is a free, open source REST API that delivers consistently formatted jokes in JSON, XML, YAML, or plain text. It exposes seven joke categories (Any, ...
Jolly is an AI-powered workforce engagement platform that uses a points-based rewards system, gamification, and performance-based incentives to drive engagem...
JOLYN is an athletic swimwear and apparel brand for competitive and team swimming, water polo, and aquatics, known for durable, functional practice and racin...
Jones is a full-service SaaS platform purpose-built for insurance compliance in construction and commercial real estate, unifying Certificate of Insurance (C...
The Jones Financial Companies is the parent company of Edward Jones, a financial services firm that serves individual investors through a network of branch o...
Jones Lang LaSalle Incorporated (JLL) is a global commercial real estate services company offering investment management, property management, and facility s...
Joomla is a free and open-source content management system (CMS) built in PHP that includes a built-in REST API for managing core content types. The Web Serv...
Joopiter (stylized JOOPITER) is a digital-first auction house and marketplace founded by Pharrell Williams for rare objects and culturally significant collec...
JOOR is a New York-based SaaS company (founded 2010) operating a leading B2B wholesale fashion commerce platform and digital marketplace that connects fashio...
Jopwell was a career advancement and diversity-recruiting platform that connected Black, Latinx, and Native American students and professionals with employer...
Josys is a SaaS and IT asset management platform providing automated provisioning, license optimization, and device management. Josys publishes a developer A...
Jotform is an online form builder with strong workflow, payments and data collection capabilities. The Jotform API exposes forms, submissions, reports, folde...
Journey Clinical is a telehealth platform for ketamine-assisted psychotherapy (KAP). It pairs licensed medical prescribers who manage patient eligibility, pr...
Journey (Journey Meditation) is a workplace mental health platform that delivers preventive Employee Assistance Program (EAP) services to enterprise organiza...
Joy Global was a worldwide leader in manufacturing, servicing, and distributing equipment for surface mining, underground mining, and rock excavation before ...
Joyful Health provides AI-assisted revenue recovery for healthcare organizations, combining automated claim investigation with expert billing teams to recove...
JoySpace Technologies, Inc. (Joyspace) operates an enterprise AI video transformation platform that turns long-form video into viral short clips, captions in...
Jakarta Persistence (formerly Java Persistence API / JPA) defines a Java specification and binding layer for the management of persistence and object-relatio...
JPMorgan Chase is a leading global financial services firm and one of the largest banking institutions in the United States, with operations across investmen...
jQuery is a fast, small, and feature-rich JavaScript library that makes HTML document traversal and manipulation, event handling, animation, and Ajax much si...
jService is an open source Ruby on Rails trivia API that serves approximately 200,000 Jeopardy! questions, answers, and categories scraped from the J! Archiv...
Jakarta Faces (formerly JavaServer Faces / JSF) is an MVC framework for building component-based user interfaces for Java web applications. It simplifies the...
JSON (JavaScript Object Notation) is a lightweight, text-based, language-independent data interchange format that uses human-readable text to represent struc...
Jakarta JSON Binding (JSON-B) defines a standard binding layer for converting Java objects to and from JSON documents. It specifies a default mapping algorit...
JSON Processing (JSON-P) is a Java API for parsing, generating, transforming, and querying JSON messages. Standardized as Jakarta JSON Processing, it provide...
JSON Schema is a vocabulary for annotating and validating JSON documents, widely used for defining API request and response shapes across REST APIs. The curr...
Free fake REST API for testing and prototyping providing mock data for posts, comments, albums, photos, todos, and users without any setup. Handles approxima...
JSONPlaceholder is a free, no-auth fake REST API for prototyping, tutorials, and testing. It exposes six relational resources — posts, comments, albums, phot...
JSR-303 (Bean Validation) is a Java specification that defines a metadata model and API for JavaBean validation. It provides a standard way to define validat...
JubileeTV (by Caavo) is a US consumer remote-caregiving system that turns an aging loved one's existing television into a family connection and monitoring hu...
JubileeTV is a remote caregiving system that turns an aging loved one's existing television into a simple connection, monitoring, and video-calling hub. A sm...
Judgment Labs builds the continuous-improvement stack for AI agents: tooling to trace, evaluate, monitor, and improve agent behavior in production. Its open-...
Judi Health (formerly Capital Rx) is a healthcare technology company delivering unified pharmacy and medical benefit administration. Its platform, Judi, is a...
Julaya is a West African B2B fintech, founded in 2018 and headquartered in Abidjan, Cote d'Ivoire, that digitizes corporate financial operations across the U...
Juleb is a Saudi Arabia-based pharma-tech and retail software company providing an integrated cloud platform for the health, retail, and distribution sectors...
Julep is an open-source platform for building stateful AI agents that remember past interactions and execute long-running, multi-step tasks. Its cloud API an...
Julep is a direct-to-consumer beauty brand selling makeup, skincare, nail polish, and value sets, founded in Seattle by Jane Park and backed by Andreessen Ho...
Jules is Google's autonomous, asynchronous AI coding agent, developed inside Google Labs and powered by the Gemini family of models (currently Gemini 2.5 Pro...
JULES.md is a configuration file format for the Google Jules AI coding agent, providing project-specific instructions, architecture context, and coding stand...
Juli is a US-based (Hull, Massachusetts) digital-health company building an AI-powered mobile platform that helps people manage complex, hard-to-treat chroni...
JuliaHub, Inc. (founded in 2015 as Julia Computing by the creators of the Julia programming language) develops the open-source Julia language and operates Ju...
JuliaHub is the company behind the Julia programming language, offering a cloud platform for large-scale, reproducible Julia computing — batch jobs, dataset ...
JULIENNE BRUNO is a London-based food company that creates, develops and produces naturally plant-based fresh cheeses. Its Collection 01 comprises Burrella, ...
Jumba is a Nairobi-based construction technology company founded in 2022 that digitizes the sourcing and financing of construction materials across Africa. I...
Jumbo (Jumbo Privacy) was a mobile-first consumer privacy and security assistant founded in 2019 by Pierre Valade, the co-founder of the Sunrise calendar app...
Jumia is a pan-African e-commerce company often described as the "Amazon of Africa." Headquartered in Berlin and listed on the New York Stock Exchange under ...
Jumio operates the KYX Platform, an end-to-end AI-driven identity verification, fraud prevention, and compliance suite. Backend APIs orchestrate ID verificat...
JUMO is a Cape Town-based banking-as-a-service (BaaS) platform, founded in 2015, that uses artificial intelligence to power digital credit and savings produc...
Jump is an AI operating system for financial advisors, used by 35,000+ advisors and ranked #1 across T3, Kitces, and The Oasis Group reports. It organizes it...
JumpCloud is an open directory platform that unifies identity, access, and device management across users, devices, networks, and SaaS applications. Its clou...
June is a product analytics platform purpose-built for B2B SaaS companies, providing company-level and user-level analytics focused on key SaaS metrics such ...
Jungla, Inc. was a San Francisco precision-medicine informatics startup founded in 2016 by Alexander Colavin and Carlos Araya. Backed by Andreessen Horowitz ...
Junglee Games is a skill-based online gaming company founded in 2012 by Ankush Gera, operating as an independent subsidiary of Flutter Entertainment, which a...
Juni is a Swedish fintech (headquartered in Göteborg, founded 2020) that provides a financial platform for ecommerce and digital businesses: business banking...
Juniper Behavioral Health (now operating as Camber, camber.health) is a healthcare revenue-cycle-management (RCM) software company for specialty and behavior...
Juniper Square is the fund operating system (GPX) for private markets, used by 2,300+ private-markets GPs to raise capital, run fund administration and fund ...
Juniper Square is a fund operating system for the private markets, used by 2,300+ general partners across private equity, venture capital, commercial real es...
JUnit is a programmer-friendly testing framework for Java and the JVM. JUnit 5 is the next generation of JUnit, composed of three modules: JUnit Platform, JU...
Juno is a Brazilian B2B payments fintech, acquired by EBANX in October 2021, that provides a complete billing and payments platform for Brazilian companies. ...
Juno (junocompanion.com), operated by SharedGenes, Inc., is a Y Combinator-backed (P26) consumer digital-health startup building an AI personal health assist...
Juno Journey is an AI-powered Learning & Development (L&D) platform that unifies employee training, personalized development planning, skills analytics, and ...
Junomedical (now Qunomedical) is a Berlin-based digital health company founded in 2015 by Dr. Sophie Chung that connects patients with professionally-vetted ...
Junto is a Berlin-based leadership-development company and a portfolio company of Earlybird Venture Capital. Junto delivers cohort-based, live and interactiv...
Jupiter is the liquidity infrastructure powering the majority of DeFi on Solana. It aggregates spot DEXes, runs leveraged perpetuals, supports limit orders, ...
Jupiter is the leading Solana DEX aggregator and liquidity infrastructure platform. APIs cover Swap (token exchanges), Tokens (metadata and verification), Pr...
Jupiter Intelligence is a climate risk analytics company founded in 2017 and headquartered in San Mateo, California. Built by climate scientists, Jupiter del...
Jupiter Money is a Bengaluru-based Indian digital banking app (neobank) operated by Amica Financial Technologies Private Limited. Founded in 2019 by Jitendra...
Project Jupyter is an open-source initiative that develops the software, open standards, and services for interactive computing across dozens of programming ...
Jupyter Notebook is the original open-source web application for creating and sharing computational documents that contain live code, equations, visualizatio...
Jupyter Notebooks is the original web application for creating and sharing computational documents. APIs cover the notebook server, kernels, sessions, conten...
Jupyter Server is the backend that powers Jupyter Notebook, JupyterLab, and other Jupyter web applications. It provides the core REST API for managing kernel...
JupyterHub is a multi-user server for Jupyter notebooks. It manages and proxies multiple instances of the single-user Jupyter notebook server, providing auth...
JupyterHub is a multi-user server for Jupyter notebooks. It manages authentication, spawns and proxies multiple instances of the single-user Jupyter notebook...
JupyterLab is the next-generation web-based interactive development environment for notebooks, code, and data. It is served by Jupyter Server and ships with ...
Just Eat Takeaway.com is a leading global online food-delivery marketplace, formed by the 2020 merger of Just Eat and Takeaway.com and headquartered in Amste...
JustCall is a cloud-based phone system and contact center platform that provides voice calling, SMS/MMS messaging, IVR, call analytics, and contact managemen...
JustiFi is an embedded-payments and PayFac-as-a-service platform that lets SaaS companies add payment processing to their software. Its REST API (base https:...
Justinian is an applied AI company, backed by Y Combinator (Summer 2026), building what it calls the first AI-native government affairs firm. Founded by Part...
Justworks is a New York City-based Professional Employer Organization (PEO) and small-business HR platform. It bundles payroll, tax filing, multi-state compl...
Yo (justyo.co) was a single-tap notification app and "the world's simplest API." A service registered an API username, received an api_token, and could push ...
Juvo is a San Francisco based fintech company, founded in 2014, that provides Financial Identity as a Service (FiDaaS). In partnership with mobile network op...
JW Player is a video player and streaming platform offering REST APIs for media management, playlist creation, player configuration, analytics, and live stre...