Plugin
An index and topic collection covering plugin, extension, and add-on architectures with public APIs and marketplaces. This collection spans editor and IDE plugin ecosystems (VS Code Marketplace, JetBrains Marketplace, Chrome Web Store, Firefox Add-ons), SaaS platform extension marketplaces (Atlassian Marketplace and Forge, Salesforce AppExchange, Shopify App Store, WordPress Plugins, Slack Apps, Discord Apps, Microsoft AppSource, Google Workspace Marketplace, Notion, Postman, Figma, Sketch, Webflow Apps, HubSpot Marketplace, Zapier App Directory), API gateway plugin frameworks (Kong Plugin Hub, Tyk Plugins, Gravitee Plugins), identity extensibility (Auth0 Actions and Extensions), and AI plugin and tool ecosystems (Open WebUI Functions, ChatGPT Plugins and GPTs, Claude Code plugins, OpenAI tools). It tracks the manifests, listing schemas, install and entitlement flows, extension points, and review and distribution APIs that power modern plugin and extension marketplaces.
Index entry only — little beyond a description and a link, and nothing machine-readable enough for an agent to act on without a human reading the site first.
API Evangelist profiles Plugin the way a machine reads it — 35 machine-readable artifacts, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.
Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — Plugin scores 9.5/100 (minimal), with a separate agent-readiness read of 0/100 (human only). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
Kin Score
This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance. Every facet and dimension name is a link: it opens that measurement's page on APIs.io, where the rating runs across the whole catalog — the exact checks that feed it, how every profiled provider distributes on it, and who is at the top of it.
Kin Score
How this is scored →scored 2026-10-03 · rubric v0.23.0
Put this on your own site. The badge is drawn live from Plugin's current Kin Score — paste it once and it updates itself every time the score is recomputed. It follows your visitor's light or dark setting, and it links back here so anyone who sees it can read the full breakdown.
<!-- Kin Score · API Evangelist -->
<a href="https://providers.apievangelist.com/providers/plugin/"
title="Plugin on API Evangelist — API profile and Kin Score">
<img src="https://apis.io/badge/plugin.svg"
alt="Plugin Kin Score — API readiness rating by API Evangelist" width="150" height="150" loading="lazy">
</a>[](https://providers.apievangelist.com/providers/plugin/)<!-- Kin Score · API Evangelist -->
<a href="https://providers.apievangelist.com/providers/plugin/"
title="Plugin on API Evangelist — API profile and Kin Score">
<img src="https://apis.io/badge/plugin/card.svg"
alt="Plugin Kin Score — API readiness rating by API Evangelist" width="340" height="120" loading="lazy">
</a>More shapes, themes and sizes → · Score as JSON · How badges work
How we profile Plugin
Each block below is one kind of artifact we hold for Plugin. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.
Features 7
The notable capabilities this provider advertises, captured as structured features so they can be searched and compared instead of read one landing page at a time.
Notable capabilities this provider offers.
Plugin Manifests
Marketplaces and runtimes use declarative manifests (manifest.json for Chrome and VS Code, plugin.xml for JetBrains, app manifests for Slack and Atlassian Connect) to describe i...
Marketplace Listing and Discovery APIs
Public APIs and search endpoints expose listings, categories, ratings, and download counts so developers and users can discover plugins across VS Code Marketplace, Chrome Web St...
Extension Points and Hooks
Host platforms expose well-defined extension points, events, and lifecycle hooks (Forge modules, Shopify Functions, Auth0 Actions, Kong plugin phases, WordPress hooks) that plug...
Install, Update, and Entitlement Flows
Marketplaces standardize installation, OAuth grant, license check, and entitlement validation flows for individual users, organizations, and tenants, including paid plugin billi...
Sandboxing and Permissions
Plugin runtimes enforce permission scopes, sandboxed execution (Atlassian Forge, Chrome MV3 service workers, Slack Bolt scopes, Salesforce managed packages) and review processes...
AI Tooling and Agent Plugins
AI platforms expose plugin and tool surfaces (ChatGPT GPTs and plugins, Open WebUI Functions, Claude Code plugins, OpenAI tools) that let third-party developers extend LLM behav...
API Gateway Plugin Frameworks
API gateways such as Kong, Tyk, and Gravitee define plugin frameworks where authentication, transformation, rate limiting, and observability behavior is implemented and distribu...
Scroll within the panel for all 7 ·
Semantic Vocabularies 1
JSON-LD contexts give the data shared meaning across APIs. We profile them because semantics are what let a machine reconcile 'customer' here with 'customer' somewhere else.
JSON-LD contexts and semantic vocabularies used across these APIs.
Plugin Context
JSON-LDJSON Schema 2
Standalone JSON Schema definitions describe the data models behind the API. We profile them so the shapes are validatable on their own — useful long after a single request is forgotten.
Standalone JSON Schema definitions for this provider's data models.
PluginManifest
JSON SCHEMAMarketplaceListing
JSON SCHEMAJSON Structure 2
JSON Structure captures the data shapes in a form built for tooling — a complement to JSON Schema that keeps the model machine-legible.
JSON Structure definitions describing this provider's data shapes.
Plugin Manifest Structure
JSON STRUCTUREPlugin Marketplace Listing Structure
JSON STRUCTUREExamples 2
Real request and response payloads are what turn a spec from abstract into obvious — and they're one of the twelve things an agent needs to call an API correctly on the first try.
Example request and response payloads for these APIs.
Plugin Manifest Example
EXAMPLEUse Cases 7
What developers actually build with this provider — captured so the catalogue answers 'what is this for', not just 'what does this expose'.
What developers build with this provider.
Editor and IDE Extensibility
Developers ship language support, linters, debuggers, and AI assistants as plugins through VS Code Marketplace and JetBrains Marketplace, reaching millions of editor installatio...
SaaS Platform App Marketplaces
ISVs build and list apps on Salesforce AppExchange, Shopify App Store, Atlassian Marketplace, HubSpot Marketplace, and Slack App Directory to extend SaaS platforms and reach ent...
Browser Extension Distribution
Developers package and distribute browser extensions for content blocking, productivity, password management, and accessibility through Chrome Web Store, Firefox Add-ons, and Mi...
API Gateway Customization
Platform teams extend Kong, Tyk, and Gravitee with custom plugins for authentication, request transformation, AI prompt firewalls, and policy enforcement, often shared through p...
CMS and Commerce Extensibility
WordPress plugin directory and Shopify App Store let merchants and publishers extend CMS and commerce platforms with payment processors, shipping integrations, page builders, an...
AI Agent Tooling
Builders publish ChatGPT GPTs and plugins, Open WebUI Functions, and Claude Code plugins to give AI agents domain-specific tools, retrieval sources, and connectors to external s...
Identity and Access Extensions
Auth0 Actions, Extensions, and the Auth0 Marketplace let teams add custom rules, MFA providers, and SSO integrations to identity flows without forking the platform.
Scroll within the panel for all 7 ·
Integrations 14
Pre-built integrations with other platforms tell you where this provider already fits in a stack.
Pre-built integrations with other platforms and tools.
VS Code Marketplace
Microsoft's marketplace for Visual Studio Code and Visual Studio extensions, with a Gallery API for search, download, and metadata.
JetBrains Marketplace
Official plugin and theme distribution platform for IntelliJ IDEA, PyCharm, WebStorm, and other JetBrains IDEs with a public plugins API.
Chrome Web Store
Google's distribution channel for Chrome and Edge browser extensions and themes, governed by Manifest V3 and the Chrome Web Store API.
Atlassian Marketplace
Marketplace for apps that extend Jira, Confluence, and Bitbucket, including Atlassian Connect and Forge apps with a public Marketplace REST API.
Salesforce AppExchange
Enterprise marketplace for managed packages and Lightning components extending Salesforce CRM, with package install APIs and security review.
Shopify App Store
Marketplace for apps extending Shopify Admin, Storefront, and Checkout via Shopify Apps, Functions, and Theme App Extensions.
WordPress Plugin Directory
Open directory of free WordPress plugins powering a large share of the web, distributed through wordpress.org with a public plugins.org API.
Slack App Directory
Directory of Slack apps and integrations built on the Slack platform, manifested through app config and the Apps API.
Microsoft AppSource
Microsoft's marketplace for business apps and Office 365 add-ins, Teams apps, and Power Platform connectors.
Google Workspace Marketplace
Distribution platform for Google Workspace add-ons and Apps Script-based extensions to Gmail, Drive, Docs, Sheets, and Calendar.
HubSpot Marketplace
Marketplace for HubSpot apps, themes, and templates extending the HubSpot CRM and CMS via OAuth apps and serverless functions.
Zapier App Directory
Directory of integrations and triggers/actions that Zapier exposes to its automation builder via the Zapier Platform CLI and Public APIs.
Kong Plugin Hub
Catalog of first-party and community plugins for Kong Gateway and Konnect, written in Lua, Go, or JavaScript and distributed through the Plugin Hub.
Open WebUI Functions
Pluggable functions, tools, and pipelines that extend the Open WebUI LLM chat interface with custom integrations and behavior.
Scroll within the panel for all 14 ·
Resources
Every other property we hold for Plugin — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.
Get Started 1
Portal, sign-up, and the first successful call
Build 1
SDKs, sample code, and the tooling you integrate with
← All providers · Data indexed from github.com/api-evangelist/plugin · machine-readable index on apis.io
This is an independent, third-party profile of Plugin, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.
The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.
Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.
info@apievangelist.com
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you will get a person, not a form — we will tell you exactly which public URLs this profile was built from.