# Stoplight

> Stoplight is a collaborative, design-first API platform: a visual OpenAPI editor,
> hosted interactive documentation, automatic Prism-powered mock servers, and API
> style guides and governance through Spectral. Acquired by SmartBear in 2023 and now
> positioned inside SmartBear's API Hub alongside SwaggerHub. Generated by API
> Evangelist on 2026-08-27 — Stoplight serves no /llms.txt of its own (404 on
> stoplight.io and docs.stoplight.io, probed 2026-08-27).

Important: Stoplight publishes no OpenAPI for its CURRENT platform API. The only
machine-readable contract it has ever published is for the legacy v1 (Classic) API,
five operations, mirrored below. Everything else on this page is documentation.

## APIs

- [Stoplight Platform](https://stoplight.io): SaaS design-first API design, documentation, mocking and governance. OpenAPI 3.1/3.0/2.0, Arazzo 1.0, AsyncAPI 2.x. Git integrations for GitHub, GitLab, Bitbucket and Azure DevOps.
- [Stoplight v1 (Classic) Platform API](https://api.stoplight.io/v1): Legacy. Export, import, publish and unpublish an API description version. Authorization header API key.
- [Prism](https://stoplight.io/open-source/prism): Open-source HTTP mock and validation-proxy server for OpenAPI 2/3 and Postman Collections.
- [Spectral](https://stoplight.io/open-source/spectral): Open-source JSON/YAML linter for API style guides and governance.
- [Elements](https://stoplight.io/open-source/elements): Open-source React / Web Component library for interactive API reference documentation.
- [Stoplight CLI](https://docs.stoplight.io/docs/platform/f76c84240244f-publish-with-the-stoplight-cli): Publish local project content into a Stoplight workspace from CI.

## Specs

- [Stoplight v1 Platform OpenAPI 3.0.0](https://raw.githubusercontent.com/api-evangelist/stoplight/main/openapi/stoplight-platform-v1-openapi.yml): 5 operations. servers[] https://api.stoplight.io/v1.
- [Verbatim harvest](https://raw.githubusercontent.com/api-evangelist/stoplight/main/openapi/_original/stoplight-openapi.json): As published, with Stoplight's own x-origin export URL.
- [API Evangelist Overlay](https://raw.githubusercontent.com/api-evangelist/stoplight/main/overlays/stoplight-platform-v1-overlay.yaml): OpenAPI Overlay 1.0.0 of our enhancements.
- [Spectral ruleset JSON Schema](https://raw.githubusercontent.com/api-evangelist/stoplight/main/json-schema/stoplight-spectral-ruleset-schema.json)
- [Spectral rules](https://raw.githubusercontent.com/api-evangelist/stoplight/main/rules/stoplight-jsonschema-spectral-rules.yml)

## Docs

- [Stoplight Documentation](https://docs.stoplight.io/docs/platform/vrjs3xapm31b7-stoplight-documentation)
- [Prism Overview](https://docs.stoplight.io/docs/prism/674b27b261c3c-prism-overview)
- [Spectral Overview](https://docs.stoplight.io/docs/spectral/674b27b261c3c-overview)
- [Elements Introduction](https://docs.stoplight.io/docs/elements/d6a8ba3f3c186-stoplight-elements)
- [Design Editor](https://docs.stoplight.io/docs/platform/16c3ca3b09855-design-editor-overview)
- [Style Guides](https://docs.stoplight.io/docs/platform/71b92b2b5e388-style-guide-overview)
- [Work with Mock Servers](https://docs.stoplight.io/docs/platform/336b74db38c50-work-with-mock-servers)
- [Publish with the Stoplight CLI](https://docs.stoplight.io/docs/platform/f76c84240244f-publish-with-the-stoplight-cli)
- [Single Sign-On](https://docs.stoplight.io/docs/platform/692808d0afabb-single-sign-on)
- [Prism error registry](https://docs.stoplight.io/docs/prism/cfa6f7191e544-errors)
- [Spectral CLI](https://docs.stoplight.io/docs/spectral/9ffa04e052cc1-spectral-cli)
- [Elements configuration options](https://docs.stoplight.io/docs/elements/b074dc47b2826-elements-configuration-options)

## Artifacts

- [Packages / SDKs](https://raw.githubusercontent.com/api-evangelist/stoplight/main/packages/stoplight-packages.yml): 10 first-party npm packages, versions and publish dates.
- [CLI surface](https://raw.githubusercontent.com/api-evangelist/stoplight/main/cli/stoplight-cli.yml): Stoplight CLI, Spectral CLI, Prism CLI.
- [Embedded components](https://raw.githubusercontent.com/api-evangelist/stoplight/main/components/stoplight-components.yml): Elements and Elements Dev Portal.
- [Authentication](https://raw.githubusercontent.com/api-evangelist/stoplight/main/authentication/stoplight-authentication.yml)
- [Conventions and reversibility](https://raw.githubusercontent.com/api-evangelist/stoplight/main/conventions/stoplight-conventions.yml)
- [Error catalog (v1 contract)](https://raw.githubusercontent.com/api-evangelist/stoplight/main/errors/stoplight-problem-types.yml)
- [Prism error code registry](https://raw.githubusercontent.com/api-evangelist/stoplight/main/errors/stoplight-error-codes.yml)
- [Lifecycle](https://raw.githubusercontent.com/api-evangelist/stoplight/main/lifecycle/stoplight-lifecycle.yml)
- [Changelog](https://raw.githubusercontent.com/api-evangelist/stoplight/main/changelog/stoplight-changelog.yml)
- [Conformance](https://raw.githubusercontent.com/api-evangelist/stoplight/main/conformance/stoplight-conformance.yml)
- [Sandbox and mock servers](https://raw.githubusercontent.com/api-evangelist/stoplight/main/sandbox/stoplight-sandbox.yml)
- [Data model](https://raw.githubusercontent.com/api-evangelist/stoplight/main/data-model/stoplight-data-model.yml)
- [Plans and pricing](https://raw.githubusercontent.com/api-evangelist/stoplight/main/plans/stoplight-plans-pricing.yml)
- [Rate limits](https://raw.githubusercontent.com/api-evangelist/stoplight/main/rate-limits/stoplight-rate-limits.yml)
- [Domain security](https://raw.githubusercontent.com/api-evangelist/stoplight/main/security/stoplight-domain-security.yml)
- [Trust center](https://raw.githubusercontent.com/api-evangelist/stoplight/main/security/stoplight-trust-center.yml)
- [Vulnerability disclosure](https://raw.githubusercontent.com/api-evangelist/stoplight/main/security/stoplight-vulnerability-disclosure.yml)
- [Agent skills](https://raw.githubusercontent.com/api-evangelist/stoplight/main/skills/_index.yml)
- [.well-known probe](https://raw.githubusercontent.com/api-evangelist/stoplight/main/well-known/stoplight-well-known.yml): all paths 404.

## Commercial

- [Pricing](https://stoplight.io/pricing): Free, Basic $44/mo annual, Startup $113/mo annual, Pro Team $362/mo annual, Enterprise custom. 14-day free trial on paid tiers.
- [Sign up](https://stoplight.io/welcome)
- [Terms of Service](https://stoplight.io/terms)
- [Privacy Policy](https://stoplight.io/privacy)
- [Status](https://stoplight.status.smartbear.com/)
- [Support](https://support.stoplight.io/)
- [Security practices](https://stoplight.io/security-practices)

## Optional

- [Blog](https://blog.stoplight.io/)
- [GitHub organization](https://github.com/stoplightio)
- [Open source](https://stoplight.io/open-source)
- [SmartBear API Hub](https://smartbear.com/api-hub/)
- [SmartBear security and vulnerability reporting](https://smartbear.com/security/)
- [SmartBear Trust Center](https://trust.smartbear.com/)

## Not available

- No MCP server. SmartBear's official MCP server (@smartbear/mcp) covers Swagger/API Hub, BugSnag, Zephyr and others — it exposes no Stoplight tools.
- No A2A agent card on any host (/.well-known/agent-card.json and /.well-known/agent.json both 404).
- No AsyncAPI or webhook surface for the Stoplight platform.
- No GraphQL, gRPC/Protobuf or SOAP/WSDL contract.
- No OAuth 2.0 or OpenID Connect for API access; no published OAuth scopes.
- No published rate limits, no security.txt, no public roadmap, no platform changelog.