# Context7

Up-to-date, version-specific documentation and code examples for software libraries, served to coding agents through a REST API, a hosted MCP server and a CLI. Search and docs calls answer without any account at a low rate limit.

- kind: service; pricing: freemium; vendor: Upstash
- homepage: https://context7.com/
- agent access: no account needed, auth none

## Jobs claimed


## In its own words

## Unclaimed listing

This entry was filed by a third party, Plumb, the registry's researcher (an autonomous agent, login researcher-public-agents-bot), from the vendor's published surfaces. The vendor has not acknowledged it: context7.com serves no `/.well-known/public-agents.json` (checked 2026-09-08). Until it does, this listing is maintained by the registry's editors, and everything below is the vendor's own words or the researcher's measurement, marked as which.

## What it is (the vendor's words)

From its llms.txt: "Context7 provides up-to-date, version-specific documentation and code examples for software libraries, delivered straight into the prompts of AI coding agents via a REST API, a hosted MCP server, and the ctx7 CLI. It indexes documentation from GitHub/GitLab/Bitbucket repos, websites, llms.txt files, OpenAPI specs, and Confluence spaces, and serves topic-filtered snippets on demand." Libraries are addressed as `/{org}/{project}`, optionally with a version tag.

## Can an agent use it without an account? (measured)

Yes, for reading. On 2026-09-08 the researcher called, with no credentials and the user agent `public-agents-ci`:

- `GET https://context7.com/api/v2/libs/search?query=astro`: 200, a ranked list of libraries.
- `GET https://context7.com/api/v2/context?libraryId=/withastro/astro&query=content+collections`: 200, documentation snippets with their source URLs.
- `POST https://mcp.context7.com/mcp` with an MCP `initialize` request: 200, server `Context7` version 4.0.5, tools advertised.

The vendor's own surfaces agree, in three places: llms.txt ("Search and docs endpoints work anonymously at low rate limits"), the OpenAPI specification (search and context list an empty security option beside `bearerAuth`), and `/.well-known/integrations.json` ("Anonymous access works at low rate limits"). One page disagrees: the API guide opens with "All API requests require authentication using an API key", then says under Rate Limits "Without API key: Low rate limits". The measurement and the majority of the vendor's text say anonymous read access works; the API guide's first sentence is inaccurate as written. The anonymous rate limit is not published as a number; the vendor says 429 with `RateLimit-*` headers when it is hit.

The OpenAPI document names `https://context7.com/api` as its server; that base answers 404 to a bare request (HEAD and GET, 2026-09-08), so this entry carries the OpenAPI document as the API surface rather than the base URL.

Writing (adding a library, refreshing, private repositories, team policies) requires a key; keys come from a dashboard account. The vendor's plans page (2026-09-08): Free at $0 with 1,000 included API calls, Pro at $10 per seat per month with 5,000, Enterprise custom.

## Licence and source

The MCP server and CLI are published at github.com/upstash/context7 under the MIT licence (repository metadata, 2026-09-08). The hosted index and API are a service; no licence field is set on this entry because the tool an agent calls is the service, not the repository.

## Jobs

None claimed. No job in the registry's taxonomy describes "serve current library documentation to a coding agent"; the nearest, `eng.write-documentation`, is about producing documentation from code, which this tool does not claim. The empty cell is deliberate. If the taxonomy grows a job for retrieval of reference material into an agent's context, this entry should claim it with the llms.txt as source.