Context7

Catalog name context7. A remote MCP server that hands the agent a library’s current documentation.

What it’s for

A model’s knowledge of a fast-moving library is older than your container. Ask it about Astro’s content collections or Playwright’s config and you may get an API that was renamed two releases ago, written confidently. Context7 closes that gap: the agent looks the library up before it writes against it, and gets versioned documentation from the source.

It serves two tools, resolve-library-id and query-docs: first find the library, then ask it something.

Add it

At init, or to an existing workbench:

monoceros init acme --with-mcp-servers=context7

monoceros add-mcp-server acme context7

Then fill the key and apply:

monoceros apply acme

The API key

Create one at context7.com and put it in your env file. add-mcp-server seeds the empty key for you, so you only fill the value:

acme.yml
acme.env

mcpServers:
  - name: context7
    options:
      apiKey: ${CONTEXT7_API_KEY}

CONTEXT7_API_KEY=

For one workbench put it in acme.env; to share it across every workbench, put it in the global monoceros-config.env instead.

The key is required. The public endpoint is heavily rate limited without one, and a server that works for the first few questions and then stops is worse than one that never started, so apply refuses an empty key and names the file to fill.

Options

Option	Default	Description
`apiKey`	(empty)	Your Context7 API key. Resolved from the env, never the yml.

Where it runs

Remote (http). The request leaves the container and your key goes with it, so this one does not stay behind the container boundary. What the agent sends is whatever it decided to ask, which is up to the agent rather than to Monoceros.

Verify it

monoceros check acme

MCP servers
  context7 → Claude Code, OpenCode, Rovo Dev
      tools: resolve-library-id, query-docs

If those two tool names appear, the server is registered with every agent and answering. Whether a given model then reaches for it is up to the model: some prefer a web fetch even with the tool available.

Remove it

monoceros remove-mcp-server acme context7

The registration disappears from each agent on the next apply. The key stays in your env file, so adding it back later needs no second trip to context7.com.