MCP SERVER · OFFICIAL PROJECTPull a library's current documentation and code examples into the conversation, so an answer about a framework matches the version you are on.
The plugin Microsoft Agent Skills includes connection settings for this server.
LABSCO SUMMARY
Two calls stand between a question and the current documentation: name to library ID, then ID plus question to docs and examples. The second call will not take a bare name, and that refusal is what keeps the answer pinned to a specific library rather than a plausible one.
A documentation lookup in two steps: resolve-library-id turns a package name into a Context7 library ID, and query-docs fetches documentation and code examples for that ID against your question. The same index is reachable two ways — as an MCP server, or as a ctx7 CLI that a skill drives without MCP at all.
resolve-library-idquery-docs/vercel/next.js or /mongodb/docs and the docs load directlyctx7 library <YOUR_LIBRARY_NAME> <YOUR_QUERY> to find it, ctx7 docs <YOUR_LIBRARY_ID> <YOUR_QUERY> to read itNothing installed on the fastest path: point your client at https://mcp.context7.com/mcp and pass a key as Authorization: Bearer <YOUR_API_KEY>. The key is free from the Context7 dashboard and optional, but it raises the rate limit. npx ctx7 setup does the whole thing — OAuth, key generation, and installing either the skill or the MCP server — and needs Node.js 18 or newer. The local package is @upstash/context7-mcp over stdio, reading CONTEXT7_API_KEY. Library documentation is community-contributed, so accuracy varies by project.
One command — npx -y @upstash/context7-mcp
USE CASES
Resolve the library, then ask the documentation your actual question. What comes back is the current API and its examples, so the code compiles instead of looking plausible.
For anything released or reworked recently, the answer has to come from the docs rather than from training. This is the path that fetches them mid-conversation.
A bare product name often maps to several libraries. Resolving it first returns the candidates, so the question gets pointed at the right one before any documentation is read.
Name the version in the prompt and it is matched when the docs are fetched. Half of framework advice is right for some version and wrong for yours, and this is what settles which.
Give the Context7 ID directly in the prompt — /supabase/supabase — and the matching step is skipped entirely. One call instead of two, and no risk of resolving to a look-alike.
Counted once with only startup setup. Other versions, modes or optional credentials may expose a different list.
query-docsRetrieves and queries up-to-date documentation and code examples from Context7 for any programming library or framework.
You must call 'Resolve Context7 Library ID' tool first to obtain the exact Context7-compatible library ID required to use this tool, UNLESS the user explicitly provides a library ID in the format '/org/project' or '/org/project/version' in their query.
Do not call this tool more than 3 times per question.
resolve-library-idResolves a package/product name to a Context7-compatible library ID and returns matching libraries.
You MUST call this function before 'Query Documentation' tool to obtain a valid Context7-compatible library ID UNLESS the user explicitly provides a library ID in the format '/org/project' or '/org/project/version' in their query.
Each result includes:
For best results, select libraries based on name match, source reputation, snippet coverage, benchmark score, and relevance to your use case.
Selection Process:
Response Format:
For ambiguous queries, request clarification before proceeding with a best-guess match.
IMPORTANT: Do not call this tool more than 3 times per question. If you cannot find what you need after 3 calls, use the best result you have.
BEFORE YOU INSTALL
2 tools when we connected.
npx on PATH
CONTEXT COST
Rated by the size of the 2 tool definitions that ride along on every turn, not by how many there are
INSTALLATION
Add the block to your client, or run the command directly.
{
"mcpServers": {
"context7-mcp": {
"command": "npx",
"args": [
"-y",
"@upstash/context7-mcp"
]
}
}
}npx -y @upstash/context7-mcphttps://mcp.context7.com/mcpAdd this hosted endpoint to your MCP client.
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