mcps / context7
✓ MCPExplorer Verified
Context7 MCP server
Up-to-date library docs, on demand.
Docsby UpstashverifiedFree
01What it is
Context7 pulls version-specific, up-to-date documentation and code examples for thousands of libraries straight into the agent's context — so it stops hallucinating APIs from stale training data.
Who it’s for: Developers tired of agents inventing outdated or non-existent APIs.
02Highlights
Current docs
Fetch real, version-matched docs and examples for the library you're using.
Fewer hallucinations
Ground code generation in the actual API, not a guess from months ago.
03Add it to your agent
Local MCP server — runs on your machine via the command below.
claude mcp add context7 -- npx -y @upstash/context7-mcp
{ "mcpServers": { "context7": { "command": "npx", "args": ["-y","@upstash/context7-mcp"] } } }
04What it can do · 2 tools
The real tool surface, each labeled by risk. Full trust breakdown on the server page.
| Tool | Risk |
|---|---|
| resolve-library-id Resolves 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:
- Library ID: Context7-compatible identifier (format: /org/project)
- Name: Library or package name
- Description: Short summary
- Code Snippets: Number of available code examples
- Source Reputation: Authority indicator (High, Medium, Low, or Unknown)
- Benchmark Score: Quality indicator (100 is the highest score)
- Versions: List of versions if available. Use one of those versions if the user provides a version in their query. The format of the version is /org/project/version.
For best results, select libraries based on name match, source reputation, snippet coverage, benchmark score, and relevance to your use case.
Selection Process:
1. Analyze the query to understand what library/package the user is looking for
2. Return the most relevant match based on:
- Name similarity to the query (exact matches prioritized)
- Description relevance to the query's intent
- Documentation coverage (prioritize libraries with higher Code Snippet counts)
- Source reputation (consider libraries with High or Medium reputation more authoritative)
- Benchmark Score: Quality indicator (100 is the highest score)
Response Format:
- Return the selected library ID in a clearly marked section
- Provide a brief explanation for why this library was chosen
- If multiple good matches exist, acknowledge this but proceed with the most relevant one
- If no good matches exist, clearly state this and suggest query refinements
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. | read |
| query-docs Retrieves 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. | read |
Get started
Set up Context7 and put it to work — Free. Or see its full verified profile.