Look up up-to-date library documentation from your AI
Coding assistants often suggest APIs that were renamed or removed after their training data was collected. Documentation servers fix this by fetching the current docs for a library, framework, or cloud service at the moment you ask, then passing the relevant sections to the model. Some index thousands of open-source projects, while others read a single vendor's reference or your own internal docs. The difference shows up as fewer invented functions and code that compiles on the first try. Ask for the version you actually use, since many projects publish docs for several releases.
Example prompts
Paste one into Claude, Cursor, or any MCP client once a matching server is installed.
Using the current Next.js docs, show me how to add a route handler that streams a response.
Look up the latest Prisma docs and write a query with a nested relation filter.
What changed in the React 19 API for forms? Use the official documentation.
MCP servers for documentation lookup
The 12 strongest of 51 matching servers. Servers that name the topic directly come first.
- 43Trust score 43 of 100, Fair
Unreal Engine API Documentation
by codeturion · Python
Accurate UE5 C++ API docs for AI agents. Prevents hallucinated signatures and includes.
Registry - 43Trust score 43 of 100, Fair
Unity API Documentation
by codeturion · Python
Accurate Unity API docs (2022/2023/6) for AI agents. Prevents hallucinated signatures.
Registry - 42Trust score 42 of 100, Fair
List and fetch official Pine Labs SDK API documentation via MCP tools.
Registry - 41Trust score 41 of 100, Fair
Documentation Search
by alyiox · Python
Local RAG MCP for markdown documentation. Retrieval only; host synthesizes answers.
Registry - 27Trust score 27 of 100, Limited
A paid remote MCP for Context7 MCP docs, built to return verdicts, receipts, usage logs, and audit-r
RegistryRemote - 73Trust score 73 of 100, Good
ITASCA MCP Server
by yusong652 · Python
MCP server for ITASCA PFC, FLAC3D, 3DEC, MPoint and MassFlow: search docs, run simulations, plot.
Registry - 71Trust score 71 of 100, Good
Exact-version library docs from your lockfile — local, offline, no rate limits.
Registry - 69Trust score 69 of 100, Good
Open-source MCP server for AI agents: web search, content extraction, and library docs.
Registry 
55Trust score 55 of 100, FairUp-to-date Docs for AI Agents.
RegistryRemote- 55Trust score 55 of 100, Fair
Scaffold VTEX IO apps, Node services and GraphQL, look up Store Framework block props, search docs
Registry - 55Trust score 55 of 100, Fair
Local-first MCP server: version-correct library docs, code map, and offline drift for your repo.
Registry - 55Trust score 55 of 100, Fair
Render HTML to PDF (html_to_pdf) plus boxpdf library docs and templates, for AI agents.
Registry
How to set it up
- Pick a server. Unreal Engine API Documentation is the strongest match. Check its tools and the API keys it needs on its page.
- Copy the config for your client. Open the install guide for Claude Desktop, Claude Code, Cursor, or VS Code, and paste the generated block into the client's config file. The client guides show where each config file lives.
- Restart and try a prompt. Restart the client so it loads the server, then paste one of the example prompts above.
Questions about documentation lookup
What is the best MCP server for documentation lookup?
Unreal Engine API Documentation ranks first here with a trust score of 43/100, followed by Unity API Documentation (43) and Pine Labs SDK API Documentation MCP Server (42). Servers that name the topic directly come first, each group ordered by the public trust score, which nobody can pay for. See the methodology for how it is calculated.
How do I set up Unreal Engine API Documentation in Claude or Cursor?
Open the install guide for Claude Desktop or Cursor, copy the generated config into the client's config file, add any API keys the server asks for, then restart the client. The client guides cover VS Code, Claude Code, Windsurf, and more.
Can I use a hosted server instead of installing one locally?
2 of the 12 servers listed here can connect remotely over HTTP, so there is nothing to run on your machine: context7docs-mcp, docfork. The rest run locally over stdio.
How many MCP servers can do this?
MCPpedia lists 51 published servers that match this use case. This page shows the 12 strongest matches; thin and duplicate listings are left out.