An MCP server that provides LLMs with efficient access to package documentation across multiple programming languages
An MCP (Model Context Protocol) server that provides LLMs with efficient access to package documentation across multiple programming languages and language server protocol (LSP) capabilities.
Note: I am not actively maintaining the codebase at present. While it doesn’t provide access to private package documentation - the Context7 MCP server and service meets my needs which are mostly for public package documentation. I personally use Context7 via my mcp-devtools MCP server which is actively maintained.
Multi-Language Support:
Smart Documentation Parsing:
Advanced Search Features:
Language Server Protocol (LSP) Support:
Performance Optimised:
Note: I do not recommend using npx -y to run your MCP servers in production as you’re esentially trusting whatever package you’re downloading off the internet at that moment in time. I highly recommend cloning the repository locally or building into a container image.
npx -y mcp-package-docs
{
"mcpServers": {
"package-docs": {
"command": "npx",
"args": ["-y", "mcp-package-docs"],
"env": {
"ENABLE_LSP": "true" // Optional: Enable Language Server Protocol support
}
}
}
}
typescript-language-server --stdiovscode-html-language-server --stdiovscode-css-language-server --stdiovscode-json-language-server --stdioYou can override these defaults if needed:
{
"mcpServers": {
"package-docs": {
"command": "npx",
"args": ["-y", "mcp-package-docs"],
"env": {
"ENABLE_LSP": "true",
"TYPESCRIPT_SERVER": "{\"command\":\"/custom/path/typescript-language-server\",\"args\":[\"--stdio\"]}"
}
}
}
}
Fetches Go package documentation
{
"name": "describe_go_package",
"arguments": {
"package": "encoding/json", // required
"symbol": "Marshal" // optional
}
}
Fetches Python package documentation
{
"name": "describe_python_package",
"arguments": {
"package": "requests", // required
"symbol": "get" // optional
}
}
Fetches Rust crate documentation from crates.io and docs.rs
{
"name": "describe_rust_package",
"arguments": {
"package": "serde", // required: crate name
"version": "1.0.219" // optional: specific version
}
}
Search within package documentation
{
"name": "search_package_docs",
"arguments": {
"package": "requests", // required: package name
"query": "authentication", // required: search query
"language": "python", // required: "go", "python", "npm", "swift", or "rust"
"fuzzy": true // optional: enable fuzzy matching (default: true)
}
}
Fetches NPM package documentation from both public and private registries. Automatically uses the appropriate registry based on your .npmrc configuration.
{
"name": "describe_npm_package",
"arguments": {
"package": "axios", // required - supports both scoped (@org/pkg) and unscoped packages
"version": "1.6.0" // optional
}
}
The tool reads your ~/.npmrc file to determine the correct registry for each package:
Example .npmrc configurations:
registry=https://nexus.mycompany.com/repository/npm-group/
@mycompany:registry=https://nexus.mycompany.com/repository/npm-private/
@mycompany-ct:registry=https://npm.pkg.github.com/
When LSP support is enabled, the following additional tools become available:
Get hover information for a position in a document
{
"name": "get_hover",
"arguments": {
"languageId": "typescript", // required: language identifier (e.g., "typescript", "javascript")
"filePath": "src/index.ts", // required: path to the source file
"content": "const x = 1;", // required: content of the file
"line": 0, // required: zero-based line number
"character": 6, // required: zero-based character position
"projectRoot": "/path/to/project" // optional: project root directory
}
}
Get completion suggestions for a position in a document
{
"name": "get_completions",
"arguments": {
"languageId": "typescript", // required: language identifier
"filePath": "src/index.ts", // required: path to the source file
"content": "const arr = []; arr.", // required: content of the file
"line": 0, // required: zero-based line number
"character": 16, // required: zero-based character position
"projectRoot": "/path/to/project" // optional: project root directory
}
}
Get diagnostic information (errors, warnings) for a document
{
"name": "get_diagnostics",
"arguments": {
"languageId": "typescript", // required: language identifier
"filePath": "src/index.ts", // required: path to the source file
"content": "const x: string = 1;", // required: content of the file
"projectRoot": "/path/to/project" // optional: project root directory
}
}
// Looking up Go documentation
const goDocResult = await use_mcp_tool({
server_name: "package-docs",
tool_name: "describe_go_package",
arguments: {
package: "encoding/json",
symbol: "Marshal"
}
});
// Looking up Python documentation
const pythonDocResult = await use_mcp_tool({
server_name: "package-docs",
tool_name: "describe_python_package",
arguments: {
package: "requests",
symbol: "post"
}
});
// Looking up Rust documentation
const rustDocResult = await use_mcp_tool({
server_name: "package-docs",
tool_name: "describe_rust_package",
arguments: {
package: "serde"
}
});
// Searching within documentation
const searchResult = await use_mcp_tool({
server_name: "package-docs",
tool_name: "search_package_docs",
arguments: {
package: "serde",
query: "serialize",
language: "rust",
fuzzy: true
}
});
// Using LSP for hover information (when LSP is enabled)
const hoverResult = await use_mcp_tool({
server_name: "package-docs",
tool_name: "get_hover",
arguments: {
languageId: "typescript",
filePath: "src/index.ts",
content: "const axios = require('axios');\naxios.get",
line: 1,
character: 7
}
});
npm install -g typescript-language-server typescriptnpm install -g vscode-langservers-extracted## Install dependencies
npm i
## Build
npm run build
## Watch mode
npm run watch
git checkout -b feature/amazing-feature)git commit -m 'Add some amazing feature')git push origin feature/amazing-feature)This project is licensed under the MIT License - see the LICENSE{:target=“_blank”} file for details.
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