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JSR MCP

by wyattjoh
GitHub
TypeScript
MIT License
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JSR MCP

A Deno monorepo containing packages for JSR (JavaScript Registry) access:

Features

  • Search packages across the JSR registry

  • Get package details, versions, and dependencies

  • Manage scopes and package publishing

  • Handle member invitations and permissions

  • Access registry statistics and metadata

  • Full authentication support for write operations

Requirements

  • Deno 2.x or later

  • Network access to JSR API

  • JSR API token for authenticated operations (optional)

Packages

@wyattjoh/jsr

Core library for accessing JSR API:

deno add @wyattjoh/jsr
import { getPackage, searchPackages } from "@wyattjoh/jsr"; const results = await searchPackages({ query: "react" }); const pkg = await getPackage("deno", "std");

See full documentation

@wyattjoh/jsr-mcp

MCP server for LLM integration:

# Run directly from JSR deno run --allow-net --allow-env jsr:@wyattjoh/jsr-mcp # Or install globally deno install --global --allow-net --allow-env -n jsr-mcp jsr:@wyattjoh/jsr-mcp

For Claude Desktop app integration, add this to your claude_desktop_config.json:

{ "mcpServers": { "jsr": { "command": "deno", "args": [ "run", "--allow-net", "--allow-env", "jsr:@wyattjoh/jsr-mcp" ], "env": { "JSR_API_TOKEN": "your-api-token-here" } } } }

Option 2: From Source

  1. Clone this repository

  2. Install dependencies:

    deno cache packages/*/mod.ts

  3. Run the server:

    deno run --allow-net --allow-env packages/jsr-mcp/mod.ts

Available Tools

The MCP server provides 40 tools for comprehensive JSR access:

Package Operations

  • jsr_search_packages - Search for packages

  • jsr_get_package - Get package details

  • jsr_get_package_version - Get specific version details

  • jsr_list_package_versions - List all versions

  • jsr_get_package_metadata - Get package metadata

  • jsr_get_package_dependencies - Get dependencies

  • jsr_get_package_score - Get package quality score

  • jsr_get_package_dependents - Find dependent packages

  • jsr_create_package - Create new package (requires auth)

  • jsr_update_package - Update package (requires auth)

  • jsr_delete_package - Delete package (requires auth)

Package Version Management

  • jsr_create_package_version - Upload new version (requires auth)

  • jsr_update_package_version - Update version, e.g., yank (requires auth)

Scope Management

  • jsr_get_scope - Get scope details

  • jsr_list_scope_packages - List packages in a scope

  • jsr_create_scope - Create new scope (requires auth)

  • jsr_update_scope - Update scope settings (requires auth)

  • jsr_delete_scope - Delete scope (requires auth)

Member Management

  • jsr_list_scope_members - List scope members

  • jsr_add_scope_member - Invite member (requires auth)

  • jsr_update_scope_member - Update member role (requires auth)

  • jsr_remove_scope_member - Remove member (requires auth)

  • jsr_list_scope_invites - List pending invites

  • jsr_delete_scope_invite - Delete scope invite (requires auth)

  • jsr_accept_scope_invite - Accept invite (requires auth)

  • jsr_decline_scope_invite - Decline invite (requires auth)

User Operations

  • jsr_get_current_user - Get authenticated user

  • jsr_get_current_user_scopes - Get user's scopes

  • jsr_get_current_user_scope_member - Get user's membership in a scope

  • jsr_get_current_user_invites - Get user's pending invites

  • jsr_get_user - Get user details

  • jsr_get_user_scopes - Get user's scopes

Registry Operations

  • jsr_list_packages - List all registry packages

  • jsr_get_stats - Get registry statistics

Authorization (OAuth)

  • jsr_create_authorization - Start authorization flow (requires auth)

  • jsr_get_authorization_details - Get authorization details

  • jsr_approve_authorization - Approve authorization (requires auth)

  • jsr_deny_authorization - Deny authorization (requires auth)

  • jsr_exchange_authorization - Exchange code for token (requires auth)

Publishing

  • jsr_get_publishing_task - Get publishing task status

Example Usage

// Search for packages jsr_search_packages({ query: "react", limit: 10 }); // Get package details jsr_get_package({ scope: "deno", name: "std" }); // List versions with pagination jsr_list_package_versions({ scope: "deno", name: "std", limit: 20, page: 1, }); // Get dependencies for a specific version jsr_get_package_dependencies({ scope: "deno", name: "std", version: "1.0.0", }); // Create a new scope (requires authentication) jsr_create_scope({ scope: "my-org", description: "My organization's packages", });

Security Notes

  • Read operations do not require authentication

  • Write operations require a valid JSR API token

  • The server only accesses the JSR API endpoints

  • No local file system access beyond reading environment variables

Development

This is a Deno workspace monorepo. All commands run from the root affect all packages.

# Clone the repository git clone https://github.com/wyattjoh/jsr-mcp.git cd jsr-mcp # Cache dependencies deno cache packages/*/mod.ts # Format all code deno fmt # Lint all packages deno lint # Type check all packages deno check packages/jsr/mod.ts packages/jsr-mcp/mod.ts # Run tests deno test --allow-net packages/ # Run MCP server locally (with watch mode) deno run --allow-read --allow-write --allow-env --allow-run --allow-net --watch packages/jsr-mcp/mod.ts # Run MCP server in production deno run --allow-read --allow-write --allow-env --allow-run --allow-net packages/jsr-mcp/mod.ts # Build binary cd packages/jsr-mcp deno compile --allow-read --allow-write --allow-env --allow-run --allow-net --output=jsr-mcp mod.ts # Publish packages (CI/CD) deno publish

Working on Individual Packages

# Work on @wyattjoh/jsr cd packages/jsr deno test --allow-net # Work on @wyattjoh/jsr-mcp cd packages/jsr-mcp deno run --allow-net --allow-env mod.ts

License

MIT

This server cannot be installed

-
security - not tested
A
license - permissive license
-
quality - not tested

How are these scores calculated?

remote-capable server

The server can be hosted and run remotely because it primarily relies on remote services or has no dependency on the local environment.

Model Context Protocol server for the JSR (JavaScript Registry)

  1. Features
    1. Requirements
      1. Packages
        1. @wyattjoh/jsr
        2. @wyattjoh/jsr-mcp
        3. Option 2: From Source
        4. Available Tools
        5. Example Usage
      2. Security Notes
        1. Development
          1. Working on Individual Packages
        2. License

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