Grep by Vercel MCP server

Endpoint: https://mcp.grep.app · Authentication: No auth

Searches code across about a million public GitHub repositories by literal string or regular expression, with language, repository, and path filters. No authentication is required.

Test it live Run the release-readiness report

How do I authenticate?

Add the endpoint directly in your client. The catalog records no authentication requirement; no OAuth sign-in or API key is configured in this setup. The live server may change.

Authentication and connection guide

Connection specification

Remote endpoint: https://mcp.grep.app
Live-validated endpoint: https://mcp.grep.app/
Browser access: Not yet measured
Declared MCP transport: Streamable HTTP
Live-validated MCP transport: Streamable HTTP — Observed by the latest catalog validation
Declared authentication: No authentication
Detected authentication: No authentication detected or retained from publisher evidence
Protocol lifecycle: Stateful MCP · 2025-06-18
Category: Search

Product documentation · Official listing documentation

More Search MCP servers · Browse all MCP servers · Test this endpoint in the MCP Playground

Authorization setup

No app registration needed

This catalog entry does not require authorization or provider app registration.

Connect it

Live-validated endpoint: https://mcp.grep.app/ · Streamable HTTP. No authentication is required by the catalog listing.

Agent prompt for Claude Code or Codex

Add the Grep by Vercel MCP server to my MCP client configuration and verify that it works.

What it is: Searches code across about a million public GitHub repositories by literal string or regular expression, with language, repository, and path filters. No authentication is required.
Server URL: https://mcp.grep.app/
Transport: Streamable HTTP (remote MCP server, no local install).
Authentication: none. The server accepts connections without credentials.
Tools (1, as last observed by mcptest): searchGitHub.
Reference: https://mcptest.io/servers/grep/

Steps:
1. Work out which MCP client I use (Claude Code, Codex, Cursor, VS Code or another) and add the server under the name "grep" in that client's MCP configuration, user scope unless I ask otherwise.
   Claude Code: claude mcp add --transport http --scope user 'grep' 'https://mcp.grep.app/'
   Codex: codex mcp add 'grep' --url 'https://mcp.grep.app/'
   Other clients: use the setup for that client on the reference page.
2. Never write a credential value into a file that could be committed; reference an environment variable or the client's secret store, and ask me for any value you need.
3. Verify: connect to the server and call tools/list. Confirm the tools above are listed, and report any sign-in step I still have to complete.

Claude Code setup

Run in a terminal. This user-scoped entry is available across projects.

claude mcp add --transport http --scope user 'grep' 'https://mcp.grep.app/'

Codex CLI setup

Run in a terminal; Codex stores the entry in ~/.codex/config.toml.

codex mcp add 'grep' --url 'https://mcp.grep.app/'

Cursor setup

Add to .cursor/mcp.json for this project, or ~/.cursor/mcp.json for all projects.

{
  "mcpServers": {
    "grep": {
      "url": "https://mcp.grep.app/"
    }
  }
}

VS Code setup

Add to .vscode/mcp.json, or run “MCP: Open User Configuration” for a private user-level entry.

{
  "servers": {
    "grep": {
      "type": "http",
      "url": "https://mcp.grep.app/"
    }
  }
}

Claude setup

Add the endpoint above in Claude:

Customize > Connectors > Add custom connector
Team/Enterprise: Organization settings > Connectors > Add > Custom > Web

Claude Desktop setup

Add the endpoint above in Claude Desktop:

Remote: Customize > Connectors (same as claude.ai)
Local: Settings > Developer > Edit Config, or Settings > Extensions for .mcpb files
~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows), local servers only

ChatGPT setup

Add the endpoint above in ChatGPT:

ChatGPT web: Plugins > Add custom MCP server, then configure authentication and accept the risk warning

Windsurf setup

Add the endpoint above in Windsurf:

~/.config/devin/mcp_config.json (%APPDATA%\devin\mcp_config.json on Windows), serverUrl or url
Cascade panel > ... > MCPs > Open MCP config file

Gemini CLI setup

Add the endpoint above in Gemini CLI:

gemini mcp add --transport http <name> <url>
~/.gemini/settings.json (user) or .gemini/settings.json (project), mcpServers

MCP SDK setup

Add the endpoint above in MCP SDK:

Programmatic: new Client(...).connect(new StreamableHTTPClientTransport(url))

Client compatibility

Client	Status	Why
Claude Code	Supported	Claude Code supports Streamable HTTP servers and servers without authentication.
Codex	Partial	Codex's documentation does not state support for servers without authentication.
Cursor	Supported	Cursor supports Streamable HTTP servers and servers without authentication.
VS Code	Supported	VS Code supports Streamable HTTP servers and servers without authentication.
Claude	Supported	Claude supports Streamable HTTP servers and servers without authentication.
Claude Desktop	Supported	Claude Desktop supports Streamable HTTP servers and servers without authentication.
ChatGPT	Partial	Stateful routing needs operational care: ChatGPT can preserve MCP sessions, but the deployment must route a session consistently and retain its state.
Windsurf	Partial	Windsurf's documentation does not state support for servers without authentication.
Gemini CLI	Supported	Gemini CLI supports Streamable HTTP servers and servers without authentication.
MCP SDK	Supported	MCP SDK supports Streamable HTTP servers and servers without authentication.

Computed from this server's validated transport, protocol and authentication against documented client support. Checks the catalog has not observed are not counted.

Similar servers

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Tavily — Tavily search, extract, crawl, and map tools for real-time web research. Clients sign in with OAuth, or append a Tavily API key as the tavilyApiKey query parameter. OAuth 2.1
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Parallel Search — Searches the web and fetches pages as compact markdown through Parallel's Search and Extract APIs. Works anonymously on a free tier; a Parallel API key as a bearer token raises the limits. No authentication
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Guides for this server

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Latest validation evidence

Validation status: Online when last tested
Validation checked at: Oct 26, 2026 at 11:06 AM
Validation detail: Negotiated stateful MCP 2025-06-18 at https://mcp.grep.app/; detected transport streamable-http; authentication none

Tool inventory

What the catalog validator observed on Oct 26, 2026 at https://mcp.grep.app/ without credentials. The live server may have changed since; connect in the Playground for the current list.

Tools provided by Grep by Vercel 1

Some details were sanitized for public display.

searchGitHubNo outputSchema
Find real-world code examples from over a million public GitHub repositories to help answer programming questions. **IMPORTANT: This tool searches for literal code patterns (like grep), not keywords. Search for actual code that would appear in files:** - ✅ Good: 'useState(', 'import React from', 'async function', '(?s)try {.*await' - ❌ Bad: 'react tutorial', 'best practices', 'how to use' **When to use this tool:** - When implementing unfamiliar APIs or libraries and need to see real usage patterns - When unsure about correct syntax, parameters, or configuration for a specific library - When l
Input language?: array, matchCase?: boolean, matchWholeWords?: boolean, path?: string, query: string, repo?: string, useRegexp?: boolean
- language?: arrayoptional
  Filter by programming language. Examples: ['TypeScript', 'TSX'], ['JavaScript'], ['Python'], ['Java'], ['C#'], ['Markdown'], ['YAML']
- matchCase?: booleanoptional
  Whether the search should be case sensitive
- matchWholeWords?: booleanoptional
  Whether to match whole words only
- path?: stringoptional
  Filter by file path. Examples: 'src/components/Button.tsx', 'README.md'. Can match partial paths, for example '/route.ts' will find route.ts files at any level.
- query: stringrequired
  The literal code pattern to search for (e.g., 'useState(', 'export function'). Use actual code that would appear in files, not keywords or questions.
- repo?: stringoptional
  Filter by repository. Examples: 'facebook/react', 'microsoft/vscode', 'vercel/ai'. Can match partial names, for example 'vercel/' will find repositories in the vercel org.
- useRegexp?: booleanoptional
  Whether to interpret the query as a regular expression