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Flight Search

Official registry Developer tools

Search Google Flights through SerpApi: one-way and round-trip flights by IATA airport code.

Source code Documentation

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

PYPI package mcp-flight-search
Claude Code 
claude mcp add flight-search -e 'SERP_API_KEY=<your serp_api_key>' -- uvx mcp-flight-search==0.3.0
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "flight-search": {
            "command": "uvx",
            "args": [
                "mcp-flight-search==0.3.0"
            ],
            "env": {
                "SERP_API_KEY": "<your serp_api_key>"
            }
        }
    }
}

Environment variables

  • SERP_API_KEY required secret Your SerpApi key (serpapi.com)

Documentation

From the project's README on GitHub, refreshed weekly. Links open on GitHub.

Contents
  1. MCP Flight Search
  2. Requirements
  3. Use it from an MCP client
  4. Run it yourself
  5. Tools
  6. Development
  7. License

An MCP server that searches Google Flights through SerpApi, for Claude, Cursor and other MCP clients. One-way and round-trip searches by IATA airport code, with prices, durations, stops and times.

Requirements

  • Python 3.10 or later (or uv)
  • A SerpApi key in SERP_API_KEY (serpapi.com has a free tier)

Use it from an MCP client

Add it to your client's MCP configuration (Claude Desktop, Claude Code, Cursor, ...):

{
  "mcpServers": {
    "flight-search": {
      "command": "uvx",
      "args": ["mcp-flight-search"],
      "env": { "SERP_API_KEY": "your-serpapi-key" }
    }
  }
}

Or install it with pip install mcp-flight-search and use "command": "mcp-flight-search".

Run it yourself

export SERP_API_KEY="your-serpapi-key"
mcp-flight-search                                    # stdio (default)
mcp-flight-search --connection_type http --port 3001 # Streamable HTTP at http://127.0.0.1:3001/mcp

LOG_LEVEL=DEBUG shows more detail on stderr. The API key is never logged.

With Docker:

docker build -t mcp-flight-search .
docker run -i --rm -e SERP_API_KEY=your-serpapi-key mcp-flight-search

Tools

ToolWhat it does
search_flights_toolFlights between two airports. origin, destination: IATA codes such as ATL, LAX. outbound_date: YYYY-MM-DD. return_date (optional): YYYY-MM-DD for a round trip. Returns structured results: airline, price (USD), duration, stops, departure, arrival, cabin class.
server_statusChecks the server is running and reports its version.

Development

uv sync
uv run pytest
uv run ruff check .

License

MIT

Frequently asked questions

What is Flight Search?

Search Google Flights through SerpApi: one-way and round-trip flights by IATA airport code.

How do I install Flight Search?

It runs on your machine. In Claude Code: claude mcp add flight-search -e 'SERP_API_KEY=<your serp_api_key>' -- uvx mcp-flight-search==0.3.0. For other clients, paste the JSON configuration from this page into their MCP settings.

Does Flight Search need an API key?

Yes. It expects SERP_API_KEY, which you set in its configuration.

Is Flight Search open source?

Yes. Its code is on GitHub under the MIT license.

Who maintains Flight Search?

It is published by arjunprabhulal. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.