Fli Google Flights MCP Server

Content

Fli is a Google Flights MCP server, CLI, and Python library. It lets Claude and other MCP clients search one-way and round-trip flights, flexible travel dates, airports, and booking options using a reverse engineered Google Flights API workflow.

Use it when an agent needs structured flight-search context before a human checks current fare details. Fli can return flight options, prices, currencies, legs, cabin filters, airline and alliance filters, layover constraints, airport search results, Google Flights deep links, and vendor booking options when available.

Source Review

• https://github.com/punitarani/fli
• https://github.com/punitarani/fli/blob/main/README.md
• https://pypi.org/project/flights/
• https://github.com/punitarani/fli/blob/main/LICENSE.txt
• https://github.com/punitarani/fli/blob/main/pyproject.toml
• https://github.com/punitarani/fli/blob/main/docs/guides/mcp.md
• https://github.com/punitarani/fli/blob/main/fli/mcp/server.py
• https://github.com/punitarani/fli/blob/main/fli/mcp/_entry.py
• https://github.com/punitarani/fli/blob/main/fli/search/client.py
• https://github.com/punitarani/fli/blob/main/fli/search/flights.py

These sources were reviewed on 2026-06-06. Prefer the live repository, README, PyPI package page, license, Python package metadata, MCP guide, MCP server, MCP entrypoint wrapper, search client, and flight-search implementation for current installation, tool, and request behavior.

Features

• Search flights by origin, destination, departure date, return date, cabin, stops, airlines, alliances, layover bounds, currency, language, country, and passenger count.
• Search flexible travel dates across a date range.
• Retrieve booking options for a selected itinerary when Google surfaces vendor data.
• Search airport codes and names.
• Generate Google Flights deep links for result review.
• Run over stdio with fli-mcp or Streamable HTTP with fli-mcp-http.
• Configure defaults with FLI_MCP_ environment variables for passenger count, currency, cabin class, sorting, departure window, and result limits.

Installation

Install the package with MCP extras:

pipx install "flights[mcp]"

Add it to Claude Code:

claude mcp add fli -- fli-mcp

For JSON-based MCP clients, use:

{
  "mcpServers": {
    "fli": {
      "command": "fli-mcp",
      "args": []
    }
  }
}

Restart the MCP client after adding the server.

Use Cases

• Ask Claude to compare one-way or round-trip options for a route and date.
• Search flexible date ranges for cheaper travel windows.
• Filter by cabin class, maximum stops, departure window, airline, alliance, or layover duration.
• Resolve airport codes before searching.
• Retrieve booking links and vendor options for a flight found by search_flights.
• Generate a structured shortlist that a traveler can verify in Google Flights or with an airline.

Safety and Privacy

Fli is not an official Google Flights API. It relies on reverse engineered API behavior, browser-like request handling, rate limiting, and retries. Review Google Flights terms and keep automated search volume reasonable.

Flight information changes quickly. Prices, seats, schedules, baggage fees, fare classes, booking links, and vendor availability must be verified in Google Flights, the airline site, or the booking provider before a traveler acts.

Searches can disclose travel intent. Keep sensitive trips, traveler identities, loyalty accounts, passport data, payment details, and private booking confirmations out of prompts and MCP configuration.

Duplicate Check

No Fli entry, punitarani/fli, Google Flights MCP entry, flights package entry, or matching source URL was found in content/mcp.