Community list of transit APIs, apps, datasets, research, and software 🚌🌟🚋🌟🚂

Canonical GTFS Validator project for schedule (static) files.

EN: Browser-based open-source GTFS validator & feed quality analyzer; data stays on-device. TR: Tarayıcıda çalışan açık kaynak GTFS doğrulayıcı ve kalite analiz aracı; veri cihazınızda kalır. JP: ブラウザで動作するオープンソースGTFSバリデーター・品質分析ツール。データは端末内で処理されます。

GAIA-WEB is intended to offer a web interface to G.A.I.A. (GTFS Accurate Insight Analyser) that is basically a tool to verify and manipulate GTFS feeds.

GTFS Shapes Validator is a web tool that allows you to validate and fix shapes in your GTFS.

A modern TypeScript library to parse, query, and validate GTFS public-transit feeds. The validator the JS ecosystem was missing.

Browser GTFS editor & validator: validate, fix and re-export feeds end to end — grid + map Shape Studio + SQL + AI repair, on MobilityData's canonical validator.

Plain-language GTFS and GTFS-Realtime data-quality scorecards for 1,400+ US and Canadian transit feeds — runs the MobilityData validator, grades each feed, lists the top fixes, gates CI via a GitHub Action, and ships a read-only MCP server. Live at gtfsscorecard.org.