Catalogian turns a data link or file into a record your LLM can question. Paste a URL or drop a CSV, TSV, or JSONL file and a record comes back in seconds, anonymous to start, nothing kept until you keep it. When you keep a record, Catalogian watches it for changes and every delta can travel out over MCP, the REST API, or webhooks.
Paste a URL or drop a file on the homepage. The card flips and your record exists, no account needed.
Every record ships an MCP server: 18 read-only tools your LLM can call. Claude, ChatGPT, and Cursor.
01
Paste a link or drop a file on the homepage. Catalogian reads it on arrival: rows counted, columns named, a record on the card's back.
02
Copy the record's MCP URL into Claude, ChatGPT, or Cursor. Your LLM can call 18 read-only tools against the record.
03
Sign up to claim the record. A kept record checks its source on a schedule, versions every ingest, and reports exactly what changed.
Records, sessions, snapshots, deltas, and the sample.
Paste a URL, drop a file, or point at an authenticated URL.
Own the cadence: pause the schedule, overwrite your file, trigger the check, pull the delta.
What changed: counts, keys, and history windows.
REST endpoints, auth, pagination.
Delta events delivered to your endpoint.
Free, watch, max: the per-record ladder.
Drop a link on the homepage and a record comes back. No credit card required.
Quick Start guide