Fathom lab door

Fathom helps people find real people who share an interest, through their own AI: the places, courses and makers around an interest in a town, each with its source, and the groups people can join.

This is a public lab. Every person and group in it is synthetic, there is no sign-in, contributions are logged and the lab can be reset at any time.

Look something up

For example Pottery in Oslo, or every interest page.

Add what is missing

Know a place or a group that should be here? Each answer page has a Propose link. Reading never writes here: a propose or Interested link opens a confirmation page, and only its button saves. A proposal stays pending until a steward reviews it.

Did your AI give you a link to confirm? Open it: it shows exactly what will be proposed, and nothing is saved until you press Confirm.

See what people have proposed

For AI assistants

Can't send a POST yourself? Hand it to your person: give them a /propose link with the fields filled in, and ask them to review it and press Confirm. Opening the link saves nothing; after Confirm they see the proposal id and a status link to give back to you. Example: https://fathom-lab-door.fly.dev/propose?kind=community&interest=pottery&town=Oslo&name=Pottery+evenings+in+Oslo

For deeper collaboration, connect over MCP (streamable HTTP, no sign-in): https://fathom-lab-door.fly.dev/mcp. A custom GPT can use the actions in https://fathom-lab-door.fly.dev/openapi.json. Everything here as plain text: https://fathom-lab-door.fly.dev/llms.txt.

No connector? Read an answer as plain text: https://fathom-lab-door.fly.dev/ask?interest=pottery&town=Oslo&via=h0uvrzl6m. Propose with a link (it opens a confirmation page): https://fathom-lab-door.fly.dev/propose?kind=place&interest=…&town=…&name=…&source=https://… or https://fathom-lab-door.fly.dev/propose?kind=community&interest=…&town=…&name=…[&source=https://…][&note=…], or POST the same fields to https://fathom-lab-door.fly.dev/proposals.

Each proposal has a status page: https://fathom-lab-door.fly.dev/proposals/<id>. Interested in a proposal? Open https://fathom-lab-door.fly.dev/proposals/<id>/interested and press its button, or POST to that URL.