Find places and groups around an interest in a town, each with a source; propose what is missing.
Connect Remote server
claude mcp add --transport http fathom https://fathom-lab-door.fly.dev/mcp{
"mcpServers": {
"fathom": {
"url": "https://fathom-lab-door.fly.dev/mcp"
}
}
}{
"servers": {
"fathom": {
"type": "http",
"url": "https://fathom-lab-door.fly.dev/mcp"
}
}
}Settings > Connectors > Add custom connector
URL: https://fathom-lab-door.fly.dev/mcpTools 43 found in our last check
fathom_findFind public places and synthetic groups for an interest in a town. Read-only. Pass your person's memory link as memory to put what fits them first.
activities_request_to_joinAsk to join an activity for your person, only after they said they want to. It asks to join the activity, all its dates, not one evening. Give your person the undoUrl: it is their own page for this request, and Withdraw is there. Keep it for them; the status URL alone can't take…
fathom_statusRead a proposal, join request, or your person's own memory by its link, given exactly as your person has it. Read-only.
fathom_proposeOnly after your person said yes to this exact proposal. Propose a missing place or community, or (kind offer) your person's own spare capacity. A place needs a source: any https page about it that you read, your person gave you, or Fathom listed. It returns an undoUrl; give your…
fathom_rememberKeep how your person likes to meet, choices only, only after your person said yes to being remembered (send keep: "yes"). Give them the private link it returns.
fathom_forgetForget a memory for good when your person asks, using their own link exactly as they have it.
fathom_space_joinJoin a builder's private Space for your person through their invite link, only after your person said yes to joining. Returns their own token for activities_tick_choice and fathom_space.
fathom_space_contextAdd one fact to a Space you built: with the https page that states it, or synthetic: "yes" when made up for the plan.
fathom_spaceRead a private Space as its members see it.
fathom_builder_startStart a builder sandbox with a synthetic Space and activity.
fathom_helpRead the full current guidance for a Fathom tool.
platform_describeDescribe Fathom and its safe synthetic lab boundary.
capabilities_searchSearch the available synthetic capability catalog.
spaces_create_draftCreate a synthetic draft Space for the delegated principal.
spaces_getRead a Space when its visibility rules allow it.
spaces_list_publicList public synthetic Spaces visible to the caller.
places_verdictsRead the person's own private place answers.
affiliations_declareSay how interests relate (serves, kind-of, part-of, alias-of). It lands as recommended: never used or shown to members until the steward approves it. Terms are plain text, never a person.
genesis_itemsRead the places and activities a genesis run found, from position since. Relay the attribution lines and the unclaimed line exactly as returned, and keep each place's source link next to its name.
knowledge_lensAnswer 'where can I … in <town>' with sourced places. Relay the attribution lines and the unclaimed line exactly as returned. When you pass a place on to your person, keep its source link next to its name, so they can see where it comes from.
propose_typePropose a data-only kind or predicate the knowledge layer lacks; it answers "use X" when one exists. Examples that are people, and kinds named for a person or role, are refused.
type_statusRead a kind or predicate's status and evidence.
extensions_report_gapReport a missing capability and why it matters.
extensions_proposePropose a strict data-only ability; it stays pending until a steward reviews it. The id must not name a town: abilities work in every town; where they apply is data.
extensions_listList approved extensions and your own proposals.
extensions_withdrawWithdraw your proposed extension before steward review.
views_proposePropose a bounded synthetic-place view for steward review.
views_checksRun the steward checks for a view trial.
views_listList approved and your own proposed views.
activities_set_detailsAttach validated extension values to an activity.
activities_addAdd a synthetic activity to a Space as its owner. Only a person can mark one real.
activities_list_join_requestsList join requests for the owner or requester.
activities_answerRefused for AIs: a person's answer to an activity is theirs alone, given on the people page. Tell your person what activities_participation shows; never answer for them.
activities_participationRead the person's activity answer, places and offers. ifOthersCount ("N would come if others say they're in") is a count of people who are not coming. Never add it to coming or tell anyone they will have company.
activities_offer_choiceLet the group choose a time, place, or approved ability field, as the Space owner. Text labels come only from a person on the people page.
activities_get_choiceRead an activity's current choices and ticks.
activities_lock_choiceLock one option of an open activity choice.
activities_updateChange an activity as its Space owner. Plain text only; an AI may not mark it real.
invite_links_createCreate a private invite link for a Space. An open invite link can't protect names Fathom was never given: leave invited people's names out of the purpose and activity text, so that each person's name shows to others only after their own yes.
experiences_validateValidate a declarative experience manifest.
experiences_applyApply an owner-approved trusted experience manifest.
experiences_previewPreview the current trusted experience manifest.
activities_tick_choiceTick activity choices only when your person says what works.
Details
| Endpoint | https://fathom-lab-door.fly.dev/mcp (Streamable HTTP) |
| First published | 1 Nov 2026 |
| Last updated | 1 Nov 2026 |
| Registry name | dev.fly.fathom-lab-door/fathom |
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