Fathom (lab)

dev.fly.fathom-lab-door/fathomVersion 0.1.0

Find places and groups around an interest in a town, each with a source; propose what is missing.

Status

Responds126 msNov 14, 2026, 14:26 UTCAnswered our handshake without sign-in.

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Last checked: Nov 14, 2026, 14:26 UTC
Latency: 126 ms
Remotes responding: 1 of 1
Sign-in: No sign-in
Hosting: Hosted outside the EU (detected)
Registry data as of: Nov 14, 2026, 22:14 UTC

Data from the official MCP Registry, checked by run.zero. How we check

Connect

Streamable HTTP

https://fathom-lab-door.fly.dev/mcpResponds126 msNov 14, 2026, 14:26 UTC

No sign-in

Claude Code

claude mcp add --transport http fathom https://fathom-lab-door.fly.dev/mcp

Claude Desktop and claude.ai

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Settings > Connectors > Add custom connector
Name: fathom
Remote MCP server URL: https://fathom-lab-door.fly.dev/mcp

Cursor

{
  "mcpServers": {
    "fathom": {
      "url": "https://fathom-lab-door.fly.dev/mcp"
    }
  }
}

VS Code

code --add-mcp '{"name":"fathom","type":"http","url":"https://fathom-lab-door.fly.dev/mcp"}'

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Tools

43 tools

Tools of Fathom (lab)
	Description		Read-only	Idempotent	Open world
`activities_add`Add a synthetic activity to a Space as its owner. Only a person can mark one real.	Add a synthetic activity to a Space as its owner. Only a person can mark one real.	No	No	Not declared	No
`activities_answer`Refused 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.	Refused 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.	Yes	No	Not declared	No
`activities_get_choice`Read an activity's current choices and ticks.	Read an activity's current choices and ticks.	No	Yes	Not declared	No
`activities_list_join_requests`List join requests for the owner or requester.	List join requests for the owner or requester.	No	Yes	Not declared	No
`activities_lock_choice`Lock one option of an open activity choice.	Lock one option of an open activity choice.	Yes	No	Not declared	No
`activities_offer_choice`Let 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.	Let 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.	No	No	Not declared	No
`activities_participation`Read 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.	Read 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.	No	Yes	Not declared	No
`activities_request_to_join`Ask 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 the request back.	Ask 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 the request back.	No	No	Not declared	No
`activities_set_details`Attach validated extension values to an activity.	Attach validated extension values to an activity.	Yes	No	Not declared	No
`activities_tick_choice`Tick activity choices only when your person says what works.	Tick activity choices only when your person says what works.	No	No	Not declared	No
`activities_update`Change an activity as its Space owner. Plain text only; an AI may not mark it real.	Change an activity as its Space owner. Plain text only; an AI may not mark it real.	Yes	No	Not declared	No
`affiliations_declare`Say 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.	Say 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.	No	No	Not declared	Yes
`capabilities_search`Search the available synthetic capability catalog.	Search the available synthetic capability catalog.	No	Yes	Not declared	No
`experiences_apply`Apply an owner-approved trusted experience manifest.	Apply an owner-approved trusted experience manifest.	Yes	No	Not declared	No
`experiences_preview`Preview the current trusted experience manifest.	Preview the current trusted experience manifest.	No	Yes	Not declared	No
`experiences_validate`Validate a declarative experience manifest.	Validate a declarative experience manifest.	No	Yes	Not declared	No
`extensions_list`List approved extensions and your own proposals.	List approved extensions and your own proposals.	No	Yes	Not declared	No
`extensions_propose`Propose 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.	Propose 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.	No	No	Not declared	Yes
`extensions_report_gap`Report a missing capability and why it matters.	Report a missing capability and why it matters.	No	No	Not declared	No
`extensions_withdraw`Withdraw your proposed extension before steward review.	Withdraw your proposed extension before steward review.	Yes	No	Not declared	No
`fathom_builder_start`Start a builder sandbox with a synthetic Space and activity.	Start a builder sandbox with a synthetic Space and activity.	No	No	Not declared	Yes
`fathom_find`Find 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.	Find 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.	No	Yes	Not declared	No
`fathom_forget`Forget a memory for good when your person asks, using their own link exactly as they have it.	Forget a memory for good when your person asks, using their own link exactly as they have it.	Yes	No	Not declared	No
`fathom_help`Read the full current guidance for a Fathom tool.	Read the full current guidance for a Fathom tool.	No	Yes	Not declared	No
`fathom_propose`Only 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 person the undoUrl: it is their own page for the proposal, and Withdraw is there. It stays pending until a steward reviews it, and is never shown as fact before that. An offer never says who: no email, phone, link or address.	Only 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 person the undoUrl: it is their own page for the proposal, and Withdraw is there. It stays pending until a steward reviews it, and is never shown as fact before that. An offer never says who: no email, phone, link or address.	No	No	Not declared	Yes
`fathom_remember`Keep 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.	Keep 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.	No	No	Not declared	Yes
`fathom_space`Read a private Space as its members see it.	Read a private Space as its members see it.	No	Yes	Not declared	No
`fathom_space_context`Add one fact to a Space you built: with the https page that states it, or synthetic: "yes" when made up for the plan.	Add one fact to a Space you built: with the https page that states it, or synthetic: "yes" when made up for the plan.	No	No	Not declared	Yes
`fathom_space_join`Join 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.	Join 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.	No	No	Not declared	Yes
`fathom_status`Read a proposal, join request, or your person's own memory by its link, given exactly as your person has it. Read-only.	Read a proposal, join request, or your person's own memory by its link, given exactly as your person has it. Read-only.	No	Yes	Not declared	No
`genesis_items`Read 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.	Read 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.	No	Yes	Not declared	No
`invite_links_create`Create 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.	Create 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.	No	No	Not declared	No
`knowledge_lens`Answer '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.	Answer '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.	No	Yes	Not declared	No
`places_verdicts`Read the person's own private place answers.	Read the person's own private place answers.	No	Yes	Not declared	No
`platform_describe`Describe Fathom and its safe synthetic lab boundary.	Describe Fathom and its safe synthetic lab boundary.	No	Yes	Not declared	No
`propose_type`Propose 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.	Propose 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.	No	No	Not declared	Yes
`spaces_create_draft`Create a synthetic draft Space for the delegated principal.	Create a synthetic draft Space for the delegated principal.	No	No	Not declared	No
`spaces_get`Read a Space when its visibility rules allow it.	Read a Space when its visibility rules allow it.	No	Yes	Not declared	No
`spaces_list_public`List public synthetic Spaces visible to the caller.	List public synthetic Spaces visible to the caller.	No	Yes	Not declared	No
`type_status`Read a kind or predicate's status and evidence.	Read a kind or predicate's status and evidence.	No	Yes	Not declared	No
`views_checks`Run the steward checks for a view trial.	Run the steward checks for a view trial.	No	No	Not declared	No
`views_list`List approved and your own proposed views.	List approved and your own proposed views.	No	Yes	Not declared	No
`views_propose`Propose a bounded synthetic-place view for steward review.	Propose a bounded synthetic-place view for steward review.	No	No	Not declared	Yes

Details

Registry status: Active
Published: Nov 1, 2026
Updated: Nov 1, 2026
Website: https://fathom-lab-door.fly.dev/⁠ (opens in a new tab)
Repository: Not given
Categories (suggested): Knowledge and notesSuggested categories are assigned automatically from the registry text and may be wrong. Verified operators can correct them.
GDPR: Not declared

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