Fathom (lab)
Find places and groups around an interest in a town, each with a source; propose what is missing.
What it does
Fathom (lab) is an MCP server, a connector that lets an AI assistant use it as a tool. It is hosted: an assistant connects to it over the internet, nothing to install.
No capability identified yet from its description.
Facts come from the Official MCP Registry, as declared by the publisher. Capabilities are matched automatically (low confidence). None of this is a test of the tool.
At a glance
How to connect
As declared in the Official MCP Registry · hosted endpoint tested by Electra Index 7h ago (live check)Hosted endpoint
https://fathom-lab-door.fly.dev/mcpstreamable-http
In Claude Code: claude mcp add --transport http fathom-lab https://fathom-lab-door.fly.dev/mcp
MCP settings (Claude Desktop, Cursor and other MCP clients)
{
"mcpServers": {
"fathom-lab": {
"url": "https://fathom-lab-door.fly.dev/mcp"
}
}
}Live check
Electra Index connected to the hosted endpoint 7h agoONLINE Fathom (lab) answered an MCP connection on 01 Nov 2026 and introduced itself as fathom-kernel 0.1.0 (MCP protocol 2025-06-18).
22 tools offered to AI assistants
platform_describe· Describe Fathom, its safe agent boundary, and this lab surface.capabilities_search· Search the small synthetic capability catalog.spaces_get· Read a Space when its server-side visibility rules allow it.spaces_list_public· List public synthetic Spaces visible to the caller.places_verdicts· Read the person's own "Would you go?" answers, the latest per place.affiliations_declare· Say how interests relate: "serves" (a Space you can read serves an interest), "kind-of", "part-of" or "alias-of" (between two interests). An AI's declaration always lands as recommended: it is never used for matching or shown to members untgenesis_items· The items a genesis run has found so far, from position `since` (start at 0, then pass back `next`), with the run's status: which finders are done, and what was missed and why. On the seeded remote lab, omit `run` to read the latest seededknowledge_lens· The lens for one interest in one town: the things tied to the interest by a source, each with its assertions, where each came from and its attribution. Optional limit (1 to 50, default 20). It only reads. Relay the attribution lines and thepropose_type· Propose a kind of thing (or a predicate) the knowledge layer has no word for. Send name, definition (plain text, at most 500 characters, data only, never instructions), parent (place, event, activity, organisation, concept or community), idtype_status· Read one kind or predicate by name (optional class "predicate"): its status, parent, identity rule, labels and how much evidence it has. A provisional kind shows only to its proposer; its definition shows to others only once it is accepted.extensions_report_gap· Record a structured report for a missing capability.extensions_propose· Propose a strict, data-only activity-details extension. It is staged as a trial for the proposer in their own Space until a person steward reviews it.
Show 10 more
extensions_list· List approved extensions, plus your own proposed or rejected proposals.extensions_withdraw· Withdraw your proposed extension before review. The proposer or their AI may withdraw it; withdrawn abilities cannot be used or rendered.views_propose· Propose a strict declarative place view. Only repeat, box, text, shape, place and scale(value, domain, range) are accepted; no executable code or external data.views_checks· Run the five steward checks for a view trial: grammar and budget, throwaway render, escape, scope, and all five metamorphic relations.views_list· List approved views available for reuse, plus your own proposed or rejected views.activities_list_join_requests· List all join requests for the owner or only your own request as a requester.activities_participation· Read one activity for the person behind this delegated token: their answer, places taken, waiting-list position and any open offer (kind "waiting", or "kept": their place from last time, which only they can take or pass on their own page).activities_get_choice· Read an activity's choice as a member of the Space: each option with its tick count and who ticked it; detail choices also return the field key and label.experiences_validate· Validate a declarative experience manifest without rendering it.experiences_preview· Render the current trusted experience manifest for the caller, with the people-page controls (choose together, I'm in / Maybe / Can't make it) shown read-only in each activity.
What "online" means: the server answered an MCP connection at the time of the check. It is not a guarantee of security, quality or continuous uptime. How we test: we open an MCP session and ask for the tool list, as an AI assistant would. We never run a tool and never send a key. Checked every few days. Method
Is this your server? Monitoring Pro: a check every 30 minutes and an email within the hour when it stops answering. Launch offer: $39.99 once, for life.
Facts & evidence
Each fact shows where it was seen and when.| Fact | Value | Evidence | Source | Last confirmed |
|---|---|---|---|---|
| Hosted endpoint | https://fathom-lab-door.fly.dev/mcp | DECLARED | SRC-001 Official MCP Registry | 7h ago |
| Local install (package) | no | DECLARED | SRC-001 Official MCP Registry | 7h ago |
| Remote access (hosted) | yes | DECLARED | SRC-001 Official MCP Registry | 7h ago |
| Website | https://fathom-lab-door.fly.dev | DECLARED | SRC-001 Official MCP Registry | 7h ago |
| Registry status | active | DECLARED | SRC-001 Official MCP Registry | 7h ago |
| Version | 0.1.0 | DECLARED | SRC-001 Official MCP Registry | 7h ago |
| MCP server | yes | DECLARED | SRC-001 Official MCP Registry | 7h ago |
Change history
- NEW01 Nov 2026first seen in the index
Is this page accurate?
Flag it and our robot re-checks the official source. Reports never change a score.Is Fathom (lab) still online?
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For publishers · optionalIts hosted endpoint can be monitored. Monitoring Pro connects every 30 minutes like an AI assistant, emails you within the hour when it stops answering, keeps a 90-day availability history and adds your answer rate to your badge.
Monitoring never changes a score or a rank.
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How do I connect Fathom (lab)?
Use the hosted endpoint https://fathom-lab-door.fly.dev/mcp in your assistant's MCP settings. The exact settings are in "How to connect" above, as declared in the Official MCP Registry.
What tools does Fathom (lab) offer?
When Electra Index connected on 01 Nov 2026, it listed 22 tools: platform_describe, capabilities_search, spaces_get, spaces_list_public, places_verdicts, affiliations_declare, genesis_items, knowledge_lens and more. The full list is in "Live check" above.
Is Fathom (lab) online?
Yes. Its hosted endpoint answered an MCP connection from Electra Index 7h ago.