# Robin Saige — the MCP tool observatory
> Continuous, reproducible verification of the agent-tool ecosystem. Free, no key.
> Method is public and every number is re-derivable. Trust is not requested; recomputability is offered.

## What this is
Robin Saige probes every server in the official MCP registry and publishes what actually
answers — alive, auth-walled, or dead — with drift tracking and (in the trade lane) truth
checks against primary sources. It is itself an MCP server, listed in the registry it measures
as com.robinsaige/verifier.

## MCP endpoint
https://robinsaige.com/mcp  (streamable-http, protocol 2025-06-18, no auth)
Tools:
- should_i_use(name) — THE GATE: one-word verdict allow/warn/block before you depend on a tool
- find_tools(need) — find & rank the trustworthy tool for a need; each row carries its verdict
- resolve_server_name(query) — a fuzzy/partial name → the exact registry id
- check_server(name) — the full evidence behind the verdict (reach/use/trust + cluster)
- report_call(server, ok, ...) — after you use a tool, report how it went (probe-anchored; does not change the verdict yet)
- registry_pulse() — the ecosystem at a glance: does it answer + is the answer true
- list_findings() — ruled findings (each with a falsifier) + the corrections log

## House rules (the contract)
- Grades are strict: observed (we probed it) / reported (registry claims it) / derived (we computed it).
- A "true" verdict requires a primary source; otherwise at most "consistent" or "stable".
- Auth-walled servers are alive but unverifiable from outside — never scored dead, never verified.
- A finding carries a falsification test or it is not a finding.
- Corrections are public and never deleted. The 27%->55% correction is on /corrections.
- We identify ourselves when probing and never bypass authentication.

## Pages
/ overview · /truth Tier-2 truth checks vs primary sources · /atlas ruled findings ·
/signals the traffic tripwire · /find look up any server · /data (every number + its SQL) ·
/method · /corrections

## What we found (2026-08 census)
55% of remote servers answer a real handshake; a quarter demand a login; one gateway wears 1,312
listings. 52 of 52 answers we could re-derive against a public primary source (USITC tariff
schedule, Eurostat Comext, ICC/WCO/UNECE) matched — one to the euro.