The platform for software for agents
What should I use — and can I trust it?
One verified answer over everything agents can invoke — fresh · tested · signed.
Fresh — re-crawled and re-checked weekly · Tested — contracts machine-verified, never inferred from marketing · Signed — every verified record carries a cryptographic passport you can check offline
How an answer earns itself
Crawl the invokable universe
MCP servers, APIs, libraries, CLIs, models — everything an agent can invoke, harvested from registries and specs every week. History is never reset.
Verify by machine
Does the package resolve? Does the spec parse? Does it install and run? Contracts are checked mechanically — no LLM guessing, no self-reported claims.
Sign what passed
Every verified record gets an Ed25519 trust passport — a sealed, dated certificate any human or agent can verify offline before invoking.
Honest tiers, always: “not yet verified” is never “failed” — and when nothing qualifies, the answer is an honest no, not a guess. Full methodology →
A real answer — live from the index, not a mockup
q: “postgres”
Top verified match: it matches your intent, and it holds a strong verification score, corroborated across multiple registries.
claude mcp add postgres-mcp-server -- npx -y @henkey/postgres-mcp-server
Also close: @yawlabs/postgres-mcp (static-verified) · mcp-postgres (static-verified)
This is the actual engine output for this query, recomputed as the corpus refreshes — try it yourself above, or see this answer at /answer.
Three ways in
I’m choosing software
Ask in plain words, get one verified pick with its evidence — or an honest no. Browse the census and every record’s page.
Ask the engine →I’m building an agent
Give your agent the same six capabilities — answer, search, verify-before-invoke, resolve, passports, stats — over MCP or plain HTTP. Free, no key.
claude mcp add unfragile →I built something
Your MCP server, API, or library is probably already in the corpus. Get it verified and signed — the badge is earned, never bought.
Get verified →The state of the agent economy, measured
Across the 74 software entities we track, 51 ship an official agent door today — 23 still don’t. 9 of those publish an official machine contract but no agent port — one conversion away. The rest are reachable only through third-party doors.
Computed from verified doors, never from claims — re-checked weekly. The Agent-Readiness Map →
Rankings are never for sale. Vendors can pay to be verified deeper — never to be the answer.