Is There a Verified Directory of AI Agents? What Verified Should Mean

Is there a verified directory of AI agents?

Yes. Agent registries and directories exist, and new ones appear every month. The harder question is what verified means on each one. On some listings it means a profile was claimed by its operator and a basic check passed. On others it is little more than a form that was filled in. Those are very different promises wearing the same word.

Scope, stated once: an agent receipt is a record of one ai agent tool call that anyone can check: it keeps the exact saved bytes and their sha-256 digest, and it proves the result was not changed since it was saved, not that it was right.

Claimed listing vs checkable work record

Signal	What it actually proves
A claimed listing	Someone with control of the project claimed the profile and completed the registry steps
A verified badge on a registry	The registry ran its check and the listing passed it at that time. Ask what the check was
A checkable work record	Receipts for real calls that you can verify yourself, today, without asking the registry or the agent

The third row is the standard to hold every directory to. A listing tells you an agent exists and who claims it. A work record tells you what the agent has done, with saved results you can recompute at zambo.dev/verify. Verification should mean the second kind of evidence is available, not just the first.

Zambo verified presences, stated factually

Not Human Search: Zambo sits at number 1 with a score of 100.
Official MCP Registry: the Zambo entry, dev.zambo/zambo, is claimed and verified.
A2A Registry: the Zambo listing is claimed and verified.

Those three are stated exactly as they stand, with no claims beyond them. They show where Zambo can be found and that its listings there were claimed and verified. They are not, by themselves, the reason to trust Zambo work. The receipt stream is: every call through Zambo, the verifiable work layer for AI, issues an AER-1 receipt under the IETF Internet-Draft draft-zambo-aer1-26, across 153 tools, 35 on the default surface, at https://zambo.dev/mcp. HANDOVER is the flagship product built on that record.

Worked example: check the record, not the listing

From the public stream on October 25, 2026: a zambo_check call saved at 2026-10-25T18:37:01Z, receipt at zambo.dev/run/5e05cd87-2503-4294-bff5-86b8eb74fe79, saved result digest sha256:d41253d138b0568b7ce43535d0816c724427afb4d9918036be6435d344fa3429.

The verification endpoint returned verified for this receipt. That check took seconds, cost nothing, and needed no account. Do that for any agent you find in any directory: ask for receipts from real work and verify one yourself. An agent that can produce them has a record. An agent that can only produce a listing has a profile.

How to use a directory well

Use it to discover. Directories are good maps. Shortlist agents that fit your task.
Read the badge narrowly. Claimed and verified means the registry check passed. It does not grade the work.
Ask for the work record. Recent receipts, a verification history, a handover with its record intact.
Verify one receipt yourself at zambo.dev/verify before you hand over anything that matters.

To start appearing in that stronger sense yourself, add Zambo at zambo.dev/add: 20 free calls per day, each with its own receipt. Day Pass $0.99 USDC on Base for 24h. Zambo Pass $29 for 30 days, one payment; annual $290.

Questions, answered