Agent Output Verifier by Sarnai

io.github.mglbagi/agent-output-verifier · fastapi-service-5ag4.onrender.com · MCP, Website

Verify an agent's output before you pay: JSON Schema + rules, signed receipts. Free during launch.

Name and description as published by MCP Registry

Live

Last successful check: 11 Nov 2026, 18:54 UTC.

answered, last 24 hours: 100%
answered, last 30 days: 100%

At fastapi-service-5ag4.onrender.com, its best endpoint.

How addrbook checks →

Something here contradicts its listing. Another agent that took this name first is proven to belong to sarnai.dev; this one is not. What counts as a contradiction

Evidence

Contradicted

Answers when askedShown
Answered a check 5 hours ago.
Owner provenContradicted
Another agent that took this name first is proven to belong to sarnai.dev; this one is not.
Track recordNot shown
Listed for 17 days; 30 are needed.
Independent paying walletsDoes not apply
It does not sell over x402.
Tool scanShown
None of the patterns addrbook looks for (hidden instructions, invisible characters) appeared in the 2 tools this server showed it.

Decided 12 Nov 2026, 00:34 UTC by method 2026.11.4, from its recorded evidence. A check that does not apply is left out of the count.

Connect

https://fastapi-service-5ag4.onrender.com/mcphttps://github.com/mglbagi/agent-output-verifier

MCP: addrbook sends an initialize and a tools/list. It never calls a tool. Website: addrbook loads the page.

Who's behind it

Listed by: MCP Registryio.github.mglbagi/agent-output-verifierlast seen 25 Oct, 17:52 UTC
Wallets named: None in its listings
Proven to belong to it: Nothing yet. Is it yours?
Same name: 1 other agent uses this name; Agent Output Verifier by SarnAI is proven to come from sarnai.dev.
sarnai.dev
Listed since: 25 Oct 2026, 17:52 UTC

Payments

It has no x402 endpoint, so there is no price for addrbook to read, and no source reports payments to it. How payments are read

Checks by endpoint

Host	Protocol	State	Last checked (UTC)	Last answered (UTC)	24 hours	30 days	Tools
fastapi-service-5ag4.onrender.com	MCP	Live	11 Nov, 18:52	11 Nov, 18:52	100%	100%	2changed 30 Oct 2026
github.com	Website	Live	11 Nov, 18:54	11 Nov, 18:54	100%	100%	—

Tool scan

addrbook read the descriptions of 2 tools at fastapi-service-5ag4.onrender.com on 26 Oct 2026, 16:53 UTC and found nothing to flag. It reads what the tools say about themselves; it never calls one. The recorded scan

History

30 Oct 2026, 22:47 UTCTools changed: get_verification_record.https://fastapi-service-5ag4.onrender.com/mcp#1295496
26 Oct 2026, 16:54 UTCFirst recorded as answering.https://github.com/mglbagi/agent-output-verifier#263686
26 Oct 2026, 16:53 UTCTool scan: none of the patterns checked appeared in what the server showed.https://fastapi-service-5ag4.onrender.com/mcp#263670
26 Oct 2026, 16:53 UTCTool list first read: 2 tools.https://fastapi-service-5ag4.onrender.com/mcp#263669
26 Oct 2026, 16:53 UTCFirst recorded as answering.https://fastapi-service-5ag4.onrender.com/mcp#263668
26 Oct 2026, 14:36 UTCListed by the MCP Registry. (already true when recording began)the MCP Registry#42836

Its whole history →

Is it yours?

Prove you control one of its domains or wallets and it passes the owner check. You can then reply beside the evidence and get alerts when it changes. Claim this agent

Its evidence badge, for a README or a site. It shows the same count as this page, never a verdict.

[![addrbook evidence](https://api.addrbook.com/v1/agents/agent-output-verifier-by-sarnai-dc9b27bf/badge.svg)](https://addrbook.com/agents/agent-output-verifier-by-sarnai-dc9b27bf)