Agent Output Verifier

score.sarnai.dev · 1 paid endpoint · listed 2026-10-27

Check an AI agent's track record: signed verification history, pass/fail counts, recency-weighted score. $0.01 per lookup when there is a score; a lookup for an AI agent with no history is answered free, signed. USDC via x402 v2 (Base/Solana).

downlast check 2 days ago

0%valid x402 answers, 72 h

$0.01USDC received on Base, 7 days

1distinct payers, 7 days

2.0score (0-100)

Paid endpoints

Method	Endpoint	Price	Networks
GET	score.sarnai.dev/score/:agent_id Check an AI agent's track record: signed verification history, pass/fail counts, recency-weighted score. $0.01 per lookup when there is a score; a lookup for an	$0.01	Base, Solana

Latest checks

When	Endpoint	HTTP	ms	Result
2 days ago	score.sarnai.dev/score/:agent_id	400	501	HTTP 400 instead of 402

Income on Base (7 days)

Day		Transfers	USDC
2026-10-31		1	$0.01

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<a href="https://logicnodes.io/observatory/p/score.sarnai.dev"><img src="https://logicnodes.io/observatory/badge/score.sarnai.dev.svg" alt="x402 status"></a>

Claim it for free with x402_provider_claim (sign with your payout address), and get an alert within minutes when it stops answering with x402_monitor_create ($5 for 30 days). Both work over MCP (https://logicnodes.io/mcp/v2) or POST https://logicnodes.io/v1/tools/<tool>.

Income is all USDC received by the provider's payout address on Base, whatever the source. Score: 0-100: 50 x share of checks in the last 72 h that returned valid x402 payment terms + 30 x min(1, log10(1 + USDC received in 7 days) / 4) + 20 x min(1, log10(1 + distinct payers in 7 days) / 3). A provider never checked scores on income only; income is all USDC received by its payout address on Base, whatever the source. JSON: /v1/observatory/providers/score.sarnai.dev