Agent Output Verifier
The service's listing describes it this way: 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). Website
FacilitatorsCoinbase
Payee
- 0x42a3…855eBase
- 38Fmaf…EjFbSolana
Methodology · settled volume through 2026-11-11 · catalog Nov 13, 2026, 2:02 AM UTC
Settled volume
$0.31
New
Payments
19
30d
Payers
3
30d
Avg payment
$0.0163
volume / payments
Daily volume and buyers · last 30 days
Daily settled volume for Agent Output Verifier
Data through Nov 11, 2026. Source: public settlement logs. Methodology
| Time | Daily settled volume for Agent Output Verifier |
|---|---|
| 2026-10-14 | $0.15 |
| 2026-10-15 | $0.06 |
| 2026-10-16 | $0.02 |
| 2026-10-17 | $0.00 |
| 2026-10-18 | $0.00 |
| 2026-10-19 | $0.00 |
| 2026-10-20 | $0.00 |
| 2026-10-21 | $0.00 |
| 2026-10-22 | $0.00 |
| 2026-10-23 | $0.01 |
| 2026-10-24 | $0.00 |
| 2026-10-25 | $0.01 |
| 2026-10-26 | $0.00 |
| 2026-10-27 | $0.00 |
| 2026-10-28 | $0.00 |
| 2026-10-29 | $0.00 |
| 2026-10-30 | $0.00 |
| 2026-10-31 | $0.01 |
| 2026-11-01 | $0.00 |
| 2026-11-02 | $0.00 |
| 2026-11-03 | $0.00 |
| 2026-11-04 | $0.00 |
| 2026-11-05 | $0.00 |
| 2026-11-06 | $0.00 |
| 2026-11-07 | $0.00 |
| 2026-11-08 | $0.00 |
| 2026-11-09 | $0.00 |
| 2026-11-10 | $0.05 |
| 2026-11-11 | $0.00 |
Payers
Daily buyers for Agent Output Verifier
| Time | Daily buyers for Agent Output Verifier |
|---|---|
| 2026-10-14 | 3 |
| 2026-10-15 | 2 |
| 2026-10-16 | 1 |
| 2026-10-17 | 0 |
| 2026-10-18 | 0 |
| 2026-10-19 | 0 |
| 2026-10-20 | 0 |
| 2026-10-21 | 0 |
| 2026-10-22 | 0 |
| 2026-10-23 | 1 |
| 2026-10-24 | 0 |
| 2026-10-25 | 1 |
| 2026-10-26 | 0 |
| 2026-10-27 | 0 |
| 2026-10-28 | 0 |
| 2026-10-29 | 0 |
| 2026-10-30 | 0 |
| 2026-10-31 | 1 |
| 2026-11-01 | 0 |
| 2026-11-02 | 0 |
| 2026-11-03 | 0 |
| 2026-11-04 | 0 |
| 2026-11-05 | 0 |
| 2026-11-06 | 0 |
| 2026-11-07 | 0 |
| 2026-11-08 | 0 |
| 2026-11-09 | 0 |
| 2026-11-10 | 1 |
| Metric | 24h | 7d | 30d |
|---|---|---|---|
| Volume | $0.00 | $0.05 | $0.31 |
| Payments | 0 | 1 | 19 |
| Payers | 0 | 1 | 3 |
| Avg payment | $0.00 | $0.05 | $0.0163 |
| Share of Identity / verification | — | 0.0% | 0.0% |
| Use-case rank | — | #48 | #60 |
Buyer concentration
62.5%
Top payer's share of lifetime volume. Not the period selected above.
Repeat buyers
33.3%
Lifetime buyers with more than one payment, divided by all buyers.
Endpoints and prices
Price, network, and asset come from the x402 Bazaar catalog.
| Endpoint | Network | Asset | Price | Scheme |
|---|---|---|---|---|
| https://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 AI agent with no history is answered free, signed. USDC via x402 v2 (Base/Solana). | base | USDC | $0.01 | exact |
| https://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 AI agent with no history is answered free, signed. USDC via x402 v2 (Base/Solana). | solana | USDC | $0.01 | exact |
Payment processors used
| Processor | Volume | Tx | Share |
|---|---|---|---|
| Coinbasex402 | $0.31 | 19 | 100.0% |
Other services in Identity / verification
All in this use case- Laso Finance#1 · $3.13K 30d
- IntegrityPhase#2 · $661.35 30d
- vAPI x402 decoder#3 · $575.03 30d
- PkgGuard by AgentGate#4 · $260.20 30d
- AgentUtility.ai#5 · $107.95 30d
How we count Agent Output Verifier
A service is a tool an AI agent pays to call. Agent Output Verifier is listed on this page under Identity / verification, settling on Base and Solana, through x402. 30-day settled volume on this page is $0.31. The listing comes from the service catalog. Open a row for payments, payers, and chains. See [Bazaar](/glossary/bazaar), [agent payment use cases](/learn/agent-payment-use-cases), and the [methodology](/methodology).
We read settlements directly from each chain's public records and refresh them every few minutes.
Data through 2026-11-11. Source: public settlement logs.
Payers can be counted more than once when they paid through more than one facilitator. Weekly change compares the last 7 full days with the 7 days before, once both weeks are fully covered on this service's networks; other periods compare with the previous period of the same length.
Cite this
APA
Agent GDP. (2026). Agent Output Verifier [Data set]. Retrieved November 13, 2026, from https://agentgdp.io/service/score.sarnai.dev.
MLA
"Agent Output Verifier." Agent GDP, 13 Nov. 2026, https://agentgdp.io/service/score.sarnai.dev.
BibTeX
@misc{agentgdp_agent_output_verifier_2026,
author = {{Agent GDP}},
title = {Agent Output Verifier},
year = {2026},
url = {https://agentgdp.io/service/score.sarnai.dev},
note = {Retrieved November 13, 2026. Data through 2026-11-11. Licensed under CC BY 4.0.},
license = {https://creativecommons.org/licenses/by/4.0/}
}Plain text
Agent Output Verifier: $0.31 settled volume (30d), 19 payments, 3 buyers. Agent GDP, data through 2026-11-11. https://agentgdp.io/service/score.sarnai.dev Retrieved November 13, 2026.
Data from Agent GDP (https://agentgdp.io/service/score.sarnai.dev), licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/).
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Volume and payment counts include earlier days. Transaction-level detail available from arc from October 26, 2026, base from October 23, 2026, polygon from October 27, 2026, solana from April 12, 2026, tempo from June 22, 2026.
Your service? Get verified organic revenue with confirmed wallets and a signed attestation.
For agents
Check a seller before your agent pays it
The same check as JSON, $0.01 per call in USDC on Base over x402. In an MCP client, use the tool check_seller_before_paying.
GET /api/v1/x402/check?q=score.sarnai.devOr check every new payee automatically:
npm i @agentgdp/check-before-payGet API accessPro
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