What does vet402 actually compute?

vet402 publishes three measurements. L0 checks if the payment wall answers a valid 402. L1 checks if a real purchase settled and the paid request answered 2xx other than 202 with a non-empty body. L2 checks if that response matches the seller's declaration when published. The decision API returns ALLOW, WARN, or BLOCK from these records. None of these checks verify the content is correct.

Is a vet402 score a guarantee or a credit assessment?

No. Scores are informational signals derived from public on-chain data and ERC-8004 records. They do not constitute a guarantee, credit assessment, KYC, or legal certification of any counterparty. Every API response that carries a score includes this disclaimer directly in the payload.

Does vet402 take custody of funds?

No. vet402 never holds, moves, or has signing authority over customer funds. There is no wallet to deposit into, no balance held, and no customer keys that vet402 can sign with. However, vet402 does spend its own funds to buy from x402 endpoints as part of its measurement service.

Which chains does vet402 support?

Scoring reads wallet and ERC-8004 signals from Base mainnet. The observatory's L0 probes run across every chain in the public x402 discovery catalog. L1 purchases have run on Base, Arc, Celo, Arbitrum One, Avalanche C-Chain, BNB Chain, Solana, Stellar, Tempo and XRPL. Settlement is re-read on-chain using chain-specific binding methods. The settlement asset is USDC on Base, Arc, Celo, Solana, Stellar, Arbitrum One and Avalanche C-Chain, with different assets on other chains.

x402 is a machine-payment protocol built on the HTTP 402 "Payment Required" status code. An API returns 402 with payment terms, the caller (often an AI agent) pays on-chain, and retries the request with proof of payment attached. There's no account, no invoice, and no human approving the transaction — which is what makes it fast for agent-to-agent commerce, and also what makes it blind: the provider sees the payment only after it has already settled.

APIs & SDKs · Japan

vet402

Independent measurement of x402 payments for AI agents

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Community votes: 0
DR by Ahrefs: 27 no change since last check

Ahrefs Domain Rating benchmarked 9 Nov 2026, rebuilt 8 Nov 2026.

What it is

Screenshot of the vet402 homepage — vet402.com, as visitors see it

vet402 is an independent measurement service for x402 payments, a machine-payment protocol for AI agents built on HTTP 402. It helps agent developers verify x402 endpoints before paying and helps service operators check payers. vet402 buys from sellers itself in stablecoins, checks what each one sends back, and publishes each purchase on-chain, including those that did not deliver. Buyers can look up sellers using curl, TypeScript, Python, MCP or no-code tools. Sellers can integrate payment gates through Express, Hono or Next.js middleware. The service publishes three measurements: L0 (valid 402 response), L1 (real purchase settled with 2xx response), and L2 (response matches seller declaration). A decision API returns ALLOW, WARN, or BLOCK based on these records.

What it is built with

API key management with free tier at 10 requests per minute
Multi-language SDK support including curl, TypeScript, Python, MCP and no-code n8n
L0, L1 and L2 measurement layers for payment verification
On-chain settlement re-verification across multiple blockchains
Trust score and decision API (ALLOW, WARN, BLOCK)
Public impact ledger recording all purchases and deliveries
Support for Base, Arc, Celo, Arbitrum One, Avalanche C-Chain, BNB Chain, Solana, Stellar, Tempo and XRPL

Pricing

Free: US$0 per month (1,000 lookups a month); Pro: US$49 per month (50,000 lookups a month); Scale: US$199 per month (500,000 lookups a month)

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vet402 metrics

Benchmarks for vet402.com: Ahrefs Domain Rating and Majestic link data, with the change since the last build.
Metric	Value
Domain Rating	27 no change since last check
Trust Flow	2 no change since last check
Citation Flow	23 no change since last check
Referring domains	18 no change since last check
External backlinks	49 no change since last check

Ahrefs Domain Rating benchmarked 9 Nov 2026, rebuilt 8 Nov 2026. Main build topic: Business/Construction and Maintenance (2). Majestic benchmarked 8 Nov 2026, rebuilt 8 Nov 2026. Link data built by Majestic. Trust Flow, Citation Flow and Topical Trust Flow are trademarks of Majestic-12 Ltd.

vet402 domain build sheet

Open the build sheet

Public RDAP record, last read 9 Nov 2026, 11:45 UTC.
Domain age	2 months
Registered	12 Aug 2026
Expires	12 Aug 2027
Registrar	Porkbun LLC
DNSSEC	Signed

Inspect vet402.com's registration

vet402 after-launch build log

Since vet402 launched on Maker Launches on 8 November 2026, these are the figures we have tracked.

Domain Rating (Ahrefs): 27 no change since launch; 27 at launch (8 Nov 2026), 27 on 9 Nov 2026
Trust Flow (Majestic): 2; First measured 8 Nov 2026
Referring domains (Majestic): 18; First measured 8 Nov 2026

Day 1 since launch. Next receipt: day 30, 8 Dec 2026. We show what changed, not what caused it: many things affect these numbers. Nothing here is estimated.

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Questions from the bench

What does vet402 actually compute?: vet402 publishes three measurements. L0 checks if the payment wall answers a valid 402. L1 checks if a real purchase settled and the paid request answered 2xx other than 202 with a non-empty body. L2 checks if that response matches the seller's declaration when published. The decision API returns ALLOW, WARN, or BLOCK from these records. None of these checks verify the content is correct.
Is a vet402 score a guarantee or a credit assessment?: No. Scores are informational signals derived from public on-chain data and ERC-8004 records. They do not constitute a guarantee, credit assessment, KYC, or legal certification of any counterparty. Every API response that carries a score includes this disclaimer directly in the payload.
Does vet402 take custody of funds?: No. vet402 never holds, moves, or has signing authority over customer funds. There is no wallet to deposit into, no balance held, and no customer keys that vet402 can sign with. However, vet402 does spend its own funds to buy from x402 endpoints as part of its measurement service.
Which chains does vet402 support?: Scoring reads wallet and ERC-8004 signals from Base mainnet. The observatory's L0 probes run across every chain in the public x402 discovery catalog. L1 purchases have run on Base, Arc, Celo, Arbitrum One, Avalanche C-Chain, BNB Chain, Solana, Stellar, Tempo and XRPL. Settlement is re-read on-chain using chain-specific binding methods. The settlement asset is USDC on Base, Arc, Celo, Solana, Stellar, Arbitrum One and Avalanche C-Chain, with different assets on other chains.
What is x402?: x402 is a machine-payment protocol built on the HTTP 402 "Payment Required" status code. An API returns 402 with payment terms, the caller (often an AI agent) pays on-chain, and retries the request with proof of payment attached. There's no account, no invoice, and no human approving the transaction — which is what makes it fast for agent-to-agent commerce, and also what makes it blind: the provider sees the payment only after it has already settled.

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