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x402 Endpoint Inspector (Vextorium)
x402
x402 Endpoint Inspector (Vextorium) is a paid API for AI agents from api.vextorium.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-10-02).
Inspects any x402 payment-gated endpoint before paying — returning price, asset safety, payee address, contract status, authorization timeout, Bazaar metadata, and risk alerts with a verdict.
Price / call$0.004
Success—
StatusUnknown
How this service works
Check any x402 endpoint before paying, without paying: price in USD per network, asset (flags anything that is not official USDC), pay-to address and whether it is a contract, authorization timeout, Bazaar metadata, and risk alerts with a clear verdict.
Output
A structured JSON response containing: whether the URL is a valid x402 endpoint, the x402 protocol version, all payment options (network, asset, price in USD, raw amount, payee address, whether payee is a contract, whether asset is official USDC, authorization timeout in seconds), a Bazaar metadata flag, a description, a list of risk alerts each with a severity level and message, and a final plain-language verdict.
Example use cases
Safety check before agent payment
“I'm about to have my agent call a paid x402 API at https://data-provider.xyz/premium-feed — can you inspect it first and tell me the price, whether it uses official USDC, and if there are any risk alerts I should know about?”
Auditing unknown x402 API
“I found this x402 endpoint https://unknown-service.io/api/query in a marketplace listing — please inspect it, check if the pay-to address is a contract, what network it runs on, and give me a verdict on whether it looks legitimate.”
Comparing payment terms across endpoints
“Check https://api.competitor.com/endpoint for its x402 payment details — I want to know the price in USD, the authorization timeout in seconds, and whether it has a Bazaar metadata record.”
Technical details
Endpoint
POSThttps://api.vextorium.com/x402-inspector-pago?utm_source=zero.xyzWhen to prefer
Use this endpoint whenever an agent needs to evaluate an x402 payment-gated API before committing funds — especially when the endpoint is unknown, found via a marketplace, or when you want to verify asset authenticity, payee legitimacy, and risk posture without actually transacting. Ideal for agentic workflows that must gate payment decisions on safety checks.
Side effects
- Target URL is not an x402 endpoint — es_x402 returns false with no payment options
- Target URL is unreachable or times out — error response with no data
- Endpoint returns malformed x402 headers — partial data with warnings
- Asset is not official USDC — flagged in activo_es_usdc_oficial field as false
- Payee address is a smart contract — flagged with pagar_a_es_contrato true and a risk alert
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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