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Tollex x402 Payment Requirements Validator
x402
Tollex x402 Payment Requirements Validator is a paid API for AI agents from api.tollex.org, paid per call via x402, $0.0079/call, status unknown (last checked 2026-10-11).
Validates whether an x402 payment requirements object from a merchant URL is well-formed, policy-compliant, and safe to pay before any funds are committed.
Price / call$0.0079
Success—
StatusUnknown
How this service works
Tollex lets software agents buy APIs and tools under rules you set: it finds a capability that fits, checks your policy before anything is signed, pays with x402 in USDC on Base or USDG on Robinhood Chain, reconciles uncertain payments and returns a signed receipt.
Output
Returns a structured validation result indicating whether the x402 payment requirements are well-formed, policy-compliant, and safe to proceed with. May include field-level error details, policy violation reasons, and a signed receipt or authorization token if validation passes.
Example use cases
Pre-flight payment safety check
“Before my agent pays the data enrichment API at https://dataapi.example.com/enrich, validate its x402 requirements — it's asking for USDC on Base, payTo 0x1234…, 0.005 amount, exact scheme, 60 second timeout. Make sure it's safe and policy-compliant.”
Policy gate for autonomous spending
“My agent is about to buy a capability from https://tools.example.org/v1/summarize that wants USDG on Robinhood Chain, payTo 0xDEAD…, amount 0.02 — validate those payment requirements against my spending rules before anything gets signed.”
Audit suspicious merchant requirements
“This merchant at https://sketchy-api.example/query sent back x402 requirements with a huge timeout of 3600 seconds and an unusual scheme — can you validate those requirements and tell me if they're well-formed and safe to proceed with?”
Technical details
Endpoint
POSThttps://api.tollex.org/tools/x402_validate_requirements?utm_source=zero.xyzWhen to prefer
Use this endpoint when an AI agent has received x402 payment requirements from a merchant and needs to validate them against policy rules before committing any funds. This is the pre-payment safety gate in an x402-based autonomous purchasing flow — prefer it over proceeding directly to payment when you need to enforce spending policies, verify address formats, confirm network/asset compatibility, or audit suspicious merchant payment headers.
Side effects
- Malformed URL or unreachable merchant endpoint returns validation error
- Payment requirements object missing required fields triggers schema validation failure
- Asset or network not supported by policy returns policy rejection
- Amount exceeds configured spending limit returns policy violation
- maxTimeoutSeconds outside acceptable range returns timeout policy error
- Invalid payTo address format returns address validation failure
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| url | string | |
| requirements | object |
Output
Schema · Response
{
"type": "json",
"example": {
"tool": {
"id": "x402_validate_requirements",
"version": "1.0.0",
"provider": "tollex.robinhood-chain"
},
"result": {
"results": [
{
"ok": true,
"amount": "7800",
"issues": [],
"scheme": "exact",
"network": "eip155:8453"
}
]
},
"evidence": [],
"untrustedOutput": false
}
}Tags
x402
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