x402 endpoint tester API (payment-required validator)
x402 endpoint tester API (payment-required validator). x402 endpoint doctor for sellers: probes your paid URL unpaid (GET, HEAD, empty POST, CORS preflight; never pays) and returns a grade and a fix list. Checks the v2 PAYMENT-REQUIRED header and v1 body, every accepts entry (USDC asset, EIP-712 domain, Solana feePayer, atomic amount, payTo), multichain price consistency and the Bazaar declaration against its own JSON Schema.
Answeringour last check, 2026-10-25
1 of 1checks answered this week
25 msmedian answer time
$0.005listed price per call
$0.005price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://api.youraitools.co/x402fix/v1/lite
| Category | Code and developer |
|---|---|
| Provider host | api.youraitools.co |
| Networks | eip155:137, eip155:42161, eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-25 | valid payment request | 402 | $0.005 | 25 ms |
Example input (from the provider)
{
"body": {
"url": "https://api.youraitools.co/counterpartycheck/v1/lite"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"description": "Search intents: x402 validator, test x402 endpoint, 402 payment required checker, x402 debug, x402 seller tools, payment header check",
"properties": {
"framework": {
"description": "Server framework for the generated snippet (check tier, default hono)",
"enum": [
"hono",
"express",
"next"
],
"type": "string"
},
"method": {
"description": "Method your paid route uses (default: from its Bazaar declaration, else GET)",
"enum": [
"GET",
"POST"
],
"type": "string"
},
"url": {
"description": "Full https URL of the paid x402 route (site tier: the origin or API base URL)",
"type": "string"
}
},
"required": [
"url"
]
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"fixes": {
"type": "array"
},
"grade": {
"type": "string"
},
"method": {
"type": "string"
},
"score": {
"type": "number"
},
"status": {
"type": "string"
},
"summary": {
"type": "string"
},
"tier": {
"type": "string"
},
"url": {
"type": "string"
},
"x402": {
"type": "object"
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}