Seller due-diligence for one x402 endpoint
Seller due-diligence for one x402 endpoint. We make a real capped test payment, check the paid response against the listed schema, compare payTo with the CDP listing, read a recent window of on-chain USDC payments to the payTo and screen for lookalike addresses. Returns a signed JSON verdict of evidenced facts. No charge unless the test payment and all 4 other checks complete. Facts, not endorsement; no warranty. Not affiliated with the seller checked. $5.
Answeringour last check, 2026-10-24
1 of 1checks answered this week
264 msmedian answer time
$5.00listed price per call
$5.00price 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://horizonpulse.dev/api/seller-dd/single
| Category | Market data |
|---|---|
| Provider host | horizonpulse.dev |
| Networks | eip155:8453 |
| 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 |
|---|---|---|---|---|
| 2026-10-24 | valid payment request | 402 | $5.00 | 264 ms |
Example input (from the provider)
{
"body": {
"expected_payTo": null,
"resource": "https://example.com/api/paid"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"properties": {
"expected_payTo": {
"description": "Optional EVM address to compare with the endpoint's payTo.",
"type": [
"string",
"null"
]
},
"resource": {
"description": "https URL of the x402 endpoint to check (required).",
"format": "uri",
"maxLength": 2048,
"type": "string"
}
},
"required": [
"resource"
]
},
"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": {
"description": "Signed JSON verdict of evidenced facts (charged) or a no_charge body (not charged). pass means Horizon Pulse's charge criteria were met; it is not a rating of the seller. The example shows the shape only; seller values are placeholders.",
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}