Up to 25 counterparty risk checks in one call, billed per item, each with a sign
Up to 25 counterparty risk checks in one call, billed per item, each with a signed ES256 attestation.
Answeringour last check, 2026-09-30
1 of 1checks answered this week
2166 msmedian answer time
$0.002listed price per call
$0.002price 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://x402check.xyz/v1/risk-check/batch
| Category | Everything else |
|---|---|
| Provider host | x402check.xyz |
| Networks | eip155:1329, eip155:137, eip155:143, eip155:42161, eip155:43114, eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| Payment schemes | exact |
| Self-reported calls, 30 days | 0 from 0 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-30 | valid payment request | 402 | $0.002 | 2166 ms |
Example input (from the provider)
{
"body": {
"requests": [
{
"chain": "base",
"context": "Permit2 signature: unlimited USDC allowance to this spender",
"domain": "https://app.example-dapp.org",
"interaction": {
"type": "permit_signature",
"unlimited": true
},
"wallet": "0x7a3e8f0c2b1d4e5f6a7b8c9d0e1f2a3b4c5d6e7f"
},
{
"chain": "base",
"wallet": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"
}
]
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"properties": {
"requests": {
"items": {
"properties": {
"aud": {
"description": "Audience to bind the attestation to",
"maxLength": 256,
"type": "string"
},
"authorization": {
"properties": {
"pre_authorized": {
"type": "boolean"
},
"source": {
"maxLength": 128,
"type": "string"
}
},
"required": [
"pre_authorized"
],
"type": "object"
},
"chain": {
"description": "CAIP-2 id or alias, e.g. base, ethereum, solana",
"maxLength": 64,
"type": "string"
},
"context": {
"description": "The content the agent acted on, verbatim: checked for injected instructions",
"maxLength": 4096,
"type": "string"
},
"domain": {
"description": "The site or dApp involved",
"maxLength": 2048,
"type": "string"
},
"interaction": {
"additionalProperties": false,
"properties": {
"type": {
"enum": [
"native_transfer",
"token_transfer",
"token_approval",
"nft_approval",
"permit_signature",
"order_signature",
"message_signature",
"contract_call"
],
"type": "string"
},
"unlimited": {
"type": "boolean"
}
},
"required": [
"type"
],
"type": "object"
},
"payment": {
"additionalProperties": false,
"description": "The payment this check is for; the attestation is bound to it",
"properties": {
"amount": {
"pattern": "^\\d{1,78}$",
"type": "string"
},
"asset": {
"type": "string"
},
"network": {
"type": "string"
},
"pay_to": {
"type": "string"
},
"resource": {
"maxLength": 512,
"pattern": "^https?://\\S+$",
"type": "string"
}
},
"type": "object"
},
"screening": {
"properties": {
"sanctions": {
"enum": [
"clean",
"flagged",
"unknown"
],
"type": "string"
}
},
"required": [
"sanctions"
],
"type": "object"
},
"transaction": {
"additionalProperties": false,
"description": "An EVM transaction to simulate before it is signed ($0.005 per simulated item)",
"properties": {
"data": {
"pattern": "^0x([0-9a-fA-F]{2})*$",
"type": "string"
},
"from": {
"pattern": "^0x[0-9a-fA-F]{40}$",
"type": "string"
},
"to": {
"pattern": "^0x[0-9a-fA-F]{40}$",
"type": "string"
},
"value": {
"pattern": "^(0x[0-9a-fA-F]{1,64}|\\d{1,78})$",
"type": "string"
}
},
"required": [
"from"
],
"type": "object"
},
"wallet": {
"description": "The counterparty to check: recipient, spender, operator or pay_to (EVM, Solana, Bitcoin or Tron address)",
"maxLength": 128,
"minLength": 1,
"type": "string"
}
},
"required": [
"wallet"
],
"type": "object"
},
"maxItems": 25,
"minItems": 1,
"type": "array"
}
},
"required": [
"requests"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"type": {
"const": "ht