Pre-payment counterparty check for agents
Pre-payment counterparty check for agents: before paying or approving an EVM (Base, Ethereum, Polygon, Arbitrum) or Solana address, get ok / caution / block with reasons. Screens OFAC SDN and ScamSniffer scam lists, x402 Bazaar payee directory and known labels, and reads the address on-chain (wallet, contract, token contract, Safe, EIP-7702 delegation, activity, USDC balance).
Answeringour last check, 2026-10-24
1 of 1checks answered this week
147 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
GET https://api.youraitools.co/counterpartycheck/v1/lite
| Category | Company and compliance |
|---|---|
| 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 |
|---|---|---|---|---|
| 2026-10-24 | valid payment request | 402 | $0.005 | 147 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"address": "0x3c1A1E01e790Cd326495631B3b38Bd7068F08d6F",
"chain": "base",
"intent": "pay"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"address": {
"description": "Counterparty address: EVM 0x + 40 hex, or a Solana base58 address",
"type": "string"
},
"chain": {
"description": "Chain of the payment (default base; a base58 address implies solana)",
"enum": [
"base",
"ethereum",
"polygon",
"arbitrum",
"solana"
],
"type": "string"
},
"intent": {
"description": "What you are about to do (default pay): changes which signals matter, e.g. paying a token contract or approving an EOA",
"enum": [
"pay",
"approve",
"interact"
],
"type": "string"
}
},
"required": [
"address"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}