CounterpartyCheck by AgentGate
Full crypto counterparty due diligence API. Full counterparty due diligence before an agent pays or interacts: quick plus age (first transaction or creation block), recent activity and direct exposure to sanctioned or scam-listed addresses, recent token approvals to the address (drainer pattern) and TokenVerdict for Base tokens; Solana adds history depth. Verdict ok / caution / block with reasons, confidence and missing_data.
DataLiveeip155:8453Exactvia cdp
CryptoCounterparty-riskDue-diligenceWallet-screeningCheck_counterparty
Settlements · 30d
228
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days.
$256.05
Verified settled volume
226 settlements proven x402 by their on-chain EIP-3009 marker.
$0.050
Listed price
As published in the catalog. Always read the live 402 before paying.
3
Calls · 30d
Upstream's own call count for this endpoint, not ours.
2
Unique payers · 30d
Last called 2026-10-25 01:04Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x3c1A1E01e790Cd326495631B3b38Bd7068F08d6FThe wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
Provider
The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.
Live 402 challenge
Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.
{
"error": "X-PAYMENT header is required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x3c1A1E01e790Cd326495631B3b38Bd7068F08d6F",
"scheme": "exact",
"network": "base",
"mimeType": "application/json",
"resource": "https://api.youraitools.co/counterpartycheck/v1/full",
"description": "Full counterparty due diligence before an agent pays or interacts: quick plus age (first transaction or creation block), recent activity and direct exposure to sanctioned or scam-listed addresses, recent token approvals to the address (drainer pattern) and TokenVerdict for Base tokens; Solana adds history depth. Verdict ok / caution / block with reasons, confidence and missing_data.",
"outputSchema": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"chain": {
"type": "string",
"required": false,
"description": "Chain of the payment (default base; a base58 address implies solana)"
},
"intent": {
"type": "string",
"required": false,
"description": "What you are about to do (default pay): changes which signals matter, e.g. paying a token contract or approving an EOA"
},
"address": {
"type": "string",
"required": true,
"description": "Counterparty address: EVM 0x + 40 hex, or a Solana base58 address"
}
},
"discoverable": true
},
"output": {
"tier": "full",
"chain": "base",
"facts": {
"kind": "contract",
"token": {
"symbol": "USDC",
"decimals": 6
}
},
"checks": {
"age": {
"at": "2023-08-18T18:36:29.000Z",
"days": 1160,
"basis": "contract creation block",
"block": 2797221,
"known": true
}
},
"intent": "pay",
"address": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
"reasons": [
{
"code": "token_contract",
"text": "This is the USDC token contract itself, not a wallet: tokens sent to a token contract are usually lost.",
"severity": "danger"
},
{
"code": "known_label",
"text": "Known address: USDC (Circle, Base).",
"severity": "good"
},
{
"code": "verified",
"text": "Contract source verified on Sourcify (FiatTokenProxy).",
"severity": "good"
},
{
"code": "established",
"text": "Established: contract creation block 1160 days ago (2023-08-18).",
"severity": "good"
}
],
"summary": "BLOCK: This is the USDC token contract itself, not a wallet: tokens sent to a token contract are usually lost.",
"verdict": "block",
"confidence": "high"
}
},
"maxAmountRequired": "50000",
"maxTimeoutSeconds": 120
}
],
"message": "Payment required: CounterpartyCheck GET /counterpartycheck/v1/full costs $0.05 per call in USDC. Before an agent pays, approves or interacts with an address: ok / caution / block with reasons and a confidence field. Pay per call in USDC with any x402 client: read the PAYMENT-REQUIRED header (x402 v2) or the accepts list in this body (x402 v1), sign the payment and retry the same request with the PAYMENT-SIGNATURE (v2) or X-PAYMENT (v1) header. Networks: Base, Polygon, Arbitrum, Solana. No account, no API key. No crypto wallet? Buy prepaid credits by card or USDC at https://api.youraitools.co/credits/ and send them as a Bearer key. Free: No daily free quota on the paid route; free preview at https://api.youraitools.co/counterpartycheck/v1/preview (rate-limited per minute) and free-tier MCP access via the YourAITools MCP Hub https://api.youraitools.co/mcp/hub.",
"x402Version": 1,
"payment_help": {
"docs": "https://api.youraitools.co/counterpartycheck/",
"tool": "CounterpartyCheck",
"what": "Before an agent pays, approves or interacts with an address: ok / caution / block with reasons and a confidence field. OFAC SDN and ScamSniffer lists, wallet vs contract vs EIP-7702, verification and deployer, ENS / Basename, cross-chain (wrong-chain) check, age, recent activity and exposure, approval magnets, x402 directory presence. EVM (Base, Ethereum, Polygon, Arbitrum) and Solana. A safety check, not advice.",
"price": "$0.05 per call (USDC)",
"route": "GET https://api.youraitools.co/counterpartycheck/v1/full",
"mcp_hub": "https://api.youraitools.co/mcp/hub",
"free_tier": "No daily free quota on the paid route; free preview at https://api.youraitools.co/counterpartycheck/v1/preview (rate-limited per minute) and free-tier MCP access via the YourAITools MCP Hub https://api.youraitools.co/mcp/hub.",
"pay_with_x402": "Pay per call in USDC with any x402 client: read the PAYMENT-REQUIRED header (x402 v2) or the accepts list in this body (x402 v1), sign the payment and retry the same request with the PAYMENT-SIGNATURE (v2) or X-PAYMENT (v1) header. Networks: Base, Polygon, Arbitrum, Solana. No account, no API key.",
"pay_with_credits": {
"url": "https://api.youraitools.co/credits/",
"use": "Send the key as Authorization: Bearer yatc_... on the same request; each call is deducted at the listed price.",
"card": "Pay by card (Stripe): $5, $20 or $50 credit packs, no crypto wallet needed.",
"wallet": "Or buy $1 or $5 of credits in USDC with the one-click browser wallet button on the same page.",
"card_checkout": "https://api.youraitools.co/credits/ (choose a pack under Pay by card; Stripe checkout opens in one click)"
}
}
}Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.05USDC≈ $0.05 USD
on Base · exact scheme
Pay 0.05 USDC on Base to 0x3c1A…08d6F. The signed payment is good for 2 minutes.
- Paid to
- 0x3c1A…08d6F
- USD Coin contract
- 0x8335…02913
- Payment window
- 2 minutes
- As published
- 50000 smallest units
50000units
on Polygon · exact scheme
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- 0x3c1A…08d6F
- Token contract
- 0x3c49…c3359
- Payment window
- 2 minutes
50000units
on Arbitrum · exact scheme
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- 0x3c1A…08d6F
- Token contract
- 0xaf88…e5831
- Payment window
- 2 minutes
50000units
on solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · exact scheme
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- FH73Wb…L2Jte
- Token contract
- EPjFWd…TDt1v
- Payment window
- 2 minutes
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x3c1A1E01e790Cd326495631B3b38Bd7068F08d6F",
"amount": "50000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 120
},
{
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x3c1A1E01e790Cd326495631B3b38Bd7068F08d6F",
"amount": "50000",
"scheme": "exact",
"network": "eip155:137",
"maxTimeoutSeconds": 120
},
{
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x3c1A1E01e790Cd326495631B3b38Bd7068F08d6F",
"amount": "50000",
"scheme": "exact",
"network": "eip155:42161",
"maxTimeoutSeconds": 120
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "GVJJ7rdGiXr5xaYbRwRbjfaJL7fmwRygFi1H6aGqDveb"
},
"payTo": "FH73WbbUe2UyNzfy72MJs5nT3NxyDf9GrqE7kzjL2Jte",
"amount": "50000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 120
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"chain": "base",
"intent": "pay",
"address": "0x3c1A1E01e790Cd326495631B3b38Bd7068F08d6F"
}
},
"output": {
"type": "json",
"example": {
"tier": "full",
"chain": "base",
"facts": {
"kind": "contract",
"token": {
"symbol": "USDC",
"decimals": 6
}
},
"checks": {
"age": {
"at": "2023-08-18T18:36:29.000Z",
"days": 1160,
"basis": "contract creation block",
"block": 2797221,
"known": true
}
},
"intent": "pay",
"address": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
"reasons": [
{
"code": "token_contract",
"text": "This is the USDC token contract itself, not a wallet: tokens sent to a token contract are usually lost.",
"severity": "danger"
},
{
"code": "known_label",
"text": "Known address: USDC (Circle, Base).",
"severity": "good"
},
{
"code": "verified",
"text": "Contract source verified on Sourcify (FiatTokenProxy).",
"severity": "good"
},
{
"code": "established",
"text": "Established: contract creation block 1160 days ago (2023-08-18).",
"severity": "good"
}
],
"summary": "BLOCK: This is the USDC token contract itself, not a wallet: tokens sent to a token contract are usually lost.",
"verdict": "block",
"confidence": "high"
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"address"
],
"properties": {
"chain": {
"enum": [
"base",
"ethereum",
"polygon",
"arbitrum",
"solana"
],
"type": "string",
"description": "Chain of the payment (default base; a base58 address implies solana)"
},
"intent": {
"enum": [
"pay",
"approve",
"interact"
],
"type": "string",
"description": "What you are about to do (default pay): changes which signals matter, e.g. paying a token contract or approving an EOA"
},
"address": {
"type": "string",
"description": "Counterparty address: EVM 0x + 40 hex, or a Solana base58 address"
}
},
"description": "Search intents: full wallet due diligence, address exposure check, drainer approvals check, wallet age, crypto risk report, counterparty aml"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"properties": {
"tier": {
"type": "string"
},
"chain": {
"type": "string"
},
"facts": {
"type": "object"
},
"checks": {
"type": "object"
},
"intent": {
"type": "string"
},
"address": {
"type": "string"
},
"reasons": {
"type": "array"
},
"summary": {
"type": "string"
},
"verdict": {
"type": "string"
},
"confidence": {
"type": "string"
}
}
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-10-25 01:04Z
- Last indexed by Roundhouse
- 2026-10-26 22:40Z
- Last enriched (probe, favicon, geo)
- 2026-10-25 00:16Z
- x402 version
- 2
- Max timeout
- 120s
- Liveness probe
- HTTP 402
Hand this page to an agent
Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.
GET api.roundhouseai.io/v0/endpoints
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service CounterpartyCheck by AgentGate and tell me whether it is worth paying: what a call costs, whether the endpoint answered when last probed, and what its payment record actually shows. curl -s 'https://api.roundhouseai.io/v0/endpoints?q=CounterpartyCheck%20by%20AgentGate' curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>' Then call it: read the price from the live 402 at https://api.youraitools.co/counterpartycheck/v1/full, never from a cached figure, and pay with an x402 client. The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except /v0/unified* and /v0/endpoints. Either pay over x402 (mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.