EVM address enrichment, counterparty risk and tx screening for agents, paid per call in USDC (x402)
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Counterparty-risk verdict (allow, warn or block, with reasons) for an EVM address on Base, Ethereum, OP Mainnet, Arbitrum or Base Sepolia, for use before paying, approving or trusting it. Checks the OFAC SDN list and the Chainalysis sanctions oracle, account age, EOA or contract, EIP-7702 delegation, upgradeable proxies and code changes in the last 72 h, and token controls (mint, blacklist, pause, fees, owner). Price: $0.02 USDC per call (x402).
EVM chain: ethereum, base, base-sepolia, optimism, arbitrum
20-byte hex address, 0x-prefixed (checksum optional)
warn when the address is younger than this (default 7)
warn when code or proxy implementation changed within this window (default 72)
Pick your client. Values in capitals, like YOUR_TOKEN, are yours to fill in.
claude mcp add --transport http agent-risk-desk https://x402-services.soldano.workers.dev/mcp
Counterparty-risk verdict (allow, warn or block, with reasons) for an EVM address on Base, Ethereum, OP Mainnet, Arbitrum or Base Sepolia, for use before paying, approving or trusting it. Checks the OFAC SDN list and the Chainalysis sanctions oracle, account age, EOA or contract, EIP-7702 delegation, upgradeable proxies and code changes in the last 72 h, and token controls (mint, blacklist, pause, fees, owner). Price: $0.02 USDC per call (x402).
| Argument | Type | Description |
|---|---|---|
| chain* | string | EVM chain: ethereum, base, base-sepolia, optimism, arbitrum |
| address* | string | 20-byte hex address, 0x-prefixed (checksum optional) |
| minAgeDays | number | warn when the address is younger than this (default 7) |
| codeWindowHours | integer | warn when code or proxy implementation changed within this window (default 72) |
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"required": [
"address",
"chain"
],
"properties": {
"chain": {
"enum": [
"ethereum",
"base",
"base-sepolia",
"optimism",
"arbitrum"
],
"type": "string",
"description": "EVM chain: ethereum, base, base-sepolia, optimism, arbitrum"
},
"address": {
"type": "string",
"pattern": "^0x[0-9a-fA-F]{40}$",
"description": "20-byte hex address, 0x-prefixed (checksum optional)"
},
"minAgeDays": {
"type": "number",
"maximum": 3650,
"minimum": 0,
"description": "warn when the address is younger than this (default 7)"
},
"codeWindowHours": {
"type": "integer",
"maximum": 720,
"minimum": 1,
"description": "warn when code or proxy implementation changed within this window (default 72)"
}
}
}Counterparty-risk verdict (allow, warn or block, with reasons) for a NEAR account, for use before paying it. Checks the OFAC SDN list and operator deny-lists, whether the account exists, its age, its contract code and code changes in the last 72 h, global contracts whose publisher can change them, and, with an Allowance vault, the vault denylist and payment history. Price: $0.02 USDC per call (x402).
| Argument | Type | Description |
|---|---|---|
| vault | string | Allowance vault: adds its on-chain denylist and its payment history with this account |
| account* | string | NEAR account id, e.g. alice.near or a 64-hex implicit account |
| network | string | NEAR network; default: testnet for *.testnet accounts, mainnet otherwise |
| minAgeDays | number | warn when the account is younger than this (default 7) |
| codeWindowHours | integer | warn when the contract code changed within this window (default 72) |
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"required": [
"account"
],
"properties": {
"vault": {
"type": "string",
"pattern": "^(([a-z\\d]+[-_])*[a-z\\d]+\\.)*([a-z\\d]+[-_])*[a-z\\d]+$",
"maxLength": 64,
"minLength": 2,
"description": "Allowance vault: adds its on-chain denylist and its payment history with this account"
},
"account": {
"type": "string",
"pattern": "^(([a-z\\d]+[-_])*[a-z\\d]+\\.)*([a-z\\d]+[-_])*[a-z\\d]+$",
"maxLength": 64,
"minLength": 2,
"description": "NEAR account id, e.g. alice.near or a 64-hex implicit account"
},
"network": {
"enum": [
"mainnet",
"testnet"
],
"type": "string",
"description": "NEAR network; default: testnet for *.testnet accounts, mainnet otherwise"
},
"minAgeDays": {
"type": "number",
"maximum": 3650,
"minimum": 0,
"description": "warn when the account is younger than this (default 7)"
},
"codeWindowHours": {
"type": "integer",
"maximum": 720,
"minimum": 1,
"description": "warn when the contract code changed within this window (default 72)"
}
}
}Profile of an EVM address on Base, Ethereum, OP Mainnet or Arbitrum in one call: EOA, contract or EIP-7702 account, age, transactions sent, native and major token balances (USDC, USDT, EURC, DAI, WETH, BTC), Sourcify-verified source and name, proxy and implementation, token metadata, labels (OFAC SDN, Chainalysis oracle, known issuers) and a risk verdict with reasons. Useful to know who an address is before paying, listing or trusting it. Price: $0.01 USDC per call (x402).
| Argument | Type | Description |
|---|---|---|
| chain | string | EVM chain: ethereum, base, base-sepolia, optimism, arbitrum (default base) |
| address* | string | 20-byte hex address, 0x-prefixed (checksum optional) |
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"required": [
"address"
],
"properties": {
"chain": {
"enum": [
"ethereum",
"base",
"base-sepolia",
"optimism",
"arbitrum"
],
"type": "string",
"description": "EVM chain: ethereum, base, base-sepolia, optimism, arbitrum (default base)"
},
"address": {
"type": "string",
"pattern": "^0x[0-9a-fA-F]{40}$",
"description": "20-byte hex address, 0x-prefixed (checksum optional)"
}
}
}Free. Lists the paid tools of this server with their prices, the payment network and asset, and the HTTP endpoints.
No arguments.
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"properties": {}
}Plain-language explanation of an EVM or NEAR transaction: status, method, native and token transfers, approvals (unlimited ones flagged), fee, and a risk verdict for each counterparty, with a one-line summary. Covers Base, Ethereum, OP Mainnet, Arbitrum, Base Sepolia and NEAR. Useful to check what a payment or approval really did. Price: $0.04 USDC per call (x402).
| Argument | Type | Description |
|---|---|---|
| chain* | string | ethereum, base, base-sepolia, optimism, arbitrum, near or near-testnet |
| sender | string | NEAR only: the signer account; required on near-testnet, optional on mainnet |
| txHash* | string | 0x-prefixed 32-byte hash (EVM) or base58 hash (NEAR) |
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"required": [
"chain",
"txHash"
],
"properties": {
"chain": {
"enum": [
"ethereum",
"base",
"base-sepolia",
"optimism",
"arbitrum",
"near",
"near-testnet"
],
"type": "string",
"description": "ethereum, base, base-sepolia, optimism, arbitrum, near or near-testnet"
},
"sender": {
"type": "string",
"pattern": "^(([a-z\\d]+[-_])*[a-z\\d]+\\.)*([a-z\\d]+[-_])*[a-z\\d]+$",
"maxLength": 64,
"minLength": 2,
"description": "NEAR only: the signer account; required on near-testnet, optional on mainnet"
},
"txHash": {
"type": "string",
"maxLength": 66,
"minLength": 43,
"description": "0x-prefixed 32-byte hash (EVM) or base58 hash (NEAR)"
}
}
}Seller-side check that an Allowance vault receipt on NEAR paid a given account at least a given amount, bound to the seller request hash, at final finality. Returns valid or the reason (not paid yet, wrong payee, amount, asset or request, unknown receipt, not a vault) and the vault code hash read at the same block. Price: $0.005 USDC per call (x402).
| Argument | Type | Description |
|---|---|---|
| asset | any | "near" (default) or {"ft": "<NEP-141 token contract>"} |
| nonce | string | alternative to requestHash: the nonce the seller issued; the hash is computed server-side |
| payee* | string | the account that must have been paid (usually the seller itself) |
| vault* | string | Allowance vault account that issued the receipt |
| network | string | NEAR network; default: testnet for *.testnet accounts, mainnet otherwise |
| minAmount* | string | minimum amount in base units: yoctoNEAR, or the token smallest unit when asset is an ft |
| receiptId* | integer | receipt id returned by the vault pay call |
We read every tool's name, description and inputs the way the model will, looking for instructions hidden from you. A clean result means no warning signs, not a guarantee. Scanned Oct 31, 2026.
| requestHash | string | base64(sha256(utf8(nonce))): the 32-byte request hash the receipt must carry |
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"required": [
"vault",
"receiptId",
"payee",
"minAmount"
],
"properties": {
"asset": {
"anyOf": [
{
"type": "string",
"const": "near"
},
{
"type": "object",
"required": [
"ft"
],
"properties": {
"ft": {
"type": "string",
"pattern": "^(([a-z\\d]+[-_])*[a-z\\d]+\\.)*([a-z\\d]+[-_])*[a-z\\d]+$",
"maxLength": 64,
"minLength": 2,
"description": "NEAR account id, e.g. alice.near or a 64-hex implicit account"
}
}
}
],
"description": "\"near\" (default) or {\"ft\": \"<NEP-141 token contract>\"}"
},
"nonce": {
"type": "string",
"maxLength": 256,
"description": "alternative to requestHash: the nonce the seller issued; the hash is computed server-side"
},
"payee": {
"type": "string",
"pattern": "^(([a-z\\d]+[-_])*[a-z\\d]+\\.)*([a-z\\d]+[-_])*[a-z\\d]+$",
"maxLength": 64,
"minLength": 2,
"description": "the account that must have been paid (usually the seller itself)"
},
"vault": {
"type": "string",
"pattern": "^(([a-z\\d]+[-_])*[a-z\\d]+\\.)*([a-z\\d]+[-_])*[a-z\\d]+$",
"maxLength": 64,
"minLength": 2,
"description": "Allowance vault account that issued the receipt"
},
"network": {
"enum": [
"mainnet",
"testnet"
],
"type": "string",
"description": "NEAR network; default: testnet for *.testnet accounts, mainnet otherwise"
},
"minAmount": {
"type": "string",
"pattern": "^\\d{1,40}$",
"description": "minimum amount in base units: yoctoNEAR, or the token smallest unit when asset is an ft"
},
"receiptId": {
"type": "integer",
"maximum": 9007199254740991,
"minimum": 0,
"description": "receipt id returned by the vault pay call"
},
"requestHash": {
"type": "string",
"description": "base64(sha256(utf8(nonce))): the 32-byte request hash the receipt must carry"
}
}
}