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Nomos Counterparty Intelligence API
x402
Nomos Counterparty Intelligence API is a paid API for AI agents from base-agent-preflight.bytoken2023.workers.dev, paid per call via x402, $0.5/call, status unknown (last checked 2026-09-14).
Returns identity, risk score, and behavioral summary for a wallet address based on its on-chain counterparty activity over a specified lookback window.
Price / call$0.5
Success—
StatusUnknown
How this service works
Machine-payable service intelligence for discovering, verifying, and monitoring identity, risk, authorization, execution-preflight, and evidence APIs before autonomous agents spend.
Output
A JSON object containing the network identifier, product name, a risk assessment with risk_level (e.g. 'low', 'medium', 'high'), a numeric risk_score, and a flags array listing any specific risk signals. Additional fields may include identity, activity, and provenance objects summarizing behavioral context for the queried wallet.
Example use cases
Pre-payment wallet risk check
“I'm about to pay 0xAbCd1234567890abcdef1234567890abcdef1234 on Base — can you pull a counterparty risk profile for the last 7 days and tell me if there are any red flags before I proceed?”
DeFi counterparty due diligence
“We're onboarding a new liquidity partner at 0x9f2aB3C4d5E6f7a8B9c0D1e2F3a4B5c6D7e8F901 on Ethereum — run a 30-day counterparty intelligence report and summarize their risk level and main activity categories, top 5 please.”
Agent autonomous payment guard
“Before my agent sends any USDC payout, check the recipient wallet 0x1A2b3C4d5E6f7A8B9c0D1E2f3A4b5C6d7E8F9a0 on Base against the last 10 days of on-chain counterparty data to make sure it scores low risk.”
Technical details
Endpoint
POSThttps://base-agent-preflight.bytoken2023.workers.dev/x402/v1/wallet/counterparty-intelligenceWhen to prefer
Use this endpoint when an autonomous agent needs a fast, pay-per-request risk and identity preflight check on a wallet address before executing a transaction, approving a payment, or onboarding a counterparty. It is specifically suited for Base and Ethereum wallets, offers bounded lookback windows (1–30 days), and returns structured risk scores with flags — ideal for programmatic go/no-go decisions without requiring a full KYC integration or ongoing subscription.
Side effects
- Invalid wallet address format (must match 0x + 40 hex chars) returns validation error
- Unsupported chain value (only 'ethereum' and 'base' accepted) returns enum error
- lookback_days exceeding 30 or limit exceeding 10 returns schema validation failure
- Insufficient USDC payment (x402 payment not included or underpaid) returns 402 Payment Required
- Wallet with no transaction history in the window may return empty or minimal response
- Network timeouts or upstream data unavailability may result in 5xx errors
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"network": "eip155:8453",
"product": "nomos-counterparty-intelligence",
"assessment": {
"flags": [],
"risk_level": "low",
"risk_score": 0
}
}
}Tags
x402
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