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Wire-In Lookup — Counterparty Payment Reliability Scoring
x402
Wire-In Lookup — Counterparty Payment Reliability Scoring is a paid API for AI agents from underground.substratesymposium.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-14).
Returns a signed, per-entity payment-reliability verdict (score, confidence, verdict label, observed counts, Ed25519 attestation) for a given counterparty user-agent or wallet address.
Price / call$0.01
Success—
StatusUnknown
How this service works
Wire-In Lookup — per-entity merchant-seat verdict. Pass ?ua=<counterparty-UA>; get ONE signed row: score (0.0-1.0 payment-reliability observed at this seat), confidence, verdict (settled | attempted_payment | probe_only | low_signal | unknown), observed counts, Ed25519 attestation. $0.01 USDC/entity on Base or Solana. Fold the score into your own counterparty model — wire it into your scoring loop. Wallet lookup (?wallet=) is v2.
Output
A single signed row containing: a payment reliability score from 0.0 to 1.0, a confidence value, a verdict label (one of: settled, attempted_payment, probe_only, low_signal, or unknown), observed payment counts, and an Ed25519 attestation signature — all scoped to the queried counterparty entity (UA or wallet).
Example use cases
Pre-transaction counterparty risk check
“Before sending goods to this buyer, look up their payment reliability score using their user-agent string 'ShoppingBot/3.0 (compatible; Agent)' — give me the verdict and confidence so I know if they've actually settled payments before.”
Agent fleet payment gating
“My agent marketplace needs to gate access based on payment reliability — can you fetch the wire-in verdict for the counterparty UA 'AutoAgent/1.0' and tell me if their score is above 0.7 before I let them through?”
Wallet address payment history lookup
“I want to check the payment reliability record for wallet address 0xAbC123...def on Base — pull the wire-in score, verdict, and Ed25519 attestation so I can fold it into my risk model.”
Technical details
Endpoint
GEThttps://underground.substratesymposium.com/api/wire-in?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a cryptographically attested, per-entity payment reliability verdict before transacting with an unknown counterparty in an agent-to-agent or merchant context — especially when integrating into an automated scoring loop that requires a signed, machine-readable signal. Prefer this over generic reputation APIs when you need Ed25519 attestation and x402-native pricing, or when scoring counterparties by user-agent identity in addition to wallet address.
Side effects
- Missing required query parameter (?ua= or ?wallet=) returns an error or empty response
- Unknown or first-seen counterparty returns verdict 'unknown' with low confidence
- Insufficient payment history returns verdict 'low_signal'
- Payment of $0.01 USDC not completed results in 402 or access denied
- Invalid UA string format may produce unreliable or no match
- Wallet lookup (?wallet=) marked as v2 — may have limited coverage or stability
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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