# Wire-In Lookup — Counterparty Payment Reliability Scoring

> 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.

## Facts

- Endpoint: GET https://underground.substratesymposium.com/api/wire-in?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/wire-in-lookup-counterparty-payment-reliability-scoring-79055b6e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_AeJcC4PwlWcxZzYPrYp1c

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability wire-in-lookup-counterparty-payment-reliability-scoring-79055b6e
```

Example prompt: Before I fulfill this request, check the wire-in payment reliability score for the counterparty with user-agent 'Mozilla/5.0 AgentBot/2.1' — I need to know their verdict and confidence level so I can decide whether to proceed.

## When to prefer this

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.

## Known failure modes

- 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

## 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).

## Request schema (JSON Schema)

```json
{
 "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",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/wire-in-lookup-counterparty-payment-reliability-scoring-79055b6e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from underground.substratesymposium.com](https://www.zero.xyz/host/underground.substratesymposium.com/llms.txt)