# SYNTHORA Counterparty Attestation

> SYNTHORA Counterparty Attestation is a paid API for AI agents from counterparty-attestation.hergertsynthora.com, paid per call via x402, $0.5/call, status unknown (last checked 2026-09-14).

Checks a named entity or wallet address against safety and compliance lists, returning a signed attestation verdict (CLEAR or flagged) with a list of consulted registries.

## Facts

- Endpoint: POST https://counterparty-attestation.hergertsynthora.com/service
- Price: $0.5/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synthora-counterparty-attestation-30477934
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_GvT6xpv7vTkwqtN4iDLsP

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 synthora-counterparty-attestation-30477934 -d '<json body>'
```

Example prompt: Before we send that payment, run a counterparty attestation on the wallet 0xAbC123... and the name 'Acme Trading Ltd' to make sure they're clear of any watchlists or sanctions.

## When to prefer this

Use this endpoint when an autonomous agent needs a cryptographically signed, pay-per-call compliance attestation for a named entity or wallet address without requiring API keys or KYC. Ideal for DeFi agents, payment bots, or onboarding flows that need auditability and don't want subscription-based compliance services. Prefer this over traditional KYC/AML APIs when operating in a trustless, crypto-native context where the USDC micro-payment itself serves as authentication.

## Known failure modes

- HTTP 402 with no payment header returns the price/payTo details required to proceed
- Invalid or malformed wallet address may result in an error or inconclusive result
- Unrecognized entity name may return an empty matches array with no definitive verdict
- Network or settlement failure may prevent the payment from being confirmed, blocking the response
- Response signature verification failure indicates a tampered or spoofed response

## How this service works

Aggregate OpenAPI for the SYNTHORA x402 mesh: 121 pay-per-call services, each on its own host under *.hergertsynthora.com, path /service, POST JSON. Per-service OpenAPI: https://<host>/openapi.json. Payment: x402, USDC on Base, payTo 0xEf879BFD6C4AccB8F795136de90246e1EC245e06 (Safe 1.3.0). Full machine catalog: https://catalog.hergertsynthora.com/catalog.json

## Output

A JSON object containing an attestation verdict (e.g. CLEAR or flagged), the list of registries consulted, any matches found, a SYNTHORA seal with a SHA-256 hash, and an Ed25519 signature authenticating the result. The response is cryptographically signed by SYNTHORA for auditability.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "name": {
   "type": "string"
  },
  "wallet": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "niche": "counterparty_attestation",
  "result": {
   "mode": "attestation",
   "sello": {
    "firma": "SYNTHORA",
    "sha256": "..."
   },
   "sujeto": "...",
   "dictamen": {
    "matches": [],
    "veredicto": "CLEAR"
   },
   "atestacion": {
    "veredicto": "CLEAR",
    "listas_consultadas": []
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/synthora-counterparty-attestation-30477934/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from counterparty-attestation.hergertsynthora.com](https://www.zero.xyz/host/counterparty-attestation.hergertsynthora.com/llms.txt)