# Mudko Counterparty Trust Verifier

> Mudko Counterparty Trust Verifier is a paid API for AI agents from mudko.com, paid per call via x402, $0.25/call, status unknown (last checked 2026-09-15).

Verifies the trustworthiness of a domain by checking its DNSSEC, DNS-AID records, agent-card, live MCP endpoint, JWKS, OASF record, and x402/commerce declarations, returning a 0-100 trust score with per-artifact evidence.

## Facts

- Endpoint: GET https://mudko.com/api/x402/verify-counterparty
- Price: $0.25/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/mudko-counterparty-trust-verifier-09e60e61
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_rwdNUEkoGmDnPlK_c77_0

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 mudko-counterparty-trust-verifier-09e60e61
```

Example prompt: Before we send payment to api.example.com, can you run a trust check on that domain and tell me its trust score and whether it has valid DNSSEC, an agent-card, and x402 commerce declarations?

## When to prefer this

Use this endpoint when an AI agent needs to vet a counterparty domain before initiating an automated transaction, API call, or agent-to-agent interaction. It is specifically suited for x402-aware workflows and agent ecosystems where trust artifacts (DNSSEC, agent-card, MCP, JWKS, OASF, x402) are the standard signals, rather than generic domain reputation or WHOIS lookups.

## Known failure modes

- Domain parameter missing — returns validation error
- Domain does not exist or is unreachable — artifacts may all fail checks, trust score near 0
- DNSSEC lookup times out — partial evidence returned
- Network error reaching MCP or JWKS endpoints — artifacts marked as unavailable
- Invalid domain format — returns input error

## How this service works

Counterparty trust verification for agents: before transacting with a domain, verify its trust artifacts — DNSSEC + DNS-AID records, agent-card, live MCP endpoint, published JWKS, OASF record, x402/commerce declarations. Returns a 0-100 trust score with per-artifact evidence. $0.25 per lookup.

## Output

Returns a structured object containing a 0-100 trust score, an overall verdict string, and per-artifact evidence covering DNSSEC status, DNS-AID records, agent-card presence, live MCP endpoint reachability, published JWKS, OASF record, and x402/commerce declarations for the queried domain.

## 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",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "domain"
     ],
     "properties": {
      "domain": {
       "type": "string",
       "description": "Domain to verify (required)."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "domain": {
       "type": "string"
      },
      "verdict": {
       "type": "string"
      },
      "artifacts": {
       "type": "object"
      },
      "trust_score": {
       "type": "number"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/mudko-counterparty-trust-verifier-09e60e61/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mudko.com](https://www.zero.xyz/host/mudko.com/llms.txt)