# hk-cm-kg.ai Public Record Lookup

> hk-cm-kg.ai Public Record Lookup is a paid API for AI agents from hk-cm-kg.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-13).

Retrieves the public statement of record for a node, product, or estate-scale block on the hk-cm-kg.ai surface, returning an EdDSA-signed receipt resolvable at a permanent URL.

## Facts

- Endpoint: GET https://hk-cm-kg.ai/api?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/hk-cm-kg-ai-public-record-lookup-7c4a7bf2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_mde7uyQBv9INSY3N669V2

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 hk-cm-kg-ai-public-record-lookup-7c4a7bf2
```

Example prompt: Fetch the public statement of record for the market node on hk-cm-kg.ai and give me the signed receipt URL I can use to verify it permanently.

## When to prefer this

Choose this endpoint when you need a cryptographically verifiable, permanently resolvable public record for a node, product, or block on the hk-cm-kg.ai surface — especially when auditability and tamper-evidence via EdDSA signature are required. It is ideal for agentic workflows that must prove a lookup occurred at a specific time with a specific result.

## Known failure modes

- Invalid or missing 'type' or 'method' fields return a 400 Bad Request
- Payment not included or insufficient (below $0.01 USDC) results in a 402 Payment Required
- Non-existent node or record identifier returns a 404 Not Found
- Server-side signing failure may return a 500 Internal Server Error
- Nonce collision or receipt resolution failure may result in an unresolvable receipt URL

## How this service works

One paid call on hk-cm-kg.ai for $0.01 USDC: the surface's own statement of record (a market node: its list_nodes line; a product: its record of record; allooloo.io: the estate scale block), public-record only, with an EdDSA-signed receipt that resolves forever at https://hk-cm-kg.ai/x402/receipt/{nonce}. Doctrine: https://agentic-x402.ai/.

## Output

Returns the public statement of record for the requested surface entity (market node, product, or estate-scale block), accompanied by an EdDSA-signed receipt and a permanent resolution URL in the form https://hk-cm-kg.ai/x402/receipt/{nonce}.

## 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"
    }
   }
  },
  "output": {
   "type": "object"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/hk-cm-kg-ai-public-record-lookup-7c4a7bf2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from hk-cm-kg.ai](https://www.zero.xyz/host/hk-cm-kg.ai/llms.txt)