# agent-kg.ai Office Facts API

> agent-kg.ai Office Facts API is a paid API for AI agents from agent-kg.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Returns a signed, receipted JSON document of Matthew Keddy's private office facts (holdings, tenancies, keys, rulings, RADAR) with an EdDSA-signed payment receipt for $0.01 USDC.

## Facts

- Endpoint: GET https://agent-kg.ai/api
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agent-kg-ai-office-facts-api-39f8e6f4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_gXFh1v9GCs9kHkNoYHVxB

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 agent-kg-ai-office-facts-api-39f8e6f4
```

Example prompt: Fetch the official receipted facts document for Matthew Keddy's agentic private office — I want the EdDSA-signed copy with the permanent receipt URL so I can verify the holdings, tenancies, and keys on record.

## When to prefer this

Choose this endpoint when you need a cryptographically attested, receipted copy of Matthew Keddy's office facts (holdings, tenancies, keys, rulings, RADAR) that can be permanently verified via receipt URL. Prefer it over the free /facts.json endpoint when provenance, auditability, or downstream verification is required. Best suited for agentic workflows that must prove data provenance with an EdDSA signature.

## Known failure modes

- Payment not included or insufficient USDC — returns 402 Payment Required
- Invalid HTTP method (non-GET/HEAD) — returns 405 Method Not Allowed
- Network or server unavailability — returns 503
- Receipt nonce URL not yet indexed — /x402/receipt/{nonce} may return 404 briefly after issuance

## How this service works

The office facts of record for $0.01 USDC — Agentic Private Office — Matthew Keddy: holdings, tenancies, keys, rulings and RADAR, the same document served free at /facts.json. The payment buys the receipted call: an EdDSA-signed receipt (kid mk-office-x402-2026-09) that resolves forever at /x402/receipt/{nonce}.

## Output

A JSON document containing Matthew Keddy's office facts (holdings, tenancies, keys, rulings, RADAR), accompanied by an EdDSA-signed receipt (key ID mk-office-x402-2026-09) and a permanent receipt URL at /x402/receipt/{nonce} that resolves indefinitely as proof of the paid, attested call.

## 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"
     ],
     "type": "string"
    }
   }
  },
  "output": {
   "type": "object",
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agent-kg-ai-office-facts-api-39f8e6f4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agent-kg.ai](https://www.zero.xyz/host/agent-kg.ai/llms.txt)