# Rubric Protocol Agent Record Attestation

> Rubric Protocol Agent Record Attestation is a paid API for AI agents from rubric-protocol.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).

Returns an unforgeable operating history for any AI agent — record count, first-seen date, continuity days, and recent activity — derived from HCS-anchored attestations that cannot be backdated.

## Facts

- Endpoint: GET https://rubric-protocol.com/v1/x402/agent-record/rubric-assert
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/rubric-protocol-agent-record-attestation-4ea5a0a7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_p53hHspJekW5jXd9C7Uqk

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 rubric-protocol-agent-record-attestation-4ea5a0a7
```

Example prompt: Pull the Rubric Protocol operating record for this agent and tell me its total attestation count, when it first appeared, and how many continuity days it has — I need to know if its history is genuine and can't be backdated.

## When to prefer this

Choose this endpoint when you need tamper-proof, unforgeable operating history for an AI agent anchored to Hedera's public ledger — especially when evaluating agent trustworthiness before delegation, detecting fake or backdated track records, or proving legitimate continuity to a third party. Prefer this over self-reported agent metadata or off-chain logs whenever the verifiability of the history matters.

## Known failure modes

- Agent identifier not found — no attestation history exists for the given agent, returns empty or 404-equivalent
- HCS node connectivity issues causing delayed or unavailable attestation data
- Invalid or malformed agent identifier input
- Rate limiting or payment failure for the $0.005 USDC per-call fee
- Attestation data temporarily inconsistent during Hedera mirror node sync lag

## How this service works

Unforgeable operating history for any AI agent attesting through Rubric Protocol: record count, first-seen date, continu

## Output

Returns an attested operating record for the specified AI agent including: total number of HCS-anchored attestations, the date the agent first appeared on-chain, the number of continuous active days, and recent activity metrics — all sourced from Hedera mainnet and cryptographically guaranteed against backdating.

## 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"
    },
    "pathParams": {
     "type": "object",
     "required": [
      "agentId"
     ],
     "properties": {
      "agentId": {
       "type": "string"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "format": {
     "type": "string"
    },
    "example": {}
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/rubric-protocol-agent-record-attestation-4ea5a0a7/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from rubric-protocol.com](https://www.zero.xyz/host/rubric-protocol.com/llms.txt)