# ARAKEL Federal Register Watch

> ARAKEL Federal Register Watch is a paid API for AI agents from proof.arakelproof.space, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-11).

Monitors the Federal Register for new rules, notices, executive orders, agencies, or topics matching a search query, returning machine-verifiable signed evidence.

## Facts

- Endpoint: GET https://proof.arakelproof.space/v1/federal-register-watch?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/arakel-federal-register-watch-51faa728
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_JvwkGEfQkgBEyhAb3Kl2L

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 arakel-federal-register-watch-51faa728
```

Example prompt: Watch the Federal Register for any new rules or notices mentioning 'cryptocurrency' published in the last 7 days and give me machine-verifiable signed evidence of what was found.

## When to prefer this

Choose this endpoint when you need cryptographically signed, machine-verifiable evidence from the official Federal Register — especially for compliance, legal, or audit use cases where provenance and tamper-evidence matter. Prefer this over generic web search or news APIs when you need official government source attestation with a verifiable Ed25519 signature, or when you need recurring monitoring of regulatory changes over a defined time window.

## Known failure modes

- Missing required query parameter 'q' returns a validation error
- Invalid date-time format for 'from' or 'to' parameters causes a schema error
- No matching entries in the date range returns NOT_OBSERVED result
- Inconclusive result when the Federal Register source is temporarily unavailable
- Payment failure via x402 if USDC balance is insufficient on Base network

## How this service works

$0.001 OFAC destination-wallet preflight for autonomous agents, plus machine-verifiable official-source evidence over x402 USDC on Base.

## Output

Returns a JSON object with an observation verdict (OBSERVED, NOT_OBSERVED, or INCONCLUSIVE), an array of evidence records from the Federal Register, a cryptographic Ed25519 signature for machine verification, source metadata identifying the federal-register data source, and a count of observed matching documents. The response conforms to the arakel.machine-evidence.v2 schema.

## 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"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "q"
     ],
     "properties": {
      "q": {
       "type": "string",
       "description": "Recurring Federal Register watch for new rules, notices, executive orders, agencies, entities, or topics."
      },
      "to": {
       "type": "string",
       "format": "date-time",
       "description": "Optional UTC end. Defaults to now."
      },
      "from": {
       "type": "string",
       "format": "date-time",
       "description": "Optional UTC start. Defaults to the last 1 days."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "result": "OBSERVED|NOT_OBSERVED|INCONCLUSIVE",
  "schema": "arakel.machine-evidence.v2",
  "source": {
   "id": "federal-register"
  },
  "evidence": [
   {}
  ],
  "signature": {
   "alg": "Ed25519"
  },
  "observed_count": 1
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/arakel-federal-register-watch-51faa728/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from proof.arakelproof.space](https://www.zero.xyz/host/proof.arakelproof.space/llms.txt)