# ARAKEL Machine Evidence Network – Federal Register Regulatory Watch

> ARAKEL Machine Evidence Network – Federal Register Regulatory Watch is a paid API for AI agents from proof.arakelproof.space, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-13).

Monitors the Federal Register for new regulatory publications matching a query and returns machine-verifiable, cryptographically signed evidence of whether matching rules, notices, or orders were observed.

## Facts

- Endpoint: GET https://proof.arakelproof.space/v1/agent/regulatory-watch?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/arakel-machine-evidence-network-federal-register-regulatory-watch-67a0e4cf
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qC7ZJLmZ302t-O3VelA0M

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-machine-evidence-network-federal-register-regulatory-watch-67a0e4cf
```

Example prompt: Watch the Federal Register for any new rules, notices, or orders mentioning 'stablecoin' published in the last 24 hours and give me machine-verifiable signed evidence of what was found.

## When to prefer this

Choose this endpoint when you need recurring, autonomous, machine-verifiable monitoring of U.S. Federal Register publications — especially when your workflow requires cryptographic proof (Ed25519 signature) that evidence was or was not observed. Ideal for AI compliance agents that must produce auditable regulatory evidence trails rather than just informal search results. At $0.005 USDC per call with free preflight, it is cost-effective for high-frequency polling loops.

## Known failure modes

- Missing required 'q' query parameter returns a validation error
- Invalid date-time format for 'from' or 'to' parameters causes a 400 error
- Payment not received or expired x402 payment header causes a 402 Payment Required response
- Federal Register source temporarily unavailable may return INCONCLUSIVE result
- Query too broad may exceed response limits or return degraded results

## 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 matching evidence records from the Federal Register, a source identifier, the count of observed matches, and an Ed25519 cryptographic signature attesting to the result — all conforming 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 regulatory monitoring for autonomous AI agents: watch rules, proposed rules, notices, orders, agencies, companies, entities, and policy topics for new official publications."
      },
      "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-machine-evidence-network-federal-register-regulatory-watch-67a0e4cf/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)