# AgentToll Federal Register Search

> AgentToll Federal Register Search is a paid API for AI agents from agenttoll.dev, paid per call via x402, $0.03/call, status unknown (last checked 2026-09-14).

Search and retrieve documents from the U.S. Federal Register by type, query, or issuing agency

## Facts

- Endpoint: POST https://agenttoll.dev/paid/legal/federal-register
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agenttoll-federal-register-search-89ec295a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_E1uoHdDaZHdSbuH-sp4gV

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 agenttoll-federal-register-search-89ec295a -d '<json body>'
```

Example prompt: Search the Federal Register for any proposed rules from the EPA about carbon emissions — pull back whatever documents are available.

## When to prefer this

Use this endpoint when you need structured, programmatic access to U.S. Federal Register content — proposed rules, final rules, notices, and presidential documents — especially when filtering by agency or keyword. Prefer this over manual web searches when an AI agent needs to retrieve regulatory data as part of an automated workflow, compliance check, or policy research task. It is pay-per-call at $0.03 USDC via x402, making it suitable for targeted queries rather than bulk archival ingestion.

## Known failure modes

- Empty result set if query terms match no Federal Register documents
- Missing or invalid agency name returns no results or generic results
- Overly broad queries may return large unfiltered datasets
- Service unavailability or upstream Federal Register API downtime
- Invalid document type enum value may return error or empty response

## How this service works

108+ receipt-backed x402 work products for AI agents. Clear prices, spend caps, buyer metadata, and structured results over Base USDC.

## Output

Returns a JSON object containing an array or object of matching Federal Register documents in the `data` field, along with metadata including total result count, the data source identifier, and a timestamp of when the response was generated. A `cached` flag indicates if the result came from cache, and `success` confirms the request status.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "type": {
   "type": "string"
  },
  "query": {
   "type": "string"
  },
  "agency": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "data": {
   "oneOf": [
    {
     "type": "array"
    },
    {
     "type": "object"
    }
   ]
  },
  "meta": {
   "type": "object",
   "properties": {
    "count": {
     "type": "integer"
    },
    "source": {
     "type": "string"
    },
    "generated_at": {
     "type": "string",
     "format": "date-time"
    }
   }
  },
  "cached": {
   "type": "boolean"
  },
  "success": {
   "type": "boolean"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agenttoll-federal-register-search-89ec295a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agenttoll.dev](https://www.zero.xyz/host/agenttoll.dev/llms.txt)