# Macaroon Network Federal Register Search

> Macaroon Network Federal Register Search is a paid API for AI agents from api.macaroonnetwork.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).

Search U.S. federal regulatory documents in the Federal Register by keyword, document type, agency, and date range

## Facts

- Endpoint: POST https://api.macaroonnetwork.com/execute/federal-register-search-v1
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/macaroon-network-federal-register-search-fa330f66
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_dSYofExSA7VQewWnfdpYJ

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 macaroon-network-federal-register-search-fa330f66 -d '<json body>'
```

Example prompt: Search the Federal Register for proposed rules from the EPA published between January 1, 2024 and June 30, 2024 related to air quality standards.

## When to prefer this

Use this endpoint when you need to search official U.S. federal regulatory documents — final rules, proposed rules, notices, or presidential documents — directly from the Federal Register's authoritative public API. Prefer this over general web search when you need structured, filtered, and source-verified regulatory data with agency and date precision. Ideal for compliance research, regulatory monitoring, legal analysis, and policy tracking tasks that require citable government sources.

## Known failure modes

- No documents match the given keyword/agency/date combination — returns empty result set
- Invalid date range format causes request failure
- Unsupported document type value causes validation error
- Federal Register API upstream outage results in error response
- Overly broad keyword returns too many results or truncated response
- Agency name not recognized or misspelled returns empty results

## How this service works

Search U.S. federal regulatory documents -- final rules, proposed rules, notices, and presidential documents -- by keyword, document type, issuing agency, and publication date range. The only source used is the Federal Register's own public API (federalregister.gov), published by the National Archives and Records Administration's Office of the Federal Register.

## Output

A structured list of matching federal regulatory documents from the Federal Register, including document type (final rule, proposed rule, notice, presidential document), issuing agency, publication date, title, and likely links or identifiers to the full document on federalregister.gov.

## 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",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "type": "object"
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST",
      "PUT",
      "PATCH"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/macaroon-network-federal-register-search-fa330f66/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.macaroonnetwork.com](https://www.zero.xyz/host/api.macaroonnetwork.com/llms.txt)