gov.federal-register-recent

Newest Federal Register documents by publication date — chronological feed for compliance change-detection. Filter by document type (RULE / PRORULE / NOTICE / PRESDOCU), agency name, and publication date range. Each record includes document number, type, title, abstract, publication date, effective date, agencies, citations (CFR/USC), HTML + PDF URLs. Defaults to last 7 days of final rules. Free public-domain data from federalregister.gov.

price

$0.0024 USDC per call

method

GET/api/gov/federal-register-recent

payment

x402 v2 · USDC on Base (EIP-3009) or Solana (SPL transfer)

auth

None. Sign the payment, retry with PAYMENT-SIGNATURE.

tier

Tier 0 — no paid upstream

Parameters

Name	Type	Description
`type`	string	Document type: RULE = final rules, PRORULE = proposed rules, NOTICE = notices, PRESDOCU = presidential docs. one of: RULE \| PRORULE \| NOTICE \| PRESDOCU
`agency`	string	Agency slug or name (e.g., "environmental-protection-agency", "federal-trade-commission"). min 2 chars · max 80 chars
`since`	string	Earliest publication date (YYYY-MM-DD). Default = 7 days ago. match ^\d{4}-\d{2}-\d{2}$
`until`	string	Latest publication date (YYYY-MM-DD). Default = today. match ^\d{4}-\d{2}-\d{2}$
`limit`	integer	Max results (1-100). Default 25. min 1 · max 100
`page`	integer	Page number (1-based). Default 1. min 1 · max 1000

Code samples

cURLbash

# 1. Probe with no auth → 402 envelope with PaymentRequirements
curl -sS 'https://2s.io/api/gov/federal-register-recent?type=RULE&agency=xx&since=2024-01-01&until=2024-01-01&limit=25&page=1'

# 2. Sign + retry with PAYMENT-SIGNATURE:
curl -sS 'https://2s.io/api/gov/federal-register-recent?type=RULE&agency=xx&since=2024-01-01&until=2024-01-01&limit=25&page=1' \
  -H 'PAYMENT-SIGNATURE: <base64-json-payload>'

# Or use the canonical runner (handles probe → sign → retry):
#   EVM_PRIVATE_KEY=0x... node --env-file=.env.local \
#     --experimental-strip-types scripts/x402-pay.ts \
#     'https://2s.io/api/gov/federal-register-recent?type=RULE&agency=xx&since=2024-01-01&until=2024-01-01&limit=25&page=1'

TypeScript / Node — @2sio/sdktypescript

import { TwoS } from '@2sio/sdk'

const client = new TwoS({
  privateKey: process.env.EVM_PRIVATE_KEY as `0x${string}`,
})

const result = await client.gov.federalRegisterRecent({
  "type": "RULE",
  "agency": "xx",
  "since": "2024-01-01",
  "until": "2024-01-01",
  "limit": 25,
  "page": 1
})

console.log('endpoint:', result.endpoint)
console.log('cost:', result.costUsd, 'USDC')
console.log('tx:', result.settlement?.txHash)
console.log('data:', result.data)

Python — 2siopython

import os
from twosio import TwoS

client = TwoS(private_key=os.environ["EVM_PRIVATE_KEY"])

result = client.gov.federal_register_recent(type="RULE", agency="xx", since="2024-01-01", until="2024-01-01", limit=25, page=1)

print("endpoint:", result.endpoint)
print("cost:", result.cost_usd, "USDC")
print("tx:", (result.settlement or {}).get("tx_hash"))
print("data:", result.data)

MCP — Claude Desktop / AgentKit / any MCP hostjson

// 1. Add @2sio/mcp to your MCP host config (Claude Desktop example below).
//    EVM_PRIVATE_KEY funds x402 payments per call.

// claude_desktop_config.json
{
  "mcpServers": {
    "2sio": {
      "command": "npx",
      "args": ["-y", "@2sio/mcp"],
      "env": { "EVM_PRIVATE_KEY": "0x..." }
    }
  }
}

// 2. Once the server is running, agents call this tool via standard MCP:

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "gov.federal-register-recent",
    "arguments": {
      "type": "RULE",
      "agency": "xx",
      "since": "2024-01-01",
      "until": "2024-01-01",
      "limit": 25,
      "page": 1
    }
  }
}

Response

Field	Type	Description
`query`	object
`totalCount`	integer
`returned`	integer
`hasNext`	boolean
`documents`	array
`source`	object

Example response datajson

{
  "query": {
    "type": "example",
    "agency": "example",
    "since": "example",
    "until": "example",
    "limit": 1,
    "page": 1
  },
  "totalCount": 1,
  "returned": 1,
  "hasNext": false,
  "documents": [
    {
      "documentNumber": "example",
      "type": "example",
      "title": "example",
      "abstract": "example",
      "publicationDate": "example",
      "effectiveOn": "example",
      "agencies": [
        "example"
      ],
      "citations": [
        "example"
      ],
      "htmlUrl": "https://example.com",
      "pdfUrl": "https://example.com"
    }
  ],
  "source": {
    "provider": "example",
    "url": "https://example.com",
    "license": "example"
  }
}

Discovery

/api/directory — full catalog of every endpoint
/openapi.json — OpenAPI 3.1 spec (per-op x-payment-info, x402Payment security)
/.well-known/x402 — machine-readable service descriptor for x402-aware crawlers
/.well-known/mcp/server-card.json — MCP SEP-1649 server card
/llms.txt — plain-text manifest for LLM ingestion

2s.io is x402-native. Every call is paid per-request from a USDC-funded EVM wallet on Base — no signup, no API keys, no monthly fees. Source code: github.com/2s-io/sdk.