gov.fec-candidate

Search US federal political candidates via the OpenFEC API. Filter by free-text q (name match), candidate ID (e.g. H0VA01076), state, district, party (DEM, REP, IND, LIB, GRE, etc.), office (P=President | S=Senate | H=House), election cycle (even years), election year, and hasRaised (only candidates with reported receipts). Returns FEC candidate ID, name, party, office, state/district, incumbency status, active-through cycle, first/last file dates, cycles, principal committee linkage. Use the candidate ID returned here to fetch their committees with /api/gov/fec-committee.

price

$0.0012 USDC per call

method

GET/api/gov/fec-candidate

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
`q`	string	min 1 chars · max 120 chars
`candidateId`	string	match ^[A-Z]\d[A-Z0-9]{7}$
`state`	string	min 2 chars · max 2 chars · match ^[A-Za-z]{2}$
`district`	string	match ^\d{2}$
`party`	string	match ^[A-Za-z]{3,4}$
`office`	string	one of: P \| S \| H
`cycle`	integer	min 1980 · max 2100
`electionYear`	integer	min 1980 · max 2100
`hasRaised`	boolean
`perPage`	integer	min 1 · max 100
`page`	integer	min 1

Code samples

cURLbash

# 1. Probe with no auth → 402 envelope with PaymentRequirements
curl -sS 'https://2s.io/api/gov/fec-candidate?q=example&candidateId=example&state=xx&district=12345&party=example&office=P&cycle=1980&electionYear=1980&hasRaised=false&perPage=25&page=1'

# 2. Sign + retry with PAYMENT-SIGNATURE:
curl -sS 'https://2s.io/api/gov/fec-candidate?q=example&candidateId=example&state=xx&district=12345&party=example&office=P&cycle=1980&electionYear=1980&hasRaised=false&perPage=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/fec-candidate?q=example&candidateId=example&state=xx&district=12345&party=example&office=P&cycle=1980&electionYear=1980&hasRaised=false&perPage=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.fecCandidate({
  "q": "example",
  "candidateId": "example",
  "state": "xx",
  "district": "12345",
  "party": "example",
  "office": "P",
  "cycle": 1980,
  "electionYear": 1980,
  "hasRaised": false,
  "perPage": 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.fec_candidate(q="example", candidateId="example", state="xx", district="12345", party="example", office="P", cycle=1980, electionYear=1980, hasRaised=False, perPage=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.fec-candidate",
    "arguments": {
      "q": "example",
      "candidateId": "example",
      "state": "xx",
      "district": "12345",
      "party": "example",
      "office": "P",
      "cycle": 1980,
      "electionYear": 1980,
      "hasRaised": false,
      "perPage": 25,
      "page": 1
    }
  }
}

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.