Search FEC Schedule B — every itemized disbursement (spend, vendor payment, operating expenditure, contribution out, transfer) made by a federal political committee (>157M rows). Filter by committeeId, recipient name / city / state, disbursement purpose category (Administrative / Fundraising / Media / Polling / Salary / Travel / Operating / Contribution / Loan / etc.), description text, amount range, cycle, date range. Sort by date or amount. Every row carries: who got paid, when, how much, for what, with link to underlying PDF. The natural pair with /api/gov/fec-contributions for following the money on both sides of any federal committee.
/api/gov/fec-expendituresPAYMENT-SIGNATURE.The fec expenditures API is a pay-per-call gov endpoint built for AI agents and autonomous software. Search FEC Schedule B — every itemized disbursement (spend, vendor payment, operating expenditure, contribution out, transfer) made by a federal political committee (>157M rows).
There is no signup and no API key. An agent (or any HTTP client) hits the endpoint, receives an x402 "402 Payment Required" challenge, signs a sub-cent USDC payment on Base or Solana, and retries — the data comes back on the paid request. That makes it a drop-in fec expenditures data source for an agent tool-use loop, an MCP host, or a backend that needs gov data on demand without onboarding to yet another vendor portal.
| Name | Type | Description |
|---|---|---|
committeeId | string | match ^C\d{8}$ |
recipientName | string | min 1 chars · max 120 chars |
recipientCity | string | min 1 chars · max 80 chars |
recipientState | string | min 2 chars · max 2 chars · match ^[A-Za-z]{2}$ |
disbursementPurposeCategory | string | min 1 chars · max 80 chars |
disbursementDescription | string | min 1 chars · max 160 chars |
minAmount | number | min 0 |
maxAmount | number | min 0 |
twoYearTransactionPeriod | integer | min 1980 · max 2100 |
minDate | string | match ^\d{4}-\d{2}-\d{2}$ |
maxDate | string | match ^\d{4}-\d{2}-\d{2}$ |
perPage | integer | min 1 · max 100 |
page | integer | min 1 |
sortField | string | one of: disbursement_date | disbursement_amount |
sortDirection | string | one of: asc | desc |
# 1. Probe with no auth → 402 envelope with PaymentRequirements curl -sS 'https://2s.io/api/gov/fec-expenditures?committeeId=example&recipientName=example&recipientCity=example&recipientState=xx&disbursementPurposeCategory=example&disbursementDescription=example&minAmount=0&maxAmount=0&twoYearTransactionPeriod=1980&minDate=2024-01-01&maxDate=2024-01-01&perPage=25&page=1&sortField=disbursement_date&sortDirection=asc' # 2. Sign + retry with PAYMENT-SIGNATURE: curl -sS 'https://2s.io/api/gov/fec-expenditures?committeeId=example&recipientName=example&recipientCity=example&recipientState=xx&disbursementPurposeCategory=example&disbursementDescription=example&minAmount=0&maxAmount=0&twoYearTransactionPeriod=1980&minDate=2024-01-01&maxDate=2024-01-01&perPage=25&page=1&sortField=disbursement_date&sortDirection=asc' \ -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-expenditures?committeeId=example&recipientName=example&recipientCity=example&recipientState=xx&disbursementPurposeCategory=example&disbursementDescription=example&minAmount=0&maxAmount=0&twoYearTransactionPeriod=1980&minDate=2024-01-01&maxDate=2024-01-01&perPage=25&page=1&sortField=disbursement_date&sortDirection=asc'
import { TwoS } from '@2sio/sdk'
const client = new TwoS({
privateKey: process.env.EVM_PRIVATE_KEY as `0x${string}`,
})
const result = await client.gov.fecExpenditures({
"committeeId": "example",
"recipientName": "example",
"recipientCity": "example",
"recipientState": "xx",
"disbursementPurposeCategory": "example",
"disbursementDescription": "example",
"minAmount": 0,
"maxAmount": 0,
"twoYearTransactionPeriod": 1980,
"minDate": "2024-01-01",
"maxDate": "2024-01-01",
"perPage": 25,
"page": 1,
"sortField": "disbursement_date",
"sortDirection": "asc"
})
console.log('endpoint:', result.endpoint)
console.log('cost:', result.costUsd, 'USDC')
console.log('tx:', result.settlement?.txHash)
console.log('data:', result.data)import os
from twosio import TwoS
client = TwoS(private_key=os.environ["EVM_PRIVATE_KEY"])
result = client.gov.fec_expenditures(committeeId="example", recipientName="example", recipientCity="example", recipientState="xx", disbursementPurposeCategory="example", disbursementDescription="example", minAmount=0, maxAmount=0, twoYearTransactionPeriod=1980, minDate="2024-01-01", maxDate="2024-01-01", perPage=25, page=1, sortField="disbursement_date", sortDirection="asc")
print("endpoint:", result.endpoint)
print("cost:", result.cost_usd, "USDC")
print("tx:", (result.settlement or {}).get("tx_hash"))
print("data:", result.data)// 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-expenditures",
"arguments": {
"committeeId": "example",
"recipientName": "example",
"recipientCity": "example",
"recipientState": "xx",
"disbursementPurposeCategory": "example",
"disbursementDescription": "example",
"minAmount": 0,
"maxAmount": 0,
"twoYearTransactionPeriod": 1980,
"minDate": "2024-01-01",
"maxDate": "2024-01-01",
"perPage": 25,
"page": 1,
"sortField": "disbursement_date",
"sortDirection": "asc"
}
}
}| Field | Type | Description |
|---|---|---|
ok | boolean | one of: true |
items | array | |
total | integer | Total matching rows upstream; null when unknown. |
source | object | |
page | object |
{
"ok": true,
"items": [
{}
],
"total": 1,
"source": {
"provider": "example",
"url": "example",
"license": "example"
},
"page": {
"number": 1,
"size": 1,
"pages": 1
}
}