Federal counterparty due-diligence dossier on one name, in a single call. Give name (a company or person) and optional state; get back six independent federal/authoritative screens composed into one verdict: SAM.gov registration (UEI/CAGE, active status), SAM federal exclusions (debarment/suspension), OFAC SDN sanctions, GLEIF Legal Entity Identifier, USAspending federal contract-award history, and FARA foreign-agent registration. Returns headline riskFlags (e.g. federally_debarred, sanctions_high_confidence_match, registered_foreign_agent), a cleared boolean (true only when both debarment AND sanctions sources answered and were clean — FARA status is disclosure context and does NOT affect cleared), a summary of booleans, and a per-source found/error/data block so one slow or empty source never fails the whole call. Composition of /api/gov/entity + /api/gov/exclusions + /api/law/sanctions-check + /api/business/lei + /api/gov/usaspending-awards + /api/gov/foreign-agents — all free, public-domain US data. Name matching is probabilistic: review flagged matches manually and confirm with a hard identifier (UEI, LEI) before acting. For vendor onboarding, KYC/AML triage, grant eligibility, and procurement integrity. The federal counterpart to /api/business/entity-screen (which covers state registries).
/api/gov/counterpartyPAYMENT-SIGNATURE.The counterparty API is a pay-per-call gov endpoint built for AI agents and autonomous software. Federal counterparty due-diligence dossier on one name, in a single call.
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 counterparty 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 |
|---|---|---|
namerequired | string | min 2 chars · max 200 chars |
state | string | min 2 chars · max 2 chars |
threshold | number | min 0.1 · max 1 |
limit | integer | min 1 · max 20 |
# 1. Probe with no auth → 402 envelope with PaymentRequirements curl -sS 'https://2s.io/api/gov/counterparty?name=xx&state=xx&threshold=0.4&limit=5' # 2. Sign + retry with PAYMENT-SIGNATURE: curl -sS 'https://2s.io/api/gov/counterparty?name=xx&state=xx&threshold=0.4&limit=5' \ -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/counterparty?name=xx&state=xx&threshold=0.4&limit=5'
import { TwoS } from '@2sio/sdk'
const client = new TwoS({
privateKey: process.env.EVM_PRIVATE_KEY as `0x${string}`,
})
const result = await client.gov.counterparty({
"name": "xx",
"state": "xx",
"threshold": 0.4,
"limit": 5
})
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.counterparty(name="xx", state="xx", threshold=0.4, limit=5)
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.counterparty",
"arguments": {
"name": "xx",
"state": "xx",
"threshold": 0.4,
"limit": 5
}
}
}| Field | Type | Description |
|---|---|---|
query | object | |
riskFlags | array | |
cleared | boolean | |
summary | object | |
registration | object | |
exclusions | object | |
sanctions | object | |
lei | object | |
federalAwards | object | |
foreignAgent | object | |
sources | array | |
note | string |
{
"query": {
"name": "example",
"state": "example"
},
"riskFlags": [
"example"
],
"cleared": false,
"summary": {
"samRegistered": false,
"activeRegistration": false,
"isDebarred": false,
"isSanctioned": false,
"hasLei": false,
"federalAwardCount": 1,
"isForeignAgent": false
},
"registration": {
"found": false,
"error": "example",
"data": {}
},
"exclusions": {
"found": false,
"error": "example",
"data": {}
},
"sanctions": {
"found": false,
"error": "example",
"data": {}
},
"lei": {
"found": false,
"error": "example",
"data": {}
},
"federalAwards": {
"found": false,
"error": "example",
"data": {}
},
"foreignAgent": {
"found": false,
"error": "example",
"data": {}
},
"sources": [
{
"provider": "example",
"url": "example",
"license": "example"
}
],
"note": "example"
}