gov.contract-opportunities

Search ACTIVE US federal contract opportunities (solicitations, combined synopses, sources-sought, RFPs/RFQs) from SAM.gov. Requires a posted-date window: postedFrom and postedTo as MM/DD/YYYY, max 1 year span. Optional filters: title (keyword), naics (NAICS code), state (place/office 2-letter), setAside (set-aside code, e.g. SBA, 8A, WOSB, SDVOSBC), ptype (notice type: o=solicitation, p=presolicitation, r=sources-sought, k=combined, etc.); page with limit (1-100) and offset. Returns each opportunity with notice id, title, solicitation number, type, department path, posted date, response deadline, NAICS, classification, set-aside, active flag, contracting office location, and a sam.gov UI link — plus a total match count. Data: SAM.gov, free and public-domain. Distinct from /api/gov/usaspending-awards (past awards) — this is what is OPEN to bid now. Fresh, time-sensitive data for govcon / capture / bid-intelligence agents.

price

$0.0018 USDC per call

method

GET/api/gov/contract-opportunities

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
`postedFrom`required	string	match ^(0[1-9]\|1[0-2])\/(0[1-9]\|[12]\d\|3[01])\/\d{4}$
`postedTo`required	string	match ^(0[1-9]\|1[0-2])\/(0[1-9]\|[12]\d\|3[01])\/\d{4}$
`title`	string	min 2 chars · max 200 chars
`naics`	string	match ^\d{2,6}$
`state`	string	min 2 chars · max 2 chars
`setAside`	string	min 2 chars · max 12 chars
`ptype`	string	min 1 chars · max 2 chars
`limit`	integer	min 1 · max 100
`offset`	integer	min 0 · max 10000

Code samples

cURLbash

# 1. Probe with no auth → 402 envelope with PaymentRequirements
curl -sS 'https://2s.io/api/gov/contract-opportunities?postedFrom=example&postedTo=example&title=xx&naics=12345&state=xx&setAside=xx&ptype=example&limit=10&offset=0'

# 2. Sign + retry with PAYMENT-SIGNATURE:
curl -sS 'https://2s.io/api/gov/contract-opportunities?postedFrom=example&postedTo=example&title=xx&naics=12345&state=xx&setAside=xx&ptype=example&limit=10&offset=0' \
  -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/contract-opportunities?postedFrom=example&postedTo=example&title=xx&naics=12345&state=xx&setAside=xx&ptype=example&limit=10&offset=0'

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.contractOpportunities({
  "postedFrom": "example",
  "postedTo": "example",
  "title": "xx",
  "naics": "12345",
  "state": "xx",
  "setAside": "xx",
  "ptype": "example",
  "limit": 10,
  "offset": 0
})

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.contract_opportunities(postedFrom="example", postedTo="example", title="xx", naics="12345", state="xx", setAside="xx", ptype="example", limit=10, offset=0)

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.contract-opportunities",
    "arguments": {
      "postedFrom": "example",
      "postedTo": "example",
      "title": "xx",
      "naics": "12345",
      "state": "xx",
      "setAside": "xx",
      "ptype": "example",
      "limit": 10,
      "offset": 0
    }
  }
}

Response

Field	Type	Description
`ok`	boolean	one of: true
`items`	array
`total`	integer	Total matching rows upstream; null when unknown.
`source`	object
`meta`	object

Example response datajson

{
  "ok": true,
  "items": [
    {
      "noticeId": "example",
      "title": "example",
      "solicitationNumber": "example",
      "type": "example",
      "department": "example",
      "postedDate": "example",
      "responseDeadline": "example",
      "naicsCode": "example",
      "classificationCode": "example",
      "setAside": "example",
      "active": false,
      "organizationType": "example",
      "office": {
        "city": "example",
        "state": "example",
        "zip": "example",
        "country": "example"
      },
      "uiLink": "example"
    }
  ],
  "total": 1,
  "source": {
    "provider": "example",
    "url": "example",
    "license": "example"
  },
  "meta": {
    "query": {
      "postedFrom": "example",
      "postedTo": "example",
      "title": "example",
      "naics": "example",
      "state": "example",
      "setAside": "example",
      "ptype": "example",
      "limit": 1,
      "offset": 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.