health.hospital-lookup

CMS Care Compare lookup for every CMS-certified US hospital (~5k). Lookup by 6-digit CMS Facility ID for direct match, or fuzzy by name + state + city + hospital type, with optional minimum overall rating (1-5) filter. Each record includes facility ID, name, full address, phone, hospital type (Acute Care / Critical Access / Psychiatric / etc.), ownership category, emergency services flag, birthing-friendly designation, CMS overall star rating, and per-measure-group counts (mortality, safety, readmission, patient experience, effectiveness, timeliness, medical imaging). Public-domain federal data.

price

$0.0012 USDC per call

method

GET/api/health/hospital-lookup

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
`facilityId`	string	match ^\d{6}$
`name`	string	min 2 chars · max 200 chars
`city`	string	min 2 chars · max 100 chars
`state`	string	min 2 chars · max 2 chars · match ^[A-Za-z]{2}$
`hospitalType`	string	min 2 chars · max 80 chars
`minRating`	integer	min 1 · max 5
`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/health/hospital-lookup?facilityId=12345&name=xx&city=xx&state=xx&hospitalType=xx&minRating=1&limit=20&offset=0'

# 2. Sign + retry with PAYMENT-SIGNATURE:
curl -sS 'https://2s.io/api/health/hospital-lookup?facilityId=12345&name=xx&city=xx&state=xx&hospitalType=xx&minRating=1&limit=20&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/health/hospital-lookup?facilityId=12345&name=xx&city=xx&state=xx&hospitalType=xx&minRating=1&limit=20&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.health.hospitalLookup({
  "facilityId": "12345",
  "name": "xx",
  "city": "xx",
  "state": "xx",
  "hospitalType": "xx",
  "minRating": 1,
  "limit": 20,
  "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.health.hospital_lookup(facilityId="12345", name="xx", city="xx", state="xx", hospitalType="xx", minRating=1, limit=20, 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": "health.hospital-lookup",
    "arguments": {
      "facilityId": "12345",
      "name": "xx",
      "city": "xx",
      "state": "xx",
      "hospitalType": "xx",
      "minRating": 1,
      "limit": 20,
      "offset": 0
    }
  }
}

Response

Field	Type	Description
`query`	object
`totalCount`	integer
`returned`	integer
`hospitals`	array
`source`	object

Example response datajson

{
  "query": {
    "facilityId": "example",
    "name": "example",
    "city": "example",
    "state": "example",
    "hospitalType": "example",
    "minRating": 1,
    "limit": 1,
    "offset": 1
  },
  "totalCount": 1,
  "returned": 1,
  "hospitals": [
    {
      "facilityId": "example",
      "name": "example",
      "address": "example",
      "city": "example",
      "state": "example",
      "zipcode": "example",
      "county": "example",
      "phone": "example",
      "hospitalType": "example",
      "ownership": "example",
      "hasEmergencyServices": false,
      "meetsBirthingFriendlyCriteria": false,
      "overallRating": 1,
      "mortalityGroupCount": 1,
      "safetyGroupCount": 1,
      "readmissionGroupCount": 1,
      "experienceGroupCount": 1,
      "effectivenessGroupCount": 1,
      "timelinessGroupCount": 1,
      "imagingGroupCount": 1
    }
  ],
  "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.