gov.nfip-claims

FEMA National Flood Insurance Program (NFIP) claims history for a US location — the flood losses actually paid out in an area. Requires state (2-letter); optionally narrow by county (5-digit FIPS), ZIP, and yearOfLoss range (yearFrom/yearTo). Returns the total matching claim count plus recent redacted claim records (date of loss, county / census tract / ZIP, flood zone rated at time of loss, cause of damage, water depth, net building + contents payment in USD, building coverage, approximate lat/lon), largest net payout first (the notable losses). FEMA redacts the city field, so filter by county FIPS or ZIP. Free, public-domain (OpenFEMA). Distinct from geo.flood-zone (current SFHA designation) and gov.risk-index (modeled future risk): this is the realized loss track record — for insurance underwriting and property due diligence.

price

$0.0018 USDC per call

method

GET/api/gov/nfip-claims

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
`state`required	string	2-letter US state/territory code. min 2 chars · max 2 chars
`county`	string	match ^\d{5}$
`zip`	string	match ^\d{5}$
`yearFrom`	integer	min 1970 · max 2100
`yearTo`	integer	min 1970 · max 2100
`limit`	integer	min 1 · max 50

Code samples

cURLbash

# 1. Probe with no auth → 402 envelope with PaymentRequirements
curl -sS 'https://2s.io/api/gov/nfip-claims?state=xx&county=12345&zip=12345&yearFrom=1970&yearTo=1970&limit=1'

# 2. Sign + retry with PAYMENT-SIGNATURE:
curl -sS 'https://2s.io/api/gov/nfip-claims?state=xx&county=12345&zip=12345&yearFrom=1970&yearTo=1970&limit=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/nfip-claims?state=xx&county=12345&zip=12345&yearFrom=1970&yearTo=1970&limit=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.nfipClaims({
  "state": "xx",
  "county": "12345",
  "zip": "12345",
  "yearFrom": 1970,
  "yearTo": 1970,
  "limit": 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.nfip_claims(state="xx", county="12345", zip="12345", yearFrom=1970, yearTo=1970, limit=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.nfip-claims",
    "arguments": {
      "state": "xx",
      "county": "12345",
      "zip": "12345",
      "yearFrom": 1970,
      "yearTo": 1970,
      "limit": 1
    }
  }
}

Response

Field	Type	Description
`query`	object
`totalClaims`	number
`returned`	number
`returnedSummary`	object
`claims`	array
`source`	object
`note`	string

Example response datajson

{
  "query": {
    "state": "example",
    "county": "example",
    "zip": "example",
    "yearFrom": 1,
    "yearTo": 1,
    "limit": 1
  },
  "totalClaims": 1,
  "returned": 1,
  "returnedSummary": {
    "totalPaid": 1,
    "averagePaid": 1
  },
  "claims": [
    {
      "dateOfLoss": "example",
      "yearOfLoss": 1,
      "countyCode": "example",
      "censusTract": "example",
      "zipCode": "example",
      "state": "example",
      "ratedFloodZone": "example",
      "causeOfDamage": "example",
      "waterDepth": 1,
      "occupancyType": 1,
      "netBuildingPaymentUSD": 1,
      "netContentsPaymentUSD": 1,
      "totalAmountPaid": 1,
      "totalBuildingInsuranceCoverage": 1,
      "latitude": 1,
      "longitude": 1
    }
  ],
  "source": {
    "provider": "example",
    "url": "example",
    "license": "example"
  },
  "note": "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.