geo.location-dossier

Static risk & context dossier for a US location. Pass lat+lon or a US address (geocoded for you). Composes five authoritative, keyless federal sources into one answer an agent cannot derive from training: Census place context (county, state, census tract, congressional district), FEMA flood zone + Special-Flood-Hazard-Area status, USGS ASCE 7-16 seismic design parameters (Ss, S1, SDS, SD1, seismic design category, PGA), the nearest NOAA/GHCN climate station, and — when a zip is supplied — US Census ACS 5-year demographics. Each layer is isolated: one source failing does not fail the rest. This is the slow-moving structural-risk picture (siting, insurance, due diligence), distinct from real-time weather/earthquake conditions.

price

$0.0072 USDC per call

method

GET/api/geo/location-dossier

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
`lat`	number	min -90 · max 90
`lon`	number	min -180 · max 180
`address`	string	min 3 chars · max 200 chars
`zip`	string	match ^\d{5}$
`riskCategory`	string	ASCE risk category (default II). one of: I \| II \| III \| IV
`siteClass`	string	ASCE soil site class (default D). one of: A \| B \| C \| D \| E

Code samples

cURLbash

# 1. Probe with no auth → 402 envelope with PaymentRequirements
curl -sS 'https://2s.io/api/geo/location-dossier?lat=-90&lon=-180&address=xxx&zip=12345&riskCategory=I&siteClass=A'

# 2. Sign + retry with PAYMENT-SIGNATURE:
curl -sS 'https://2s.io/api/geo/location-dossier?lat=-90&lon=-180&address=xxx&zip=12345&riskCategory=I&siteClass=A' \
  -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/geo/location-dossier?lat=-90&lon=-180&address=xxx&zip=12345&riskCategory=I&siteClass=A'

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.geo.locationDossier({
  "lat": -90,
  "lon": -180,
  "address": "xxx",
  "zip": "12345",
  "riskCategory": "I",
  "siteClass": "A"
})

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.geo.location_dossier(lat=-90, lon=-180, address="xxx", zip="12345", riskCategory="I", siteClass="A")

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": "geo.location-dossier",
    "arguments": {
      "lat": -90,
      "lon": -180,
      "address": "xxx",
      "zip": "12345",
      "riskCategory": "I",
      "siteClass": "A"
    }
  }
}

Response

Field	Type	Description
`query`	object
`summary`	object
`place`	object
`flood`	object
`seismic`	object
`climate`	object
`demographics`	object
`sources`	array
`note`	string

Example response datajson

{
  "query": {
    "lat": 1,
    "lon": 1,
    "zip": "example",
    "address": "example"
  },
  "summary": {
    "county": "example",
    "state": "example",
    "floodRisk": "example",
    "isSFHA": false,
    "seismicDesignCategory": "example",
    "nearestStationKm": 1
  },
  "place": {
    "found": false,
    "error": "example"
  },
  "flood": {
    "found": false,
    "error": "example"
  },
  "seismic": {
    "found": false,
    "error": "example"
  },
  "climate": {
    "found": false,
    "error": "example"
  },
  "demographics": {
    "found": false,
    "error": "example"
  },
  "sources": [
    {
      "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.