energy.fuel-stations

Locate alternative-fuel stations across the US via NREL Alternative Fuels Data Center. Search by lat/lon + radius (miles), state, or zip. Filter by fuelType (BD=Biodiesel | CNG=Compressed Natural Gas | ELEC=Electric vehicle charging | E85=Ethanol | HY=Hydrogen | LNG=Liquefied Natural Gas | LPG=Propane | RD=Renewable Diesel), status (E=Available | P=Planned | T=Temporarily Unavailable), access (public/private), and EV network. For EV chargers, returns connector types (J1772, CHAdeMO, Tesla, etc.), Level 1/2/DC-fast counts, pricing, and access hours. Indispensable for trip-planning agents, fleet logistics, EV-adoption analysis.

price

$0.0012 USDC per call

method

GET/api/energy/fuel-stations

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
`radius`	number	min 0.1 · max 500
`fuelType`	string	match ^[A-Z0-9,]+$
`state`	string	min 2 chars · max 2 chars · match ^[A-Za-z]{2}$
`zip`	string	match ^\d{5}$
`status`	string	one of: all \| E \| P \| T
`accessCode`	string	one of: all \| public \| private
`network`	string	min 1 chars · max 80 chars
`limit`	integer	min 1 · max 200

Code samples

cURLbash

# 1. Probe with no auth → 402 envelope with PaymentRequirements
curl -sS 'https://2s.io/api/energy/fuel-stations?lat=-90&lon=-180&radius=0.1&fuelType=example&state=xx&zip=12345&status=all&accessCode=all&network=example&limit=25'

# 2. Sign + retry with PAYMENT-SIGNATURE:
curl -sS 'https://2s.io/api/energy/fuel-stations?lat=-90&lon=-180&radius=0.1&fuelType=example&state=xx&zip=12345&status=all&accessCode=all&network=example&limit=25' \
  -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/energy/fuel-stations?lat=-90&lon=-180&radius=0.1&fuelType=example&state=xx&zip=12345&status=all&accessCode=all&network=example&limit=25'

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.energy.fuelStations({
  "lat": -90,
  "lon": -180,
  "radius": 0.1,
  "fuelType": "example",
  "state": "xx",
  "zip": "12345",
  "status": "all",
  "accessCode": "all",
  "network": "example",
  "limit": 25
})

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.energy.fuel_stations(lat=-90, lon=-180, radius=0.1, fuelType="example", state="xx", zip="12345", status="all", accessCode="all", network="example", limit=25)

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": "energy.fuel-stations",
    "arguments": {
      "lat": -90,
      "lon": -180,
      "radius": 0.1,
      "fuelType": "example",
      "state": "xx",
      "zip": "12345",
      "status": "all",
      "accessCode": "all",
      "network": "example",
      "limit": 25
    }
  }
}

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.