vehicle.vin-decode

Decode a 17-character VIN to manufacturer-supplied vehicle metadata via NHTSA's vPIC database. Returns identity (year, make, model, trim, series, body class, manufacturer), assembly plant (city, state, country), engine (cylinders, displacement, HP, fuel type, configuration, engine model), transmission (style, speeds), and body/weight specs. Curated to the ~30 fields agents actually use from vPIC's ~140-field response. Backed by NHTSA.gov; data is public-domain US government records.

price

$0.0024 USDC per call

method

GET/api/vehicle/vin-decode

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
`vin`required	string	17-character VIN. Case-insensitive. Excludes letters I, O, and Q per VIN standard. min 17 chars · max 17 chars · match ^[A-HJ-NPR-Z0-9]{17}$
`modelYear`	integer	Optional model-year hint — disambiguates VINs where the year-digit wraps (A=1980/2010, etc.). min 1949 · max 2099

Code samples

cURLbash

# 1. Probe with no auth → 402 envelope with PaymentRequirements
curl -sS 'https://2s.io/api/vehicle/vin-decode?vin=xxxxxxxxxxxxxxxxx&modelYear=1949'

# 2. Sign + retry with PAYMENT-SIGNATURE:
curl -sS 'https://2s.io/api/vehicle/vin-decode?vin=xxxxxxxxxxxxxxxxx&modelYear=1949' \
  -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/vehicle/vin-decode?vin=xxxxxxxxxxxxxxxxx&modelYear=1949'

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.vehicle.vinDecode({
  "vin": "xxxxxxxxxxxxxxxxx",
  "modelYear": 1949
})

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.vehicle.vin_decode(vin="xxxxxxxxxxxxxxxxx", modelYear=1949)

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": "vehicle.vin-decode",
    "arguments": {
      "vin": "xxxxxxxxxxxxxxxxx",
      "modelYear": 1949
    }
  }
}

Response

Field	Type	Description
`vin`	string
`modelYear`	string
`make`	string
`model`	string
`trim`	string
`series`	string
`bodyClass`	string
`manufacturer`	string
`plant`	object
`engine`	object
`transmission`	object
`doors`	string
`driveType`	string
`vehicleType`	string
`gvwrClass`	string
`source`	object

Example response datajson

{
  "vin": "example",
  "modelYear": "example",
  "make": "example",
  "model": "example",
  "trim": "example",
  "series": "example",
  "bodyClass": "example",
  "manufacturer": "example",
  "plant": {
    "city": "example",
    "state": "example",
    "country": "example"
  },
  "engine": {
    "cylinders": "example",
    "displacementL": "example",
    "hp": "example",
    "fuelTypePrimary": "example",
    "configuration": "example",
    "model": "example"
  },
  "transmission": {
    "style": "example",
    "speeds": "example"
  },
  "doors": "example",
  "driveType": "example",
  "vehicleType": "example",
  "gvwrClass": "example",
  "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.