vehicle.investigations

Chronological feed of NHTSA ODI (Office of Defects Investigation) investigations, newest first. Returns preliminary evaluations (PE), engineering analyses (EA), defect petitions (DP), and recall queries (RQ) — each with NHTSA ID, type code, open/close dates, status, subject, and full description (HTML stripped + raw). Useful for tracking what NHTSA is currently investigating (Tesla FSD, autonomous-vehicle crashes, Rivian suspension, etc.). NOTE: NHTSA's endpoint does NOT support make/model/year filtering — use vehicle.recalls or vehicle.complaints for vehicle-scoped lookups. Public-domain US government records.

price

$0.0024 USDC per call

method

GET/api/vehicle/investigations

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
`limit`	integer	Max records to return (1-100). Default 25. min 1 · max 100
`offset`	integer	Offset into the chronological feed for pagination. Default 0. min 0 · max 10000
`status`	string	Filter by status: "O" (open), "C" (closed). Omit for all. one of: O \| C

Code samples

cURLbash

# 1. Probe with no auth → 402 envelope with PaymentRequirements
curl -sS 'https://2s.io/api/vehicle/investigations?limit=25&offset=0&status=O'

# 2. Sign + retry with PAYMENT-SIGNATURE:
curl -sS 'https://2s.io/api/vehicle/investigations?limit=25&offset=0&status=O' \
  -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/investigations?limit=25&offset=0&status=O'

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.investigations({
  "limit": 25,
  "offset": 0,
  "status": "O"
})

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.investigations(limit=25, offset=0, status="O")

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.investigations",
    "arguments": {
      "limit": 25,
      "offset": 0,
      "status": "O"
    }
  }
}

Response

Field	Type	Description
`query`	object
`totalCount`	integer
`returned`	integer
`pagination`	object
`investigations`	array
`source`	object

Example response datajson

{
  "query": {
    "limit": 1,
    "offset": 1,
    "status": "example"
  },
  "totalCount": 1,
  "returned": 1,
  "pagination": {
    "nextOffset": 1,
    "previousOffset": 1
  },
  "investigations": [
    {
      "id": 1,
      "nhtsaId": "example",
      "investigationNumber": "example",
      "investigationType": "example",
      "issueYear": "example",
      "openDate": "example",
      "latestActivityDate": "example",
      "status": "example",
      "subject": "example",
      "description": "example",
      "descriptionHtml": "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.