aviation.accidents

Search the NTSB civil aviation accident & incident database (CAROL) — US events from 1962 to present plus selected foreign investigations. Filter by aircraft registration (N-number, partial match), US state (2-letter code or name), make, model, city, and/or event date range (dateFrom/dateTo as YYYY-MM-DD). At least one filter is required. Returns matching events newest-first: NTSB number, event date/type, city/state/country, aircraft registration(s)/make(s)/model(s), highest injury level, onboard & on-ground injury counts, report type/status, and a link to the official NTSB case page. Data: NTSB (U.S. public domain), live. For aviation safety research, fleet/tail-number history, incident due-diligence, and accident-trend analysis.

price

$0.0012 USDC per call

method

GET/api/aviation/accidents

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
`registration`	string	Aircraft registration / N-number (partial match). min 1 chars · max 20 chars
`state`	string	US state, 2-letter code or full name. min 2 chars · max 40 chars
`make`	string	Aircraft make (partial match), e.g. Cessna. min 1 chars · max 60 chars
`model`	string	Aircraft model (partial match), e.g. 172. min 1 chars · max 60 chars
`city`	string	Event city (partial match). min 1 chars · max 80 chars
`dateFrom`	string	Earliest event date, YYYY-MM-DD. match ^\d{4}-\d{2}-\d{2}$
`dateTo`	string	Latest event date, YYYY-MM-DD. match ^\d{4}-\d{2}-\d{2}$
`limit`	integer	Max records to return (1-100, default 25). min 1 · max 100

Code samples

cURLbash

# 1. Probe with no auth → 402 envelope with PaymentRequirements
curl -sS 'https://2s.io/api/aviation/accidents?registration=example&state=xx&make=example&model=example&city=example&dateFrom=2024-01-01&dateTo=2024-01-01&limit=25'

# 2. Sign + retry with PAYMENT-SIGNATURE:
curl -sS 'https://2s.io/api/aviation/accidents?registration=example&state=xx&make=example&model=example&city=example&dateFrom=2024-01-01&dateTo=2024-01-01&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/aviation/accidents?registration=example&state=xx&make=example&model=example&city=example&dateFrom=2024-01-01&dateTo=2024-01-01&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.aviation.accidents({
  "registration": "example",
  "state": "xx",
  "make": "example",
  "model": "example",
  "city": "example",
  "dateFrom": "2024-01-01",
  "dateTo": "2024-01-01",
  "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.aviation.accidents(registration="example", state="xx", make="example", model="example", city="example", dateFrom="2024-01-01", dateTo="2024-01-01", 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": "aviation.accidents",
    "arguments": {
      "registration": "example",
      "state": "xx",
      "make": "example",
      "model": "example",
      "city": "example",
      "dateFrom": "2024-01-01",
      "dateTo": "2024-01-01",
      "limit": 25
    }
  }
}

Response

Field	Type	Description
`query`	object
`total`	number
`truncated`	boolean
`count`	number
`items`	array
`source`	object

Example response datajson

{
  "query": {},
  "total": 1,
  "truncated": false,
  "count": 1,
  "items": [
    {
      "ntsbNumber": "example",
      "mkey": "example",
      "eventType": "example",
      "eventDate": "example",
      "city": "example",
      "state": "example",
      "country": "example",
      "registration": [
        "example"
      ],
      "make": [
        "example"
      ],
      "model": [
        "example"
      ],
      "highestInjuryLevel": "example",
      "injuriesOnboard": 1,
      "injuriesOnGround": 1,
      "reportType": "example",
      "reportStatus": "example",
      "reportUrl": "example"
    }
  ],
  "source": {
    "provider": "example",
    "url": "example",
    "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.