---
title: "Search the NTSB civil aviation accident & incident database..."
method: GET
path: "/api/aviation/accidents"
tags: ["aviation"]
---

# Search the NTSB civil aviation accident & incident database...

`GET /api/aviation/accidents`

## Request

- Base URL: `https://2s.io`
- URL: `https://2s.io/api/aviation/accidents`
- Auth: API key in header `PAYMENT-SIGNATURE`

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.

## Query parameters

- `registration` string
- `state` string
- `make` string
- `model` string
- `city` string
- `dateFrom` string
- `dateTo` string
- `limit` integer
- `trial` 1

## Other responses

- `200` (unresolved $ref)
- `400`: Invalid request — not charged. error.code: BAD_REQUEST or INVALID_PARAM (parameter validation; error.details.issues lists each problem), MALFORMED_JSON, or a request-specific code. Other client errors: 405 METHOD_NOT_ALLOWED (wrong verb; see the Allow header), 413 PAYLOAD_TOO_LARGE.
- `402`: Payment required. Body is the x402 PaymentRequirements envelope with a multi-network accepts array; the per-call price is in accepts[].amount (and on the operation as x-2s-price). Sign for whichever rail you hold USDC on (EIP-3009 for Base, partial SPL transfer for Solana) and retry with the PAYMENT-SIGNATURE header (X-PAYMENT also accepted for v1 clients). Also PAYMENT_SETTLE_FAILED (error envelope) when a verified payment failed to settle: error.details.chargeStatus is "not_charged" (retry with a fresh payment) or "unknown" (the authorization may still settle before its deadline — check it before retrying).
- `429`: Too many requests — RATE_LIMITED: our per-IP / per-payer limiter. Not charged; retry after Retry-After.
- `5XX`: Server-side failure. 500 INTERNAL: unexpected error; quote error.errorId (also the X-2s-Error-Id header). 502 UPSTREAM_UNAVAILABLE (or another UPSTREAM_* code): the data provider failed — composite endpoints refuse unbilled when every source fails. 503 SERVICE_PAUSED: endpoint paused by the operator kill switch, retry after Retry-After; 503 SPEND_CAP: daily upstream budget exhausted. 504 UPSTREAM_TIMEOUT. Not charged.

---

[API](https://skmtc.dev/2s-io/apis/2s-the-most-everything-api.md) · [All operations](https://skmtc.dev/2s-io/apis/2s-the-most-everything-api/llms.txt) · [OpenAPI document](https://skmtc.dev/2s-io/apis/2s-the-most-everything-api/revisions/da4c5caf686e?raw)