# FAA Aircraft Title & Airworthiness Due-Diligence Check

> FAA Aircraft Title & Airworthiness Due-Diligence Check is a paid API for AI agents from api.agentstools.dev, paid per call via x402, $0.04/call, status unknown (last checked 2026-09-15).

Returns a 0-100 title risk score, low/medium/high/critical rating, clear-to-transact flag, and per-dimension signals for a US-registered aircraft using FAA registry data.

## Facts

- Endpoint: GET https://api.agentstools.dev/aircraft/diligence
- Price: $0.04/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/faa-aircraft-title-airworthiness-due-diligence-check-10a0ea44
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Et2d5qU5nnw5d-ccShhjl

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability faa-aircraft-title-airworthiness-due-diligence-check-10a0ea44
```

Example prompt: Run a title and airworthiness due-diligence check on tail number N801NN and tell me the risk score, whether it's clear to transact, and what issues were flagged.

## When to prefer this

Choose this endpoint when an agent needs a fast, deterministic, structured risk signal for a US-registered aircraft before a purchase or transaction — specifically when you need a scored, flagged verdict with cited FAA fields rather than raw registry data. Not a substitute for a certified title search, but ideal for automated pre-screening in aviation transaction workflows.

## Known failure modes

- Tail number not found in FAA registry — returns 404 or empty result
- Invalid N-number format — returns 400 bad request
- Aircraft deregistered or historical — may return limited data
- Neither tail nor serial provided — missing required parameter error
- FAA registry data temporarily unavailable — upstream timeout or 503

## How this service works

Title and airworthiness due-diligence verdict for a US-registered aircraft from the public FAA Aircraft Registry. Give a tail number or serial and get a 0-100 title risk score, a low, medium, high or critical rating, a clear_to_transact flag, per-dimension signals, reasons and the cited registry fields. Deterministic, no LLM. A diligence signal, not a certified title search.

## Output

A JSON object containing a 0-100 title risk score, a categorical rating (low, medium, high, or critical), a boolean clear_to_transact flag, per-dimension signals breaking down specific risk areas, human-readable reason strings explaining the rating, and the underlying FAA registry fields that were cited — all computed deterministically from public FAA Aircraft Registry data.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [],
     "properties": {
      "tail": {
       "type": "string",
       "description": "US tail number / N-number, for example N801NN"
      },
      "serial": {
       "type": "string",
       "description": "Aircraft serial number (used if no tail is given)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/faa-aircraft-title-airworthiness-due-diligence-check-10a0ea44/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.agentstools.dev](https://www.zero.xyz/host/api.agentstools.dev/llms.txt)