# FAA Aircraft Registration Lookup

> FAA Aircraft Registration Lookup is a paid API for AI agents from payai.agentstools.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Look up a US-registered aircraft by tail number (N-number) or serial number in the FAA Aircraft Registry and return a normalized registration record.

## Facts

- Endpoint: GET https://payai.agentstools.dev/aircraft/registration
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/faa-aircraft-registration-lookup-727adbbc
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_9ORJqa04Csxa6l1kTf2ms

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-registration-lookup-727adbbc
```

Example prompt: Can you look up the FAA registration record for the aircraft with tail number N801NN and tell me who owns it, what model it is, and whether it's currently registered?

## When to prefer this

Use this endpoint when you need a quick, cheap ($0.01) lookup of US-registered aircraft data directly from FAA public registry data. Ideal as a first step in aircraft due diligence workflows before more expensive checks. Best for US N-number aircraft; does not cover foreign-registered aircraft.

## Known failure modes

- Tail number not found in FAA registry — aircraft may be foreign-registered or unregistered
- Invalid N-number format returns an error
- Aircraft deregistered or cancelled — record may be historical only
- Serial number lookup returns multiple matches or no match if ambiguous
- FAA registry data may lag real-world changes by days or weeks

## How this service works

Look up a US-registered aircraft in the public FAA Aircraft Registry by tail number (N-number) or serial and get a normalized record: registration status, registered owner, make, model, year, serial, engine, airworthiness date, type certificate and Mode-S code. Cheap first step before aircraft/diligence.

## Output

A normalized FAA registration record including: registration status (active, expired, etc.), registered owner name, aircraft make and model, manufacture year, serial number, engine type, airworthiness date, type certificate data, and Mode-S transponder code.

## 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-registration-lookup-727adbbc/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from payai.agentstools.dev](https://www.zero.xyz/host/payai.agentstools.dev/llms.txt)