# Saylor Innovations Amateur Radio Callsign Lookup

> Saylor Innovations Amateur Radio Callsign Lookup is a paid API for AI agents from saylorinnovations.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-17).

Looks up a US amateur radio callsign in the FCC database and returns licence class, status, grant/expiry dates, licensee name, and grid square

## Facts

- Endpoint: GET https://saylorinnovations.com/api/radio/callsign/:call?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-17
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/saylor-innovations-amateur-radio-callsign-lookup-0de732b5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_HwEN0OEqokCQedXEJ_FAf

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 saylor-innovations-amateur-radio-callsign-lookup-0de732b5
```

Example prompt: Can you look up the amateur radio callsign W6ABC for me and tell me the licence class, whether it's active, the licensee's name, expiry date, and grid square from the FCC database?

## When to prefer this

Use this endpoint when you need authoritative FCC data on a specific US amateur radio callsign, including licence class, validity, holder identity, and location grid square. Prefer this over general web searches when you need structured, machine-readable licence data for verification, logging, or enrichment purposes.

## Known failure modes

- Callsign not found in FCC database — returns error or empty result
- Invalid callsign format supplied — may return an error
- FCC database temporarily unavailable — upstream timeout or error
- Callsign belongs to a cancelled or revoked licence — returns status accordingly

## How this service works

US amateur radio callsign lookup - licence class, status, grant and expiry dates, licensee name and grid square from the FCC database

## Output

Returns the FCC licence class (e.g. Technician, General, Extra), current licence status (active/expired), grant date, expiry date, licensee name, and Maidenhead grid square for the queried callsign.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/saylor-innovations-amateur-radio-callsign-lookup-0de732b5/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from saylorinnovations.com](https://www.zero.xyz/host/saylorinnovations.com/llms.txt)