Look up a call sign
curl https://opencallbook.com/api/v1/licenses/W1AWSearch
curl 'https://opencallbook.com/api/v1/search?q=smith&state=MN&class=E,G&sort=recent'Cross-service by FRN
curl https://opencallbook.com/api/v1/frn/0002274249Stats
curl https://opencallbook.com/api/v1/statsCompare states
curl 'https://opencallbook.com/api/v1/compare?states=MN,WI&service=AM'Rate limits
- Anonymous: 60 requests / minute / IP.
- API key tier (coming with phase 4): higher per-minute limits.