Numbers
Check number availability
Checks whether up to 10 numbers from a search are still for sale. Check just before buying, because numbers sell out.
Scopes: number:read
POST
Check number availability
Authorizations
An API key from Settings → API keys, sent as Authorization: Bearer kb_live_…. A workspace key starts kb_; a personal key starts kbp_ and acts as its owner.
Headers
The API version to answer as, a date (YYYY-MM-DD). Leave it out for the current version (2026-11-07). An unknown version is refused with 400 unsupported_api_version.
Available options:
2026-11-07 Example:
"2026-11-07"
Body
application/json
Up to 10 numbers to check.
Required array length:
1 - 10 elementsResponse
Successful Response
Each number asked about → whether it is still on sale.