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POST
Check if numbers can transfer

Authorizations

Authorization
string
header
required

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

Kallabot-Version
enum<string>

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
numbers
string[]
required

Numbers in E.164 form.

Required array length: 1 - 50 elements

Response

Successful Response

One answer per number asked about (a check, not a list: no paging).

results
PortabilityResult · object[]
required

Each number's result, in the order asked.