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## Project API token format changed to a `swapi_` prefix

New Project API tokens begin with `swapi_` and are 42 characters long, replacing the previous
`PT` prefix and 50-character length. Personal Access Tokens and Project Signing Keys keep
their existing format.

Every token created before this change keeps working, with no deprecation and no end date, so
there is nothing to migrate. A Project can hold tokens in both formats at once, and both
authenticate identically through [HTTP Basic auth](/docs/apis/authorization). Treat a token as
an opaque string rather than matching it against a pattern or assuming a fixed length.

Find and create tokens under [API credentials](/docs/platform/your-signalwire-api-space) in the
Dashboard, or with [Create API token](/docs/apis/rest/project-tokens/create-token).

## Phone number address management added to the REST API

Link, re-point, or remove the resource that handles a phone number's calls or messages
without opening the Dashboard. Every number you own has one address per channel, so
[List phone number addresses](/docs/apis/rest/phone-number-addresses/list-phone-number-addresses)
shows each number's `calling` and `messaging` addresses and the resource assigned to each.
[Link a resource to a phone number](/docs/apis/rest/phone-number-addresses/create-phone-number-address)
assigns a resource to an unassigned channel,
[Update the resource for a phone number](/docs/apis/rest/phone-number-addresses/update-phone-number-address)
re-points or renames it, and
[Remove the resource from a phone number](/docs/apis/rest/phone-number-addresses/delete-phone-number-address)
unassigns it while keeping the number.

The API is in beta and may change. It assigns handlers only and never purchases or releases a number.