Send a campaign's text message to a number you choose. The campaign's SMS channel must be enabled and have a template; otherwise 400. The test isn't added to the campaign's recipient count, but it uses the plan's SMS allowance (402 when used up).

Prerequisites: a bearer token, and a campaign in your account whose SMS channel is enabled and has a template, on a location with an active plan.

Authentication: Account token. The campaign must belong to your own account; otherwise 403.

Rate limit: 60 requests per minute, counted per user (the token’s user).