Make sure you've configured your account, such as purchasing a number, creating a messaging profile, and associating that messaging profile with that number.
More details here: https://developers.telnyx.com/docs/v2/messaging/quickstarts/portal-setup and for specific error codes here:
https://developers.telnyx.com/docs/errors/#below-is-a-list-of-all-api-error-codes-related-to-the-telnyx-platform
POSTMAN is a RESTful HTTP client and can be downloaded from here: https://www.postman.com/downloads/
Sending SMS Via API v1
At this stage, you are ready to send SMS.
Open up, Postman. "POST" to "https://sms.telnyx.com/messages"
In "Headers", set your "x-profile-secret" to the secret under your Messaging Profile.
In the "Body", you can paste in the following:
{
"from": "+1[your messaging-enabled number]",
"to": "+1[intended recipient]",
"body": "Hello World"
}
Video demo showing sending SMS via Postman using API v1
Yay! You have sent your first SMS using API V1.
Sending SMS Via API V2
Open up, Postman. "POST" to "https://api.telnyx.com/v2/messages"
Now you need to generate API V2 secret Key
For using API V2 to send out SMS, you need to generate V2 key here in the API Keys Section
Click on create API key on top
This will be the new API v2 key that will be used while sending SMS
In the Postman "Headers", set your "Authorization" to the API v2 secret key and the Key should be preceded with "Bearer".
In the "Body", you can paste in the following:
{
"from": "+1[your messaging-enabled number]",
"to": "+1[intended recipient]",
"text": "Hello World"
}
Video demo showing sending SMS via Postman using API V2
Kudos! now you know how to send SMS using API V2