Use Postman with the Telnyx API

This legacy route is retained for existing links. Postman is not required to use the Telnyx API. For the shortest supported onboarding path, start with Make your first API request.

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Before you start

Create an API key in the Mission Control Portal and review the authentication guidance. Do not paste the key into a shared request, collection, or workspace.

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Configure a local environment

1. In Postman, create or select a local environment.
2. Add a variable named TELNYX_API_KEY.
3. Set the variable type to Secret and enter your API key as its current value.
4. Save the environment and select it for the request.

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Send a read-only request

1. Create a GET request to https://api.telnyx.com/v2/balance.
2. Open the Authorization tab and select Bearer Token.
3. Enter {{TELNYX_API_KEY}} as the token.
4. Add an Accept: application/json header.
5. Select Send.

A successful request returns your account balance. If it fails, compare the method, URL, and authorization header with Make your first API request, then use the troubleshooting guide.