Telnyx Integration

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Overview

Telnyx is a cloud communications platform that provides programmable voice via its Call Control API. Bananaflow AI’s Telnyx integration uses Call Control plus WebSocket media streaming to power your voice agents.

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Prerequisites

Before setting up Telnyx integration, you’ll need:

• A Telnyx account
• An API Key from the Telnyx Mission Control Portal
• A Call Control Application (optional – leave the field blank in Bananaflow and we’ll auto-create one for you on save, with the inbound webhook URL pre-set)
• At least one Telnyx phone number assigned to that Call Control Application

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Configuration

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Step 1: Get Telnyx Credentials

1. Log in to the Telnyx Mission Control Portal
2. Navigate to API Keys and create (or copy) an API Key
3. (Optional) Navigate to Call Control → Applications and create (or open) the application you’ll use with Bananaflow, then copy its Connection ID (Call Control App ID). Skip this if you want Bananaflow to auto-create the Call Control Application for you on save.
4. Navigate to Numbers → My Numbers and assign your phone numbers to the Call Control Application you’ll use with Bananaflow (if you’re letting Bananaflow auto-create the application, do this after saving the configuration in Step 2)

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Step 2: Configure in Bananaflow AI

1. Navigate to /telephony-configurations and click Add configuration
2. Select Telnyx as your provider
3. Enter your credentials:
   • API Key
   • Call Control App ID (Connection ID) – optional. Leave blank and Bananaflow will auto-create a Call Control Application on save (with the inbound webhook URL already configured) and store its Connection ID on this configuration.
4. Click Save Configuration
5. Open the configuration you just created and add at least one phone number (with country code, in E.164 format – + then country code then number, no spaces or dashes, e.g. +1234567890). The default caller ID is used for outbound calls.
   If Bananaflow auto-created the Call Control Application for you, you still need to assign your Telnyx numbers to that application in the Telnyx Portal under Numbers → My Numbers. The auto-created application is named bananaflow-<random> – its Connection ID is shown on the saved configuration.

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Step 3: Test Your Configuration

1. Create a test workflow
2. Click “Call” to verify connection
3. Check call logs for successful connection

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Inbound Calling Setup

Telnyx delivers inbound webhooks at the Call Control Application level – the webhook URL is configured once on the application, and applies to every number assigned to it. When you save an inbound workflow on a phone number, Bananaflow automatically pushes the webhook URL to your Call Control Application’s webhook_event_url (provided the credentials are correct). If Bananaflow auto-created the application during configuration save, the webhook URL is already set and this step is a no-op.

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Step 1: Assign an Inbound Workflow to the Phone Number

1. Go to /telephony-configurations and open your Telnyx configuration
2. In the Phone numbers section, edit the number that should receive inbound calls
3. Set its Inbound workflow to the agent that should answer
4. Save

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Step 2: Verify the Webhook URL on the Call Control Application

1. Go to Call Control → Applications in the Telnyx Portal
2. Open the application whose Connection ID you configured in Bananaflow
3. In Webhook Settings, confirm:
   • Webhook URL is set to: https://app.bananaflow.ai/api/v1/telephony/inbound/run
   • HTTP Method is POST
4. Make sure the phone numbers you want to use for inbound are assigned to this application
   Bananaflow pushed this URL automatically when you saved the inbound workflow in Step 1. The same URL is shared across every number on the Call Control Application – Bananaflow matches the inbound call to the right agent using the called number’s inbound workflow assignment. If the field is empty, shows a different URL, or Bananaflow surfaced a sync warning on save, the auto-push failed – most often because the API Key or Connection ID in Bananaflow is incorrect. Paste the URL into the field yourself, set the method to POST, and save.

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Test Inbound Calling

1. Call your configured Telnyx phone number from another phone
2. Verify your Bananaflow AI voice agent answers and responds
3. Check call logs in both Bananaflow AI dashboard and Telnyx Portal

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Troubleshooting

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Best Practices

• Test your configuration with a single call before running campaigns
• Monitor the Telnyx Portal for usage and billing
• Use a dedicated Call Control Application for Bananaflow so the shared webhook URL doesn’t conflict with other systems