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Documentation Index

Fetch the complete documentation index at: https://documentation.uponai.com/llms.txt

Use this file to discover all available pages before exploring further.

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Problem: Cannot Hear Audio After Entering Your WebSocket URL

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Step 1: Test connection with Postman

1

Open Postman

Create a new WebSocket request.
2

Connect

Enter your WebSocket URL and click Connect.
3

Send a test message

Navigate to the Message tab, enter “Hello”, and click Send. You should receive the message back in your server.

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Step 2: Verify endpoint protocol

Endpoint typeURL prefix
HTTPSwss://
HTTPws://

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Step 3: Check for trailing slash

Some server setups don’t allow a trailing slash in the URL.
  • ✅ Correct: https://example.com/websocket
  • ❌ Incorrect: https://example.com/websocket/

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Step 4: Check for server response

  • Add logging in your WebSocket code to verify the connection is established
  • Add logging in your message handler to confirm messages are received from UponAI

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Problem: Call Always Disconnects After a Few Seconds

  • Add logging to check if you’re sending end_call: true unintentionally anywhere in your code
  • Verify your server setup supports persistent WebSocket connections — Vercel edge functions and serverless functions cannot act as WebSocket servers

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Problem: Call Disconnects After 5–10 Minutes

Check your server vendor for automatic timeout settings. For example, Replit non-reserved instances time out at 5 minutes.