# How to Integrate Lovable with Plivo

- Tool: Lovable
- Difficulty: Intermediate
- Time required: 35 minutes
- Last updated: March 2026

## TL;DR

To integrate Lovable with Plivo, create a Supabase Edge Function that proxies Plivo API calls using your Auth ID and Auth Token with HTTP Basic Auth. Store credentials in Cloud → Secrets, then build Edge Functions to send SMS messages and initiate voice calls. Plivo is a cost-effective Twilio alternative with a simple REST API, competitive international pricing, and a developer-friendly approach to voice and SMS.

## Affordable voice and SMS in Lovable using Plivo's developer-friendly API

Plivo positions itself as the cost-effective alternative to Twilio, offering similar voice and SMS capabilities at pricing that is often 30-50% lower for international messaging and competitive with Twilio for US messaging. The API design mirrors Twilio's simplicity: Basic Auth with Auth ID as username and Auth Token as password, RESTful endpoints for sending messages and making calls, and XML-based voice call control (Plivo XML, analogous to TwiML). This familiarity makes Plivo an easy migration path for developers who know Twilio.

The Plivo Messaging API v1 is the primary endpoint for SMS and MMS. A send message request requires just src (your Plivo number), dst (destination number), and text. The response returns a message UUID and a list of individual message objects (one per recipient if you send to multiple numbers). Plivo also provides delivery webhooks, inbound message forwarding, and message status callbacks — all relevant for building responsive communication features in Lovable.

For voice calls, Plivo uses Answer URL callbacks: when a call connects, Plivo fetches a URL and expects an XML response that controls the call flow (play audio, record, transfer, gather DTMF input). Your Edge Function must return the appropriate Plivo XML for the desired behavior. For simple outbound calls that play a message, the XML is minimal. For interactive IVR flows, the XML can be more complex but remains straightforward compared to other CPaaS providers.

## Before you start

- A Lovable project with Lovable Cloud enabled (Cloud tab visible in the editor)
- A Plivo account at plivo.com with a verified phone number purchased
- Your Plivo Auth ID and Auth Token from the Plivo console at console.plivo.com
- The Plivo phone number (src number) you will send messages from, in E.164 format
- For voice calls: a publicly accessible Answer URL (your deployed Edge Function URL)

## Step-by-step guide

### 1. Locate your Plivo credentials in the console

Sign in to console.plivo.com. On the main dashboard (Overview page), your Auth ID and Auth Token are displayed prominently in the 'API credentials' section. The Auth ID looks like a string like MAXXXXXXXXXXXXXXXXXX (starts with MA). The Auth Token is a longer alphanumeric string. Click the 'Copy' icons next to each to copy them.

You also need your Plivo phone number — go to 'Phone Numbers' → 'Your Numbers' in the left sidebar and copy the number in E.164 format (+1XXXXXXXXXX for US numbers). This is the src number for outbound messages and calls.

For the Messaging API, verify that your number is SMS-capable (shows SMS in the capabilities column on the Your Numbers page). For voice calls, the number must be Voice-capable. If you do not have a number yet, go to 'Phone Numbers' → 'Buy Number' and purchase one with the capabilities you need. Numbers typically cost $0.80-$1.00 per month for US numbers.

**Expected result:** Auth ID, Auth Token, and Plivo phone number copied from the Plivo console, ready to store in Lovable Secrets.

### 2. Store Plivo credentials in Cloud → Secrets

Open the Cloud tab in your Lovable editor by clicking the '+' panel selector at the top right. Scroll to the Secrets section and add three secrets by clicking the '+' button for each.

Create PLIVO_AUTH_ID and paste your Auth ID (the MA-prefixed string). Create PLIVO_AUTH_TOKEN and paste your Auth Token. Create PLIVO_PHONE_NUMBER and paste your Plivo number in E.164 format (e.g. +12025551234).

These secret names must match exactly what your Edge Function uses in Deno.env.get() calls. Plivo uses HTTP Basic Auth where Auth ID is the username and Auth Token is the password — both are required. Lovable's security infrastructure, which is SOC 2 Type II certified, encrypts all secrets at rest and actively prevents hardcoded credentials from appearing in generated code. Never paste your Auth Token into a Lovable chat prompt or code field.

**Expected result:** Three secrets (PLIVO_AUTH_ID, PLIVO_AUTH_TOKEN, PLIVO_PHONE_NUMBER) saved in Cloud → Secrets.

### 3. Build the Plivo SMS Edge Function

The Plivo SMS Edge Function is one of the simplest CPaaS integrations because the API is clean and well-documented. The endpoint for sending messages is POST https://api.plivo.com/v1/Account/{authId}/Message/ using HTTP Basic Auth with authId as username and authToken as password.

The request body is JSON with src (your Plivo number), dst (destination in E.164 format), and text (message content). For multiple recipients, dst can be a comma-separated string. The response is 202 Accepted with a body containing message and message_uuid.

Ask Lovable to generate this function. After it deploys, test it from Cloud → Logs by checking that requests are arriving and Plivo is returning 202. Common issues at this stage are wrong Basic Auth encoding or a missing trailing slash in the endpoint URL — Plivo's API requires the trailing slash after /Message/.

```
// supabase/functions/plivo-sms/index.ts
import { serve } from 'https://deno.land/std@0.168.0/http/server.ts';

const corsHeaders = {
  'Access-Control-Allow-Origin': '*',
  'Access-Control-Allow-Headers': 'authorization, x-client-info, apikey, content-type',
};

serve(async (req) => {
  if (req.method === 'OPTIONS') return new Response('ok', { headers: corsHeaders });

  try {
    const authId = Deno.env.get('PLIVO_AUTH_ID')!;
    const authToken = Deno.env.get('PLIVO_AUTH_TOKEN')!;
    const fromNumber = Deno.env.get('PLIVO_PHONE_NUMBER')!;
    const { to, text } = await req.json();

    const credentials = btoa(`${authId}:${authToken}`);

    const res = await fetch(
      `https://api.plivo.com/v1/Account/${authId}/Message/`,
      {
        method: 'POST',
        headers: {
          'Authorization': `Basic ${credentials}`,
          'Content-Type': 'application/json',
        },
        body: JSON.stringify({ src: fromNumber, dst: to, text }),
      }
    );

    // Plivo returns 202 Accepted on success
    if (res.status !== 202 && !res.ok) {
      const error = await res.text();
      throw new Error(`Plivo error ${res.status}: ${error}`);
    }

    const data = await res.json();

    return new Response(
      JSON.stringify({ messageUuid: data.message_uuid, apiId: data.api_id }),
      { headers: { ...corsHeaders, 'Content-Type': 'application/json' } }
    );
  } catch (error) {
    return new Response(
      JSON.stringify({ error: error.message }),
      { status: 500, headers: { ...corsHeaders, 'Content-Type': 'application/json' } }
    );
  }
});
```

**Expected result:** A deployed plivo-sms Edge Function that sends SMS via Plivo and returns a message UUID.

### 4. Handle Plivo inbound messages and delivery receipts

Plivo can forward inbound SMS messages and delivery receipts to your Edge Functions. For inbound messages (when someone texts your Plivo number), configure the message URL in your Plivo number settings. For delivery receipts, configure the message status callback URL.

Create a second Edge Function called plivo-webhook to receive these callbacks. Plivo sends inbound messages as HTTP POST requests with fields: From, To, Text, and MessageUUID. Delivery receipts contain MessageUUID, Status (delivered, undelivered, etc.), and error codes.

Deploy the Edge Function and configure it in Plivo: go to console.plivo.com → Phone Numbers → Your Numbers → click your number → edit 'Message URL' and paste the Edge Function URL, set method to POST. For delivery receipts, the message URL receives both inbound messages and status callbacks based on the payload structure — distinguish them by checking if the Text field is present (inbound message) or only Status and MessageUUID (delivery receipt).

For complex two-way messaging workflows with conversation threading and agent assignment, RapidDev's team can help design the full inbox architecture.

**Expected result:** Plivo phone number configured with your webhook Edge Function URL, receiving inbound messages and delivery receipts in Supabase.

## Best practices

- Always include the trailing slash in Plivo API endpoint URLs — /Message/ not /Message — Plivo returns 404 without it
- Store message UUIDs returned by Plivo in your Supabase database to correlate delivery receipts with sent messages
- Use E.164 format for all phone numbers (+12025551234) — Plivo rejects national and local number formats
- Handle Plivo's 202 Accepted response as success — checking only for 200 will incorrectly treat successful sends as errors
- Configure delivery receipt callbacks to track message delivery status and retry undelivered messages if needed
- Test with a small monthly usage before scaling — Plivo's pricing is per-message with no monthly minimums, but check your account limits in the console
- For voice call integrations, host your Plivo XML Answer URL on your deployed Lovable Edge Function — the XML must be accessible at the time of call connection

## Use cases

### Low-cost SMS notification system for international users

Send transactional SMS notifications — shipping updates, appointment reminders, password resets — to users in multiple countries at competitive per-message rates. Plivo's pricing advantage is most pronounced for messaging in India, Southeast Asia, and Latin America where it is often significantly cheaper than Twilio.

Prompt example:

```
Create an SMS notification system that calls my plivo-sms Edge Function to send shipping update messages. Log each message to an sms_notifications table with recipient, message content, Plivo message UUID, and delivery status. Show a send history in the admin panel.
```

### Phone verification with OTP via Plivo

Build a phone number verification flow where users enter their number, receive a 6-digit OTP via Plivo SMS, and enter the code to verify. The Edge Function generates the OTP, sends it via Plivo, and stores a hashed version in Supabase with a short expiry for verification.

Prompt example:

```
Add phone verification to my signup flow. When a user enters their phone number, call my plivo-sms Edge Function to send a 6-digit verification code. Store the hashed code in a phone_verifications table with a 10-minute expiry. Create a verification step that checks the entered code and marks the user's phone as verified in their profile.
```

### Click-to-call feature for a sales CRM

Add a click-to-call button to contact records in a Lovable CRM. When clicked, the Edge Function uses Plivo's Calls API to initiate an outbound call from a sales rep's phone to the contact. The call answer URL returns simple Plivo XML to connect the call, and outcomes are logged in the CRM.

Prompt example:

```
Add a 'Call Contact' button to each contact card in my CRM. When clicked, call my plivo-call Edge Function with the contact's phone number. Initiate a Plivo outbound call and return the call UUID. Log the call_uuid, contact_id, initiated_at, and status to a call_logs table. Show a 'Call in progress' toast notification.
```

## Troubleshooting

### Plivo API returns 401 Unauthorized with 'Authentication credentials were not provided'

Cause: The Basic Auth header is malformed, the Auth ID is incorrect, or the secret values in Cloud → Secrets contain leading/trailing whitespace.

Solution: Open Cloud → Secrets and verify PLIVO_AUTH_ID and PLIVO_AUTH_TOKEN have no extra whitespace. The Auth ID must match the Account ID shown in your Plivo console. Confirm the Basic Auth encoding: btoa(authId + ':' + authToken) where the colon separates username from password.

```
const credentials = btoa(`${authId.trim()}:${authToken.trim()}`);
```

### Plivo API returns 404 Not Found when calling the Message endpoint

Cause: The API URL is missing the trailing slash — https://api.plivo.com/v1/Account/{authId}/Message requires a trailing slash.

Solution: Add a trailing slash to the endpoint URL in your Edge Function: https://api.plivo.com/v1/Account/${authId}/Message/ (with the slash after Message).

```
const url = `https://api.plivo.com/v1/Account/${authId}/Message/`;
```

### SMS messages are queued by Plivo (202 returned) but recipients never receive them

Cause: The destination number may be a landline, the sender number is not SMS-enabled, or there is an issue with the destination carrier.

Solution: Check the message status via the Plivo console under Logs → Message Logs. Look for the error code and message — common codes include 'Invalid to number', 'Destination not supported', and carrier-specific rejection codes. Verify the destination number is in E.164 format and is a mobile number.

### Plivo inbound webhook never fires when texting the Plivo number

Cause: The Message URL for the Plivo number is not configured, or it is pointing to the wrong Edge Function URL.

Solution: In console.plivo.com → Phone Numbers → Your Numbers, click your number and check the 'Message URL' field. It should contain your deployed Edge Function URL (not the Lovable preview URL). Set the method to POST. Save the changes and test by sending a text to the Plivo number.

## Frequently asked questions

### How does Plivo's pricing compare to Twilio for SMS?

Plivo is typically 30-50% cheaper than Twilio for international messaging, particularly in markets like India, Brazil, and Southeast Asia. For US messaging, the difference is smaller but Plivo is still generally less expensive. Check plivo.com/pricing for current rates by country, as pricing changes frequently in the CPaaS market.

### Can I send WhatsApp messages through Plivo?

Yes — Plivo supports WhatsApp Business messaging through its WhatsApp API, which requires a separate WhatsApp Business Account approved by Meta. The WhatsApp API uses different endpoints than the standard SMS API. For multi-channel messaging including WhatsApp in a unified interface, Sinch's Conversation API may be a better fit.

### Does Plivo support MMS (picture messages)?

Yes — MMS is supported for US and Canadian numbers. Add a media_urls array to your message request body with the URLs of the media files to attach. Note that MMS rates are higher than SMS rates and the files must be publicly accessible URLs.

### What is Plivo XML and do I need it for basic SMS integration?

Plivo XML (similar to Twilio's TwiML) is only needed for voice call control — it is XML returned by your Answer URL endpoint to direct how a call flows. For SMS-only integrations, you do not need Plivo XML at all. The SMS API is a simple REST call that requires no XML.

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Source: https://www.rapidevelopers.com/lovable-integration/plivo
© RapidDev — https://www.rapidevelopers.com/lovable-integration/plivo