textbelt-utils

textbelt-utils

A lightweight Python package for interacting with the Textbelt SMS API. Send SMS messages, check delivery status, and handle webhook responses with a clean, type-hinted interface.

Features

• 🚀 Simple, intuitive API
• 📝 Type hints and dataclasses for better IDE support
• ✅ Webhook verification
• 🧪 Test mode support
• 🔐 One-Time Password (OTP) support
• 🏢 Custom sender name support
• 📨 Bulk SMS support with rate limiting
• ⚡ Async/sync clients for flexibility
• 0️⃣ Zero external dependencies beyond requests

Installation

pip install textbelt-utils

Quick Start

from textbelt_utils import TextbeltClient, SMSRequest

# Initialize client
client = TextbeltClient(api_key="your_api_key")

# Send an SMS
request = SMSRequest(
    phone="[phone]",
    message="Hello from textbelt-utils!",
    key="your_api_key"
)

response = client.send_sms(request)
print(f"Message sent! ID: {response.text_id}")

Features

Send SMS

from textbelt_utils import TextbeltClient, SMSRequest

client = TextbeltClient(api_key="your_api_key")

# Basic SMS
request = SMSRequest(
    phone="[phone]",
    message="Hello!",
    key="your_api_key"
)

# SMS with webhook for replies
request_with_webhook = SMSRequest(
    phone="[phone]",
    message="Reply to this message!",
    key="your_api_key",
    reply_webhook_url="https://your-site.com/webhook",
    webhook_data="custom_data"
)

# SMS with custom sender name
request_with_sender = SMSRequest(
    phone="[phone]",
    message="Message from your company!",
    key="your_api_key",
    sender="MyCompany"  # Set a custom sender name for this message
)

response = client.send_sms(request)

Bulk SMS

Send multiple SMS messages efficiently with rate limiting and batching:

from textbelt_utils import TextbeltClient, BulkSMSRequest

client = TextbeltClient(api_key="your_api_key")

# Send same message to multiple recipients
request = BulkSMSRequest(
    phones=["[phone]", "[phone]"],
    message="Broadcast message to all recipients!",
    batch_size=100,  # Process in batches of 100
    delay_between_messages=0.1  # 100ms delay between messages
)

# Or send individual messages to each recipient
request = BulkSMSRequest(
    phones=["[phone]", "[phone]"],
    individual_messages={
        "[phone]": "Custom message for recipient 1",
        "[phone]": "Different message for recipient 2"
    },
    batch_size=100,
    delay_between_messages=0.1
)

response = client.send_bulk_sms(request)
print(f"Total messages: {response.total_messages}")
print(f"Successful: {response.successful_messages}")
print(f"Failed: {response.failed_messages}")

# Check individual results
for phone, result in response.results.items():
    if result.text_id:
        status = client.check_status(result.text_id)
        print(f"{phone}: {status.status}")

Async Bulk SMS

Send messages concurrently with proper rate limiting:

from textbelt_utils import AsyncTextbeltClient, BulkSMSRequest
import asyncio

async def send_bulk():
    async with AsyncTextbeltClient(api_key="your_api_key") as client:
        request = BulkSMSRequest(
            phones=["[phone]", "[phone]"],
            message="Async bulk message!",
            batch_size=100,  # Process 100 messages concurrently
            delay_between_messages=0.1
        )
        
        response = await client.send_bulk_sms(request)
        print(f"Sent: {response.successful_messages}")
        print(f"Failed: {response.failed_messages}")

asyncio.run(send_bulk())

Sender Name

You can set a sender name for your SMS messages in two ways:

• Account-wide: Set a default sender name in your Textbelt account settings at https://textbelt.com/account
• Per-message: Set the sender parameter in your SMSRequest

The sender name is used for compliance purposes and helps recipients identify who sent the message. If you don't specify a sender name, Textbelt will automatically append your default sender name to the message (unless it already appears in the message content).

# Example with custom sender name
request = SMSRequest(
    phone="[phone]",
    message="Important update!",
    key="your_api_key",
    sender="MyCompany"  # This overrides your account's default sender name
)

Note: The sender name is used strictly for compliance purposes and does not override the "From" number for the SMS sender.

Check Message Status

status = client.check_status("text_id")
print(f"Message status: {status.status}")  # DELIVERED, SENT, SENDING, etc.

Check Quota

quota = client.check_quota()
print(f"Remaining messages: {quota.quota_remaining}")

Test Mode

# Send a test message (doesn't use quota)
response = client.send_test(request)

Webhook Verification

from textbelt_utils.utils import verify_webhook

is_valid = verify_webhook(
    api_key="your_api_key",
    timestamp="webhook_timestamp",
    signature="webhook_signature",
    payload="webhook_payload"
)

One-Time Password (OTP)

The package provides built-in support for generating and verifying one-time passwords:

from textbelt_utils import AsyncTextbeltClient, OTPGenerateRequest, OTPVerifyRequest

async def handle_otp():
    async with AsyncTextbeltClient(api_key="your_api_key") as client:
        # Generate and send OTP
        generate_request = OTPGenerateRequest(
            phone="[phone]",
            userid="[e-mail]",  # Unique identifier for your user
            key="your_api_key",
            message="Your verification code is $OTP",  # Optional custom message
            lifetime=180,  # Optional validity duration in seconds (default: 180)
            length=6      # Optional code length (default: 6)
        )
        
        response = await client.generate_otp(generate_request)
        print(f"OTP sent! Message ID: {response.text_id}")
        
        # Later, verify the OTP entered by the user
        verify_request = OTPVerifyRequest(
            otp="123456",    # Code entered by user
            userid="[e-mail]",  # Same userid used in generate
            key="your_api_key"
        )
        
        verify_response = await client.verify_otp(verify_request)
        if verify_response.is_valid_otp:
            print("OTP verified successfully!")
        else:
            print("Invalid OTP")

OTP Features

• Custom Messages: Use the $OTP placeholder in your message to control where the code appears
• Configurable Lifetime: Set how long the code remains valid (30-3600 seconds)
• Configurable Length: Choose the number of digits in the code (4-10 digits)
• No Extra Cost: OTP functionality is included in your regular SMS quota
• Automatic Cleanup: Invalid/expired codes are automatically cleaned up
• Input Validation: Built-in validation for phone numbers, message length, and code format

Error Handling

The package provides specific exceptions for different error cases:

from textbelt_utils.exceptions import (
    QuotaExceededError,
    InvalidRequestError,
    WebhookVerificationError,
    APIError
)

try:
    response = client.send_sms(request)
except QuotaExceededError:
    print("Out of quota!")
except InvalidRequestError as e:
    print(f"Invalid request: {e}")
except WebhookVerificationError:
    print("Webhook verification failed")
except APIError as e:
    print(f"API error: {e}")

Asynchronous Usage

from textbelt_utils import AsyncTextbeltClient, SMSRequest
import asyncio

async def main():
    async with AsyncTextbeltClient(api_key="your_api_key") as client:
        # Send SMS
        request = SMSRequest(
            phone="[phone]",
            message="Async hello!",
            key="your_api_key"
        )
        response = await client.send_sms(request)
        
        # Check status
        status = await client.check_status(response.text_id)
        
        # Check quota
        quota = await client.check_quota()

if __name__ == "__main__":
    asyncio.run(main())

Mixed Sync/Async Usage

from textbelt_utils import TextbeltClient, AsyncTextbeltClient, SMSRequest

# Synchronous
sync_client = TextbeltClient(api_key="your_api_key")
sync_response = sync_client.send_sms(request)

# Asynchronous
async def send_async():
    async with AsyncTextbeltClient(api_key="your_api_key") as client:
        async_response = await client.send_sms(request)

Development

Environment Setup

• Copy the environment template:

cp .env.template .env

• Edit .env with your configuration:

# Textbelt API Configuration
TEXTBELT_API_KEY=your_api_key_here

# Test Phone Numbers (E.164 format)
TEXTBELT_TEST_PHONE=your_test_phone_here
TEXTBELT_TEST_PHONE2=your_second_test_phone_here

The package automatically loads environment variables from your .env file on import. You can also explicitly load or reload configuration:

from textbelt_utils import load_config, get_env_var

# Load default .env file
load_config()

# Load specific env file
load_config(".env.test")

# Get environment variables with helpful error messages
api_key = get_env_var('TEXTBELT_API_KEY')
test_phone = get_env_var('TEXTBELT_TEST_PHONE')

# Get with default value
debug_mode = get_env_var('DEBUG', 'false')

For testing, you can use .env.test which contains safe test values:

# Use test environment
cp .env.test .env

# Or specify a different env file in code
load_config(".env.test")

Running Tests

poetry run python -m unittest discover tests

Testing Your Integration

Testing SMS

The package includes test scripts in the scripts directory to help you verify your Textbelt integration. To use them:

• Set up your environment variables:

export TEXTBELT_API_KEY=your_api_key_here
export TEXTBELT_TEST_PHONE=your_phone_number_here  # E.164 format, e.g., [phone]

• Run the test scripts:

# Test basic SMS
poetry run python scripts/test_send.py

# Test async SMS
poetry run python scripts/test_send_async.py

# Test bulk SMS
poetry run python scripts/test_bulk_send.py

The scripts will:

• Send test messages (using test mode, won't use your quota)
• Display message IDs and delivery status
• Show your remaining quota

Testing OTP

The package also includes an OTP test script:

# Using environment variables
poetry run python scripts/test_otp.py

# Or provide values directly
poetry run python scripts/test_otp.py --phone [phone] --key your_api_key

Security Note

• Never commit test scripts with actual phone numbers or API keys
• Always use environment variables for sensitive data
• Add test scripts to your .gitignore if you modify them with any sensitive data

Contributing

• Fork the repository
• Create a feature branch (git checkout -b feature/amazing-feature)
• Commit your changes (git commit -m 'Add amazing feature')
• Push to the branch (git push origin feature/amazing-feature)
• Open a Pull Request

TODO

High Priority

• Add comprehensive webhook support
  • Add webhook handler/router functionality
  • Add webhook signature verification middleware
  • Add example webhook handlers for common use cases
  • Document webhook payload structure and events
  • Add webhook testing utilities
• Add retry mechanism for failed API calls

Medium Priority

• Add rate limiting configuration options
• Add logging configuration options
• Add support for scheduling messages
• Add support for message templates
• Add support for contact lists/groups

Low Priority

• Add message history tracking
• Add support for delivery reports
• Add support for analytics and reporting
• Add CLI tool for common operations