sendly 3.37.1

Official Sendly Python SDK for SMS messaging

sendly

Official Python SDK for the Sendly SMS API.

Installation

# pip
pip install sendly

# poetry
poetry add sendly

# pipenv
pipenv install sendly

Requirements

• Python 3.8+
• A Sendly API key (get one here)

Quick Start

from sendly import Sendly

# Initialize with your API key
client = Sendly('sk_live_v1_your_api_key')

# Send an SMS
message = client.messages.send(
    to='[phone]',
    text='Hello from Sendly!'
)

print(f'Message sent: {message.id}')
print(f'Status: {message.status}')

Prerequisites for Live Messaging

Before sending live SMS messages, you need:

1. Business Verification - Complete verification in the Sendly dashboard

   • International: Instant approval (just provide Sender ID)
   • US/Canada: Requires carrier approval (3-7 business days)

2. Credits - Add credits to your account

   • Test keys (sk_test_*) work without credits (sandbox mode)
   • Live keys (sk_live_*) require credits for each message

3. Live API Key - Generate after verification + credits

   • Dashboard → API Keys → Create Live Key

Test vs Live Keys

Key Type	Prefix	Credits Required	Verification Required	Use Case
Test	sk_test_v1_*	No	No	Development, testing
Live	sk_live_v1_*	Yes	Yes	Production messaging

Note: You can start development immediately with a test key. Messages to sandbox test numbers are free and don't require verification.

Features

• ✅ Full type hints (PEP 484)
• ✅ Sync and async clients
• ✅ Automatic retries with exponential backoff
• ✅ Rate limit handling
• ✅ Pydantic models for data validation
• ✅ Python 3.8+ support

Usage

Sending Messages

from sendly import Sendly

client = Sendly('sk_live_v1_xxx')

# Basic usage (marketing message - default)
message = client.messages.send(
    to='[phone]',
    text='Check out our new features!'
)

# Transactional message (bypasses quiet hours)
message = client.messages.send(
    to='[phone]',
    text='Your verification code is: 123456',
    message_type='transactional'
)

# With custom sender ID (international)
message = client.messages.send(
    to='[phone]',
    text='Hello from MyApp!',
    from_='MYAPP'
)

# With custom metadata (max 4KB)
message = client.messages.send(
    to='[phone]',
    text='Your order #12345 has shipped!',
    metadata={
        'order_id': '12345',
        'customer_id': 'cust_abc'
    }
)

Listing Messages

# Get recent messages (default limit: 50)
result = client.messages.list()
print(f'Found {result.count} messages')

# Get last 10 messages
result = client.messages.list(limit=10)

# Iterate through messages
for msg in result.data:
    print(f'{msg.to}: {msg.status}')

Getting a Message

message = client.messages.get('msg_xxx')

print(f'Status: {message.status}')
print(f'Delivered: {message.delivered_at}')

Scheduling Messages

# Schedule a message for future delivery
scheduled = client.messages.schedule(
    to='[phone]',
    text='Your appointment is tomorrow!',
    scheduled_at='2025-01-15T10:00:00Z'
)

print(f'Scheduled: {scheduled.id}')
print(f'Will send at: {scheduled.scheduled_at}')

# List scheduled messages
result = client.messages.list_scheduled()
for msg in result.data:
    print(f'{msg.id}: {msg.scheduled_at}')

# Get a specific scheduled message
msg = client.messages.get_scheduled('sched_xxx')

# Cancel a scheduled message (refunds credits)
result = client.messages.cancel_scheduled('sched_xxx')
print(f'Refunded: {result.credits_refunded} credits')

Batch Messages

# Send multiple messages in one API call (up to 1000)
batch = client.messages.send_batch(
    messages=[
        {'to': '[phone]', 'text': 'Hello User 1!'},
        {'to': '[phone]', 'text': 'Hello User 2!'},
        {'to': '[phone]', 'text': 'Hello User 3!'}
    ]
)

print(f'Batch ID: {batch.batch_id}')
print(f'Queued: {batch.queued}')
print(f'Failed: {batch.failed}')
print(f'Credits used: {batch.credits_used}')

# Get batch status
status = client.messages.get_batch('batch_xxx')

# List all batches
result = client.messages.list_batches()

# Preview batch (dry run) - validates without sending
preview = client.messages.preview_batch(
    messages=[
        {'to': '[phone]', 'text': 'Hello User 1!'},
        {'to': '[phone]', 'text': 'Hello UK!'}
    ]
)
print(f"Credits needed: {preview['creditsNeeded']}")
print(f"Will send: {preview['willSend']}, Blocked: {preview['blocked']}")

Rate Limit Information

# After any API call, check rate limit status
client.messages.send(to='+1555...', text='Hello!')

rate_limit = client.get_rate_limit_info()
if rate_limit:
    print(f'{rate_limit.remaining}/{rate_limit.limit} requests remaining')
    print(f'Resets in {rate_limit.reset} seconds')

Async Client

For async/await support, use AsyncSendly:

import asyncio
from sendly import AsyncSendly

async def main():
    async with AsyncSendly('sk_live_v1_xxx') as client:
        # Send a message
        message = await client.messages.send(
            to='[phone]',
            text='Hello from async!'
        )
        print(message.id)

        # List messages
        result = await client.messages.list(limit=10)
        for msg in result.data:
            print(f'{msg.to}: {msg.status}')

asyncio.run(main())

Configuration

from sendly import Sendly, SendlyConfig

# Using keyword arguments
client = Sendly(
    api_key='sk_live_v1_xxx',
    base_url='https://sendly.live/api/v1',  # Optional
    timeout=60.0,  # Optional: seconds (default: 30)
    max_retries=5  # Optional: (default: 3)
)

# Using config object
config = SendlyConfig(
    api_key='sk_live_v1_xxx',
    timeout=60.0,
    max_retries=5
)
client = Sendly(config=config)

Webhooks

Manage webhook endpoints to receive real-time delivery status updates.

# Create a webhook endpoint
webhook = client.webhooks.create(
    url='https://example.com/webhooks/sendly',
    events=['message.delivered', 'message.failed']
)

print(f'Webhook ID: {webhook.id}')
print(f'Secret: {webhook.secret}')  # Store this securely!

# List all webhooks
webhooks = client.webhooks.list()

# Get a specific webhook
wh = client.webhooks.get('whk_xxx')

# Update a webhook
client.webhooks.update('whk_xxx',
    url='https://new-endpoint.example.com/webhook',
    events=['message.delivered', 'message.failed', 'message.sent']
)

# Test a webhook (sends a test event)
result = client.webhooks.test('whk_xxx')
print(f'Test {"passed" if result.success else "failed"}')

# Rotate webhook secret
rotation = client.webhooks.rotate_secret('whk_xxx')
print(f'New secret: {rotation.secret}')

# View delivery history
deliveries = client.webhooks.get_deliveries('whk_xxx')

# Retry a failed delivery
client.webhooks.retry_delivery('whk_xxx', 'del_yyy')

# Delete a webhook
client.webhooks.delete('whk_xxx')

Verifying Webhook Signatures

from sendly import Webhooks

WEBHOOK_SECRET = 'your_webhook_secret'

# In your webhook handler (Flask example)
@app.route('/webhooks/sendly', methods=['POST'])
def handle_webhook():
    signature = request.headers.get('X-Sendly-Signature')
    timestamp = request.headers.get('X-Sendly-Timestamp')
    payload = request.get_data(as_text=True)

    try:
        event = Webhooks.parse_event(payload, signature, WEBHOOK_SECRET, timestamp=timestamp)

        if event.type == 'message.delivered':
            print(f'Message {event.data.id} delivered')
        elif event.type == 'message.failed':
            print(f'Message {event.data.id} failed: {event.data.error_code}')

        return 'OK', 200
    except Exception as e:
        print(f'Invalid signature: {e}')
        return 'Invalid signature', 400

Account & Credits

# Get account information
account = client.account.get()
print(f'Email: {account.email}')

# Check credit balance
credits = client.account.get_credits()
print(f'Available: {credits.available_balance} credits')
print(f'Reserved (scheduled): {credits.reserved_balance} credits')
print(f'Total: {credits.balance} credits')

# View credit transaction history
transactions = client.account.get_credit_transactions()
for tx in transactions:
    print(f'{tx.type}: {tx.amount} credits - {tx.description}')

# List API keys
keys = client.account.list_api_keys()
for key in keys:
    print(f'{key.name}: {key.prefix}*** ({key.type})')

# Get API key usage stats
usage = client.account.get_api_key_usage('key_xxx')
print(f"Messages sent: {usage['messagesSent']}")
print(f"Credits used: {usage['creditsUsed']}")

# Create a new API key
result = client.account.create_api_key('Production Key')
print(f"New key: {result['key']}")  # Only shown once!

# Rotate an API key (old key keeps working for a 24h grace period by default)
rotation = client.account.rotate_api_key('key_xxx')
print(f"New key: {rotation['newKey']['key']}")  # Only shown once!

# Rotate with a wider overlap window (24-168 hours)
rotation = client.account.rotate_api_key('key_xxx', grace_period_hours=72)

# Revoke an API key
client.account.revoke_api_key('key_xxx')

Phone Numbers

Search for and buy phone numbers. Prices on available numbers are already customer-priced. Requires an API key with the numbers:read / numbers:write scopes.

# List the countries where numbers are available
countries = client.numbers.list_countries()
for country in countries.countries:
    print(f'{country.code} {country.name}: {country.number_types}')

# Search for available numbers (already customer-priced)
available = client.numbers.list_available(country='GB', type='mobile')
for num in available.numbers:
    print(f'{num.phone_number} — {num.monthly_cost} {num.currency}')

# Optionally filter by a digit pattern
available = client.numbers.list_available(country='GB', type='mobile', contains='777')

# List the numbers you already own
owned = client.numbers.list()
for num in owned.numbers:
    print(f'{num.phone_number} ({num.status})')

# Get one owned number (includes whether it's your default sender)
number = client.numbers.get('num_xxx')
print(f'{number.phone_number} default={number.is_default}')

# Make a number your default sender
client.numbers.update('num_xxx', is_default=True)

# Cancel a scheduled release and keep the number
client.numbers.update('num_xxx', pending_cancellation=False)

# Release a number (a paid number is kept until the end of the billed period)
result = client.numbers.release('num_xxx')
if result.scheduled:
    print(f'Releases at {result.scheduled_release_at}')
else:
    print('Released')

# Buy a number
chosen = available.numbers[0]
result = client.numbers.buy(
    phone_number=chosen.phone_number,
    country_code='GB',
    phone_number_type='mobile',
    monthly_cost=chosen.monthly_cost,
)

if result.status == 'provisioning':
    print(f'Provisioning {result.number.phone_number}')
elif result.status in ('documents_required', 'payment_required'):
    # Hand the user the hosted Sendly page + code, wait for them to finish,
    # then call buy() again with the same arguments plus action_code set to
    # the completed action's code.
    print(f'Open {result.action.url} and enter code {result.action.code}')
    # ...later, after the user completes the page...
    result = client.numbers.buy(
        phone_number=chosen.phone_number,
        country_code='GB',
        phone_number_type='mobile',
        monthly_cost=chosen.monthly_cost,
        action_code=result.action.code,
    )

10DLC (Local Number Texting)

Register your business for carrier review so you can text from local (10-digit) US numbers. Requires an API key with the tendlc:read / tendlc:write scopes; writes need a live key. The flow has three steps: brand → campaign → assign a number.

# 1. Register a brand and poll until it's verified
brand = client.ten_dlc.create_brand(
    legal_name='Acme Holdings LLC',
    ein='12-3456789',
    website='https://acme.example',
    email='[e-mail]',
).data
# ...poll client.ten_dlc.get_brand(brand.id) until brand.status == 'verified'
# (or 'failed', with brand.failure_reasons explaining why)

# 2. Pre-check the use case, then create a campaign
check = client.ten_dlc.qualify(brand.id, 'MIXED').data
if check.qualified:
    campaign = client.ten_dlc.create_campaign(
        brand_id=brand.id,
        use_case='MIXED',
        description='Order updates and support replies for Acme customers',
        message_flow='Customers opt in at checkout on acme.example',
        sample_messages=['Your order #123 has shipped!'],
        opt_out_keywords='STOP',
    ).data
    # ...poll client.ten_dlc.get_campaign(campaign.id) until status == 'active'

    # 3. Assign a number you own; it can send once the assignment is 'Active'
    assignment = client.ten_dlc.assign_number(campaign.id, '[phone]').data
    print(assignment.status)

# List what you have registered
brands = client.ten_dlc.list_brands()
campaigns = client.ten_dlc.list_campaigns()
assignments = client.ten_dlc.list_assignments()

Group MMS

Send one message to 2-8 US/Canada recipients who share a single thread; replies fan out to everyone. Provide text, media_urls, or both. Requires the group_mms feature.

group = client.messages.send_group(
    to=['[phone]', '[phone]'],
    text='Dinner at 7?'
)
print(f'{group.id}: {group.status}')  # 'sent' (or 'delivered' on a test key)
print(group.group_message_id)         # stable group thread id, when available

# With media
client.messages.send_group(
    to=['[phone]', '[phone]'],
    text='Here is the menu',
    media_urls=['https://example.com/menu.jpg'],
)

AI Enhance

Polish message copy before sending. Pass text and/or a message_type to steer the tone.

result = client.messages.enhance(text='ur order shipped', message_type='transactional')
print(result.enhanced)     # cleaned-up copy
print(result.explanation)  # why it changed

Branded Links (URL Shortener)

Mint branded short links for a destination URL, list them with click analytics, and flip a per-link kill switch. Branded, owned-domain links improve deliverability and give you click data. Gated behind the url_shortener flag.

# Shorten a URL
link = client.links.create('https://example.com/spring-sale?utm_source=sms')
print(link.short_url)        # https://sendly.live/l/Ab3xY7
print(link.code)             # Ab3xY7

# List your links with click counts and a 14-day daily histogram
listing = client.links.list(limit=20)
print(f'{listing.total} links')
for lk in listing.links:
    print(f'{lk.short_url} -> {lk.destination_url} ({lk.click_count} clicks)')

# Kill a link (its redirect 404s until re-enabled)
client.links.disable(link.code)
client.links.enable(link.code)

Error Handling

The SDK provides typed exception classes:

from sendly import (
    Sendly,
    SendlyError,
    AuthenticationError,
    RateLimitError,
    InsufficientCreditsError,
    ValidationError,
    NotFoundError,
)

client = Sendly('sk_live_v1_xxx')

try:
    message = client.messages.send(
        to='[phone]',
        text='Hello!'
    )
except AuthenticationError as e:
    print(f'Invalid API key: {e.message}')
except RateLimitError as e:
    print(f'Rate limited. Retry after {e.retry_after} seconds')
except InsufficientCreditsError as e:
    print(f'Need {e.credits_needed} credits, have {e.current_balance}')
except ValidationError as e:
    print(f'Invalid request: {e.message}')
except NotFoundError as e:
    print(f'Resource not found: {e.message}')
except SendlyError as e:
    print(f'API error [{e.code}]: {e.message}')

Testing (Sandbox Mode)

Use a test API key (sk_test_v1_xxx) for testing:

from sendly import Sendly, SANDBOX_TEST_NUMBERS

client = Sendly('sk_test_v1_xxx')

# Check if in test mode
print(client.is_test_mode())  # True

# Use sandbox test numbers
message = client.messages.send(
    to=SANDBOX_TEST_NUMBERS.SUCCESS,  # [phone]
    text='Test message'
)

# Test error scenarios
message = client.messages.send(
    to=SANDBOX_TEST_NUMBERS.INVALID,  # [phone]
    text='This will fail'
)

Available Test Numbers

Number	Behavior
[phone]	Success (instant)
[phone]	Fails: invalid_number
[phone]	Fails: unroutable_destination
[phone]	Fails: queue_full
[phone]	Fails: rate_limit_exceeded
[phone]	Fails: carrier_violation

Pricing Tiers

from sendly import CREDITS_PER_SMS, SUPPORTED_COUNTRIES, PricingTier

# Credits per SMS by tier
print(CREDITS_PER_SMS[PricingTier.DOMESTIC])  # 2 (US/Canada)
print(CREDITS_PER_SMS[PricingTier.TIER1])     # 8 (UK, Poland, etc.)
print(CREDITS_PER_SMS[PricingTier.TIER2])     # 12 (France, Japan, etc.)
print(CREDITS_PER_SMS[PricingTier.TIER3])     # 16 (Germany, Italy, etc.)

# Supported countries by tier
print(SUPPORTED_COUNTRIES[PricingTier.DOMESTIC])  # ['US', 'CA']
print(SUPPORTED_COUNTRIES[PricingTier.TIER1])     # ['GB', 'PL', ...]

Utilities

The SDK exports validation utilities:

from sendly import (
    validate_phone_number,
    get_country_from_phone,
    is_country_supported,
    calculate_segments,
)

# Validate phone number format
validate_phone_number('[phone]')  # OK
validate_phone_number('555-1234')  # Raises ValidationError

# Get country from phone number
get_country_from_phone('[phone]')  # 'GB'
get_country_from_phone('[phone]')   # 'US'

# Check if country is supported
is_country_supported('GB')  # True
is_country_supported('XX')  # False

# Calculate SMS segments
calculate_segments('Hello!')  # 1
calculate_segments('A' * 200)  # 2

Type Hints

The SDK is fully typed. Import types for your IDE:

from sendly import (
    SendlyConfig,
    SendMessageRequest,
    Message,
    MessageStatus,
    ListMessagesOptions,
    MessageListResponse,
    RateLimitInfo,
    PricingTier,
)

Context Manager

Both sync and async clients support context managers:

# Sync
with Sendly('sk_live_v1_xxx') as client:
    message = client.messages.send(to='+1555...', text='Hello!')

# Async
async with AsyncSendly('sk_live_v1_xxx') as client:
    message = await client.messages.send(to='+1555...', text='Hello!')

API Reference

Sendly / AsyncSendly

Constructor

Sendly(
    api_key: str,
    base_url: str = 'https://sendly.live/api/v1',
    timeout: float = 30.0,
    max_retries: int = 3,
)

Properties

• messages - Messages resource
• base_url - Configured base URL

Methods

• is_test_mode() - Returns True if using a test API key
• get_rate_limit_info() - Returns current rate limit info
• close() - Close the HTTP client

client.messages

send(to, text, from_=None) -> Message

Send an SMS message.

list(limit=None) -> MessageListResponse

List sent messages.

get(id) -> Message

Get a specific message by ID.

client.numbers

list_countries() -> NumberCountriesResponse

List the countries where numbers can be searched and purchased.

list_available(country, type, contains=None) -> AvailableNumbersResponse

Search for available numbers, already customer-priced.

list() -> OwnedNumbersResponse

List the numbers the account already owns.

buy(phone_number, country_code, phone_number_type, monthly_cost, action_code=None) -> BuyNumberResponse

Buy a number. Returns status of provisioning, documents_required, or payment_required; when documents/payment are required, action carries a hosted page URL + code to hand to the user before re-calling with action_code.

client.ten_dlc

list_brands() -> TenDlcBrandListResponse

List the brands registered for carrier review.

create_brand(legal_name, dba=None, ein=None, entity_type=None, ...) -> TenDlcBrandResponse

Register a brand for carrier review — step 1 of enabling local-number texting. The brand starts pending; poll get_brand() until it becomes verified.

get_brand(id) -> TenDlcBrandResponse

Fetch one brand; also refreshes its carrier-review status, so polling shows progress (pending → verified/failed).

qualify(brand_id, use_case) -> TenDlcQualifyResponse

Pre-check whether a use case qualifies for a brand on the carrier network before creating a campaign.

list_campaigns() -> TenDlcCampaignListResponse

List your messaging campaigns.

create_campaign(brand_id, use_case, description, message_flow, sample_messages, ...) -> TenDlcCampaignResponse

Create a campaign under a verified brand and submit it for carrier review. Starts pending; poll get_campaign() until it becomes active.

get_campaign(id) -> TenDlcCampaignResponse

Fetch one campaign; also refreshes its carrier-review status, including throughput once carriers approve.

assign_number(campaign_id, phone_number) -> TenDlcAssignmentResponse

Assign a number you own to an active campaign, making the number sendable. Idempotent — re-assigning the same number to the same campaign returns the existing assignment.

list_assignments() -> TenDlcAssignmentListResponse

List your number-to-campaign assignments.

Enterprise

The Enterprise API lets you programmatically manage workspaces, verification, credits, and API keys for multi-tenant platforms. Requires an enterprise master key (sk_live_v1_master_*).

Quick Provision

Create a fully configured workspace in a single call:

from sendly import Sendly

client = Sendly('sk_live_v1_master_YOUR_KEY')

# Inherit verification from an existing workspace (fastest)
result = client.enterprise.provision({
    "name": "Acme Insurance - Austin",
    "sourceWorkspaceId": "ws_verified",
    "creditAmount": 5000,
    "creditSourceWorkspaceId": "SOURCE_WORKSPACE_ID",
    "keyName": "Production",
    "keyType": "live",
    "generateOptInPage": True
})

print(result["workspace"]["id"])
print(result["key"]["key"])
print(result["optInPage"]["url"])

Three provisioning modes:

Mode	Params	Description
Inherit	sourceWorkspaceId	Shares toll-free number from verified workspace
Inherit + New Number	sourceWorkspaceId + inheritWithNewNumber: True	Copies business info, purchases new number
Fresh	verification: { ... }	Full business details, new number + carrier approval

Workspace Management

ws = client.enterprise.workspaces.create(name="Acme Insurance")

result = client.enterprise.workspaces.list()
for ws in result.workspaces:
    print(f"{ws.name}: {ws.verification_status}")

detail = client.enterprise.workspaces.get("ws_xxx")

client.enterprise.workspaces.delete("ws_xxx")

Credits & API Keys

client.enterprise.workspaces.transfer_credits(
    "ws_dest",
    source_workspace_id="ws_source",
    amount=5000,
)

key = client.enterprise.workspaces.create_key(
    "ws_xxx",
    name="Production",
    type="live",
)
print(key.key)

client.enterprise.workspaces.revoke_key("ws_xxx", "key_abc")

Webhooks & Analytics

client.enterprise.webhooks.set(url="https://yourapp.com/webhooks")

overview = client.enterprise.analytics.overview()
messages = client.enterprise.analytics.messages(period="30d")
delivery = client.enterprise.analytics.delivery()

Full enterprise docs: sendly.live/docs/enterprise

---

Support

• 📚 Documentation
• 💬 Discord
• 📧 [e-mail]

License

MIT