ClickSend

Send one or more SMS messages (POST /sms/send). Body carries a messages[] array of {source, body, to, from, schedule, custom_string, ...}.

Calculate the total price for a batch of SMS messages without sending (POST /sms/price).

List sent SMS messages with date filters (GET /sms/history). Supports date_from/date_to (epoch), page and limit.

Export SMS history to CSV (GET /sms/history/export).

List received (inbound) SMS messages (GET /sms/inbound). Polling source for reply-based automations; supports date_from/date_to (epoch), page and limit.

Mark inbound SMS messages as read (PUT /sms/inbound-read). Omit message_id in the body to mark all as read.

List delivery receipts for sent SMS (GET /sms/receipts). Polling source for delivery-status automations.

Mark delivery receipts as read (PUT /sms/delivery-receipts-read). Omit message_id to mark all.

Cancel a scheduled SMS message before it is sent (PUT /sms/{messageId}/cancel).

Cancel all scheduled SMS messages (PUT /sms/cancel-all).

List saved SMS templates (GET /sms/templates).

Create a reusable SMS template (POST /sms/templates).

Update an SMS template (PUT /sms/templates/{templateId}).

Delete an SMS template (DELETE /sms/templates/{templateId}).

List contact lists (GET /lists).

Get a single contact list (GET /lists/{listId}).

Create a contact list (POST /lists).

Rename a contact list (PUT /lists/{listId}).

Delete a contact list and its contacts (DELETE /lists/{listId}).

Import contacts into a list from a file URL (POST /lists/{listId}/import).

Export a list's contacts to CSV (GET /lists/{listId}/export/{filename}).

Remove duplicate contacts from a list (PUT /lists/{listId}/remove-duplicate).

List contacts in a list (GET /lists/{listId}/contacts).

Get a single contact (GET /lists/{listId}/contacts/{contactId}).

Add a contact to a list (POST /lists/{listId}/contacts).

Update a contact (PUT /lists/{listId}/contacts/{contactId}).

Remove a contact from a list (DELETE /lists/{listId}/contacts/{contactId}).

Send a physical letter via post (POST /post/letters/send). Body carries file_url (PDF), messages[] recipient addresses, and options (colour, duplex, priority_post).

Calculate the price for a letter mailout without sending (POST /post/letters/price).

List sent letters with date filters (GET /post/letters/history).

Send a physical postcard via post (POST /post/postcards/send).

Calculate the price for a postcard mailout without sending (POST /post/postcards/price).

List sent postcards with date filters (GET /post/postcards/history).

Send one or more text-to-speech voice messages (POST /voice/send). Body carries a messages[] array of {source, body, to, voice, lang, custom_string, machine_detection, schedule}.

Calculate the total price for a batch of voice messages without sending (POST /voice/price).

List sent voice messages with date filters (GET /voice/history).

List supported text-to-speech voice languages and voices (GET /voice/lang).

Cancel a scheduled voice message (PUT /voice/{messageId}/cancel).

Cancel all scheduled voice messages (PUT /voice/cancel-all).

Send a transactional email (POST /email/send). Body carries to[], from{email_address_id,name}, subject, body, cc[], bcc[], attachments[].

List sent emails with date filters (GET /email/history).

List verified 'from' email addresses (GET /email/addresses). Each entry's email_address_id is used as email from.email_address_id.

Register a new 'from' email address (POST /email/addresses); ClickSend sends a verification email.

Delete a verified 'from' email address (DELETE /email/addresses/{emailAddressId}).

List inbound-SMS automation rules that forward replies to a URL/email (GET /automations/sms/inbound).

Create an inbound-SMS rule that forwards replies to a URL (action=URL) or email (POST /automations/sms/inbound). This is how ClickSend registers a delivery/reply callback URL.

Update an inbound-SMS rule (PUT /automations/sms/inbound/{ruleId}).

Delete an inbound-SMS rule (DELETE /automations/sms/inbound/{ruleId}).

List email marketing campaigns (GET /email-campaigns).

Get a single email campaign (GET /email-campaigns/{campaignId}).

Create an email marketing campaign (POST /email-campaigns).

Update an existing email campaign (PUT /email-campaigns/{campaignId}).

List subaccounts (GET /subaccounts).

Get a single subaccount (GET /subaccounts/{subaccountId}).

Create a subaccount (POST /subaccounts).

Delete a subaccount (DELETE /subaccounts/{subaccountId}).

Get the authenticated account's details (GET /account). Identity + connectivity probe.

Trigger a verification token to the account owner via SMS or voice (PUT /account/verify/{contactType}/send).

Confirm the account verification code the owner received (PUT /account/verify/{code}/verify).

Send one or more MMS messages (POST /mms/send). Body carries media_file plus a messages[] array of {source, subject, body, to, from}.

Calculate the total price for a batch of MMS messages without sending (POST /mms/price).

List sent MMS messages with date filters (GET /mms/history).

List the account's rental (dedicated) numbers (GET /numbers).

Purchase/rent an available number (PUT /numbers/{dedicatedNumber}).

Get monthly account usage broken down by product (GET /account-usage/{year}/{month}).

List supported countries reference data (GET /countries).

Send an SMS message from an email gateway request (POST /email-to-sms/send).

List email addresses allowed to use the Email-to-SMS gateway (GET /email-to-sms-allowed).

Search available numbers to rent/buy (GET /search/number).

Send an SMS-to-email message (POST /sms-to-email/send) — an inbound-style SMS routed to an email address.

Get aggregate SMS delivery statistics (GET /statistics/sms).

List supported timezones reference data (GET /timezones).