ClickSend SMS (clicksend-sms)

ClickSend is a global business communications platform for sending and receiving SMS, MMS, voice, email, fax, and physical post via API or web dashboard, with direct carrier routing and a 99.95% uptime SLA. The ClickSend REST API v3 provides endpoints for SMS, MMS, voice, email, fax, post letters, contacts, accounts, and webhooks, secured with HTTP Basic Authentication using a username and API key.

APIs.json: https://raw.githubusercontent.com/api-evangelist/clicksend-sms/refs/heads/main/apis.yml

Scope

• Type: Index

Tags

• SMS
• MMS
• Messaging
• Voice
• Email
• Fax
• Direct Mail
• Communications

Timestamps

• Created: 2026-05-11
• Modified: 2026-05-11

APIs

ClickSend REST API v3

REST API v3 for ClickSend covering SMS, MMS, voice broadcasts, email, fax, post letters and postcards, contact lists, accounts, subaccounts, and webhook subscriptions. Authentication uses HTTP Basic Auth with account username and API key. An OpenAPI/Swagger specification is published in the official ClickSend SDK repositories on GitHub.

• Human URL: https://developers.clicksend.com/docs/
• Base URL: https://rest.clicksend.com/v3

Tags

• SMS
• MMS
• Voice
• Email
• Fax
• Post
• Contacts
• Basic Auth

Properties

• Documentation
• OpenAPI — OpenAPI Specification
• A P I Portal
• GitHub Organization
• Postman Collection — Postman Collection 2.1
• Open Collection — Open Collection 1.0

Common Properties

• LinkedIn
• Website
• Documentation
• Pricing
• Sign Up
• Knowledge Base
• Integrations
• Blog

Maintainers

FN: Kin Lane Email: kin@apievangelist.com