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ClickSend SMS API

Send and view SMS messages.

ClickSend SMS API is one of 10 APIs that ClickSend publishes on the APIs.io network, described by a machine-readable OpenAPI specification.

Tagged areas include SMS. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, and an API reference.

This API exposes 5 operations across 5 paths, and defines 3 schemas. It is described by OpenAPI 3.2.0, at version 3.1.

Requests are made against a single base URL, https://rest.clicksend.com/v3.

5 operations 5 paths 3 schemas 2 GET2 POST1 PUT

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.2.0
API Version
3.1
Base URL
https://rest.clicksend.com/v3
Authentication
HTTP Basic
Terms of Service
Resource Areas
1

Authentication & Security 1

ClickSend SMS API declares 1 security scheme for authenticating requests. It accepts HTTP basic authentication (basicAuth). By default, every request must be authenticated.

  • basicAuth — HTTP Basic authentication using your ClickSend username and API key. The username is your ClickSend account username; the password is your API key from the Cli…

Paths & Operations 5

Across 5 paths, the API surfaces 5 operations — 2 GET, 2 POST, 1 PUT. Each is listed below with its method, path, parameters, and response codes.

SMS 5

Send and view SMS messages.

POST
/sms/send
Send one or more SMS messages.
smsSendPost body → 200
POST
/sms/price
Calculate the total price for one or more SMS messages before sending.
smsPricePost body → 200
GET
/sms/history
Get a paginated list of sent SMS messages.
smsHistoryGet 2 params → 200
PUT
/sms/{message_id}/cancel
Cancel a queued SMS message that has not yet been sent.
smsCancelPut 1 param → 200
GET
/sms/templates
Get a list of saved SMS templates.
smsTemplatesGet → 200

Schemas 3

The contract defines 3 schemas that model the data the API accepts and returns. The most detailed are SmsMessage (8 properties), ApiResponse (4 properties), SmsMessageCollection (1 property). Each schema is shown below with its type and property counts.

SmsMessage
object
8 properties 2 required
SmsMessageCollection
object
1 property 1 required
ApiResponse
object
4 properties

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

clicksend-sms-api-openapi.yml Raw ↑

Other APIs ClickSend publishes across the network.

ClickSend Account API
ClickSend Contact API
ClickSend ContactList API
ClickSend Email API
ClickSend MMS API
ClickSend Post Letter API
ClickSend Post Postcard API
ClickSend Receipts API
ClickSend Voice API
Where this information came from

This is an independent, third-party profile of ClickSend SMS API, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.

The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.

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