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Kudosity RCS API

The RCS API from Kudosity — 3 operation(s) for rcs.

Kudosity RCS API is one of 12 APIs that Kudosity publishes on the APIs.io network, described by a machine-readable OpenAPI specification.

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

This API exposes 4 operations across 3 paths, and defines 28 schemas. It is described by OpenAPI 3.2.0, at version 20250101.

Requests are made against a single base URL, https://api.transmitmessage.com.

4 operations 3 paths 28 schemas 2 GET2 POST

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.2.0
API Version
20250101
Base URL
https://api.transmitmessage.com
Authentication
API Key
Resource Areas
1

Authentication & Security 1

Kudosity RCS API declares 1 security scheme for authenticating requests. An API key is passed in the header as x-api-key (ApiKeyAuth). By default, every request must be authenticated.

  • ApiKeyAuth — All API requests require your API credentials, you will find them once logged into your account on the SETTINGS page. Scroll down to API Settings to find your…

Paths & Operations 4

Across 3 paths, the API surfaces 4 operations — 2 GET, 2 POST. Each is listed below with its method, path, parameters, and response codes.

RCS 4
GET
/v2/rcs/messages
List RCS messages
6 params → 200400401500
POST
/v2/rcs/messages
Send RCS message
body → 200400401500
POST
/v2/rcs/capabilities
Check RCS capability for phone numbers
body → 200400401403429500
GET
/v2/rcs/messages/{id}
Get RCS message
1 param → 200401404500

Schemas 28

The contract defines 28 schemas that model the data the API accepts and returns. The most detailed are RcsGetResponse (11 properties), RcsResponse (8 properties), RcsListMessageItem (8 properties), RcsRequest (6 properties). Each schema is shown below with its type and property counts.

RcsContentType
string
Type of the message content.
CommonErrorResponse
ProblemDetails
object
A Problem Details object (RFC 9457). Additional properties specific to the problem type may be present.
4 properties 4 required
Uri
string
string providing an URI formatted according to IETF RFC 3986.
RcsRequest
object
6 properties 4 required
RcsListMessagesData
object
Container for the list of RCS messages.
1 property 1 required
RcsListMessageItem
object
Summary representation of an RCS message for list responses.
8 properties 7 required
RcsResponse
object
8 properties 6 required
TooManyRequestsProblem
object
HTTP 429 Too Many Requests - Rate limit exceeded. Your client application has sent too many requests in a given amount of time and should retry later.
RCSTextContent
object
1 property 1 required
RcsListMessagesMeta
object
Metadata for the list messages response including pagination details.
1 property 1 required
ForbiddenProblem
object
HTTP 403 Forbidden - Access to the requested resource is forbidden. Your client application is authenticated but does not have permission to access this resour…
RCSText
object
Text content for the message.
1 property 1 required
RcsCapabilityCheckData
object
Capability check results for the requested phone numbers.
1 property 1 required
InternalServerErrorProblem
object
This problem occurs when the server encounters an unexpected condition that prevents it from fulfilling the request. Your client application did everything cor…
RcsCapabilityResult
object
RCS capability result for a single phone number.
2 properties 2 required
InputValidationProblem
object
This problem occurs when the request is deemed unprocessable. Your client issued a request that failed validation. Certain validation libraries return multi-er…
RCSMessageEvent
object
Lifecycle event for an RCS message.
3 properties 3 required
InputValidationIssue
object
An issue detected during input validation.
3 properties
CommonResponseMeta
object
2 properties
UnauthorizedProblem
object
HTTP 401 Unauthorized - API authentication failed. The request was rejected because the API key is missing, invalid, expired, or lacks sufficient permissions f…
RcsMessageStatus
string
Current status of an RCS message.
RcsCapabilityCheckRequest
object
Request payload for the synchronous RCS capability check.
2 properties 2 required
PaginationMeta
object
Pagination metadata for cursor-based pagination. Reusable across all paginated API endpoints.
5 properties 3 required
RCSSMSFallback
object
Provides intelligent fallback for non-RCS capable devices and carrier delivery issues. If the RCS message fails, the SMS will send the configured message to th…
2 properties 1 required
NotFoundProblem
object
This problem occurs when the requested resource could not be found. Your client application tried to access a resource that does not exist (or could not be fou…
RcsGetResponse
object
11 properties 8 required
CommonSuccessResponse

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

kudosity-rcs-api-openapi.yml Raw ↑

Other APIs Kudosity publishes across the network.

Kudosity Account API
Kudosity Contacts & Lists API
Kudosity Email SMS API
Kudosity Keywords API
Kudosity MMS API
Kudosity Numbers API
Kudosity Reporting API
Kudosity Senders API
Kudosity SMS API
Kudosity Webhook API
Kudosity Whats App API
Where this information came from

This is an independent, third-party profile of Kudosity RCS 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.

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