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SleekFlow Messaging API

Send messages, files, and internal notes; check conversation windows.

SleekFlow Messaging API is one of 7 APIs that SleekFlow publishes on the APIs.io network, described by a machine-readable OpenAPI specification.

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

This API exposes 4 operations across 4 paths, and defines 3 schemas. It is described by OpenAPI 3.2.0, at version 1.0.

Requests are made against a single base URL, https://api.sleekflow.io.

4 operations 4 paths 3 schemas 1 GET3 POST

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.2.0
API Version
1.0
Base URL
https://api.sleekflow.io
Authentication
API Key
Terms of Service
Resource Areas
1

Authentication & Security 1

SleekFlow Messaging API declares 1 security scheme for authenticating requests. An API key is passed in the header as X-Sleekflow-ApiKey (ApiKeyAuth). By default, every request must be authenticated.

  • ApiKeyAuth — Platform API key issued from the SleekFlow Integrations dashboard (Admin access required).

Paths & Operations 4

Across 4 paths, the API surfaces 4 operations — 1 GET, 3 POST. Each is listed below with its method, path, parameters, and response codes.

Messaging 4

Send messages, files, and internal notes; check conversation windows.

POST
/v1/messages
Send message
sendMessage body → 200
POST
/v1/messages/file
Send local file with message
sendFileMessage body → 200
POST
/v1/messages/note
Send internal note
sendInternalNote body → 200
GET
/v1/messages/conversation-window
Check WhatsApp Business conversation window
checkConversationWindow 1 param → 200

Schemas 3

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

Message
object
8 properties
SendMessageRequest
object
4 properties 3 required
ConversationWindow
object
3 properties

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

sleekflow-messaging-api-openapi.yml Raw ↑

Other APIs SleekFlow publishes across the network.

SleekFlow Companies API
SleekFlow Contacts API
SleekFlow Conversations API
SleekFlow Lists API
SleekFlow Staff and Teams API
SleekFlow Webhooks API
Where this information came from

This is an independent, third-party profile of SleekFlow Messaging 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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