Developer resources

API reference

The Salesmsg Public API. v2.2 is current with 500+ endpoints. All responses return JSON.

API overview

What the Salesmsg API does and what you can build with it.

Implementation guide

Authentication methods, scopes, and how to start making API calls.

Guides and code examples

Step-by-step walkthroughs for common tasks using Swagger and Postman.

Swagger UI

Interactive reference for every endpoint. Try requests in the browser.

Postman Collection

Import every endpoint into Postman with one click.

Authentication

Two supported methods. Each supports granular :read and :write scopes per resource — request only the scopes your integration needs.

Personal Access Tokens (PAT) — for single-account integrations, scripts, and internal automation. Tied to a user account. Good for development and automation when an app only needs to manage one Salesmsg account.

OAuth 2.0 — for apps that authenticate other Salesmsg users on their behalf and use the issued token to access Salesmsg's functionality.

OAuth 2.0 flow walkthrough

Step-by-step OAuth 2.0 setup with real endpoints and token refresh.

PAT setup and refresh

How to generate a Personal Access Token and refresh it.

Build an integration

For partners and ISVs shipping a Salesmsg integration.

OAuth 2.0 flow

Register your app, request authorization, and refresh tokens.

API call examples

Working code examples for common integration patterns.

Salesmsg Partner Program

Co-selling, listing, and revenue share for tech partners.

MCP Server for AI agents

Connect your Salesmsg account to Claude or any MCP-compatible AI agent.

MCP Server overview

What MCP can do, supported clients, install instructions, and limits.

ContactMCP on GitHub

Source code and configuration.

Limits and operations

Operational details, constraints, and compliance requirements for the Salesmsg API.

Help and support

When you need a real person or updates.

Help Center: API

Articles, walkthroughs, and how-to guides.

Changelog

Versions, releases, and breaking change notices.

Contact support at support@salesmessage.com