Documentation
Everything you need to send an SMS.
Guide, full API Reference and an MCP server for AI agents – pick a section and get started.
SMS API
Step-by-step guide: sending SMS, bulk sending, error codes, webhooks and 3CX – with examples in 5 languages.
OpenAPI Reference
Full, interactive reference generated from OpenAPI: endpoints, field schemas, response codes and webhooks.
OpenMCP Server
Send SMS straight from AI agents (Claude Code, Codex CLI, Gemini CLI) via the SENDLY MCP server.
OpenStart sending SMS today.
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