> For clean Markdown of any page, append .md to the page URL. > For a complete documentation index, see https://docs.pinnacle.sh/v1/api-reference/tools/llms.txt. > For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.pinnacle.sh/_mcp/server. # Tools > One API for RCS, iMessage, MMS, and SMS. Build, test, and scale every channel — send your first message in minutes, not weeks. ## API Docs - Tools [Shorten URL](https://docs.pinnacle.sh/v1/api-reference/tools/shorten-url.md) - Tools [Create Upload URL](https://docs.pinnacle.sh/v1/api-reference/tools/upload-url.md) ## OpenAPI Specification The raw OpenAPI 3.1 specification for this API is available at: - [OpenAPI JSON](https://docs.pinnacle.sh/openapi.json) - [OpenAPI YAML](https://docs.pinnacle.sh/openapi.yaml)