> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.pinnacle.sh/v1/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.pinnacle.sh/_mcp/server.

# v1

> One API for RCS, iMessage, MMS, and SMS. Build, test, and scale every channel — send your first message in minutes, not weeks.


## API Docs

- API Reference > Brand Registration [Get company's information](https://docs.pinnacle.sh/v1/api-reference/brand-registration/get.md)
- API Reference > Brand Registration [Register a company](https://docs.pinnacle.sh/v1/api-reference/brand-registration/register.md)
- API Reference > Brand Registration [Upsert a company](https://docs.pinnacle.sh/v1/api-reference/brand-registration/update.md)
- API Reference > Send a Message [RCS Message](https://docs.pinnacle.sh/v1/api-reference/send-a-message/rcs.md)
- API Reference > Send a Message [SMS Message](https://docs.pinnacle.sh/v1/api-reference/send-a-message/sms.md)
- API Reference > Send a Message [MMS Message](https://docs.pinnacle.sh/v1/api-reference/send-a-message/mms.md)
- API Reference [Get RCS functionality](https://docs.pinnacle.sh/v1/api-reference/get-rcs-functionality.md)
- API Reference > Tools [Shorten URL](https://docs.pinnacle.sh/v1/api-reference/tools/shorten-url.md)
- API Reference > 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)