SESender works with Claude, Grok, the OpenAI API, the xAI API, and Gemini CLI / Gemini API through one MCP connector at https://sesender.com/api/v1/mcp. In Claude, add the connector URL and set authentication to No sign-in, then send your SESender API key in the x-api-key header. On grok.com, open Connectors, then New Connector, then Custom, and provide the same URL and your API key.
For the OpenAI API, add a remote MCP tool on the Responses API and send the key in the headers. For the xAI API, add a remote MCP tool with the same URL and send the key in the x-api-key header. That is separate from the grok.com connector. For Gemini CLI only, run gemini mcp add --transport http https://sesender.com/api/v1/mcp -H 'x-api-key: YOUR_KEY'.
For the Gemini API, use the google-genai SDK: open an MCP streamable-HTTP session with the x-api-key header and pass it in tools. The ChatGPT app and the Gemini app at gemini.google.com are not yet supported. Both only support OAuth. Include the flowforge:operate scope when the connector should take live actions. Live actions require confirm. Works with describes compatibility. It does not mean the assistant company endorses SESender.
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