Sendmux Email Inbox API + Sending
Officialby Sendmux
Server Configuration
Describes the environment variables required to run the server.
| Name | Required | Description | Default |
|---|---|---|---|
| SENDMUX_API_KEY | No | Fallback API key for single-key setups; smx_mbx_* or smx_root_* | |
| SENDMUX_MCP_HOST | No | HTTP host | 127.0.0.1 |
| SENDMUX_MCP_PATH | No | HTTP path | /mcp |
| SENDMUX_MCP_PORT | No | HTTP port | 8765 |
| OPENAPI_INPUT_DIR | No | Alternative OpenAPI input directory | |
| SENDMUX_APP_BASE_URL | No | App API base URL | https://app.sendmux.ai/api/v1 |
| SENDMUX_MCP_SURFACES | No | Comma-separated list of surfaces (mailbox, management, sending) for combined server | |
| SENDMUX_MCP_TRANSPORT | No | Transport (stdio, http, streamable-http) | stdio |
| SENDMUX_MAILBOX_API_KEY | No | Mailbox API key (smx_mbx_*), required when mailbox surface is selected | |
| SENDMUX_MCP_APP_OPENAPI | No | Override app OpenAPI snapshot path or URL | |
| SENDMUX_SENDING_API_KEY | No | Sending API key (smx_mbx_*), required when sending surface is selected | |
| SENDMUX_SENDING_BASE_URL | No | Sending API base URL | https://smtp.sendmux.ai/api/v1 |
| SENDMUX_MANAGEMENT_API_KEY | No | Management API key (smx_root_*), required when management surface is selected | |
| SENDMUX_MCP_ALLOWED_ORIGINS | No | Allowed browser origins (comma-separated) | |
| SENDMUX_MCP_SENDING_OPENAPI | No | Override sending OpenAPI snapshot path or URL | |
| SENDMUX_MCP_TIMEOUT_SECONDS | No | Request timeout in seconds | 30 |
| SENDMUX_MCP_HTTP_BEARER_TOKEN | No | Bearer token for HTTP transport (required unless SENDMUX_MCP_ALLOW_UNAUTHENTICATED_HTTP is true) | |
| SENDMUX_MCP_OPENAPI_INPUT_DIR | No | Override OpenAPI input directory | |
| SENDMUX_MCP_RETRY_MAX_ATTEMPTS | No | Maximum retry attempts | 3 |
| SENDMUX_MCP_ALLOW_UNAUTHENTICATED_HTTP | No | Allow unauthenticated HTTP connections | false |
Capabilities
Server capabilities have not been inspected yet.
Tools
Functions exposed to the LLM to take actions
| Name | Description |
|---|---|
No tools | |
Prompts
Interactive templates invoked by user choice
| Name | Description |
|---|---|
No prompts | |
Resources
Contextual data attached and managed by the client
| Name | Description |
|---|---|
No resources | |
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