Substack MCP Server
by thenewrhythm
Server Configuration
Describes the environment variables required to run the server.
| Name | Required | Description | Default |
|---|---|---|---|
| SUBSTACK_SID | No | Your Substack session cookie (substack.sid) from browser. Required for write tools (create_draft, create_note, etc.). Optional for read-only. | |
| SUBSTACK_PUBLICATION | Yes | Your Substack publication subdomain (e.g., 'mynewsletter'). Required for all operations. |
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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MCP directory API
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