io.github.marcomoauro/substack-mcp
Substack MCP Server
Manage Substack publishing, subscribers, analytics, reader feeds, comments, and images through MCP.
alive probed 2026-10-15
27tools
23ktokens in Claude Opus 5.5
24ktokens in Claude Code
11.6 %of a 200k context window
14ko200k_base estimate
428 msto initialize
23 msto list tools
- Run it
- npx -y substack-mcp@1.3.2 (stdio, probed in a container with the network off)
- Host
- npmjs.com
- Reports itself as
- Substack MCP 1.3.2
- Capabilities
- tools
- Instructions
- none
- Claude count
- Claude Opus 5.5, measured 2026-10-15. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/marcomoauro/substack-mcp
- Website
- https://implementing.substack.com/p/mcp-server-for-substack
- Registry
- active, updated 2026-09-03 · registry entry
- Reachable
- 1 of the last 1 probe
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| set_post_body | 4 901 | 36 % |
| list_subscribers | 1 759 | 13 % |
| export_subscribers | 1 369 | 10 % |
| update_draft | 660 | 5 % |
| get_analytics | 603 | 4 % |
Badge and feed
[](https://mcpcost.ulehla.dev/s/io.github.marcomoauro/substack-mcp)
An entry for every probe that changed the result, the tool count or the token cost: Atom feed. Add it to a feed reader or a Slack RSS app to hear when the server stops answering or its tool set grows.