0n3
MCP servers · Substack · MCP server + skill

Connect Claude Code to Substack

One line gives Claude Code your Substack account as tools: 3 endpoints, read posts, search posts, called with your own connection. No key in the prompt, a receipt for every call, revoke Claude Code's access alone any time.

Get the line for Claude CodeConnect Substack first

Three steps

  1. Create a free 0n3 account and connect Substack. Paste a key or sign in; it lands in your vault, encrypted.
  2. Install 0n3 into Claude Code. The terminal agent. One command, then every connection you hold is a tool in your shell. The skill file teaches it how 0n3 works.
  3. Ask Claude Code: whoami. Then: "List posts in Substack".
Install (user scope — every project)
claude mcp add --transport http --scope user 0n3 https://0n3.app/mcp --header "Authorization: Bearer <your 0n token>"

The line above carries a placeholder; 0n3.app/install mints a real key named for Claude Code and fills it in.

What Claude Code can then do in Substack

Read posts · List a publication's posts (archive) and fetch a single post by slug2
List postsGET /archive
Get a postGET /posts/{slug}
Search posts · Search posts within a publication1
Search postsGET /post/search

Substack in other AI clients

Claude (desktop & claude.ai) + SubstackconnectorChatGPT + Substackconnector · GPT actionCodex CLI + SubstackMCP serverGemini CLI + SubstackMCP serverCursor + SubstackMCP serverVS Code (Copilot) + SubstackMCP serverWindsurf + SubstackMCP server

Claude Code with other apps

Hostinger363 endpointsTelegram132 endpointsPipedrive95 endpointsResend67 endpointsSquare57 endpointsLinkedIn50 endpointsSlack45 endpointsFigma32 endpointsCloudConvert32 endpointseBay25 endpointsQuickBooks21 endpointsCloudflare21 endpoints