manikanta-kops/substack

{
  "$schema": "https://agent-plugins.org/schemas/1.0.0/plugin.schema.json",
  "name": "substack",
  "version": "0.1.0",
  "description": "Connect to Substack through its official MCP server.",
  "homepage": "https://substack.com",
  "license": "Apache-2.0",
  "extensions": {
    "app.kipster": {
      "id": "substack",
      "name": "Substack",
      "category": "news-and-reading",
      "website": "https://substack.com",
      "signIn": ["dcr"],
      "needsAddress": false,
      "accountTypes": ["personal", "business"],
      "cost": "free",
      "products": [
        {
          "name": "Substack",
          "rank": 149,
          "category": "news-and-reading",
          "website": "https://substack.com",
          "accounts": "yes",
          "cost": "free",
          "signIn": "oauth-dcr",
          "research": {
            "verified": "yes",
            "checkedOn": "2026-10-09",
            "notes": "Substack's official MCP is read-only publication analytics (subscribers, post performance, revenue, retention) and works only for an admin of a Bestseller publication; it cannot read the person's reading list, Notes or profile, so readers get nothing from it. Discovery 2026-10-09: DCR yes, CIMD no, S256, token auth none or client_secret_basic, authorization server substack.com, scopes mcp:read and mcp.user.read.",
            "sources": [
              "https://support.substack.com/api/v2/help_center/en-us/articles/50834026608916.json",
              "https://mcp.substack.com/.well-known/oauth-protected-resource/api/v1/mcp",
              "https://substack.com/.well-known/oauth-authorization-server"
            ]
          }
        }
      ],
      "tools": {},
      "probe": {
        "result": "ok",
        "signIn": ["dcr"],
        "checkedOn": "2026-10-13",
        "reason": "HTTP 401, sign-in methods and S256 PKCE confirmed; no account tested"
      },
      "verification": "probe"
    }
  }
}