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8 clients · secrets stay placeholders

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{
  "mcpServers": {
    "substack-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@conorbronsdon/[email protected]"
      ],
      "env": {
        "SUBSTACK_PUBLICATION_URL": "${SUBSTACK_PUBLICATION_URL}",
        "SUBSTACK_SESSION_TOKEN": "${SUBSTACK_SESSION_TOKEN}",
        "SUBSTACK_USER_ID": "${SUBSTACK_USER_ID}"
      }
    }
  }
}

claude mcp add substack-mcp -e "SUBSTACK_PUBLICATION_URL=${SUBSTACK_PUBLICATION_URL}" -e "SUBSTACK_SESSION_TOKEN=${SUBSTACK_SESSION_TOKEN}" -e "SUBSTACK_USER_ID=${SUBSTACK_USER_ID}" -- npx -y @conorbronsdon/[email protected]

[mcp_servers.substack-mcp]
command = "npx"
args = ["-y", "@conorbronsdon/[email protected]"]
env = { "SUBSTACK_PUBLICATION_URL" = "${SUBSTACK_PUBLICATION_URL}", "SUBSTACK_SESSION_TOKEN" = "${SUBSTACK_SESSION_TOKEN}", "SUBSTACK_USER_ID" = "${SUBSTACK_USER_ID}" }

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "substack-mcp": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "@conorbronsdon/[email protected]"
      ],
      "enabled": true,
      "environment": {
        "SUBSTACK_PUBLICATION_URL": "{env:SUBSTACK_PUBLICATION_URL}",
        "SUBSTACK_SESSION_TOKEN": "{env:SUBSTACK_SESSION_TOKEN}",
        "SUBSTACK_USER_ID": "{env:SUBSTACK_USER_ID}"
      }
    }
  }
}

{
  "mcpServers": {
    "substack-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@conorbronsdon/[email protected]"
      ],
      "env": {
        "SUBSTACK_PUBLICATION_URL": "${SUBSTACK_PUBLICATION_URL}",
        "SUBSTACK_SESSION_TOKEN": "${SUBSTACK_SESSION_TOKEN}",
        "SUBSTACK_USER_ID": "${SUBSTACK_USER_ID}"
      }
    }
  },
  "deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=substack-mcp&config=eyJjb21tYW5kIjoibnB4IiwiYXJncyI6WyIteSIsIkBjb25vcmJyb25zZG9uL3N1YnN0YWNrLW1jcEAxLjMuMCJdLCJlbnYiOnsiU1VCU1RBQ0tfUFVCTElDQVRJT05fVVJMIjoiJHtTVUJTVEFDS19QVUJMSUNBVElPTl9VUkx9IiwiU1VCU1RBQ0tfU0VTU0lPTl9UT0tFTiI6IiR7U1VCU1RBQ0tfU0VTU0lPTl9UT0tFTn0iLCJTVUJTVEFDS19VU0VSX0lEIjoiJHtTVUJTVEFDS19VU0VSX0lEfSJ9fQ%3D%3D"
}

{
  "servers": {
    "substack-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@conorbronsdon/[email protected]"
      ],
      "env": {
        "SUBSTACK_PUBLICATION_URL": "${SUBSTACK_PUBLICATION_URL}",
        "SUBSTACK_SESSION_TOKEN": "${SUBSTACK_SESSION_TOKEN}",
        "SUBSTACK_USER_ID": "${SUBSTACK_USER_ID}"
      }
    }
  }
}

{
  "mcpServers": {
    "substack-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@conorbronsdon/[email protected]"
      ],
      "env": {
        "SUBSTACK_PUBLICATION_URL": "${SUBSTACK_PUBLICATION_URL}",
        "SUBSTACK_SESSION_TOKEN": "${SUBSTACK_SESSION_TOKEN}",
        "SUBSTACK_USER_ID": "${SUBSTACK_USER_ID}"
      }
    }
  }
}

extensions:
  "substack-mcp":
    enabled: true
    name: "substack-mcp"
    type: stdio
    cmd: "npx"
    args:
      - "-y"
      - "@conorbronsdon/[email protected]"
    envs:
      "SUBSTACK_PUBLICATION_URL": "${SUBSTACK_PUBLICATION_URL}"
      "SUBSTACK_SESSION_TOKEN": "${SUBSTACK_SESSION_TOKEN}"
      "SUBSTACK_USER_ID": "${SUBSTACK_USER_ID}"
    timeout: 300

Placeholders to fill from your own secret store: ${SUBSTACK_SESSION_TOKEN}. The registry never accepts secret values.

This is a local package: the command runs on your machine.

Quality – / 100not scored

Not scored: fewer than three checks apply, usually because no remote answered a credential-free probe or the server is a local package.

protocoln/a · weight 25

n/a
protocol.modern, protocol.stateless, protocol.transport, protocol.list_ttlno remote answered a protocol handshake (not probed yet, unreachable, or local-only)

authorizationn/a · weight 15

n/a
auth.prm, auth.as_metadata, auth.cimdno remote uses OAuth
n/a
auth.secret_in_urlno templated URL

tool hygienen/a · weight 30

n/a
tools.descriptions, tools.description_length, tools.schemas, tools.annotations, tools.directory_hints, tools.token_cost, tools.api_dumptool list unknown (behind auth, not probed, or empty)

stabilityn/a · weight 15

n/a
stability.changes, stability.rug_pulltool list unknown

dependencies67 · weight 15

pass
deps.known_vulnsno known advisory in 154 resolved packages
fail
deps.mcp_sdk_version@modelcontextprotocol/sdk 1.30.1 has 1 known advisory (GHSA-6qxp-vccf-f47h); update @modelcontextprotocol/sdk to 1.31.0 or later
pass
deps.resolvable@conorbronsdon/[email protected] resolved: 154 packages

Tool list unknown · checked 2026-10-20 04:09 UTC

Tool changes

No tool definition changes recorded. A server's first observation is its baseline; later probes record what changes.

Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed. How it is computed.

Trust 96 / 100

provenance90

livenessn/a

freshness100

hygiene100

+repository +namespace-matches-repo +website ~liveness-unmeasured +updated-26d-ago

Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed. How it is computed.

Dependencies

@conorbronsdon/[email protected] npm153 dependencies, resolved · MCP SDK @modelcontextprotocol/sdk 1.30.1 · advisories checked 2026-10-19

advisory	severity	package	fixed in
GHSA-6qxp-vccf-f47hMCP TypeScript SDK: OAuth client could send credentials to an authorization server chosen by the MCP server	high	`@modelcontextprotocol/[email protected]`MCP SDK, direct	fixed in `1.31.0`

Dependency graphs from deps.dev; advisories from OSV.dev, including the GitHub Advisory Database and the PyPI Advisory Database; all CC BY 4.0. The graph is what a clean install of this version resolves today; nothing was installed or run. How it is checked.

Endpoints

package	registry	version	runtime	secrets
`@conorbronsdon/substack-mcp`	npm	1.3.0	npx	`SUBSTACK_SESSION_TOKEN`

Tools (0)

No tools observed. Local packages are never executed by the registry.

Schemas: list_tools.

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Official server.json

{
  "name": "io.github.conorbronsdon/substack-mcp",
  "title": "Substack MCP Server",
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "version": "1.3.0",
  "packages": [
    {
      "version": "1.3.0",
      "transport": {
        "type": "stdio"
      },
      "identifier": "@conorbronsdon/substack-mcp",
      "runtimeHint": "npx",
      "registryType": "npm",
      "environmentVariables": [
        {
          "name": "SUBSTACK_PUBLICATION_URL",
          "isRequired": true,
          "description": "Your Substack publication URL (e.g., https://yourblog.substack.com)",
          "placeholder": "https://yourblog.substack.com"
        },
        {
          "name": "SUBSTACK_SESSION_TOKEN",
          "isSecret": true,
          "isRequired": true,
          "description": "connect.sid cookie value from your Substack session"
        },
        {
          "name": "SUBSTACK_USER_ID",
          "isRequired": true,
          "description": "Your Substack user ID",
          "placeholder": "12345"
        }
      ]
    }
  ],
  "repository": {
    "url": "https://github.com/conorbronsdon/substack-mcp",
    "source": "github"
  },
  "websiteUrl": "https://github.com/conorbronsdon/substack-mcp#readme",
  "description": "Substack drafts, Notes, analytics and consented subscribers. Long-form posts stay draft-only."
}