Side-by-Side Model Context Protocol Comparison
Substack MCP vs Bluesky Social MCP
In-depth architectural comparison of the Substack MCP and Bluesky Social MCP MCP servers. Compare execution transports, security boundaries, tool capabilities, quality scores, and ready-to-paste client installation snippets for Claude, Cursor, Windsurf, and VS Code.
At a Glance & Executive Verdict
Substack MCP
Social Media · Local stdio
Quality: 68/100 (Great) | Auth: other
Bluesky Social MCP
Social Media · Local stdio
Quality: 51/100 (Good) | Auth: API Key required
Verdict Summary: Choose Substack MCP if you need specialized Social Media tools running via a local process. Choose Bluesky Social MCP if your workspace requires Social Media integration with local subprocess execution. Both servers can be configured concurrently in your client's
mcpServers manifest.Which MCP Server Should You Choose?
Choose Substack MCP when:
- You need dedicated capabilities in the Social Media domain.
- You prefer local stdio subprocess transport architecture.
- Your security boundary fits: other (Free / Open Source).
- You have access to required keys:
SUBSTACK_PUBLICATION_URL, SUBSTACK_SESSION_TOKEN, SUBSTACK_USER_ID, SUBSTACK_MCP_HOME. - Primary tools included: get_subscriber_count, list_published_posts, list_drafts.
Choose Bluesky Social MCP when:
- You need dedicated capabilities in the Social Media domain.
- You prefer local stdio subprocess transport architecture.
- Your security boundary fits: API Key required (Free / Open Source).
- You have access to required keys:
BLUESKY_IDENTIFIER, BLUESKY_APP_PASSWORD.
Feature & Specification Comparison
Tools & Capabilities Breakdown
Substack MCP Tools (14)
get_subscriber_count
Get the current subscriber count for your Substack publication. Returns `precision`: 'exact' when the API reports a true count, 'approximate' when only Substack's rounded value is available (the real number is that or higher — render it hedged, e.g. '1,000+'), or 'unavailable' with count -1. Never treat an approximate value as exact.
list_published_posts
List published posts with pagination. Returns title, date, slug, and URL for each post.
list_drafts
List draft posts. Returns title, creation date, and audience for each draft.
get_post
Get the full content of a published post by ID. Returns title, body HTML, metadata.
get_draft
Get the full content of a draft post by ID. Returns title, body, metadata.
Ready-to-Paste Client Configurations
Paste either (or both) of these JSON server blocks into your client config file (e.g. claude_desktop_config.json or ~/.cursor/mcp.json).
Substack MCP Configuration
Bluesky Social MCP Configuration