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The Posting Substack API

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Substack does not provide a native public API for publishing posts. But authors who want to draft, publish, and schedule from AI agents (Cursor, Claude, and other MCP hosts) still need a way out. This is the MCP server to publish to Substack via any agent.

HN · launched Jul 28, 2026 · 6 upvotes (top 71%) · 0 views

Niche: model context protocol tools · 465 launches, 13 in the last 7 days ▼ -24% · Explore this niche →

Category and tags
  • Media & entertainment
  • Dev tools
  • Developer
  • Not AI
  • Hobby / open-source project

Visit website ↗ Source listing ↗

More like this: all 465 launches in model context protocol tools →

Could you build this?

Yes Reverse-engineering Substack's internal endpoints with session cookies to build an MCP server wrapper is a basic API scraping and tooling task.

Discussion

No comments on this launch.

Competitors

Other products that read as similar to this one : 99 launches clear the similarity bar, closest 8 shown.

Attention rank: #92 of 100 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).

Launched 174 days after the earliest competitor.

  • PostNitro for Agents · ph · 2026-10-13 · 122 upvotes · similarity 0.51
  • API to MCP · ph · 2026-06-19 · 195 upvotes · similarity 0.46
  • PostPublish Pro · ph · 2026-10-09 · 2 upvotes · similarity 0.46
  • Blogizi · ph · 2026-10-07 · 2 upvotes · similarity 0.44
  • blotato-dev.github.io · github · 2026-09-21 · 10 upvotes · similarity 0.43
  • PostSider · ph · 2026-09-21 · 84 upvotes · similarity 0.43
  • Socialync · ph · 2026-09-15 · 2 upvotes · similarity 0.42
  • NitroStack · ph · 2026-10-17 · 300 upvotes · similarity 0.42

Related data

The niche, labels, vibe code rating and competitor comparison on this page are analysis by Nicheloom. If you use them, please credit nicheloom.com. How you may use our data.