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Substack MCP Server and API by Cotlet

dev.cotlet/substack · cotlet.dev · MCP, Website

Substack MCP server: create post, schedule post, publish Note, reply to Notes, send direct message.
Name and description as published by MCP Registry

Live

Last successful check: 9 Nov 2026, 23:28 UTC.

answered, last 24 hours
100%
answered, last 30 days
100%

At cotlet.dev, its best endpoint.

How addrbook checks →

Evidence

3 of 4 shown

  1. Answers when askedShown

    Answered a check 1 hours ago.

  2. Owner provenShown

    Control proven: cotlet.dev, proven to the MCP Registry.

  3. Track recordNot shown

    Listed for 15 days; 30 are needed.

  4. Independent paying walletsDoes not apply

    It does not sell over x402.

  5. Tool scanShown

    No hidden instructions or invisible characters in its 83 tools.

Decided by method 2026.10.2, from its recorded evidence. A check that does not apply is left out of the count.

Connect

https://cotlet.dev/mcp/v1/substackhttps://cotlet.dev/mcp/v1/substack/connecthttps://cotlet.dev/integrations/substack-api-mcp-server

MCP: addrbook sends an initialize and a tools/list. It never calls a tool. Website: addrbook loads the page.

Who's behind it

Listed by
  • MCP Registrydev.cotlet/substacklast seen UTC
Wallets named
None in its listings
Proven to belong to it
  • cotlet.devthe MCP Registry checked its publisher's namespace,
Listed since

Payments

It has no x402 endpoint, so there is no price for addrbook to read, and no source reports payments to it. How payments are read

Checks by endpoint

HostProtocolStateLast checked (UTC)Last answered (UTC)24 hours30 daysTools
cotlet.devMCPLive100%100%83changed 9 Nov 2026
cotlet.devMCPLive, sign-in required100%100%—
cotlet.devWebsiteLive100%100%—

Tool scan

addrbook read the descriptions of 83 tools at cotlet.dev on : 0 serious, 0 worth a look. It reads what the tools say about themselves; it never calls one. The recorded scan

ToolFindingWeight
cotlet_browser_downloadWhat it can do
delete_commentWhat it can do
delete_postWhat it can do
remove_commentWhat it can do
remove_subscriberWhat it can do

History

  1. Tool scan: none of the patterns checked appeared in what the server showed.https://cotlet.dev/mcp/v1/substack#4404858
  2. Tools added: substack_create_post, substack_get_post_stats, substack_list_subscribers, substack_moderate_comments, substack_publish_note, substack_reply_to_notes, substack_schedule_post, substack_send_direct_message. Tools changed: cotlet_app_guide, cotlet_apps, cotlet_browser_open, cotlet_browser_type.https://cotlet.dev/mcp/v1/substack#4404857
  3. Name changed from “Substack by Cotlet” to “Substack MCP Server and API by Cotlet”. Description changed.the MCP Registry#4380681
  4. Tool scan: none of the patterns checked appeared in what the server showed.https://cotlet.dev/mcp/v1/substack#4163080
  5. Tools added: cotlet_browser_download, cotlet_browser_evaluate, cotlet_browser_fill_form, cotlet_browser_find. Tools removed: cotlet_browser_back. Tools changed: cotlet_browser_click, cotlet_browser_close, cotlet_browser_drag, cotlet_browser_hover, cotlet_browser_navigate, cotlet_browser_open, cotlet_browser_press, cotlet_browser_read and 6 more.https://cotlet.dev/mcp/v1/substack#4163079
  6. Tools changed: cotlet_browser_back, cotlet_browser_click, cotlet_browser_drag, cotlet_browser_open, cotlet_browser_press, cotlet_browser_select, cotlet_browser_type, cotlet_report_issue and 1 more.https://cotlet.dev/mcp/v1/substack#3951479
  7. Tool scan: none of the patterns checked appeared in what the server showed.https://cotlet.dev/mcp/v1/substack#2494306
  8. Tools added: cotlet_app_guide, cotlet_browser_back, cotlet_browser_drag, cotlet_browser_hover, cotlet_browser_wait. Tools changed: cotlet_browser_click, cotlet_browser_navigate, cotlet_browser_open, cotlet_browser_press, cotlet_browser_read, cotlet_browser_screenshot, cotlet_browser_scroll, cotlet_browser_select and 4 more.https://cotlet.dev/mcp/v1/substack#2494305

Its whole history →

Is it yours?

Prove you control one of its domains or wallets and it passes the owner check. You can then reply beside the evidence and get alerts when it changes. Claim this agent

Its evidence badge, for a README or a site. It shows the same count as this page, never a verdict.

addrbook evidence badge for Substack MCP Server and API by Cotlet
[![addrbook evidence](https://api.addrbook.com/v1/agents/substack-by-cotlet-7899779a/badge.svg)](https://addrbook.com/agents/substack-by-cotlet-7899779a)