io.github.mrfentmen/mailchimp-mcp

mailchimp-mcp

Is the io.github.mrfentmen/mailchimp-mcp MCP server down? No. It answered initialize and tools/list in the probe of 2026-10-29.

Query Mailchimp: ping, lists, members, campaigns.

alive probed 2026-11-14 · unchanged since 2026-10-29

10tools

1.2ktokens in Claude Opus 5.5

0.6 %of Claude's 200k window

0.5×the median server

281 msto initialize

10 msto list tools

Run it: npx -y @mrfentmen/mailchimp-mcp@1.1.0 (stdio, probed in a container with the network off)
Host: npmjs.com
Reports itself as: mailchimp-mcp 1.0.0
Capabilities: tools
Instructions: none
Of a 1M window: 0.1 % of a 1M context window
Count: 1.2k tokens in Claude Opus 5.5, exact, measured 2026-10-29. With the Claude Code prefix mcp__…__ on each tool name: 1.3k. The o200k_base estimate is 627. Counted again when the tool definitions change. Method.
Repository: https://github.com/mrfentmen/premium-mcps
Registry: active, updated 2026-10-17 · registry entry

Most expensive tools

The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.89×.

Tool	≈ Claude tokens	o200k estimate	Share of this server
list_members	164	87	14 %
member_details	142	75	12 %
list_campaigns	127	67	11 %
list_lists	125	66	11 %
campaign_report	119	63	10 %

Other registry entries on npmjs.com, the ones next to this name; all of them.

Servers that mention mailchimp.

The result of the latest probe, the tool count and the token cost. The feed has an entry for every probe that changed them.

Stops answering, comes back, tool set or cost changes. One confirmation mail first, a stop link in every mail.