co.truncus/mcp-server

truncus-email

Is the co.truncus/mcp-server MCP server down? No. It answered initialize and tools/list in the probe of 2026-10-31.

Send transactional emails from AI agents via Truncus. Validate, track delivery, and manage domains.

alive probed 2026-11-14 · unchanged since 2026-10-31

6tools

820tokens in Claude Opus 5.5

0.4 %of Claude's 200k window

0.3×the median server

347 msto initialize

6 msto list tools

Run it: npx -y @truncus/mcp-server@0.1.1 (stdio, probed in a container with the network off)
Host: npmjs.com
Reports itself as: truncus-email 0.1.0
Capabilities: tools
Instructions: none
Of a 1M window: <0.1 % of a 1M context window
Count: 820 tokens in Claude Opus 5.5, exact, measured 2026-10-17. With the Claude Code prefix mcp__…__ on each tool name: 880. The o200k_base estimate is 460. Counted again when the tool definitions change. Method.
Repository: https://github.com/vanmoose/truncus-mcp-server
Registry: active, updated 2026-03-05 · registry entry

Most expensive tools

The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.78×.

Tool	≈ Claude tokens	o200k estimate	Share of this server
truncus_send_email	230	129	28 %
truncus_validate_email	189	106	23 %
truncus_get_stats	143	80	17 %
truncus_get_email	109	61	13 %
truncus_check_suppression	93	52	11 %

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

Servers that mention truncus or transactional or delivery.

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.