engineering.seamless/datev-extf

DATEV EXTF

Is the DATEV EXTF MCP server down? No. It answered initialize and tools/list in the probe of 2026-10-30.

Validate and write DATEV-Format (EXTF) files locally, with findings in German and English.

alive probed 2026-11-15 · unchanged since 2026-10-30

4tools

2.7ktokens in Claude Opus 5.5

1.3 %of Claude's 200k window

1.1×the median server

313 msto initialize

22 msto list tools

Run it: npx -y @seamless-engineering/datev-extf-mcp@0.1.0 (stdio, probed in a container with the network off)
Host: npmjs.com
Reports itself as: datev-extf 0.1.0
Capabilities: prompts, resources, tools
Instructions: 400 characters
Of a 1M window: 0.3 % of a 1M context window
Count: 2.7k tokens in Claude Opus 5.5, exact, measured 2026-10-16. With the Claude Code prefix mcp__…__ on each tool name: 2.7k. The o200k_base estimate is 1.6k. Counted again when the tool definitions change. Method.
Repository: https://github.com/seamless-engineering/datev-extf-mcp
Website: https://seamless.engineering/tools/datev-extf-validator/
Registry: active, updated 2026-09-26 · registry entry

Most expensive tools

The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.69×.

Tool	≈ Claude tokens	o200k estimate	Share of this server
write_buchungsstapel	1 223	725	46 %
explain_datev_finding	832	493	31 %
validate_datev_extf	405	240	15 %
list_datev_columns	206	122	8 %

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

Servers that mention datev.

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.