io.github.daedalus/mcp-cryptography

mcp-cryptography

Is the io.github.daedalus/mcp-cryptography MCP server down? No. It answered initialize and tools/list in the probe of 2026-11-14.

MCP server exposing cryptography library functionality

alive probed 2026-11-14

22tools

3.2ktokens in Claude Opus 5.5

1.6 %of Claude's 200k window

1.3×the median server

9.2 sto initialize

746 msto list tools

Run it: uvx mcp-cryptography@0.1.1 (stdio, probed in a container with the network off)
Host: pypi.org
Reports itself as: mcp-cryptography 4.2.0
Capabilities: logging, prompts, resources, tools
Instructions: none
Of a 1M window: 0.3 % of a 1M context window
Count: 3.2k tokens in Claude Opus 5.5, exact, measured 2026-10-17. With the Claude Code prefix mcp__…__ on each tool name: 3.5k. The o200k_base estimate is 1.7k. Counted again when the tool definitions change. Method.
Repository: https://github.com/daedalus/mcp-cryptography
Registry: active, updated 2026-04-09 · registry entry

Most expensive tools

The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.95×.

Tool	≈ Claude tokens	o200k estimate	Share of this server
pbkdf2_derive	230	118	7 %
generate_self_signed_cert	218	112	7 %
aes_decrypt	216	111	7 %
hmac_verify	216	111	7 %
aes_encrypt	199	102	6 %

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

Servers that mention cryptography.

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.