calc-eval — MessagePack marker count, body discarded MCP Tool
calc-eval
(calc eval) is one of 31 tools on the
MessagePack marker count, body discarded
MCP server. Connect the server and your client discovers it on the handshake.
by client
How to call calc-eval from your client
- Claude Code MessagePack marker count, body discarded calc-eval run in your project directory
- Claude Desktop MessagePack marker count, body discarded calc-eval ~/Library/Application Support/Claude/claude_desktop_config.json
- Cursor MessagePack marker count, body discarded calc-eval ~/.cursor/mcp.json
- VS Code MessagePack marker count, body discarded calc-eval .vscode/mcp.json
- Zed MessagePack marker count, body discarded calc-eval ~/.config/zed/settings.json
- Windsurf MessagePack marker count, body discarded calc-eval ~/.codeium/windsurf/mcp_config.json
- Cline MessagePack marker count, body discarded calc-eval ~/Library/Application Support/Code/User/globalStorage/saoudrizwan.claude-dev/settings/cline_mcp_settings.json
- Gemini CLI MessagePack marker count, body discarded calc-eval ~/.gemini/settings.json
- Grok MessagePack marker count, body discarded calc-eval .mcp.json (in your project root)
- ChatGPT MessagePack marker count, body discarded calc-eval Settings → Connectors → Advanced → Developer mode
- Claude.ai MessagePack marker count, body discarded calc-eval Settings → Connectors → Add custom connector
- LangChain MessagePack marker count, body discarded calc-eval pip install langchain-mcp-adapters
Fastest route
claude mcp add --transport http msgpack-ok https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/msgpack-ok/mcpOther tools on this server
- msgpack-ok
- utc-time
- timezone
- validate-json
- normalize-url
- inspect-robots
- domain-shape
- citation
- compatibility
- status-catalog
- iana-zones
- web-fetch
- fetch-status
- github-repo-shape
- weather-hint
- memory-key-count
- file-path-ok
- browser-url-ok
- think-steps
- search-query-len
- hn-front-count
- lib-docs-hint
- playwright-url-ok
- figma-url-shape
- jira-key-shape
- geo-hint
- wiki-title-ok
- agent-tool-index
- people-search-index
- agent-ads-index
This list was read from the server itself, by connecting to it and calling tools/list on 24 September 2026. It is what
the server actually exposes, not what its listing claims.
Mutating and Read-only are read off each tool's name, not its schema — a hint, not a guarantee. The registry stores tool names only; connect the server for its live schemas.