# Explorer of Everything > A network of 1 focused, deterministic tools. Every tool has a human page, a JSON API, an OpenAPI description and an MCP tool that all return the same result (inputs, result, units, assumptions, sources, timestamps). ## Machine interfaces - Tool catalog (JSON): https://explorer.usefulweb.site/api/v1/tools - OpenAPI (all tools): https://explorer.usefulweb.site/openapi.json - MCP server (all tools + workflows): https://explorer.usefulweb.site/mcp - Pick a tool for a natural-language request: POST https://explorer.usefulweb.site/api/v1/tools/prompt-to-tool-router/calculate {"request": "..."} ## Tools - [Explorer of Everything](https://explore.usefulweb.site/): Search transactions, contracts, domains, packages, advisories, MCP servers and websites in one box. API: POST https://explorer.usefulweb.site/api/v1/tools/explore/calculate ## Workflows