# Explorer of Everything

> Search transactions, contracts, domains, packages, advisories, MCP servers and websites in one box. Paste anything technical — a transaction hash, a contract address, a domain, a package like npm:lodash@4.17.20, an advisory ID (GHSA/CVE), an MCP server URL or a web page. The explorer recognises what it is, runs the matching specialised explorer, and gives the entity a permanent page for people and a matching JSON endpoint for software and AI agents. Every answer carries its sources, retrieval time and schema version.

Part of usefulweb.site (https://usefulweb.site/). Results are deterministic calculations from the inputs and the listed assumptions; the API returns exactly what the web page shows.

## Use it
- Human interface: https://explore.usefulweb.site/ (interactive tool at https://explore.usefulweb.site/tool)
- JSON API: POST https://explore.usefulweb.site/api/v1/calculate with a JSON object of inputs (schema: https://explore.usefulweb.site/api/v1/tool)
- OpenAPI: https://explore.usefulweb.site/openapi.json
- MCP (Streamable HTTP): https://explore.usefulweb.site/mcp - tool `explore`

## Inputs
- query (text, required): What do you want to explore?
- chain (select): Chain (for hashes and addresses)

## Method
- Detection rules, in order: 32-byte hex → transaction; 20-byte hex → contract/address; GHSA/CVE/PYSEC/GO/RUSTSEC id → advisory; ecosystem:name@version → package; URL ending in /mcp or /sse (or host mcp.*) → MCP server; other URL → website AI readiness; bare domain → DNS + certificate.
- The matching explorer runs with its own methodology; its sources, assumptions and warnings are passed through unchanged.
- Permanent URLs: /explore/{kind}/… for people and /api/v1/… for machines are computed by the same explorer and return the identical result.