The API

The whole anatomy graph over a public HTTP API — species, structures, relationships, paths, search and citations. Reads need no key, and the same surface is available to agents over MCP.

Reads are open

Listing species, fetching a structure, walking relationships and asking for a path are all anonymous. The API is same-origin with this site, so a browser call from a page here needs no CORS entry and no configuration.

Ask, rather than guess

A question endpoint takes a plain sentence and returns a plan, the facts that answer it, the structures involved and the sources behind them. When it cannot answer, it says why rather than inventing a plausible sentence.

Agents are a first-class audience

The same operations are exposed as MCP tools, so a coding agent can traverse the graph without a browser. Read-only, no per-user state, and every answer carries its citations.

Questions

Do I need a key?

Not to read. API keys are for members and cover saved views, annotations and higher rate limits.