A diagram's schema in the curated, "schema-pure" profile: driver, schema_version, tables (each carrying its columns and indexes nested inline, in schema order), and relationships. Layout, groups, and sticky notes are omitted. For the verbatim, re-importable document use /schema-full (this response is a strict subset of it: same nesting, same field names).

Two representations. application/json is the default. Send Accept: text/markdown (or ?format=ai) for the AI Schema Format — a compact Markdown rendering built for pasting into an LLM, with ?level=simple for column names only and ?level=detailed (the default) for types and constraints.

Supports ETag conditional requests. The ETag is a hash of this payload, so a canvas-only edit (moving a table, recoloring) still returns 304 Not Modified; each representation carries its own ETag. Rate limit: 30 requests/minute per token (serialization is heavier here).

{
  "data": {
    "driver": "mysql",
    "tables": [
      {
        "indexes": [
          {
            "type": "index"
          }
        ]
      }
    ],
    "relationships": [
      {
        "type": "one-to-one"
      }
    ]
  }
}