put_v1_flags_defs_key

PutFlagDefinition creates or replaces the flag definition at the path's key and returns the stored row. The BODY IS THE DEFINITION DOCUMENT — the PostHog-shaped JSON object the evaluator consumes — and it is stored verbatim except that its "key" is forced to the key in the URL, so a document can never be filed under a name other than the one it was addressed by. Every write bumps the version and appends to the change log under the caller's identity.

Arguments

This tool declares no arguments. Call it with an empty arguments object.

Call it

A tools/call carries its arguments in one flat object. This tool declares none, so the object is empty.

curl -X POST https://api.hanzo.ai/v1/mcp \
  -H "Authorization: Bearer $HANZO_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
       "jsonrpc": "2.0",
       "id": 1,
       "method": "tools/call",
       "params": {
         "name": "put_v1_flags_defs_key",
         "arguments": {}
       }
     }'

tools/list needs no credential; tools/call does — called without one the door answers HTTP 200 with a JSON-RPC result whose isError is set and whose text says what was missing. How to get a key →

The operation behind it

The same capability over plain HTTP is in the flags API reference, on https://api.hanzo.ai.

All 834 tools · The door · API reference

Generated from tools/list on https://api.hanzo.ai/v1/mcp — 834 tools captured 2026-08-01 (this build read the vendored copy; the door was unreachable).