post_v1_books_ask

AskBooks answers a plain-language question about the caller's own books — "what is my MRR?", "how long is my runway?" — with figures taken from their ledger, never a guessed number. A deterministic keyword router picks the intent and reads the real metrics, and those figures, followups and report sources are computed BEFORE any model call and are never altered by one: the optional narration seam only rephrases the sentence, and it degrades silently to the templated answer when no AI plane is wired. It is strictly read-only — it restates the books, it never posts to them.

Arguments

tools/list declares a type and a description for each field and nothing further. A — means neither the door nor that operation constrains the field.

Call it

A tools/call carries every argument in one flat object — nothing binds to a path or a query string. Nothing above is required, so every declared argument is shown rather than a guess at which matter.

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": "post_v1_books_ask",
         "arguments": {
           "from": "<from>",
           "question": "<question>",
           "to": "<to>"
         }
       }
     }'

Values are the operation's own defaults and enumerated values where it declares them, and a <placeholder> where neither source declares one. 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 books API reference, on https://api.hanzo.ai.

All 755 tools · The door · API reference

Generated from tools/list on https://api.hanzo.ai/v1/mcp — 833 tools captured 2026-08-01, of which 755 are documented here (the operator surface is not published) (this build read the vendored copy; the door was unreachable).