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Posts a reviewed scanned bill to the ledger.

POST /v1/books/scan/book

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Address	`https://api.hanzo.ai/v1/books/scan/book`
Method	`POST`
Operation	`post_books_scan_book`
Auth	`Authorization: Bearer $HANZO_API_KEY`

Posts a reviewed scanned bill to the ledger. It is the scanner's ONLY write: the voucher goes through the same post() choke point every other source uses, so it is checked to balance (Σdebit == Σcredit) and is idempotent by (scan, scanId) — re-booking the same scan answers posted=false and writes nothing. A bill whose economic identity (vendor, total, issue date) already posted under a DIFFERENT scan is refused 409 unless override is set, which is what stops the same receipt re-scanned into a new file hash from double-booking. An unbalanced voucher is refused 400.

Request

11 fields, body application/json (required).

Field	In	Type	Required	Description
`override`	body	boolean	—	Override books this bill even when one of the SAME economic identity (vendor, total, issue date) already posted — the explicit human confirmation that a same-looking bill is a genuine second spend, not the same receipt re-scanned.
`scanId`	body	string	—	ScanID is the scanned document's file hash, as GET /v1/books/inbox and the scan draft report it.
`voucher`	body	books.Voucher	—
`voucher.description`	body	string	—	Description is the human line for the event, e.g. the vendor a bill came from.
`voucher.legs`	body	books.Leg[]	—	Legs are the sides of the posting.
`voucher.legs[].account`	body	string	—	Account is the chart-of-accounts number this side posts to, e.g. "5300".
`voucher.legs[].credit`	body	integer (int64)	—	Credit is the leg's credit in exact cents.
`voucher.legs[].debit`	body	integer (int64)	—	Debit is the leg's debit in exact cents.
`voucher.postingAt`	body	string	—	PostingAt is the RFC3339 instant the event posts at — the time every statement window filters on.
`voucher.sourceId`	body	string	—	SourceID is the source event's own id within that namespace.
`voucher.sourceKind`	body	string	—	SourceKind is the idempotency namespace naming what booked this, e.g. "scan".

Response

Status	Body	Meaning
`200`	books.BookResponse	ok
`default`	problem-details	refused

200 body — 2 fields.

Field	In	Type	Always	Description
`posted`	body	boolean	—	Posted is true when this call wrote the voucher, false when the same scan had already booked and nothing was written.
`scanId`	body	string	—	ScanID echoes the scan that was booked.

Failure carries the platform error shape — see Errors.

Examples

CLI

SDK

HTTP

MCP

hanzo books scan book

.ts

.py

.go

.rs

.java

import { Configuration, BooksApi } from 'hanzoai';

const api = new BooksApi(new Configuration({ accessToken: process.env.HANZO_API_KEY }));
const { data } = await api.postBooksScanBook({ override: false, scanId: "<scanId>" });

from hanzoai.cloud import ApiClient, Configuration
from hanzoai.cloud.api import BooksApi

client = ApiClient(Configuration(access_token=os.environ["HANZO_API_KEY"]))
result = BooksApi(client).post_books_scan_book(override=False, scan_id="<scanId>")

cfg := hanzoai.NewConfiguration()
cfg.AddDefaultHeader("Authorization", "Bearer "+os.Getenv("HANZO_API_KEY"))
client := hanzoai.NewAPIClient(cfg)

resp, _, err := client.BooksAPI.PostBooksScanBook(context.Background()).Execute()
if err != nil {
	return err
}

use hanzo_client::apis::{configuration::Configuration, books_api};

let mut cfg = Configuration::new();
cfg.bearer_access_token = std::env::var("HANZO_API_KEY").ok();

let result = books_api::post_books_scan_book(&cfg, Default::default()).await?;

import ai.hanzo.cloud.ApiClient;
import ai.hanzo.cloud.api.BooksApi;

ApiClient client = new ApiClient();
client.setBearerToken(System.getenv("HANZO_API_KEY"));

var result = new BooksApi(client).postBooksScanBook();

curl -X POST https://api.hanzo.ai/v1/books/scan/book \
  -H "Authorization: Bearer $HANZO_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
       "override": false,
       "scanId": "<scanId>"
     }'

MCP reaches books through the books tool, which names its 20 operations with its own verbs — this one among them, under a name only MCP declares. describe explains any of them:

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

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