Read any Zoho Books endpoint (GET). path is everything after /books/v3, e.g. '/invoices', '/journals/123', '/chartofaccounts', '/contacts'. organization_id is added automatically. Read-only and always available.

Create or update any Zoho Books resource (POST or PUT). e.g. POST /invoices, PUT /items/123. Gated by ZOHO_ALLOW_WRITES.

Delete a Zoho Books resource (DELETE), e.g. /invoices/123. Disabled unless ZOHO_ALLOW_DELETE=true.

Create a manual journal entry (guarded wrapper). Refuses to post unless total debits == total credits. Gated by ZOHO_ALLOW_WRITES.

Create a GL account in the chart of accounts (guarded wrapper). Gated by ZOHO_ALLOW_WRITES.

Categorize an uncategorized bank-feed line IN PLACE (clears the feed queue without creating a parallel transaction). Route: POST /banktransactions/uncategorized/{transaction_id}/categorize (generic types) or .../categorize/{categorize_as} (expenses|customerpayments|vendorpayments). CONVENIENCE: pass offset_account_id (the non-bank side) and the wrapper maps it to the right field — for a money-IN deposit type it becomes from_account_id (credited) with to_account_id = the bank (debited); for categorize_as=expenses it becomes account_id with paid_through_account_id = the bank. amount/date and the bank account are AUTO-DERIVED from the feed line when omitted (pass bank_account_id to make that list lookup reliable). VERIFIED: owner contribution -> transaction_type='deposit', offset_account_id=; bank fee -> categorize_as='expenses', offset_account_id=. NOTE: offset auto-mapping assumes money-IN; for money-OUT/other directions pass explicit from_account_id/to_account_id/account_id or a full body. Gated by ZOHO_ALLOW_WRITES; Zoho's response is returned verbatim on error.

Match an uncategorized bank-feed line to one or more EXISTING transactions (invoices/bills/payments) rather than creating a new one. Confirmed route: POST /banktransactions/uncategorized/{transaction_id}/match. Provide transactions_to_be_matched as an array of { transaction_id, transaction_type }. Gated by ZOHO_ALLOW_WRITES; Zoho's response is returned verbatim on error.

Attach a document (receipt / source doc) to a Zoho Books record via multipart upload — e.g. an expense receipt (path '/expenses/{id}/receipt', field 'receipt'), a bill attachment (path '/bills/{id}/attachment', field 'attachment'), or a journal attachment (path '/journals/{id}/attachment', field 'attachment'). Provide the file EITHER as file_content (base64 — for docs you hold in-context / received in chat) plus file_name (filename WITH extension, e.g. 'invoice.pdf'; Zoho detects the type from it), OR as file_path (a file on the server host). Allowed types: gif, png, jpeg, jpg, bmp, pdf, xls, xlsx, doc, docx. Gated by ZOHO_ALLOW_WRITES.