Update category on a posted transaction

Fetch and update transaction categories.

You can now edit or clear the note attached to any existing transaction via the new PATCH/api/v1/transaction/:transactionId endpoint.

What’s new

• Partial‑update method – Send a PATCH request with a JSON body:
  JSON

  {
    "categoryId": "00000000-0000-0000-0000-000000000000"   // null clears the category
  }

• Immediate response – The call returns the full Transaction object, reflecting the new or cleared note.
• Scope‑controlled – Requests must be authenticated with an API token that includes the updateTransactions scope (write permission).

In order to find your category IDs, you can use our new GET /api/v1/categories endpoint to fetch all categories for your organization.