MCP YNAB Server

Instructions

Implementation Reference

• src/mcp_ynab/server.py:546-564 (helper)

  Helper function that searches a list of transactions for one matching the given transaction_id based on the specified id_type (id, import_id, transfer_transaction_id, or matched_transaction_id). Returns the matching TransactionDetail or None.

  def _find_transaction_by_id(
      transactions: List[TransactionDetail], transaction_id: str, id_type: str
  ) -> Optional[TransactionDetail]:
      """Find a transaction by its ID and ID type."""
      for txn in transactions:
          if (
              (id_type == "id" and txn.id == transaction_id)
              or (id_type == "import_id" and txn.import_id == transaction_id)
              or (
                  id_type == "transfer_transaction_id"
                  and txn.transfer_transaction_id == transaction_id
              )
              or (
                  id_type == "matched_transaction_id" and txn.matched_transaction_id == transaction_id
              )
          ):
              return txn
      return None