datatomcp

datatomcp hosts your tabular data for Claude. Upload a CSV, paste a CSV link, or pick a Google Sheet (private sheets work through Google's file picker, which grants access to that file only). Every import comes with a report: unparseable lines with their line numbers, numbers stored as text, mixed date formats. Nothing is converted until you confirm.

Claude gets five read-only tools: list_datasets, describe_dataset, query_rows, aggregate and distinct_values. Totals and counts are computed by a database (DuckDB), so Claude reports numbers instead of estimating them from pasted text, and a 50,000-row sheet that is too big to paste into a chat can still be queried. Every result names the dataset version it came from.

Free: 3 datasets, 100,000 rows each. Pro ($12 or €12 a month): 25 datasets, 2M rows each, hourly Google Sheets sync. Data is stored in the EU, read-only, and never sent to AI providers or used for training.