data-column-profile

Installation
SKILL.md

Dataset column profiler

data.column-profile on https://fittings.sh. One endpoint, deterministic compute.

Per-column profile of a CSV or NDJSON payload: null rate, cardinality, inferred type, numeric range, mean, standard deviation and most frequent values.

The call

POST https://fittings.sh/v1/data/column-profile
Field Type Required Notes
data string yes CSV or NDJSON, up to 5000000 characters, 100000 rows, 256 columns and 1000000 cells
format string no 'csv' (default) or 'ndjson'
delimiter string no CSV only. Single character, defaults to comma

Example input:

Installs
3
First Seen
Aug 18, 2026