Building an AI agent? Start with /llms.txt for the full site index.
Overview
Every dataset carries one of four grades, derived from its real availability and source — not hand-set.
Across the 61 sellable datasets, each is graded so you can tell at a glance how finished and how directly-sourced it is.
A grade is computed from the dataset's availability status and its canonical source role. It is not frozen in copy: when a dataset's real status changes, its grade — and its colour in the sidebar — changes with it.
"Verified" here means official + available + coverage-confirmed. It is not the stronger per-value / per-symbol reconciliation claim — that verification surface is still being built and is intentionally not shown until it produces real verified dates.
English is a semantic rewrite, not a machine translation.
