Published by Mrigank Singh, who runs an India–US
freight forwarder. That is an economic interest in this subject, stated here rather than
buried: findings that flatter that business get more scrutiny before publication, not less.
Data CC BY 4.0 · every series ships its own citation string ·
corrections are printed with the size of the error · the instruments are never sold.
/mcp — every instrument's tools, one endpoint, no key
/series/{slug}.csv — tidy long format
/series/{slug}.metadata.json — provenance + citation
/llms.txt — regenerated when an instrument is added
/method — definitions, grades, corrections