Where can I find the technical documentation of the /json endpoint when accessing a PurpleAir sensor locally over the network? I’ve checked the API documentation , but the fields do not match. Where can I find the documentation for the JSON fields? In particular what does the pm2_5_atm and pm2_5_cf…

Local JSON endpoint documentation

Josh_PurpleAir (Joshua) December 19, 2023, 7:23pm 7

Documentation is now available in our Local JSON Documentation article.

Topic		Replies	Views
Sensor JSON Documentation Data	1	1785	December 14, 2025
API data varies from Local Data API	3	158	March 15, 2025
Documentation on SD Card CSV data Data	1	626	November 29, 2023
API Fields Descriptions API	19	5035	February 18, 2026
Pm2.5 data differs between JSON and API Data	2	166	January 27, 2025