ritmex-bot/docs/binance/binance-spot/testnet_rest-api_data-sources.md

title, source, fetched_at

title	source	fetched_at
Data Sources | Binance Open Platform	https://developers.binance.com/docs/binance-spot-api-docs/testnet/rest-api/data-sources	2026-02-26T10:38:10.185Z

• The API system is asynchronous, so some delay in the response is normal and expected.
• Each endpoint has a data source indicating where the data is being retrieved, and thus which endpoints have the most up-to-date response.

These are the three sources, ordered by least to most potential for delays in data updates.

• Matching Engine - the data is from the Matching Engine
• Memory - the data is from a server's local or external memory
• Database - the data is taken directly from a database

Some endpoints can have more than 1 data source. (e.g. Memory => Database) This means that the endpoint will check the first Data Source, and if it cannot find the value it's looking for it will check the next one.