# REST API

- [HTTP request example](/rest-api/http-request-example.md): HTTP request example
- [HTTP interface API](/rest-api/http-interface-api.md): Websocket Quotes API Address Description GET Single Product K line query（High Low, Open, Close） GET Order Book（Depth） Query GET Latest transaction price query（Latest Price）
- [GET Single Product K line query（High Low, Open, Close）](/rest-api/http-interface-api/get-single-product-k-line-query.md): This interface can be used to query historical K-line data, but it only allows querying one product at a time. It is recommended to cache the retrieved historical K-lines in a local database. For clie
- [POST Query the latest 2 K lines of products in batches（High , Low, Open, Close）](/rest-api/http-interface-api/post-query-the-latest-2-k-lines-of-products-in-batches.md): This interface allows batch querying of multiple products and multiple K-line types (e.g., 1-minute, 15-minute, 30-minute), but only the latest two K-lines can be queried at once. For clients using th
- [GET Order Book（Depth） Query](/rest-api/http-interface-api/get-order-book-depth-query.md)
- [GET Latest transaction price query（Latest Price）](/rest-api/http-interface-api/get-latest-transaction-price-query.md)
- [GET Stocks product information query](/rest-api/http-interface-api/get-stocks-product-information-query.md): This interface only supports batch requests for basic information on US, HK, and A-share products. Request Frequency
- [GET Get Trading Halt and Resumption Information](/rest-api/http-interface-api/get-stocks-product-information-query-1.md): This interface only supports batch requests for basic information on US, HK, and A-share products. Request Frequency
- [Price changes, Market closure, Holidays, Limit up/down, New listings, and Delistings](/rest-api/http-interface-api/get-stocks-product-information-query-2.md): Price Change Calculation Alltick API does not provide price change or 24-hour price change fields. Users can calculate price changes using Alltick data. 1、Daily Price Change Calculation Method 1: