# The Blockchain Application Programming Interface (API)

#### Data Api Access Services

Mỗi blockchain layer 1 sẽ có những chain explorer cho ta access vào nhưng sẽ rất mắc vì thế sau đây là danh sách so sánh mà Sơn đã tìm được.

<table border="1" cellpadding="0" cellspacing="0" data-sheets-root="1" dir="ltr" id="bkmrk-name-of-service-mont"><colgroup><col width="100"></col><col width="100"></col><col width="100"></col><col width="100"></col></colgroup><tbody><tr><td data-sheets-value="{"1":2,"2":"Name of Service"}">Name of Service</td><td data-sheets-value="{"1":2,"2":"Monthly Price"}">Monthly Price</td><td data-sheets-value="{"1":2,"2":"Max Requests"}">Max Requests</td><td data-sheets-value="{"1":2,"2":"Rate Per Minutes"}">Rate Per Minutes</td></tr><tr><td data-sheets-hyperlink="https://bds.birdeye.so/user/security" data-sheets-value="{"1":2,"2":"birdeye.so"}">[birdeye.so](https://bds.birdeye.so/user/security)</td><td data-sheets-numberformat="{"1":4,"2":"\"$\"#,##0","3":1}" data-sheets-value="{"1":3,"3":199}">$199</td><td data-sheets-value="{"1":2,"2":"10m"}">10m</td><td data-sheets-value="{"1":2,"2":"1000/m"}">1000/m</td></tr><tr><td data-sheets-hyperlink="https://dev.helius.xyz/dashboard/app" data-sheets-value="{"1":2,"2":"helius"}">[helius](https://dev.helius.xyz/dashboard/app)</td><td data-sheets-numberformat="{"1":4,"2":"\"$\"#,##0","3":1}" data-sheets-value="{"1":3,"3":49}">$49</td><td data-sheets-value="{"1":2,"2":"10m"}">10m</td><td data-sheets-value="{"1":2,"2":"50/s"}">50/s</td></tr><tr><td data-sheets-hyperlink="https://www.coingecko.com/en/api/pricing?utm_campaign=dex-api&utm_medium=referral&utm_source=geckoterminal" data-sheets-value="{"1":2,"2":"coingecko"}">[coingecko](https://www.coingecko.com/en/api/pricing?utm_campaign=dex-api&utm_medium=referral&utm_source=geckoterminal)</td><td data-sheets-numberformat="{"1":4,"2":"\"$\"#,##0","3":1}" data-sheets-value="{"1":3,"3":129}">$129</td><td data-sheets-value="{"1":2,"2":"500k"}">500k</td><td data-sheets-value="{"1":2,"2":"500/m"}">500/m</td></tr><tr><td data-sheets-hyperlink="https://www.ankr.com/docs/rpc-service/getting-started/intro/" data-sheets-value="{"1":2,"2":"ankr"}">[ankr](https://www.ankr.com/docs/rpc-service/getting-started/intro/)</td><td data-sheets-numberformat="{"1":4,"2":"\"$\"#,##0","3":1}" data-sheets-value="{"1":3,"3":10}">$10</td><td data-sheets-value="{"1":2,"2":"100m"}">100m</td><td data-sheets-value="{"1":2,"2":"1500/s"}">1500/s</td></tr><tr><td data-sheets-hyperlink="https://dashboard.alchemy.com/signup/plan" data-sheets-value="{"1":2,"2":"alchemy"}">[alchemy](https://dashboard.alchemy.com/signup/plan)</td><td data-sheets-numberformat="{"1":4,"2":"\"$\"#,##0","3":1}" data-sheets-value="{"1":3,"3":49}">$49</td><td data-sheets-value="{"1":2,"2":"400m"}">400m</td><td data-sheets-value="{"1":2,"2":"660/s"}">660/s</td></tr><tr><td data-sheets-hyperlink="https://www.quicknode.com/docs/solana" data-sheets-value="{"1":2,"2":"quicknode"}">[quicknode](https://www.quicknode.com/docs/solana)</td><td data-sheets-numberformat="{"1":4,"2":"\"$\"#,##0","3":1}" data-sheets-value="{"1":3,"3":49}">$49</td><td data-sheets-value="{"1":2,"2":"500m"}">500m</td><td data-sheets-value="{"1":2,"2":"2500/s"}">2500/s</td></tr></tbody></table>

Mình tạm thấy helius là tạm dùng được nhưng dữ liệu access chậm, chưa được tính real-time.