API Documentation

FlashBlock provides a complete set of API interfaces for interacting with our services.

API Basics

• Base URL: https://api.flashblock.trade
• Authentication: Most endpoints require API key (except tip-related endpoints)
• Format: All requests and responses use JSON format

Available Endpoints

1. Send Transaction

   • Submit transactions using JSON-RPC 2.0 or custom REST API format

2. Get Random Tip Address

   • Get system-generated random tip address

3. Get Priority Fee

   • Get current priority fee in lamports

4. Adaptive Tip

   • Get adaptive tip amount based on network conditions

5. Get Transaction Error Details

   • Query error details by transaction hash

6. Error Codes

   • Complete list of error codes and descriptions

Authentication

Most API requests require an API key in the request header:

Authorization: YOUR_API_KEY

Note: Tip-related endpoints (/api/v2/randomTipAddress, /api/v2/prioritizeTipping, /api/v2/tip-floor) do not require authentication.

To obtain your API key, please send an email to [email protected] with your request.

Support

If you have any questions, please visit our Support Page.