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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

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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

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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.

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Support

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