Submit Transactions

Use this endpoint to send a single transaction on Base Mainnet using bloXroute’s Blockchain Distribution Network (BDN).

This Cloud API endpoint for sending transactions on Base Mainnet is available to all users, including those on the Introductory plan.

REQUEST

Method: blxr_tx

Parameters

Parameter	Description	Instructions & Notes
transaction	Raw transactions bytes without 0x prefix.	[Required] Learn more about constructing the transaction here.
blockchain_network	Blockchain network name.	[Required] Set to Base-Mainnet.
backrunme_reward_address	Wallet address String to receive BackRunMe rewards to	[Optional] Transactions are automatically enrolled in Backrunning services, from which rewards are shared with the specified backrunme_reward_address.

Cloud-API

• WebSocket endpoint: wss://api.blxrbdn.com/ws

• HTTPS POST endpoint: https://api.blxrbdn.com

You may also send to IP-specific endpoints (e.g., wss://<IP>/ws). See Cloud-API IPs for more.

Sending transactions via WebSocket instead of HTTPS can lead to a latency improvement of up to 10ms.

Examples

wscat WS

wscat -c wss://api.blxrbdn.com/ws --header "Authorization: <YOUR-AUTHORIZATION-HEADER>"
> {"jsonrpc": "2.0", "id": 1, "method": "blxr_tx", "params":
   {"transaction": "f86b0184...e0b58219", "blockchain_network": "Base-Mainnet"}}
< ...

HTTPS POST

RESPONSE

Result Fields

Result Field	Description
tx_hash	Transaction hash

Examples

Response

{
    "jsonrpc": "2.0", 
    "id": "1", 
    "result": {
        "tx_hash": "ffd59870844e5...bfa54a69"
    }
}    

Rate Limits

Plan	Max Transactions	Time Window
Ultra	10 tx	1 second
Enterprise-Elite	5 tx	1 second
Enterprise	3 tx	1 second
Professional	1 tx	5 seconds
Introductory	1 tx	5 seconds