Getting Started

Use this page to go from no setup to successfully submitting a Monad transaction via bloXroute Cloud API.

Monad will not be live until November 24, 2025.

1

Create a bloXroute Account

• Open the Register an account page:

• Follow the instructions there to:

  • Create your account

  • Verify your email (if required)

  • Log in to the bloXroute Account Portal

2

Obtain Your Authorization Header

• Open the Authorization Headers page

• In the Account Portal, locate your Authorization value. Copy it and treat it as a secret. In the rest of this page and subsequent Monad pages, we will refer to it as: Authorization: <YOUR-AUTHORIZATION-HEADER>

3

Test Your Cloud API Connection

Use the Cloud API IPs page to confirm the current Cloud API hostname and IPs:

For Monad, you will typically use:

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

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

• Or replace the DNS with a regional endpoint IP address listed in the Cloud API IPs page above

Test HTTPS

curl https://api.blxrbdn.com \
    -X POST \
    -H "Content-Type: application/json" \
    -H "Authorization: <YOUR-AUTHORIZATION-HEADER>" \
    -d '{"method": "quota_usage", "id": "1", "params": null}'

Test WebSocket

❯ wscat -c wss://api.blxrbdn.com/ws \
  --header "Authorization: <YOUR-AUTHORIZATION-HEADER>"

4

Submit Your First Monad Transaction

Monad transactions are submitted using the JSON-RPC method monad_tx.

You can use:

• Option A: HTTPS POST

• Option B: WebSocket (recommended for lowest latency)

Replace transaction and backrunme_reward_address with real values from your signing stack.