curl -X POST "http://localhost:9090/messages" \
  -H "Content-Type: application/json" \
  -d \
'{
  "messages": [
    {
      "dispatched_block_number": 10000,
      "message": {
        "version": 3,
        "nonce": 1234,
        "origin": 1,
        "destination": 2,
        "sender": "0xabc...",
        "recipient": "0xdef...",
        "body": [0, 3, 0, 23, 43, 65]
      }
    },
    {
      "dispatched_block_number": 10010,
      "message": {
        "version": 3,
        "nonce": 1235,
        "origin": 1,
        "destination": 2,
        "sender": "0xabc...",
        "recipient": "0xdef...",
        "body": [0, 3, 0, 23, 43, 65]
      }
    }
  ]
}'

const response = await fetch('http://localhost:9090/messages', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    messages: [
      {
        dispatched_block_number: 10000,
        message: {
          version: 3,
          nonce: 1234,
          origin: 1,
          destination: 2,
          sender: "0xabc...",
          recipient: "0xdef...",
          body: [0, 3, 0, 23, 43, 65]
        }
      },
      {
        dispatched_block_number: 10010,
        message: {
          version: 3,
          nonce: 1235,
          origin: 1,
          destination: 2,
          sender: "0xabc...",
          recipient: "0xdef...",
          body: [0, 3, 0, 23, 43, 65]
        }
      }
    ]
  })
});

import requests

response = requests.post('http://localhost:9090/messages', json={
  "messages": [
    {
      "dispatched_block_number": 10000,
      "message": {
        "version": 3,
        "nonce": 1234,
        "origin": 1,
        "destination": 2,
        "sender": "0xabc...",
        "recipient": "0xdef...",
        "body": [0, 3, 0, 23, 43, 65]
      }
    },
    {
      "dispatched_block_number": 10010,
      "message": {
        "version": 3,
        "nonce": 1235,
        "origin": 1,
        "destination": 2,
        "sender": "0xabc...",
        "recipient": "0xdef...",
        "body": [0, 3, 0, 23, 43, 65]
      }
    }
  ]
})

{
  "count": 4,
  "skipped": []
}