---
title: "Producing messages"
description: "Producing messages — Python BabelQueue SDK (1.x)."
source: https://babelqueue.com/docs/babelqueue-python/1.x/producing-messages/
updated: 2026-06-06T00:00:00.000Z
---

# Producing messages

## With the runtime

Publish a message with its URN and payload. The `BabelQueue` runtime builds the
canonical envelope and pushes it to your broker:

```python
from babelqueue import BabelQueue

app = BabelQueue("redis://localhost:6379/0", queue="orders")

app.publish("urn:babel:orders:created", {
    "order_id": 1042,
    "amount": 99.90,
})
```

## With the codec only

If you manage the broker connection yourself, build the envelope with
`EnvelopeCodec` and publish the JSON to your own client:

```python
from babelqueue import EnvelopeCodec

env  = EnvelopeCodec.make("urn:babel:orders:created", {"order_id": 1042, "amount": 99.90})
body = EnvelopeCodec.encode(env)   # -> UTF-8 JSON string
# redis.rpush("queues:orders", body)
#   /  channel.basic_publish(body=body, ...)
```

The payload above is wrapped in the canonical `schema_version: 1` envelope —
identical to what every other SDK emits, with `meta.lang` set to `"python"`:

```json
{
  "job": "urn:babel:orders:created",
  "trace_id": "7b3f9c2a-e41d-4f88-9b2a-1c0d5e6f7a8b",
  "data": { "order_id": 1042, "amount": 99.90 },
  "meta": { "id": "f1e2d3c4-b5a6-4789-90ab-cdef01234567", "queue": "orders", "lang": "python", "schema_version": 1, "created_at": 1749132727000 },
  "attempts": 0
}
```

Next: [Consuming messages](/docs/babelqueue-python/1.x/consuming-messages/).