Replace stream

Reconfigures an existing stream; the path names the stream, and the immutable fields (storage, retention) must restate what they are.

PUT /v1/mq/stream/{name}

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Address	`https://api.hanzo.ai/v1/mq/stream/{name}`
Method	`PUT`
Operation	`put_mq_stream_by_name`
Auth	`Authorization: Bearer $HANZO_API_KEY`

Reconfigures an existing stream; the path names the stream, and the immutable fields (storage, retention) must restate what they are.

Request

10 fields, body application/json (required).

Field	In	Type	Required	Description
`name`	path	string	yes	Name is the stream name, unique within the org (alphanumeric, hyphens, underscores).
`max_age`	body	string	—	MaxAge caps message age, e.g. "24h" or "7d"; "0" (default) is unlimited.
`max_bytes`	body	integer (int64)	—	MaxBytes caps the stream's total stored bytes; -1 (default) is unlimited.
`max_msg_size`	body	integer (int32)	—	MaxMsgSize caps one message's size in bytes; -1 (default) is the broker's limit.
`max_msgs`	body	integer (int64)	—	MaxMsgs caps the number of stored messages; -1 (default) is unlimited.
`name`	body	string	—	Name is the stream name, unique within the org (alphanumeric, hyphens, underscores).
`num_replicas`	body	integer (int64)	—	Replicas is the number of stream replicas (1–5); this plane runs 1.
`retention`	body	string	—	Retention is the retention policy: limits (default), interest, or workqueue.
`storage`	body	string	—	Storage is the storage backend: file (default) or memory.
`subjects`	body	string[]	—	Subjects are the org-relative subjects bound to this stream (wildcards supported).

Response

Status	Body	Meaning
`200`	mq.Stream	ok
`default`	problem-details	refused

200 body — 22 fields.

Field	In	Type	Always	Description
`config`	body	mq.Config	—
`config.max_age`	body	string	—	MaxAge caps message age, e.g. "24h" or "7d"; "0" (default) is unlimited.
`config.max_bytes`	body	integer (int64)	—	MaxBytes caps the stream's total stored bytes; -1 (default) is unlimited.
`config.max_msg_size`	body	integer (int32)	—	MaxMsgSize caps one message's size in bytes; -1 (default) is the broker's limit.
`config.max_msgs`	body	integer (int64)	—	MaxMsgs caps the number of stored messages; -1 (default) is unlimited.
`config.name`	body	string	—	Name is the stream name, unique within the org (alphanumeric, hyphens, underscores).
`config.num_replicas`	body	integer (int64)	—	Replicas is the number of stream replicas (1–5); this plane runs 1.
`config.retention`	body	string	—	Retention is the retention policy: limits (default), interest, or workqueue.
`config.storage`	body	string	—	Storage is the storage backend: file (default) or memory.
`config.subjects`	body	string[]	—	Subjects are the org-relative subjects bound to this stream (wildcards supported).
`created`	body	string (date-time)	—	Created is when the stream was created.
`name`	body	string	—	Name is the stream name within the org.
`state`	body	mq.State	—
`state.bytes`	body	integer (uint64)	—	Bytes is the total stored size.
`state.consumer_count`	body	integer (int64)	—	Consumers is the number of consumers attached to this stream.
`state.first_seq`	body	integer (uint64)	—	FirstSeq is the sequence of the first stored message.
`state.first_ts`	body	string (date-time)	—	FirstTS is the timestamp of the first stored message.
`state.last_seq`	body	integer (uint64)	—	LastSeq is the sequence of the last stored message.
`state.last_ts`	body	string (date-time)	—	LastTS is the timestamp of the last stored message.
`state.messages`	body	integer (uint64)	—	Messages is the number of messages currently stored.
`state.num_deleted`	body	integer (int64)	—	Deleted is the number of deleted messages (sequence gaps).
`state.num_subjects`	body	integer (uint64)	—	Subjects is the number of distinct subjects stored.

Failure carries the platform error shape — see Errors.

Examples

CLI

SDK

HTTP

MCP

hanzo mq stream set <name>

.ts

.py

.go

.rs

.java

import { Configuration, MqApi } from 'hanzoai';

const api = new MqApi(new Configuration({ accessToken: process.env.HANZO_API_KEY }));
const { data } = await api.putMqStreamByName({ name: 'name', max_age: "<max_age>", max_bytes: 0 });

from hanzoai.cloud import ApiClient, Configuration
from hanzoai.cloud.api import MqApi

client = ApiClient(Configuration(access_token=os.environ["HANZO_API_KEY"]))
result = MqApi(client).put_mq_stream_by_name(name='name', max_age="<max_age>", max_bytes=0)

cfg := hanzoai.NewConfiguration()
cfg.AddDefaultHeader("Authorization", "Bearer "+os.Getenv("HANZO_API_KEY"))
client := hanzoai.NewAPIClient(cfg)

resp, _, err := client.MqAPI.PutMqStreamByName(context.Background()).Execute()
if err != nil {
	return err
}

use hanzo_client::apis::{configuration::Configuration, mq_api};

let mut cfg = Configuration::new();
cfg.bearer_access_token = std::env::var("HANZO_API_KEY").ok();

let result = mq_api::put_mq_stream_by_name(&cfg, Default::default()).await?;

import ai.hanzo.cloud.ApiClient;
import ai.hanzo.cloud.api.MqApi;

ApiClient client = new ApiClient();
client.setBearerToken(System.getenv("HANZO_API_KEY"));

var result = new MqApi(client).putMqStreamByName();

curl -X PUT https://api.hanzo.ai/v1/mq/stream/<name> \
  -H "Authorization: Bearer $HANZO_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
       "max_age": "<max_age>",
       "max_bytes": 0
     }'

MCP reaches mq through the mq tool, which names its 15 operations with its own verbs — this one among them, under a name only MCP declares. describe explains any of them:

curl -X POST https://api.hanzo.ai/v1/mcp \
  -H "Content-Type: application/json" \
  -d '{
       "jsonrpc": "2.0",
       "id": 1,
       "method": "tools/call",
       "params": {
         "name": "describe",
         "arguments": {
           "op": "get_mq_health"
         }
       }
     }'

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