Create messages

Posts as Hanzo to the caller's connected Slack workspace.

POST /v1/provider/slack/messages

Provider → · All API references → · Get started →

Address	`https://api.hanzo.ai/v1/provider/slack/messages`
Method	`POST`
Operation	`post_provider_slack_messages`
Auth	`Authorization: Bearer $HANZO_API_KEY`

Posts as Hanzo to the caller's connected Slack workspace. Use channel from a message read and thread_ts to reply to a specific message. Requires chat:write; this operation does not join channels automatically.

Request

3 fields, body application/json (required).

Field	In	Type	Required	Description
`channel`	body	string	—	Channel is a Slack channel ID, name (#hanzo-gtm), or Slack channel mention.
`text`	body	string	—	Text is the message to post as Hanzo, up to 40000 characters.
`thread_ts`	body	string	—	ThreadTS optionally replies under this parent message's exact ts.

Response

Status	Body	Meaning
`200`	provider.slackSendMessageOut	ok
`default`	problem-details	refused

200 body — 2 fields.

Field	In	Type	Always	Description
`channel`	body	string	—	Channel is the resolved channel ID where the message was posted.
`ts`	body	string	—	TS is the posted message's exact Slack timestamp.

Failure carries the platform error shape — see Errors.

Examples

CLI

SDK

HTTP

MCP

hanzo provider slack messages create

.ts

.py

.go

.rs

.java

import { Configuration, ProviderApi } from 'hanzoai';

const api = new ProviderApi(new Configuration({ accessToken: process.env.HANZO_API_KEY }));
const { data } = await api.postProviderSlackMessages({ channel: "<channel>", text: "<text>" });

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

client = ApiClient(Configuration(access_token=os.environ["HANZO_API_KEY"]))
result = ProviderApi(client).post_provider_slack_messages(channel="<channel>", text="<text>")

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

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

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

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

let result = provider_api::post_provider_slack_messages(&cfg, Default::default()).await?;

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

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

var result = new ProviderApi(client).postProviderSlackMessages();

curl -X POST https://api.hanzo.ai/v1/provider/slack/messages \
  -H "Authorization: Bearer $HANZO_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
       "channel": "<channel>",
       "text": "<text>"
     }'

MCP reaches provider through the provider tool, which names its 38 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": "list_connections"
         }
       }
     }'

Provider API · All Hanzo APIs · Interactive reference

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