Create subscription

Subscribe a destination to a topic with optional filters and transforms.

POST /topics/{id}/subscriptions
Subscribe a destination to a topic with optional filters and transforms.

Authentication

API Key (header: X-API-Key) API Key (cookie: better-auth.session_token)

Path Parameters

id string required path
Resource ID (32-char hex)
Example: "a1b2c3d4e5f6a7b8c9d0e1f2a3b4c5d6"

Request Body required

Request body

application/json
destination_id string REQUIRED
Destination ID to subscribe
filter_rules object[]
Optional filter rules for this subscription
Array of:
transform_expression string
Optional JSONata transform expression

Responses

201 Subscription created
application/json
subscription unknown REQUIRED
400 Bad request
401 Unauthorized
404 Not found
409 Already subscribed 
curl -X POST 'https://hookstream.io/v1/topics/a1b2c3d4e5f6a7b8c9d0e1f2a3b4c5d6/subscriptions' \  -H 'Authorization: Bearer YOUR_API_TOKEN' \  -H 'Content-Type: application/json' \  -d '{  "destination_id": "string",  "filter_rules": [    {}  ],  "transform_expression": "string"}'
const response = await fetch('https://hookstream.io/v1/topics/a1b2c3d4e5f6a7b8c9d0e1f2a3b4c5d6/subscriptions', {  method: 'POST',  headers: {      "Authorization": "Bearer YOUR_API_TOKEN",      "Content-Type": "application/json"  },  body: JSON.stringify({    "destination_id": "string",    "filter_rules": [      {}    ],    "transform_expression": "string"  })});const data = await response.json();console.log(data);
import requestsheaders = {    'Authorization': 'Bearer YOUR_API_TOKEN'}response = requests.post('https://hookstream.io/v1/topics/a1b2c3d4e5f6a7b8c9d0e1f2a3b4c5d6/subscriptions', headers=headers, json={  "destination_id": "string",  "filter_rules": [    {}  ],  "transform_expression": "string"})print(response.json())
package mainimport (	"fmt"	"io"	"net/http"	"strings")func main() {	body := strings.NewReader(`{  "destination_id": "string",  "filter_rules": [    {}  ],  "transform_expression": "string"}`)	req, _ := http.NewRequest("POST", "https://hookstream.io/v1/topics/a1b2c3d4e5f6a7b8c9d0e1f2a3b4c5d6/subscriptions", body)	req.Header.Set("Authorization", "Bearer YOUR_API_TOKEN")	req.Header.Set("Content-Type", "application/json")	resp, _ := http.DefaultClient.Do(req)	defer resp.Body.Close()	result, _ := io.ReadAll(resp.Body)	fmt.Println(string(result))}
201 Response 
{  "subscription": {    "id": "<string>",    "org_id": "<string>",    "env_id": "<string>",    "topic_id": "<string>",    "destination_id": "<string>",    "filter_rules": "<string>",    "transform_expression": "<string>",    "enabled": 123,    "created_at": "<string>",    "destination_name": "<string>"  }}