Skip to main content
GET
/
v2
/
topics
/
{topicId}
/
messages
Get topic messages
curl --request GET \
  --url https://api.zenzap.co/v2/topics/{topicId}/messages \
  --header 'Authorization: Bearer <token>' \
  --header 'X-Signature: <api-key>' \
  --header 'X-Timestamp: <x-timestamp>'
{
  "messages": [
    {
      "id": "660e8400-e29b-41d4-a716-446655440001",
      "topicId": "550e8400-e29b-41d4-a716-446655440000",
      "senderId": "u@550e8400-e29b-41d4-a716-446655440001",
      "senderName": "Alice Johnson",
      "senderType": "user",
      "text": "Hello team!",
      "createdAt": 1699564800000,
      "updatedAt": 1699564800000,
      "isEdited": false,
      "isSystem": false,
      "attachments": [],
      "mentions": [],
      "reactions": []
    },
    {
      "id": "660e8400-e29b-41d4-a716-446655440002",
      "topicId": "550e8400-e29b-41d4-a716-446655440000",
      "senderId": "b@660e8400-e29b-41d4-a716-446655440003",
      "senderName": "API Bot",
      "senderType": "bot",
      "text": "Task created successfully",
      "createdAt": 1699564700000,
      "updatedAt": 1699564700000,
      "isEdited": false,
      "isSystem": false,
      "attachments": [],
      "mentions": [],
      "reactions": []
    }
  ],
  "nextCursor": "eyJ0IjoxNjk5NTY0NzAwMDAwLCJpZCI6IjY2MGU4NDAwLWUyOWItNDFkNC1hNzE2LTQ0NjY1NTQ0MDAwMiIsIm8iOiJkZXNjIn0=",
  "hasMore": true
}

Authorizations

​
Authorization
string
header
required

Use your API key as the Bearer token. You can view your API key and secret in your Zenzap organization API key settings.

​
X-Signature
string
header
required

HMAC-SHA256 signature for request verification.

Headers

​
X-Signature
string
required

HMAC signature of the request for authentication and replay protection.

Replay Protection: The signature includes a timestamp to prevent replay attacks. Requests with timestamps older than 5 minutes are rejected.

The signature payload differs by HTTP method:

  • POST/PUT/PATCH/DELETE: HMAC-SHA256 of {timestamp}.{body}
  • GET: HMAC-SHA256 of {timestamp}.{uri}

The signature is calculated as:

  1. Get the current Unix timestamp in milliseconds
  2. Determine the payload:
    • For POST/PUT/PATCH/DELETE: Use {timestamp}.{body} where body is the request body
    • For GET: Use {timestamp}.{uri} where uri is the full request URI (e.g., /v2/members?limit=10)
  3. Calculate HMAC-SHA256 of the combined payload using your API secret
  4. Hex-encode the output
  5. Include the timestamp in the X-Timestamp header

Example for GET request to /v2/members?limit=10:

timestamp = 1699564800000
payload = "1699564800000./v2/members?limit=10"
signature = HMAC-SHA256(secret, payload)
X-Signature: hex(signature)
X-Timestamp: 1699564800000

Example for POST request with body {"topicId":"123","text":"Hello"}:

timestamp = 1699564800000
payload = '1699564800000.{"topicId":"123","text":"Hello"}'
signature = HMAC-SHA256(secret, payload)
X-Signature: hex(signature)
X-Timestamp: 1699564800000

For multipart/form-data requests, sign the exact raw request body bytes (including boundaries and file bytes) as transmitted.

Pattern: ^[a-f0-9]{64}$
Example:

"a3d5f8e7c2b1d4f6a8e9c7b5d3f1a2e4b6c8d0f2e4a6b8c0d2e4f6a8b0c2d4e6"

​
X-Timestamp
integer<int64>
required

Unix timestamp in milliseconds when the request was created. Used for replay protection - requests older than 5 minutes are rejected.

Example:

1699564800000

Path Parameters

​
topicId
string<uuid>
required

The ID of the topic to get messages from

Query Parameters

​
limit
integer
default:50

Maximum number of messages to return (default: 50, max: 100)

Required range: 1 <= x <= 100
​
cursor
string

Opaque cursor for pagination. Use the value from nextCursor in the response. Cursors are cryptographically signed and validated server-side to prevent tampering.

​
before
integer<int64>

Return messages created before this timestamp (Unix milliseconds). Mutually exclusive with after.

​
after
integer<int64>

Return messages created after this timestamp (Unix milliseconds). Mutually exclusive with before.

​
senderId
string

Filter messages by sender ID

​
order
enum<string>
default:desc

Sort order for messages (default: desc - newest first)

Available options:
asc,
desc
​
includeSystem
boolean
default:true

Include system messages (default: true)

​
threadId
string<uuid>

Filter to messages within a specific thread (replies to a parent message)

​
includeReactionUsers
boolean
default:false

Include user IDs in reaction data (default: false, heavier payload)

Response

Messages retrieved successfully

​
messages
object[]

Array of message objects

​
nextCursor
string

Cursor for the next page. Pass this value to the cursor parameter to get the next page.

Example:

"eyJ0IjoxNjk5NTY0NzAwMDAwLCJpZCI6IjY2MGU4NDAwLWUyOWItNDFkNC1hNzE2LTQ0NjY1NTQ0MDAwMiIsIm8iOiJkZXNjIn0="

​
hasMore
boolean

Whether there are more messages to fetch

Example:

true