LeadSquared Developer Centre


Attach a File to a Custom or Sales Activity

Let’s you attach a file to a sales/custom activity.


  • To upload a file to leads/activities in your LeadSquared account, refer to Upload a File.
  • This API will only work for activities where the “Allow Attachments” setting has been enabled. This setting can be enabled/disabled while creating or editing a custom activity type from the Custom Activities and Scores page.

Allow attachments in custom activity



POST https://{host}/v2/ProspectActivity.svc/Attachment/Add?accessKey=AccessKey&secretKey=SecretKey


Content-Type: application/json
JSON Body/Payload Icon
    "ProspectActivityId": "ActivityId",
    "AttachmentName": "Name",
    "Description": "Description",
    "AttachmentFile": "S3URL"

Request Parameters

Parameter Description


200 OK
Content-Type: application/json

HTTP Response Codes

Code Description
200 OK

This is the status code for successful API call.

401 Unauthorized

The API call was made with invalid access credentials. Check your AccessKey and SecretKey.

400 Bad Request

The message body on the request is not as per API specification. Make sure that content type is set to “application/json” and the JSON body has correct attribute names and structure.

404 Not Found

The API could not be found. Please check the API signature.

429 Too Many Requests

API calls exceeded the limit of 25 in 5 second(s)

500 Internal Server Error

The API called failed. There could be many reasons for it. Check the exception message to get more details.

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