Attaching files to Salesforce via Postman involves two key steps:

1. Obtaining an access token.

2. Using the POST method to upload the file.

Here’s a step-by-step guide to help you achieve this

 

Step 1: Get an Access Token

Before making API calls to Salesforce, you need an OAuth 2.0 access token.

Steps to Obtain an Access Token: Get Access Token Using Postman

 

Step 2: Upload the File Using the POST Method

Endpoint

To upload a file to Salesforce, use the ContentVersion API:

1. Set Up the Request:

   • Method: POST

   • URL: https://<yourInstance>/services/data/v57.0/sobjects/ContentVersion/

2. Add Headers:

   • Authorization: Bearer <Your Access Token>

   • Content-Type: application/json

3. Add the Body (as raw JSON):

   {
   "Title": "Salesforce Test Image",
   "PathOnClient": "Salesforce.PNG",
   "ContentLocation": "S",
   "OwnerId": "<OwnerId>",
   "VersionData": "<Blob of the image>"
   }

• Title: The name of the file as it will appear in Salesforce.

• PathOnClient: The original name of the file on the client device.

• ContentLocation: Indicates whether the file is stored internally (S) or externally.

• OwnerId: The Salesforce user ID who owns the file.

• VersionData: The file's data encoded in Base64 format. You can use tools like Postman or programming libraries to encode your file into Base64.

1. Send the Request:

   • Click Send in Postman.

   • If successful, Salesforce will return a JSON response with details about the uploaded file, including the ContentDocumentId. 

 

 

 Step 3: Verify the File in Salesforce

After uploading, you can verify the file:

1. Navigate to the Files tab in Salesforce.

2. Search for the file we just created with title name.

3. Confirm that the file has been uploaded and is accessible.