Amazon SP-API Php JSON body upload without SDK

Job ID: 37209317

Budget: $30 – $250 USD

I am looking for a developer who can help me with the Amazon SP-API API and Php without using the SDK, specifically adding a JSON body upload . The main purpose of this project is to create new products and update existing products on Amazon using the SP-API Listings API.

We have already coded everything needed for authorization and have no problem with our GET requests, but have issues with POST requests returning a 403 Unauthorized when there is a POST that contains a body with a JSON payload. This is needed to add/update products.

Requirements:
- Familiarity with Amazon SP-API
- Strong experience in PHP and JSON
- Ability to upload JSON body in PHP without using the SDK
- Knowledge of Amazon marketplace operations

The API will be used for a single Amazon marketplace.

If you have the necessary skills and experience, please reach out to discuss the project further.
Related categories: PHP JSON Web API Amazon