Step by Step Guide to Building an Amazon Seller Central API Integration in Go

Aug 2, 2024 • 5 minute read

Hey there, fellow Go developer! Ready to dive into the world of Amazon Seller Central API integration? You're in for a treat. We'll be using the github.com/amzapi/selling-partner-api-sdk package to make our lives easier. Let's get started!

Introduction

Amazon Seller Central API is a powerful tool that allows you to programmatically access your seller account data. With the github.com/amzapi/selling-partner-api-sdk package, we can tap into this API using Go. It's like having a direct line to Amazon's vast e-commerce ecosystem!

Prerequisites

Before we jump in, make sure you've got:

Go installed on your machine (I know you probably do, but just checking!)
An Amazon Seller Central account
API credentials (Access Key, Secret Key, Refresh Token)

Got all that? Great! Let's move on.

Setting up the project

First things first, let's set up our Go module:

mkdir amazon-seller-api-integration
cd amazon-seller-api-integration
go mod init amazon-seller-api-integration

Now, let's install our star player:

go get github.com/amzapi/selling-partner-api-sdk

Configuring the SDK

Time to write some Go! Create a main.go file and let's get configuring:

package main

import (
    "fmt"
    "github.com/amzapi/selling-partner-api-sdk/pkg/config"
    "github.com/amzapi/selling-partner-api-sdk/pkg/selling"
)

func main() {
    cfg := config.NewConfiguration(
        config.WithAccessToken("your-access-token"),
        config.WithSecretKey("your-secret-key"),
        config.WithRefreshToken("your-refresh-token"),
        config.WithRegion("your-region"),
    )

    client := selling.NewAPIClient(cfg)

    // We're ready to rock!
}

Making API requests

Now for the fun part - let's fetch some order information:

func getOrders(client *selling.APIClient) {
    resp, r, err := client.OrdersV0Api.GetOrders(context.Background()).Execute()
    if err != nil {
        fmt.Printf("Error: %v\n", err)
        fmt.Printf("Full HTTP response: %v\n", r)
        return
    }
    fmt.Printf("Response: %v\n", resp)
}

Want to update inventory? No problem:

func updateInventory(client *selling.APIClient) {
    body := selling.InventoryUpdate{
        // Fill in the inventory details
    }
    resp, r, err := client.FbaInventoryApi.UpdateInventory(context.Background()).Body(body).Execute()
    if err != nil {
        fmt.Printf("Error: %v\n", err)
        fmt.Printf("Full HTTP response: %v\n", r)
        return
    }
    fmt.Printf("Response: %v\n", resp)
}

Handling responses

The SDK returns responses in a nice, structured format. But always be prepared for errors:

if err != nil {
    switch t := err.(type) {
    case selling.GenericOpenAPIError:
        fmt.Printf("Error message: %v\n", t.Error())
        fmt.Printf("Error body: %v\n", t.Body())
    default:
        fmt.Printf("Error: %v\n", err)
    }
    return
}

Best practices

Remember to implement rate limiting to stay within Amazon's API usage limits. Also, don't forget to refresh your access token regularly:

func refreshToken(client *selling.APIClient) {
    // Implement token refresh logic here
}

Advanced topics

Want to level up? Look into implementing webhooks for real-time updates and batch operations for handling large datasets. These topics deserve their own articles, so we'll save them for another day!

Conclusion

And there you have it! You've just built an Amazon Seller Central API integration in Go. Pretty cool, right? Remember, this is just the tip of the iceberg. There's so much more you can do with this API.

Keep exploring, keep coding, and most importantly, have fun with it!

Further resources

Happy coding, Gophers!