Peddler

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Peddler is a Ruby interface to the Amazon Selling Partner API (SP-API). The SP-API enables Amazon sellers and vendors to programmatically access their data on orders, shipments, payments, and more.

To begin using the Amazon SP-API, you must register as a developer and register your application. Once registered, obtain your Login with Amazon (LWA) credentials to access your own or other selling partners' data.

Peddler

Installation

Add this line to your Gemfile.

gem "peddler", "3.0.0.beta1"

And then execute:

bundle install

Usage

Set your LWA credentials in your environment.

export LWA_CLIENT_ID=<YOUR_CLIENT_ID>
export LWA_CLIENT_SECRET=<YOUR_CLIENT_SECRET>

Require the library.

require "peddler"

Authorization

A seller or vendor provides you a refresh token to access their data on Amazon.

refresh_token = Peddled::Token.request(
  code: "<AUTHORIZATION_CODE>"
).parse["refresh_token"]

You use this to generate a temporary access token to authenticate individual API requests.

access_token = Peddler::Token.request(
  refresh_token: "<REFRESH_TOKEN>",
).parse["access_token"]

Similarly, you can request a token for grantless operations.

access_token = Peddler::Token.request(
  scope: "sellingpartnerapi::notifications",
).parse["access_token"]

If you haven’t set your LWA credentials as environment variables, pass them directly when requesting the token.

access_token = Peddler::Token.request(
  client_id: "<YOUR_CLIENT_ID>",
  client_secret: "<YOUR_CLIENT_SECRET>",
  refresh_token: "<REFRESH_TOKEN>",
).parse["access_token"]

Access tokens are valid for one hour. To optimize performance, cache the token and reuse across calls.

In Rails, if you're storing a refresh token in a model representing a selling partner, implement a method there to retrieve and cache access tokens:

class Seller
  "..."

  def access_token
    Rails.cache.fetch("#{cache_key}/access_key", expires_in: 1.hour) do
      Peddler::Token.request(
        refresh_token:,
      ).parse["access_token"]
    end
  end
end

Rate limiting

Amazon’s Selling Partner API (SP-API) imposes rate limits on most operations. Peddler respects these limits and automatically backs off when throttled. To override the default rate limit, pass a :rate_limit argument when running an operation.

Note: This functionality requires version 6 of the underlying HTTP library. As of writing, this is not released yet. To use rate limiting, point to their main branch on GitHub.

The APIs

Peddler provides a class for each API version under an eponymous namespace. Below is a list of the more important APIs, along with brief descriptions and code examples to help you get started.

Catalog Items API (2022-04-01)

Provides programmatic access to Amazon's catalog data, such as item titles, descriptions, and other product details.

api = Peddler.catalog_items_2022_04_01(aws_region, access_token)
response = api.get_catalog_item(
  marketplaceIds: ["ATVPDKIKX0DER"],
  asin: "B08N5WRWNW"
)
items = response.parse.dig("items")

Orders API (v0)

Allows you to retrieve order information, including order details, buyer information, and order items.

api = Peddler.orders_v0(aws_region, access_token)
response = api.get_orders(
  marketplaceIds: ["ATVPDKIKX0DER"],
  createdAfter: "2023-01-01T00:00:00Z"
)
response.parse.dig("orders")

Feeds API (2021-06-30)

Enables you to upload data to Amazon for updating listings, prices, inventory, and more.

api = Peddler.feeds_2021_06_30(aws_region, access_token)

# Create a feed document to get an upload URL
response = api.create_feed_document(
  contentType: "text/xml; charset=UTF-8"
)
feed_document_id = response.parse["feedDocumentId"]
upload_url = response.parse["url"]

# Upload the feed content to the provided URL
feed_content = File.read("inventory_update.xml")
api.upload_feed_document(upload_url, feed_content)

# Create the feed
response = api.create_feed(
  feedType: "POST_INVENTORY_AVAILABILITY_DATA",
  marketplaceIds: ["ATVPDKIKX0DER"],
  inputFeedDocumentId: feed_document_id
)
response.parse["feedId"]

Reports API (2021-06-30)

Allows you to request and download various reports, such as order and inventory reports.

api = Peddler.reports_2021_06_30(aws_region, access_token)
response = api.create_report(
  reportType: "GET_FLAT_FILE_OPEN_LISTINGS_DATA",
  marketplaceIds: ["ATVPDKIKX0DER"]
)
response.parse["reportId"]

Listings Items API (2021-08-01)

Enables you to manage your product listings on Amazon, including creating, updating, and deleting listings.

api = Peddler.listings_items_2021_08_01(aws_region, access_token)
response = api.put_listings_item(
  "<SELLER_ID>",
  "SKU123",
  "ATVPDKIKX0DER",
  body: {
    productType: "PRODUCT",
    requirements: "LISTING",
    attributes: {
      title: [{ value: "New Product Title" }],
      description: [{ value: "Product description goes here." }],
      bullet_point: [{ value: "Feature 1" }, { value: "Feature 2" }],
      manufacturer: [{ value: "Your Brand" }]
    }
  }
)
response.parse

Notifications API (v1)

Allows you to subscribe to notifications for specific events like order status updates or feed processing statuses.

api = Peddler.notifications_v1(aws_region, access_token)
# Create a destination
response = api.create_destination(
  name: "MySQSQueue",
  resourceSpecification: {
    sqs: {
      arn: "arn:aws:sqs:us-east-1:123456789012:MyQueue"
    }
  }
)
destination_id = response.parse["destinationId"]

# Create a subscription
response = api.create_subscription(
  notificationType: "ANY_OFFER_CHANGED",
  destinationId: destination_id
)
subscription = response.parse

Product Fees API (v0)

Provides information about fees that may be charged for selling products on Amazon.

api = Peddler.product_fees_v0(aws_region, access_token)
response = api.get_my_fees_estimate_for_sku(
  sellerId: "<YOUR_SELLER_ID>",
  sku: "SKU123",
  body: {
    FeesEstimateRequest: {
      MarketplaceId: "ATVPDKIKX0DER",
      IsAmazonFulfilled: true,
      PriceToEstimateFees: {
        ListingPrice: {
          CurrencyCode: "USD",
          Amount: 25.00
        }
      }
    }
  }
)
fees_estimate = response.parse

Fulfillment Outbound API (2020-07-01)

Allows you to create and manage fulfillment orders using Amazon's fulfillment network.

api = Peddler.fulfillment_outbound_2020_07_01(aws_region, access_token)
response = api.create_fulfillment_order(
  body: {
    sellerFulfillmentOrderId: "ORDER123",
    displayableOrderId: "ORDER123",
    displayableOrderDate: Time.now.iso8601,
    displayableOrderComment: "Thank you for your order!",
    shippingSpeedCategory: "Standard",
    destinationAddress: {
      name: "John Doe",
      addressLine1: "123 Main St",
      city: "Anytown",
      stateOrRegion: "NY",
      postalCode: "12345",
      countryCode: "US"
    },
    items: [
      {
        sellerSku: "SKU123",
        sellerFulfillmentOrderItemId: "ITEM123",
        quantity: 1
      }
    ]
  }
)
response.parse

Merchant Fulfillment API (v0)

Allows you to create shipping labels for orders using Amazon's negotiated shipping rates.

api = Peddler.merchant_fulfillment_v0(aws_region, access_token)
response = api.get_eligible_shipping_services(
  body: {
    shipmentRequestDetails: {
      amazonOrderId: "ORDER123",
      itemList: [
        {
          orderItemId: "ITEM123",
          quantity: 1
        }
      ],
      shipFromAddress: {
        name: "Your Company",
        addressLine1: "123 Warehouse Ave",
        city: "Anytown",
        stateOrRegion: "NY",
        postalCode: "12345",
        countryCode: "US"
      },
      packageDimensions: {
        length: 10,
        width: 5,
        height: 8,
        unit: "INCHES"
      },
      weight: {
        value: 2,
        unit: "POUNDS"
      },
      shippingServiceOptions: {
        deliveryExperience: "DELIVERY_CONFIRMATION_WITHOUT_SIGNATURE",
        carrierWillPickUp: false
      }
    }
  }
)
shipping_services = response.parse["shippingServiceList"]

Vendor Orders API (2021-12-29)

Allows vendors to retrieve purchase orders and order details from Amazon.

api = Peddler.vendor_orders_2021_12_28(aws_region, access_token)
response = api.get_purchase_orders(
  shipToPartyId: "<PARTY_ID>",
  limit: 10,
  createdAfter: "2023-01-01T00:00:00Z"
)
purchase_orders = response.parse["purchaseOrders"]

Vendor Direct Fulfillment Shipping API (2021-12-28)

Enables vendors to manage shipping labels and shipping information for direct fulfillment orders.

api = Peddler.vendor_direct_fulfillment_shipping_2021_12_28(aws_region, access_token)
response = api.get_packing_slip(
  purchaseOrderNumber: "PO123456789"
)
response.parse

Vendor Direct Fulfillment Orders API (2021-12-28)

Allows vendors to receive orders for direct fulfillment and provide shipment confirmations.

api = Peddler.vendor_direct_fulfillment_orders_2021_12_28(aws_region, access_token)
response = api.get_orders(
  createdAfter: "2023-01-01T00:00:00Z",
  limit: 10
)
response.parse["orders"]

Vendor Direct Fulfillment Inventory API (2021-12-28)

Enables vendors to update inventory levels for direct fulfillment items.

api = Peddler.vendor_direct_fulfillment_inventory_2021_12_28(aws_region, access_token)
response = api.submit_inventory_update(
  body: {
    inventory: [
      {
        sellingParty: {
          partyId: "<PARTY_ID>"
        },
        warehouseId: "<WAREHOUSE_ID>",
        items: [
          {
            buyerProductIdentifier: "B08N5WRWNW",
            availableQuantity: {
              amount: 100,
              unitOfMeasure: "Each"
            }
          }
        ]
      }
    ]
  }
)
response.parse

Shipping API (v2)

Provides functionalities for purchasing shipping labels and tracking shipments.

api = Peddler.shipping_v2(aws_region, access_token)
response = api.purchase_shipment(
  body: {
    clientReferenceId: "CLIENT_REF_123",
    shipTo: {
      name: "John Doe",
      addressLine1: "123 Main St",
      city: "Anytown",
      stateOrRegion: "NY",
      postalCode: "12345",
      countryCode: "US"
    },
    shipFrom: {
      name: "Your Company",
      addressLine1: "123 Warehouse Ave",
      city: "Anytown",
      stateOrRegion: "NY",
      postalCode: "12345",
      countryCode: "US"
    },
    packages: [
      {
        dimensions: {
          length: 10,
          width: 5,
          height: 8,
          unit: "IN"
        },
        weight: {
          value: 2,
          unit: "LB"
        }
      }
    ],
    serviceType: "Standard"
  }
)
response.parse

Token API (2021-03-01)

Allows you to create restricted data tokens to access personally identifiable information (PII) in specific API calls.

api = Peddler.tokens_2021_03_01(aws_region, access_token)
response = api.create_restricted_data_token(
  body: {
    restrictedResources: [
      {
        method: "GET",
        path: "/orders/v0/orders/123-1234567-1234567",
        dataElements: ["buyerInfo", "shippingAddress"]
      }
    ]
  }
)
restricted_data_token = response.parse["restrictedDataToken"]

# Use the token in subsequent API calls
orders_api = Peddler.orders_2021_12_01("<AWS_REGION>", restricted_data_token)
response = orders_api.get_order(
  orderId: "123-1234567-1234567"
)
response.parse

Finances API (v0)

Provides information about financial events for your seller account, such as order payments, refunds, and fees.

api = Peddler.finances_v0(aws_region, access_token)
response = api.list_financial_events(
  postedAfter: "2023-01-01T00:00:00Z",
  maxResultsPerPage: 100
)
response.parse

Sellers API (V1)

Provides information about seller's marketplaces and participation status.

api = Peddler.sellers_v1(aws_region, access_token)
response = api.get_marketplace_participations
response.parse

TODO

  • Code generate models to parse payload. Consider using dry-struct.
  • Code generate the APIs section—descriptions and code examples—in this README here.
  • Schedule code generation with GitHub Actions. Push new gem when models change.
  • Review and consider applying these patches.