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Built-in Modules > Sendle Class

Sendle Class

Important: This plugin relies on third-party resources. The resources might change or be discontinued without notice. Ensure you test the plugin extensively before production use, implement error handling with a try-catch block, have a backup shipping rate ready, and reach out to our support with detailed descriptions of any unexpected issues.


The Sendle class is crafted to provide real-time shipping rates from Sendle courier.

Class Definition

class Sendle {
  constructor(sendle_id, sendle_api_key, origin, destination) {
    // Class constructor

  async getRates(parcels) {
    // Method to fetch rates


  • sendle_id (String): The Sendle ID associated with your Sendle account.
  • sendle_api_key (String): The API key for your Sendle account.
  • origin (Object): The "origin" information from the DATA JSON object used in the calculateShippingRates function.
  • destination (Object): The "destination" information from the same DATA JSON object.

Usage Example

import { Sendle } from "./modules.js"
const sendle = new Sendle(env.sendle_id, env.sendle_api_key, DATA.origin, DATA.destination);
const parcels = [
  { weight: 5, weightUnit: 'KG', length: 10, height: 20, width: 30, metricUnit: "CM" },
  // ... additional parcels
const rates = await sendle.getRates(parcels);

This example showcases how to use the Sendle class by providing the required account credentials, origin, and destination details. The getRates method calculates the shipping rates for an array of parcels, each defined by weight, dimensions, and measurement units.


  • For parcels using the metric system, the values for metricUnit and weightUnit should be 'CM' and 'KG', respectively.
  • For parcels using the imperial system, the values should be 'IN' and 'LB', respectively.

The returned rates are formatted in the same way as Shopify's shipping rates, allowing for easy integration and consistency. For better security, your Sendle credentials should be saved in the env object as encrypted secret variables in the JsRates Settings page.

Sample AI Prompt

I'd like a shipping rate calculator that uses the Sendle rates.
The dimensiobns and weight of the parcels are contained in the items metafield namespace object called "carton". Get the first 15 values in the namespace. The dimensions are given in centimeters, and the weight in kilograms.

Sample AI Output

import { enrichItemDetails } from './modules.js';
import { Sendle } from './modules.js';

export async function calculateShippingRates(DATA, env) {
    try {
        // Enrich item details with 'carton' metafield
        DATA = await enrichItemDetails(DATA, [{ namespace: "carton", size: 15 }]);

        // Prepare parcels array for Sendle
        const parcels = => {
            const cartonMetafield = item.metafields && item.metafields.carton;
            return {
                length: cartonMetafield ? parseFloat(cartonMetafield.length) : 0,
                width: cartonMetafield ? parseFloat(cartonMetafield.width) : 0,
                height: cartonMetafield ? parseFloat(cartonMetafield.height) : 0,
                weight: cartonMetafield ? parseFloat(cartonMetafield.weight) : 0,
                weightUnit: 'KG',
                metricUnit: 'CM',
                quantity: item.quantity
        }).filter(parcel => parcel.length > 0 && parcel.width > 0 && parcel.height > 0 && parcel.weight > 0);

        // Initialize Sendle with environment variables
        const sendle = new Sendle(env.sendle_id, env.sendle_api_key, DATA.origin, DATA.destination);

        // Get rates from Sendle
        const rates = await sendle.getRates(parcels);

        return { rates };
    } catch (error) {
        // Return a rate with price equals to null in case of errors
        return { rates: [{ service_name: "", service_code: "", total_price: null, description: "", currency: "", min_delivery_date: "", max_delivery_date: "" }] };