Can Spark Shipping send orders to my vendor's shopping cart?

Typically any manufacturer, distributor, dropshipper, fulfillment house, etc. will define how data is imported and exported. They should be able to provide you this upon request.

If your "vendor" is just another web site, they most likely do not have this setup.

It is your vendor's responsibility to provide data imports and exports. Even if your vendor runs one of the supported shopping carts we usually can not automatically create orders or get inventory from their shopping cart.

The exceptions are vendors whose store runs on Shopify or WooCommerce (see WooCommerce as a vendor). With the pre-built Shopify vendor integration, Spark Shipping can pull the vendor's inventory and send orders to their Shopify store. The vendor has to connect their store and approve access (Spark Shipping can email them a link to do this). See Shopify as a vendor.

Example 1-  We can automatically get orders from your site, generate a CSV file, and send that file to your vendor. It's your vendor's responsibility to import the order data into their shopping cart.

Example 2 - Your vendor can send you their inventory in a CSV file or any other supported method. This is something your vendor needs to setup and prepare ahead of time.