Introduction to Seller API

The Whatnot Seller API allows Whatnot sellers to manage products in their store and receive notifications when products sell on Whatnot.

It is currently in Developer Preview, and therefore is subject to change.

During the Developer Preview, Whatnot is working with select partners to give beta access to the API for approved use cases. To see if your use case might be a fit for our partner program, please email us: [email protected]

We can't wait to see what you build! Please check out our Authentication and Rate limit guidelines to continue getting started, and if you have any questions don't hesitate to reach out to us at [email protected] .

We also encourage sellers to join our Slack as an External Member for support and giving feedback.

We have a GraphQL Playground available for you to try out the API. You can use this to explore the API and see what data is available. You can also try this out in production by changing the URL to https://api.whatnot.com/seller-api/graphql .

During Developer Preview, clients should use our staging environment. This will allow access to all features of our production app without the risk of users seeing your test products.

The Seller API is accessed using GraphQL. Many languages have packages avaliable to write GraphQL queries more easily. GraphQL queries are made by sending POST HTTP requests to the endpoint:

POST https://stage-api.whatnot.com/seller-api/graphql

Headers must include Authentication and "Content-Type": "application/json" .

For queries, the requests will be of the form

For example, a product query can be sent like this: