RESTful Sell APIs: Fulfillment
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Resolved! the provided authorization grant code is invalid or was issued to another client

I'm getting this error when trying to use OAUTH, i've checked and my key is in the right format i.e it does not start with "code=" {"error":"invalid_grant","error_description":"the provided authorization grant code is invalid or was issued to another...

Resolved! c# eBay Utility - going round in circles trying to handle multiple scopes / oAuthTokens etc

Having wasted around 12 hours so far I am dumping my brain here in the hope that someone can provide me that Eureka moment and tell me where I am going wrong. I develop using C# under VS2019, all I am trying to write is a simple utility to pull detai...

Gaining access to limited access API

How do I acquire access to the shipping_quotes API. I would like for my users to specify package and shipping information so they can receive quotes from various carriers. If there is another way I could achieve this without the API if I cannot obtai...

Resolved! Missing x-ebay-signature-key header when retrieving https://api.ebay.com/sell/fulfillment/v1/order

Up until a couple of hours ago we could retrieve orders as usual. But now I get the following Error: { "errors": [ { "errorId": 215001, "domain": "ACCESS", "category": "REQUEST", "message": "Missing x-ebay-signature-key header", "longMessage": "Missi...

Not able to complete OAuth process for Fulfillment API GetOrders

Hello,Been really struggling for 2 days now trying to successfully pull down orders from the Seller Fulfillment API. I am following the flow explained in this guide: https://developer.ebay.com/api-docs/static/oauth-tokens.htmlI am also following this...

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