Create Destination for Ebay Notifications API Returning 195020 - Challenge verification failed for..

[ragpiq_au]

Hey peeps,

I've been stuck on this for a few ours, and have very little idea of where to go from here. It might be due to ebay's account deletion notifications endpoint being currently disabled due to maintenance, but I don't see how this would effect notifications for account events.

So here's my tested setups, that all return the following error code:

Raw response for the API Status code 409 {"errors":[{"errorId":195020,"domain":"API_NOTIFICATION","category":"REQUEST","message":"Challenge verification failed for requested endpoint."}]}

Debugging:

🛠️ Tech Stack:

• n8n (Self-hosted) for automation
• eBay Notification API (/destination) for webhook setup
• cURL for API requests
• Webhook.site for debugging requests

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✅Webhook Setup Steps

1️⃣Register Webhook with eBay API (/destination)

I’m using the following cURL request to register a webhook with eBay:

sh

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curl -X POST "https://api.ebay.com/commerce/notification/v1/destination" \ -H "Authorization: Bearer YOUR_ACCESS_TOKEN" \ -H "Content-Type: application/json" \ -d '{ "deliveryConfig": { "endpoint": "https://n8n.ragpiq.com/webhook/ebay-notifications", "verificationToken": "my-secret-token" }, "name": "eBay Webhook Destination", "status": "ENABLED" }'

Issues Encountered:

• Initially, eBay was sending GET instead of POST, so my webhook wasn't triggering.
• eBay then rejected my webhook with "Challenge verification failed for requested endpoint."
• X-EBAY-SIGNATURE might contain the challenge code instead of the body.

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2️⃣Webhook Configuration in n8n

Webhook Node Setup:

• Path: /ebay-notifications
• Methods Allowed: GET & POST
• Response Mode: On Received

Webhook Response Block (Current Attempt)

I’ve tried different response formats, but this is the current configuration:

json

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{ "challengeResponse": "{{$json.query.challenge_code}}" }

or

json

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{ "challengeResponse": "{{$json.query.challenge_code}}" }

or

json

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{ "challengeResponse": "{{$headers['X-EBAY-SIGNATURE']}}" }