Seller Central connection failed — what to check
If your Seller Central connection fails, shows an error code, or displays "app not available", this guide covers the most common causes and how to resolve each one. The good news: your Ads Optimiser keeps working fully while you sort this out, because the Advertising API and Seller Central API are two independent connections.
Understanding the two connections
Before troubleshooting, it helps to know that 1smart.link connects to Amazon through two separate APIs:
Connection | What it provides | How it connects |
|---|---|---|
Amazon Advertising API | Ad spend, ACoS, ROAS, keywords, search terms, bid suggestions, Apply actions | Login with Amazon OAuth |
Selling Partner API (SP-API) | Total Sales, Sessions, Buy Box %, Listing CVR, TACoS, Total Orders | Seller Central OAuth |
These are completely independent. A problem with your Seller Central (SP-API) connection does not affect your Advertising API connection. You can continue using the full Ads Optimiser — including suggestions, Apply actions, AI-powered insights, and Rules & Automation — with only the Advertising API connected.
"App not available" or error code MD1000
This is the most common Seller Central connection error. It appears when the 1smart.link SP-API application is in a "submitted" or "edit pending review" state on Amazon's Appstore.
Why it happens: Whenever Amazon reviews an app update or rename, OAuth connections for that app are temporarily blocked. This is an Amazon-side restriction — it is not caused by anything on your account.
How to fix it:
Do nothing immediately. The review window typically lasts 24–48 hours.
Wait and try connecting again after that window passes.
No data is lost during this period. Once the review completes, the connection flow works normally again.
Note: The Advertising API uses a different app registration, so it is completely unaffected by this review state. Your ads dashboard, suggestions, and Apply actions all continue working.
OAuth token expired or revoked
If you previously connected Seller Central successfully but the connection has gone stale, you will see an error when the dashboard tries to fetch organic metrics. Stale connections happen for several reasons:
You changed your Amazon Seller Central password.
You revoked the app's access from Seller Central → Manage your apps.
The refresh token expired after an extended period of inactivity.
How to fix it:
Go to your Ads Optimiser dashboard at
/dashboard/ads/.Click the account dropdown in the top bar.
Select Connect Seller Central.
Complete the OAuth flow using your current Seller Central credentials.
This issues a fresh refresh token and restores the connection. Your organic metrics will begin populating again within a few minutes.
"No profiles available"
This error means the system cannot find any active advertising profiles linked to your Amazon account. It typically appears during the Advertising API connection rather than the SP-API connection, but it can surface during either flow.
How to fix it:
Visit advertising.amazon.com and sign in with the same Amazon credentials.
Confirm you have at least one active advertising profile (Sponsored Products, Sponsored Brands, or Sponsored Display).
If you have never created an advertising account, set one up first, then return to 1smart.link and reconnect.
Tip: If you operate in multiple marketplaces, make sure you are signing in with the credentials for the correct marketplace.
Account limit exceeded
Most 1smart.link subscriptions allow one Amazon profile per account. If you try to connect a second profile, the connection will fail with an error.
How to fix it:
Check which profile is already connected by opening the account dropdown on your Ads Optimiser dashboard.
If you need to switch profiles, disconnect the existing one first, then connect the new one.
If you need multiple profiles connected simultaneously, contact support. Admin and manager roles can bypass the single-profile limit.
How to reconnect Seller Central
Regardless of the cause, the reconnection steps are the same:
Go to
/dashboard/ads/.Click the account dropdown in the top bar.
Select Connect Seller Central (or Connect another account if prompted).
Sign in with your current Seller Central credentials and authorise the app.
Once complete, you will be returned to the dashboard. Organic metrics should begin appearing shortly.
What works while Seller Central is disconnected
You lose nothing on the advertising side. Everything powered by the Advertising API continues as normal:
Ad spend, ACoS, ROAS on the dashboard
Suggestions and Apply actions (bid changes, negative keywords)
AI-powered insights
Rules & Automation
Performance Trends graph (advertising data only)
What does not populate until SP-API reconnects
The following metrics will show a dash (—) on your dashboard until the Seller Central connection is restored:
Total Sales (PPC + organic combined)
Total Orders
Sessions
Buy Box %
Listing CVR
TACoS
TACoS per-ASIN table
A nudge banner on the dashboard will remind you to reconnect. No historical data is lost — once you reconnect, these metrics will populate again.
When to contact support
If you have tried reconnecting and the issue persists for more than 48 hours, reach out to the support team. Include the following details in your message:
Your marketplace (e.g. Amazon.in, Amazon.com)
Your account name in 1smart.link
The exact error code or message text you see
The approximate time of the failed attempt
This information helps the team diagnose the problem quickly.
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