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Connect ChatGPT

Connect ChatGPT to your SellerJar data using OAuth. ChatGPT calls custom MCP connectors apps, and adding one requires enabling Developer mode first.

Before you start​

  • A SellerJar account (MCP access is available on all accounts)
  • A ChatGPT plan that includes Developer mode (custom apps)

Step 1: Enable Developer mode​

  1. On chatgpt.com, open Settings → Apps.
  2. Open Advanced settings and turn on Developer mode. (ChatGPT shows an "elevated risk" warning: this is standard for any custom connector. Leave "Enforce CSP in developer mode" as-is.)

Step 2: Create the SellerJar app​

  1. On the same Apps page, click Create app.
  2. Fill in the New App form:

    • Name: SellerJar

    • Description (optional): Read-only access to your SellerJar Amazon Ads data

    • Connection: keep Server URL selected and enter:

      https://api.sellerjar.com/mcp

      (Ignore the /sse example in the placeholder: the plain /mcp URL is correct.)

    • Authentication: OAuth. Once the URL is entered, "Advanced OAuth settings" shows the discovered settings: don't change anything there.

  3. Tick "I understand and want to continue" (ChatGPT shows this for every MCP server OpenAI hasn't reviewed) and click Create.

Step 3: Connect and authorize​

  1. On the SellerJar app page, click Connect. An "Add SellerJar to ChatGPT" dialog appears.
  2. Click Sign in with SellerJar.
  3. SellerJar's consent page opens, listing the read-only access being granted. Sign in if needed and click Approve: you'll be returned to chatgpt.com.

Step 4: Verify it works​

Start a new chat and ask:

List my SellerJar profiles.

If connected correctly, ChatGPT calls the list_profiles tool and returns your advertising profiles.

Troubleshooting​

ProblemCause / fix
No Create app button on the Apps pageDeveloper mode isn't enabled yet, see Step 1. If Advanced settings has no Developer mode toggle, your ChatGPT plan may not include it.
Create button stays disabledThe "I understand and want to continue" checkbox must be ticked.
Unauthorized (401)A password change disconnects OAuth-connected AIs, reconnect from the app's page in ChatGPT. It's also possible the connection was revoked from SellerJar's MCP page ("Connected AI clients" card), reconnect if so.
App can't find the serverRe-enter the URL exactly as https://api.sellerjar.com/mcp.

You can revoke ChatGPT's access at any time from SellerJar's MCP page: look for Connected AI clients and click revoke. It takes effect immediately.

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