Troubleshooting

Ordered roughly by how often each one comes up.

Connected, but every answer is empty

The connection is fine; the data is not there yet. Check in this order:

Is Seller Central connected in Propamp? Open the web app. If the dashboard is empty there too, MCP has nothing to read. See Connecting Sales Channels.
Has the first sync finished? A freshly connected account takes time to backfill.
Is the marketplace right? Asking about DE when you only sell in US returns nothing, correctly. See Marketplaces & Dates.

`401 Unauthorized`

The client has no valid token. Either it never completed the sign-in, or the token was revoked.

Claude — remove the connector and add it again, then complete the browser sign-in.
Codex — run codex mcp login propamp.

A 401 on your very first request, before any sign-in, is expected — it is how the server tells the client where to authenticate.

`404` partway through a session

An idle session expired after 60 minutes. Compliant clients start a new one automatically; if yours does not, restart the session or the client. Nothing is wrong with your account.

Signed in, but no tools appear

Two causes, in order of likelihood:

Seller Central is not connected yet — see above.
Your plan needs the MCP access add-on. Trial organizations have MCP access included; paid plans need the add-on to connect an outside client. Email [email protected].

To see which organization the session is actually authenticated as, ask your assistant to run mcp_debug_backend_config. To check the Propamp backend is reachable, mcp_debug_backend_ping. See Diagnostics.

A billing message where the data should be

External MCP access is not enabled for your organization. The message your client shows comes straight from Propamp billing. Email [email protected].

The connector will not save (Claude)

Custom connectors need a Claude Pro plan or above. They are not available on Free.

The URL is rejected, or the server is not found

Confirm it is exactly this, with no /sse suffix and no trailing slash:


https://mcp.propamp.ai/mcp

⚠️

If you followed an older guide to https://mcp.propamp.ai/mcp/sse, that is the legacy transport. It still serves existing connectors, but Codex and several other clients cannot speak it at all — they will report a connection or SSE error rather than a clear message. Switch to /mcp.

To prove the endpoint is reachable independently of any client, see verifying the server is reachable. A 401 there is a healthy result.

Amazon Ads tools are missing

They appear only when an Amazon Ads key is connected in Propamp. Campaign-editing tools are additionally off by default and enabled per organization on request. See Amazon Ads (Beta).

A tool call fails with a validation error

The request reached Propamp but a field was rejected. Almost always a marketplace code or a date format — see Marketplaces & Dates. Tell your assistant the exact error; it can usually correct the call itself.

Nothing here matches

Email [email protected] with:

your Propamp account email
which client you are connecting, and its version
the exact error text, and whether sign-in completed
roughly when it started

Connection problems are usually resolved the same working day.