Fix HireOtto MCP Connection Issues

Error during tool execution

Symptom: Everything was working fine, then multiple tools start returning “Error occurred during tool execution” — or all tool calls fail uniformly. No single tool is broken; they all are.This is almost never a server-side issue. It’s a known quirk with how Claude manages MCP connector sessions. The connection occasionally enters a stale state on Claude’s side, and requests stop reaching HireOtto’s server entirely.Fix: disconnect and reconnect the Otto connector

Go to claude.ai/customize/connectors
Disconnect the HireOtto connector
Reconnect it
Try any tool call again

This resolves the issue in almost every case. If tools are still failing after reconnecting, copy the exact error text from the tool output and email it to [email protected].How to tell this apart from a real outage: if the failure is session-related, all tools fail uniformly with a generic execution error. A real server-side issue tends to be more tool-specific.

No accounts showing up after authentication

Symptom: You completed the Google OAuth flow, but list_accessible_accounts returns empty, or HireOtto says no accounts are found.The most likely cause: you completed OAuth but didn’t select and save accounts on the account selection screen. The OAuth consent and the account save are two separate steps — completing one doesn’t complete the other.Fix:

Re-authenticate my Google Ads account.

When you reach the account selection screen after Google sign-in, select the accounts you want to work with (you can select all or pick specific ones) and confirm the save before returning to your client.Other causes:

You authenticated with a Google login that doesn’t have access to any Google Ads accounts. Sign in to ads.google.com with the same account to confirm.
Your campaigns are under a Manager account (MCC) that’s nested two levels deep. HireOtto resolves one level down automatically — for deeper hierarchies, you’ll need to connect a separate Google login with direct access to the inner MCC. See the Authentication guide.

MCP server not connecting

Symptom: Your AI client reports it can’t find the MCP server, or shows “Could not connect to MCP server.”Check the endpoint URLThe URL must be exactly:

https://googleads.hireotto.com/mcp

Common mistakes: trailing slash, missing s in https, typo in the hostname.

Authentication errors

Symptom: “Authorization required”, “Not authenticated”, or HireOtto returns an auth URL you haven’t clicked yet.Complete the one-time OAuth flow:

Your AI client should show an authorization URL. If it doesn’t, trigger it:
```
Connect my Google Ads account.
```
Open the URL, sign in with the Google account that has access to your Google Ads, and complete the consent screen.
On the account selection screen, select and save your accounts.
Return to your client and retry.

If you previously authorized but are seeing this again, your token may have been revoked (this can happen if you changed your Google password or revoked third-party app access). Re-run the connect flow to get a fresh token.

Insufficient permissions or access denied

Symptom: “Insufficient permissions”, “Access denied”, or “You don’t have permission to perform this action.”Check the authorized accountSign in to ads.google.com with the same Google account used during OAuth. If you can’t see the campaigns you’re trying to manage, you authorized the wrong account. Re-authenticate with the correct one:

Re-authenticate my Google Ads account.

Check your user roleGoogle Ads enforces role-based permissions:

Role	Read	Write (create, update, pause)
Read-only	Yes	No
Standard	Yes	Yes
Admin	Yes	Yes

If you’re Read-only, you can pull reports and list campaigns but cannot create campaigns, modify budgets, or add keywords. Contact the account owner to upgrade your role.

Campaign creation fails

Symptom: Campaign creation returns an error or the campaign doesn’t appear in Google Ads.Check account standingGoogle blocks campaign creation if there are billing issues, policy violations, or the account is suspended. Check at ads.google.com:

Valid payment method on file
No policy violation warnings
Account not suspended

Check your roleCampaign creation requires Standard or Admin access. Read-only users cannot create campaigns.Partial creationIf a campaign was partially created before the error (campaign exists but ad groups weren’t created), review and clean up in the Google Ads UI before retrying.

​Still stuck?

Still stuck?