MCP Allowlist Request - CloseBooks

MCP
1

Hi Square team,

Please add our MCP client to the allowlist. CloseBooks is a QuickBooks reconciliation app — merchants connect their Square account (read-only) so we can reconcile payments and settlements against their books.

  • Client name: CloseBooks
  • Domain: worker.app.closebooks.io
  • Redirect URI: https://worker.app.closebooks.io/psp/square-mcp/oauth/callback
  • Production Application ID: sq0idp-eMYWq1KEUY35iZunsoOObg
  • Scopes: PAYMENTS_READ, ORDERS_READ, SETTLEMENTS_READ, MERCHANT_PROFILE_READ

Thanks so much!
— Ledger Labs / CloseBooks

3

This has been submitted! It may take up to 5 business days to take effect. Let me know if you run into any issues.

5

Hi Ashley, just wanted to check if there’s any update on this. We’re still not able to use the Square MCP. Thanks!

6

Thanks Ashley — here’s the exact error in case it helps:

POST https://mcp.squareup.com/register → 400
"Invalid redirect URI: https://worker.app.closebooks.io/psp/square-mcp/oauth/callback - domain not in allowlist"

Could you confirm the allowlist entry went through?

Also, we missed a scope originally — please add PAYOUTS_READ.

Thanks!

7

Sorry to hear you are still having trouble. Looking into this today!

8

Thanks Ashley! I tried again today, but I’m still getting the same MCP not allowlisted error. Also, could you add PAYOUTS_READ to the existing scopes?

9

Just completed this could you try again now?