Open the store’s Connect view and copy its Admin GraphQL URL and per-store Admin token.
Set the client’s Admin endpoint to that URL and send the token as X-Shopify-Access-Token.
Send one authenticated read such as a shop identity query. Reads work before a run.
Wait for Meguro to record the first call, then start the run before sending writes.
Success looks like
The connection listener records the read against the intended store without exposing either credential in a receipt.
If it fails
What happened: no read appeared. What it means: the process may be using a different URL or clipped token. What to do next: copy both fields again, confirm the header, and retry one read. Writes outside an active run are rejected.