FIELD GUIDE · CONNECTING A SOURCE · № 08

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Connect Plaid

The finance coverage upgrade — banks SimpleFIN can't reach, each linked bank its own connection. Sign-in happens in Plaid's own hosted window; Postern never sees your bank login, and the Console simply polls until the bank appears.

a Plaid developer account · pay-per-bank (free ≤10-bank Trial) · hosted Link

1

Copy your keys from the Plaid dashboard

dashboard.plaid.com → Developers → Keys → copy the client_id and the Production secret.

2

Paste both into the Console

Console → Add a source → Plaid → client_id + secret → Save & add a bank.

The Console’s Plaid card with the client_id and Production secret pasted in.your-client-id

3

Link the bank in Plaid's own window

Hosted Link opens in a new tab. The phone pane's "Continue without phone number" works fine. Pick your bank, sign in, finish — the bank appears in the Console's panel; repeat for more banks in the same session.

Plaid Hosted Link: the phone pane, with Continue without phone number.Plaid Hosted Link: choosing a bank and signing in.

WHAT STANDS WHEN YOU FINISH

One connection per linked bank — accounts and transactions syncing on cadence, deduplicated against SimpleFIN where they overlap. Bank consent expires roughly annually; the Console shows each bank's health and a Reconnect. Disconnecting calls Plaid's /item/remove, which also stops that bank's billing.