APIs used for Integration

Use case → Reference	`command` / primary value
Prerequisite — PayU Hosted Checkout (Integration)	PayU Hosted Checkout must be available/enabled for the merchant (Checkout Plus is an add-on UX)
Embed Checkout Plus (modal) — Integrate Checkout Plus (Integration)	Same as hosted: browser flow to `_payment`, presented inside a PayU-served modal on your site (see full guide for snippet/SDK)
Collect payment (underlying PG request) — Collect Payment API (PayU Hosted Checkout)	Form `POST` to `_payment` parameters as for hosted checkout (modal wraps this flow)
Verify a payment — Verify Payment API	`verify_payment`
Check transaction info — Check Action Status with PayU ID	`check_action_status`
Get transaction by txnid — Get Transaction Info API	`get_transaction_info`

Collect Payment endpoint: Same _payment URLs as PayU Hosted Checkout (modal wraps the hosted experience).
hash on _payment: Same family as hosted unless the Checkout Plus guide specifies additional fields — follow the Checkout Plus integration doc.
Post-service (command APIs) endpoint: POST https://info.payu.in/merchant/postservice.php?form=2
Post-service hash formula: sha512(key|command|var1|SALT)

EXAMPLE QUESTIONS