List every supported gateway with a one-line summary, whether credentials are configured, and the feature support matrix.

Full capability map for one gateway: features (supported / partial / not_implemented / unsupported), payment methods, required env vars, hard constraints, official SDKs and platform plugins (Shopify, WooCommerce).

Doctor: shows the mode and which environment variables are present or missing per gateway. Never returns secret values.

Rank gateways for a use case using the capability map (e.g. subscriptions, international payments, Shopify, lowest integration effort).

Create an order / payment session. Returns checkout, which tells the frontend what to do: js_sdk (load script + options), redirect (send the browser to url), form_post (auto-submit a form with fields), or manual. Persist orderRef + providerOrderId.

Verify the payload the browser/app received after checkout (Razorpay handler response, PayU/CCAvenue/Paytm POST-back, etc.). Fulfil ONLY when paid=true. valid=true just means the callback is genuine; a genuine failure is still valid. For gateways that do not sign callbacks it confirms through the status API.

Fetch the authoritative payment status from the gateway (source of truth for reconciliation).

Refund all or part of a captured payment. refund_ref is the idempotency key: re-sending it after a success returns the same refund. If a call fails with OUTCOME_UNKNOWN, check payments_get_refund_status / payments_get_status BEFORE retrying. In live mode this moves real money: ask the human first, then pass confirm=true.

Fetch refund status from the gateway.

Verify a webhook signature and normalise it into a common event (payment.succeeded, refund.processed, ...). Pass the RAW body string exactly as received.

Produce a correctly signed webhook (headers + raw body) for local testing. In sandbox mode it uses the provider's real signing scheme and your webhook secret; replay it with curl against your LOCAL endpoint. Disabled in live mode. Never reuse sandbox webhook secrets in production.

Create a customer record on gateways that have one (Razorpay, Stripe).

Create a recurring subscription (UPI Autopay / card e-mandate). Returns a checkout action the customer must complete to authorise the mandate.

Cancel a subscription now or at cycle end. Live mode requires confirm=true after human approval.

List settlements (payouts from the gateway to your bank) for reconciliation.

Generate a working, production-shaped integration for a project: server routes (create order, verify callback, webhook), client checkout code, env template and a test checklist. Returns files with paths and contents for the agent to write.

MOCK MODE ONLY. Simulate the customer finishing checkout. Returns a signed callback payload (feed it to payments_verify_payment) and the updated payment.