The Capture App is free for local capture. Pay-as-you-go API access is enabled after manual UPI payment review.
For everyone who needs to capture proof. No account, no card, no limits.
Download the appFor teams integrating Kist into their own product. The console, API keys and hosted verification unlock after a one-time verification payment that is refunded to you.
Sign inFor high-volume verification, dedicated capacity, and compliance requirements.
Contact usEvery anchor and verification deducts credits as it happens — no reservation, no minimum.
Metered usage is recorded against your client id in real time and visible in the console.
At the end of the monthly cycle you settle only for the credits you actually consumed.
| Operation | Endpoint | Billing |
|---|---|---|
| Anchor | POST /anchor | credits per successful anchor |
| Batch anchor | POST /anchor/batch | credits per record |
| Verify | POST /verify | credits per verification |
| Capture | Capture App | Free |
Yes. Capturing, signing, and anchoring proof from the app is free for everyone. Metering applies only when your own backend calls the hosted API with an API key.
Successful anchors, batch records, and verifications made through the developer API. The Capture App's own anchors are free.
Sign in, then complete the one-time verification payment shown in the console. The amount is an authorization check — pay it by UPI QR or any UPI app, and it is refunded to you once the payment is matched. A billed account that goes unpaid for a full monthly cycle is suspended until it renews.
No. Anchoring is idempotent: re-anchoring the same image hash for the same client returns the existing record. Failed chain submissions are retried without extra charge.
Yes. GET /credits/balance, /credits/usage and /credits/transactions expose your balance and every metered event, and the console shows the same data.