SignOps is a developer API for push notifications and login verification. Send push to Android, iOS and the web from your server, with topics, scheduling, templates and delivery logs. Approve a login with a push to a phone the user already trusts, using number matching and a biometric. Add passkeys on your own domain, or send and check email OTP codes. Every product uses your own user ids and one API key, and works next to Supabase Auth, Firebase Auth, Auth0 or your own login. Free for 1,000 push devices, 100 approvals a day and 10,000 passkey sign-ins a month. Paid plans start at Rs 499 a month, billed in rupees with a GST invoice. Docs: https://signops.dev/docs/ GitHub: https://github.com/signops-dev