# Totp

> TOTP (RFC 6238) time-based one-time password reference. Covers algorithm internals, Python pyotp/Node.js otpauth/Go implementation, otpauth:// URI format, QR code generation, backup codes, rate limiting, security best practices, and database schema.

- Skill: `bytesagain/totp` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add bytesagain/totp`
- Raw SKILL.md: https://api.skillmd.com/api/skills/bytesagain/totp/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Security
- Author: bytesagain (https://skillmd.com/u/bytesagain)
- Updated: 2026-09-21
- Page: https://skillmd.com/skills/bytesagain/totp

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# TOTP Reference

Time-based one-time passwords.

## Commands

| Command | Description |
|---------|-------------|
| `intro` | How it works, apps |
| `implement` | Python/Node.js/Go code |
| `security` | Best practices, backup codes |