Web3Auth Agent Skills

Agent skill for MetaMask Embedded Wallets (Web3Auth). Gives AI coding agents SDK selection, authentication flows, key derivation rules, platform quirks, and migration tripwires — the parts that are easy to get wrong even when the docs are open.

Follows the Agent Skills format.

Install

npx skills add web3auth/skill -y

Works with Cursor, Claude Code, Copilot, Cline, Codex, Windsurf, and 40+ more agents.

npx skills add web3auth/skill -g -y              # global (all projects)
npx skills add web3auth/skill -a cursor -y       # Cursor only
npx skills add web3auth/skill -a claude-code -y  # Claude Code only

This repository ships one skill: web3auth. The CLI installs everything under skills/web3auth/.

What it covers

• SDK selection (web modal, React Native, Flutter, native mobile, Node.js)
• Social login, custom JWT (Firebase, Auth0, Cognito), grouped connections
• Dashboard setup (Client ID, Sapphire devnet/mainnet, connections)
• Migrations (web v11, RN v9, legacy PnP/CoreKit/Torus)
• Common failures (different addresses per login method, JWT iat, v11 connection API)

Pair with the MCP server

The skill teaches routing and tripwires. The MCP server provides live docs, examples, and SDK source — use both together.

{
  "mcpServers": {
    "web3auth": {
      "url": "https://mcp.web3auth.io"
    }
  }
}

Setup guide: web3auth-mcp

Repository layout

skills/
└── web3auth/
    ├── SKILL.md              # Main skill (loaded by agents)
    ├── references/           # Platform, auth, migration, example routing
    └── evals/                # Maintainers: regression prompts (not required at runtime)

Maintainers

To improve this skill with evals and benchmarks, use Anthropic's skill-creator in a separate clone or add it locally:

npx skills add anthropics/skills --skill skill-creator -y

Keep local benchmark output out of git (see .gitignore). Run web3auth/evals/ against your skill changes before publishing.

License

See skill content and upstream dependencies as applicable. Web3Auth / MetaMask Embedded Wallets documentation is subject to MetaMask developer terms.