# Nuwa AI Documentation

## Docs

- [Artifact](https://docs.nuwa.dev/build-caps/artifact.md): Integrate an Artifact UI panel to enable more functionality with your Cap.
- [Use Nuwa Client](https://docs.nuwa.dev/build-caps/build-ui.md): Integrate Nuwa Client functions into your UI
- [LLM Gateway](https://docs.nuwa.dev/build-caps/llm-gateway.md): Deploy your own LLM Gateway to unify multiple providers with DID authentication and usage-based pricing
- [MCP](https://docs.nuwa.dev/build-caps/mcp.md): Overview and choices for building or proxying MCP with Nuwa
- [MCP Proxy](https://docs.nuwa.dev/build-caps/mcp-proxy.md): Set up your existing MCP server with a Nuwa MCP Proxy to start accepting payments
- [MCP Server](https://docs.nuwa.dev/build-caps/mcp-server.md): Build a Nuwa-Compatible pay‑per‑call MCP server
- [MCP UI](https://docs.nuwa.dev/build-caps/mcp-ui.md): Return UI resource from MCP tools
- [Models](https://docs.nuwa.dev/build-caps/models.md): About Models in Nuwa
- [Prompt](https://docs.nuwa.dev/build-caps/prompt.md): Set the Prompt for your Cap
- [Quickstart](https://docs.nuwa.dev/build-caps/quickstart.md): Launch your first Cap with the Nuwa Client
- [Revenue](https://docs.nuwa.dev/build-caps/revenue.md): View balances, withdraw funds, and audit revenue history for your services
- [Service Key](https://docs.nuwa.dev/build-caps/service-key.md): Obtain and configure SERVICE_KEY for your Nuwa-compatible services
- [Service Pricing](https://docs.nuwa.dev/build-caps/service-pricing.md): Pricing for your models and MCP tools
- [Overview](https://docs.nuwa.dev/build-caps/ui.md): Ways to add interactive UI to your Cap: Artifact UI and MCP UI.
- [Deploy LLM Gateway on Railway](https://docs.nuwa.dev/guides/deploy-llm-gateway-railway.md): Complete guide to deploying Nuwa LLM Gateway on Railway platform with DID authentication and usage-based pricing
- [Deploy MCP Server Proxy on Railway](https://docs.nuwa.dev/guides/deploy-mcp-proxy-railway.md): Complete guide to deploying Nuwa MCP Server Proxy on Railway platform with DID authentication and paid tool calls
- [DIDAuth Integration Guides](https://docs.nuwa.dev/guides/did-auth.md): A single entry point for DIDAuth integration on agent and backend sides.
- [DIDAuth for Agent](https://docs.nuwa.dev/guides/did-auth-agent.md): Use nuwa-id and did-check to run a practical DIDAuth flow in agent environments.
- [DIDAuth for Backend Services](https://docs.nuwa.dev/guides/did-auth-server.md): Integrate DIDAuthV1 verification in your backend using @nuwa-ai/identity-kit.
- [From Documentation to Revenue: Building Paid Knowledge Services with Nuwa LLM Gateway](https://docs.nuwa.dev/guides/llm-gateway-knowledge-service.md): Complete tutorial on building professional Q&A services using OpenAI File Search and Nuwa NIP documentation
- [Capabilities (Caps)](https://docs.nuwa.dev/introduction/core-concepts/capabilities.md): About AI Capabilities (Caps) in Nuwa
- [Decentralized Identity](https://docs.nuwa.dev/introduction/core-concepts/identity.md): About Decentralized Identity in Nuwa
- [Payment](https://docs.nuwa.dev/introduction/core-concepts/payment.md): About Payment in Nuwa
- [Nuwa AI](https://docs.nuwa.dev/introduction/nuwa-ai.md): Economy Layer for AI
- [Why Nuwa AI?](https://docs.nuwa.dev/introduction/why-nuwa.md): Because we believe in the power of community and the future of AI
- [Cap Kit](https://docs.nuwa.dev/sdk/cap-kit.md): About Nuwa Cap Kit
- [Identity Kit](https://docs.nuwa.dev/sdk/identity-kit.md): About Nuwa Identity Kit
- [Nuwa Kit](https://docs.nuwa.dev/sdk/index.md): About Nuwa Kit
- [Payment Kit](https://docs.nuwa.dev/sdk/payment-kit.md): About Nuwa Payment Kit
- [UI Kit](https://docs.nuwa.dev/sdk/ui-kit.md): About Nuwa UI Kit
- [ERC8004 Integration](https://docs.nuwa.dev/xnuwa/erc8004.md): How xNUWA uses ERC8004 for on-chain registration and discovery of AI agents.
- [xNUWA](https://docs.nuwa.dev/xnuwa/overview.md): Explore the xNUWA client for using x402-enabled AI services.
- [@nuwa-ai/x402 SDK](https://docs.nuwa.dev/xnuwa/sdk.md): Helpers for paid MCP endpoints and x402-gated HTTP proxies.
- [What is x402?](https://docs.nuwa.dev/xnuwa/x402.md): Learn how the x402 payments protocol activates HTTP 402 for instant, web-native crypto payments.
- [MCP with x402](https://docs.nuwa.dev/xnuwa/x402-mcp.md): Protect Next.js-hosted MCP tools with x402 receipts.