# Nevermined > Payments infrastructure for AI agents. Monetize APIs, agents, MCP servers, > and content with usage-based pricing and a delegated card via the x402 > standard. ## What's here This file is the entry point to Nevermined's agent-discoverable surface. The **Registry** below lists APIs that accept autonomous agent payments via Nevermined's x402 card-delegation scheme. The rest is reference material about Nevermined itself. For SDK and API documentation, see the [docs index](https://nevermined.ai/docs/llms.txt). ## Registry of agent-payable APIs APIs that accept payment from autonomous agents via Nevermined's x402 card delegation. Agents holding a delegated card can buy or top up access without a human in the loop. ### Exa - Category: Search / retrieval API - Scheme: `nvm:card-delegation` - Unit: $7 buys an Exa API key with $7 of credits. Top-ups via same endpoint, same key. - Integration details: [exa.ai/docs/integrations/nevermined.md](https://exa.ai/docs/integrations/nevermined.md) This registry is open. If you're an API provider and want to be listed, see the [API Providers use case](https://nevermined.ai/use-cases/api-providers/) ([md mirror](https://nevermined.ai/use-cases/api-providers.md)) and the [full integration guide in our docs](https://nevermined.ai/docs/solutions/api-providers), then get in touch. ## Pages - [Home](https://nevermined.ai/): Monetize every AI agent, instantly. - [Product](https://nevermined.ai/product/): Payments infrastructure for AI agents. Register, price, accept, settle, track. - [Facilitator](https://nevermined.ai/facilitator/): The x402 facilitator that verifies and settles agent payments. - [About](https://nevermined.ai/about-us/): Team and mission. - [Stripe vs Nevermined](https://nevermined.ai/compare/stripe-vs-nevermined/): Comparison of agent-payment approaches. ## Solutions - [NVM Pay](https://nevermined.ai/solutions/nvm-pay/): Card-delegation app. Enroll a card, delegate spend to an agent. - [Visa partnership](https://nevermined.ai/solutions/visa/): Virtual cards for AI agents via Visa Intelligent Commerce + x402. - [OpenClaw](https://nevermined.ai/solutions/openclaw/): Open standard for agent commerce. ## Use cases - [API Providers](https://nevermined.ai/use-cases/api-providers/) ([md mirror](https://nevermined.ai/use-cases/api-providers.md), [docs](https://nevermined.ai/docs/solutions/api-providers)): Let AI agents buy and top up your API autonomously via x402 card delegation. - [AI Crawlers](https://nevermined.ai/use-cases/ai-crawlers/): Paid access for bots and agents. Charge for content at internet scale. - [Builder Platforms](https://nevermined.ai/use-cases/builder-platforms/): Take a cut of every transaction your builders process. ## Glossary - [x402](https://nevermined.ai/glossary/x402/): The HTTP `402 Payment Required` protocol for agent payments. - [Agentic Commerce](https://nevermined.ai/glossary/agentic-commerce/): What it means for agents to transact. - [Agent Payments](https://nevermined.ai/glossary/agent-payments/): Overview of payment patterns for AI agents. ## Reference - [SDK + API docs index](https://nevermined.ai/docs/llms.txt) - [API Providers integration guide (docs)](https://nevermined.ai/docs/solutions/api-providers) - [x402 card-delegation spec](https://nevermined.ai/docs/specs/x402-card-delegation) - [API provider integration template](https://nevermined.ai/integrations/api-provider-template.md) - [Nevermined App](https://nevermined.app/): dashboard, plans, API keys, card enrollment. - [Contact](https://nevermined.ai/contact-us/) - [GitHub](https://github.com/nevermined-io)