# Understanding SlinkyLayer

- [Introduction to SlinkyLayer](https://docs.slinky.network/understanding-slinkylayer/introduction-to-slinkylayer.md): Infrastructure for pay-per-call AI and APIs
- [How SlinkyLayer works](https://docs.slinky.network/understanding-slinkylayer/how-slinkylayer-works.md)
- [Machine-to-Machine Commerce](https://docs.slinky.network/understanding-slinkylayer/machine-to-machine-commerce.md)
- [SlinkyLayer vs Web2 API Marketplaces](https://docs.slinky.network/understanding-slinkylayer/slinkylayer-vs-web2-api-marketplaces.md)
- [What makes SlinkyLayer different](https://docs.slinky.network/understanding-slinkylayer/slinkylayer-vs-web2-api-marketplaces/what-makes-slinkylayer-different.md)
- [x402 Payment Rail](https://docs.slinky.network/understanding-slinkylayer/x402-payment-rail.md)
- [User Groups](https://docs.slinky.network/understanding-slinkylayer/user-groups.md)


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