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# 👨💻 Developers

### What can you build with Ocean?

1. **Token-gated dApps & REST APIs**: monetize by making your dApp or its REST API token-gated. [Here's how](https://github.com/oceanprotocol/token-gating-template).
1. **AI dApps**: monetize your AI dApp by token-gating on AI training data, feature vectors, models, or predictions.
1. **Data Markets**: build a decentralized [data market](../developers/build-a-marketplace/README.md).
1. **Private user profile data**: storing user profile data on your centralized server exposes you to liability. Instead, have it on-chain encrypted by the user's wallet, and just-in-time decrypt for the app. [Video](https://www.youtube.com/watch?v=xTfI8spLq1k&ab_channel=ParticleNetwork), [slides](https://docs.google.com/presentation/d/1_lkDVUkA0Rx1R7RpkaSeLkX3PeOBoMQyRhvxjwTvd6A/edit?usp=sharing).

Example live dapps:
- **Data Markets**: [Acentrik Market](https://market.acentrik.io/) for enterprises, and [Ocean Market](https://market.oceanprotocol.com) for general.
- **Token-gated dapps**: [Autobot](https://autobotocean.com/) for analytics, and [Ocean Waves](https://waves.oceanprotocol.com/) for music.
- **Token-gated feeds**: [Ocean Predictoor](https://predictoor.ai) for AI prediction feeds

### How do developers start using Ocean?

- **App level: [Use an Ocean Template](https://oceanprotocol.com/templates)**.
- **Library level: [Use ocean.js](ocean.js/README.md)** is a library built for the key environment of dApp developers: JavaScript. Import it & use it your frontend or NodeJS.
- **Contract level: [Call Ocean contracts](contracts.md)** on Eth mainnet [or other chains](../discover/networks.md).

### Developer Docs Quick-links

- [Architecture](architecture.md) - blockchain/contracts layer, middleware, dapps
- Earning revenue: [code to get payment](revenue.md), [fractional $](fractional-ownership.md), [community $](community-monetization)
- Schemas: [Metadata](metadata.md), [identifiers/DIDs](identifiers.md), [identifier objects/DDOs](ddo-specification.md), [storage](storage.md), [fine-grained permissions](fg-permissions.md)
- Components:
  - [Barge](barge.md) - local chain for testing
  - [Ocean subgraph](subgraph.md) - grabbing event data from the chain
  - [Ocean CLI](ocean-cli.md) - command-line interface
  - [Compute-to-data](compute-to-data.md) - practical privacy approach
  - [Aquarius](aquarius.md) - metadata cache
  - [Provider](provider.md) - handshaking for access control
- [FAQ](faq.md) 

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_Next: [Architecture](architecture.md)_