> For the complete documentation index, see [llms.txt](https://docs.onyx.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.onyx.org/developer-guide.md).

# Developer Guide

- [Getting Started](https://docs.onyx.org/developer-guide/getting-started.md): Connect EVM tooling to Onyx Mainnet safely.
- [Network Fees](https://docs.onyx.org/developer-guide/network-fees.md): Understand how Onyx network fees are priced, calculated, and converted between XCN and USD.
- [Exchange Integration Guide](https://docs.onyx.org/developer-guide/exchange-integration.md): Current integration guide for exchanges, custodians, and wallet backends.
- [XCN Decimal Handling](https://docs.onyx.org/developer-guide/decimal-handling.md): Correctly convert native XCN between ledger and JSON-RPC units.
- [Lazy Account Creation](https://docs.onyx.org/developer-guide/lazy-create-gas.md): Estimate gas correctly when a transfer creates its destination account.
- [Deploying Contracts](https://docs.onyx.org/developer-guide/deploying-contracts.md): Deploy and verify Solidity contracts on Onyx Mainnet.
- [Bridge Integration](https://docs.onyx.org/developer-guide/bridge.md): Integrate the Onyx bridge without hardcoding mutable limits or operator addresses.
- [REST API Reference](https://docs.onyx.org/developer-guide/bridge/api-reference.md): Public bridge REST endpoints and dynamic discovery rules.
- [Smart Account Integration](https://docs.onyx.org/developer-guide/bridge/smart-account-integration.md): ERC-1271 and ERC-4337 requirements for native-XCN bridge intents.
- [Network Architecture](https://docs.onyx.org/developer-guide/overview.md): High-level deployed architecture of Onyx Mainnet.


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