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

# Interfaces

- [Overview](https://docs.nexus.xyz/interfaces/interfaces.md): Programmatic access to the Nexus Exchange — OpenAPI spec, SDKs, CLI, and MCP.
- [Networks](https://docs.nexus.xyz/interfaces/networks.md): How every Nexus Exchange interface selects a network — testnet, mainnet, local, or a custom target you describe yourself.
- [Rate Limits](https://docs.nexus.xyz/interfaces/rate-limits.md): What a request costs, what the rate-limit headers mean, which budgets are independent of which, and what happens when you exceed each.
- [Portfolio & Account State](https://docs.nexus.xyz/interfaces/portfolio.md): Consolidated account state, withdrawable balance, fee schedule, enriched positions, and the portfolio time-series — across the SDKs and CLI.


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