> ## Documentation Index
> Fetch the complete documentation index at: https://docs.jiekou.ai/llms.txt
> Use this file to discover all available pages before exploring further.

> ## Agent Instructions
> JieKou AI model APIs are OpenAI-compatible. Base URL for users in mainland China (direct, no VPN): https://api.highwayapi.ai/openai; elsewhere: https://api.jiekou.ai/openai. Anthropic-compatible base URL: https://api.highwayapi.ai/anthropic or https://api.jiekou.ai/anthropic.
> Authenticate with `Authorization: Bearer <API_KEY>`; with Anthropic SDKs or Claude Code, pass the same key as `ANTHROPIC_AUTH_TOKEN`. Users create keys at https://jiekou.ai/settings/key-management. Never print or hardcode a real key.
> Get current model IDs from GET https://api.jiekou.ai/openai/v1/models instead of reusing model names from memory.

# Build with Interface AI

> Call large language and multimodal models on Interface AI. Choose a task below and make your first call quickly.

> [card] [Large language models](https://docs.jiekou.ai/en/docs/model/llm.md)
>
> OpenAI-compatible chat, reasoning, and function calling.

> [card] [Multimodal models](https://docs.jiekou.ai/en/docs/models/reference-nano-banana.md)
>
> Call image, video, and audio generation models.

## Before you run

* [Log in to Interface AI](https://jiekou.ai/user/login).
* [Create an API key](https://jiekou.ai/settings/key-management).
* [Keep enough balance in your account](https://jiekou.ai/billing).

> [accordion] Use with your agent
>
> **If your agent supports skills, install with:**
>
> ```bash theme={null}
> npx skills add jiekouai/jiekou-skills --skill jiekou-docs
> ```
>
> **MCP (Model Context Protocol):**
>
> Click the **MCP installation entry** in the upper-right corner of the page and follow the guide to complete one-click installation. No manual configuration is required.

## Explore

> [card] [Model service introduction](https://docs.jiekou.ai/en/docs/model/overview.md)
>
> Learn what Interface AI model services offer and how to use them.

> [card] [API authentication](https://docs.jiekou.ai/en/docs/models/reference-authentication.md)
>
> Authenticate requests with your API key.

> [card] [API error codes](https://docs.jiekou.ai/en/docs/models/reference-error-code.md)
>
> Troubleshoot calls using the returned error codes.

> [card] [Third-party tool setup](https://docs.jiekou.ai/en/docs/integration/cc-switch.md)
>
> Connect Interface AI to CC Switch, Claude Code, Codex, and more.

> [card] [Billing management](https://docs.jiekou.ai/en/docs/support/bill.md)
>
> View bills and manage costs and usage records.


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