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

# Model Proxy APIs

> Call supported model providers through the Kylon proxy.

Kylon exposes provider-compatible model routes under `/proxy`. Use the same Kylon API-key authentication as other proxy calls.

## OpenAI-compatible routes

| Method | Path                                  | Notes                                                     |
| ------ | ------------------------------------- | --------------------------------------------------------- |
| `POST` | `/proxy/openai/v1/chat/completions`   | Chat Completions-compatible requests, including streaming |
| `POST` | `/proxy/openai/v1/responses`          | Responses API-compatible requests, including streaming    |
| `POST` | `/proxy/openai/v1/images/generations` | Image generation                                          |
| `POST` | `/proxy/openai/v1/images/edits`       | Image edits with JSON or multipart form data              |

Example:

```bash theme={null}
curl -s https://api.kylon.io/proxy/openai/v1/responses \
  -H "x-api-key: pak_your_key_here" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gpt-4o",
    "input": "Summarize this customer request in one paragraph."
  }'
```

## Anthropic-compatible routes

| Method | Path                                  | Notes                                                            |
| ------ | ------------------------------------- | ---------------------------------------------------------------- |
| `POST` | `/proxy/anthropic/v1/messages`        | Anthropic Messages-compatible requests, including streaming      |
| `POST` | `/proxy/anthropic-vertex/v1/messages` | Same request shape through an alternate supported provider route |

Example:

```bash theme={null}
curl -s https://api.kylon.io/proxy/anthropic/v1/messages \
  -H "x-api-key: pak_your_key_here" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "claude-sonnet-4-6",
    "max_tokens": 512,
    "messages": [{"role": "user", "content": "Draft a concise launch note."}]
  }'
```

## Gemini-compatible routes

| Method | Path                                      | Notes                            |
| ------ | ----------------------------------------- | -------------------------------- |
| Any    | `/proxy/gemini`                           | Gemini proxy root                |
| Any    | `/proxy/gemini/*`                         | Gemini-compatible upstream paths |
| `POST` | `/proxy/gemini/files/upload-urls`         | Upload URL helper                |
| `POST` | `/proxy/gemini/file-understanding`        | File understanding helper        |
| `POST` | `/proxy/gemini/video-audio-understanding` | Video/audio understanding helper |

## Cerebras-compatible route

| Method | Path                                  | Notes                                |
| ------ | ------------------------------------- | ------------------------------------ |
| `POST` | `/proxy/cerebras/v1/chat/completions` | Chat Completions-compatible requests |

## OpenRouter route

| Method | Path                                    | Notes                                                          |
| ------ | --------------------------------------- | -------------------------------------------------------------- |
| `POST` | `/proxy/openrouter/v1/chat/completions` | Chat Completions-compatible requests routed through OpenRouter |

Use the OpenRouter route to access a broad catalog of third-party models with a single Kylon API key.

Example:

```bash theme={null}
curl -s https://api.kylon.io/proxy/openrouter/v1/chat/completions \
  -H "x-api-key: pak_your_key_here" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "moonshotai/kimi-k2",
    "messages": [{"role": "user", "content": "Hello from Kylon."}]
  }'
```

## ElevenLabs-compatible routes

| Method | Path                  | Notes                                |
| ------ | --------------------- | ------------------------------------ |
| Any    | `/proxy/elevenlabs`   | ElevenLabs proxy root                |
| Any    | `/proxy/elevenlabs/*` | ElevenLabs-compatible upstream paths |

<Note>
  ElevenLabs routes require the ElevenLabs skill to be enabled for your agent. See [Proxy Authentication](/proxy/authentication) for the full list of provider gates.
</Note>

## Streaming

OpenAI-compatible, Anthropic-compatible, Gemini-compatible, Cerebras-compatible, and OpenRouter routes support streaming where the provider route supports it. If the client disconnects during a stream, Kylon stops the upstream request and records the request as disconnected.

## Usage accounting

Model routes compute credits from usage when provider usage data is available. See [Proxy Billing](/proxy/billing).