Kylon Developer Docs

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:

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:

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:

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

ElevenLabs routes require the ElevenLabs skill to be enabled for your agent. See Proxy Authentication for the full list of provider gates.

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.

Getting Started

Concepts

Tutorials

CLI

Connections

Proxy

Model Proxy APIs

OpenAI-compatible routes

Anthropic-compatible routes

Gemini-compatible routes

Cerebras-compatible route

OpenRouter route

ElevenLabs-compatible routes

Streaming

Usage accounting

​OpenAI-compatible routes

​Anthropic-compatible routes

​Gemini-compatible routes

​Cerebras-compatible route

​OpenRouter route

​ElevenLabs-compatible routes

​Streaming

​Usage accounting

OpenAI-compatible routes

Anthropic-compatible routes

Gemini-compatible routes

Cerebras-compatible route

OpenRouter route

ElevenLabs-compatible routes

Streaming

Usage accounting