Kylon Developer Docs

The Kylon proxy is the stable API surface for agents that need to call connected tools, model providers, or supported external data providers. All proxy endpoints share the same public contract:

Authenticate with a Kylon API key
Check workspace permissions and provider access
Attribute usage to the workspace and agent
Check credits before the request when required
Record request status, usage, and errors
Return provider-compatible responses where possible

Base URL

https://api.kylon.io

Proxy routes are mounted under:

/proxy

Main endpoint families

Family	Purpose
`/proxy/tools/*`	Search toolkits, start auth, inspect tools, execute connected tools, and proxy native toolkit requests
`/proxy/openai/*`	OpenAI-compatible chat, responses, and image endpoints
`/proxy/anthropic/*`	Anthropic Messages API
`/proxy/anthropic-vertex/*`	Anthropic Messages API through a supported hosted provider route
`/proxy/gemini/*`	Gemini-compatible model and media endpoints
`/proxy/cerebras/*`	Cerebras chat completions
`/proxy/openrouter/*`	OpenRouter chat completions (access to a wide range of third-party models)
`/proxy/elevenlabs/*`	ElevenLabs-compatible voice endpoints
`/proxy/apify/*`	Apify store, actors, runs, datasets, logs, aborts, and key-value records
`/proxy/apollo/*`	Apollo people, company, organization, and news endpoints
`/proxy/fastmoss/*`	FastMoss creator, shop, product, video, and live endpoints
`/proxy/flightradar24/*`	Flight position, summary, track, event, airline, and airport endpoints
`/proxy/logo-dev/*`	Logo lookup, search, and company description
`/proxy/places/*`	Places autocomplete, search, nearby, directions, details, photo, and resolve endpoints
`/proxy/scrapecreators/*`	Instagram and TikTok profile, post, video, search, song, comment, and transcript endpoints
`/proxy/seedance/*`	Seedance video generation endpoints

Typical tools workflow

Search toolkits          GET  /proxy/tools/search?keywords=gmail
Start auth               POST /proxy/tools/auth
User completes OAuth     Open returned redirect URL
Verify connection        GET  /proxy/tools/connections
Inspect tools            GET  /proxy/tools/toolkit/gmail
Execute tool             POST /proxy/tools/execute

Typical model proxy workflow

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": "Write a concise project update."
  }'

Proxy Authentication

API keys, headers, and request attribution.

Tools API

Toolkit search, auth, execution, native proxy, and upload endpoints.

Model APIs

OpenAI, Anthropic, Gemini, Cerebras, ElevenLabs, and OpenRouter proxy routes.

Billing

Credit checks and usage accounting.

Getting Started

Concepts

Tutorials

CLI

Connections

Proxy

Proxy Overview

Base URL

Main endpoint families

Typical tools workflow

Typical model proxy workflow

Proxy Authentication

Tools API

Model APIs

Billing

​Base URL

​Main endpoint families

​Typical tools workflow

​Typical model proxy workflow

​Related pages

Proxy Authentication

Tools API

Model APIs

Billing

Base URL

Main endpoint families

Typical tools workflow

Typical model proxy workflow

Related pages