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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

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Base URL

https://api.kylon.io
Proxy routes are mounted under: 
/proxy

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Main endpoint families

FamilyPurpose
/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

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Typical tools workflow

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

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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.