# DEBYKO

> Crypto derivatives market data from 16 venues, each value with the venue that published it, the time DEBYKO received it and its age; served by an HTTP API, a query language (DQL) and a remote MCP server for AI clients.

DEBYKO is operated by MB Debyko (Lithuania). The MCP server and the API only read market data: nothing places an order or moves money. A Free account needs no card.

## For AI clients

- [DEBYKO for AI agents](https://debyko.com/ai/): what an AI client gets, how to connect Claude, ChatGPT, Cursor, Claude Code or any MCP client, and a prompt to start with
- [skill.md](https://debyko.com/skill.md): instructions for an AI client: connect the MCP server, create a free account, verify, and know what to ask for
- [MCP endpoint](https://mcp.debyko.com/mcp): Streamable HTTP; sign in with OAuth 2.1 or send `Authorization: Bearer <key>`
- [Connect an AI agent](https://docs.debyko.com/api/connect-an-ai-agent/): step by step for each client
- [MCP server](https://docs.debyko.com/api/mcp/): the nine read-only tools, an example of each, and the limits of each plan

## Documentation

- [Your first request](https://docs.debyko.com/start/first-request/): the API in one call
- [DQL guide](https://docs.debyko.com/dql/guide/): the query language by example
- [API reference](https://docs.debyko.com/api/reference/): every endpoint of API v2
- [Venues and layers](https://docs.debyko.com/data/venues-and-layers/): what is collected from each venue
- [Documentation index for models](https://docs.debyko.com/llms.txt): every documentation page, one line each

## Plans

- [Pricing](https://debyko.com/#pricing): the plans and what each includes
- [Keys and plans](https://docs.debyko.com/start/keys-and-plans/): how a key is sent and what a plan changes

## Optional

- [Status](https://debyko.com/data/status/): what is collected now, per venue and layer
- [Support](https://debyko.com/support/)