# DEBYKO > DEBYKO documentation: crypto derivatives data from 19 venues and 719 collected listings in one query language, each value with its venue, receipt time and age. Documentation of the DEBYKO API v2 and DQL, its query language. This file is generated from the pages of the site when it is built. ## Start - [What DEBYKO is](https://docs.debyko.com/start/what-debyko-is/): Crypto derivatives data from every venue that quotes an instrument. Stored as published. Sealed daily on Base. - [Without a key](https://docs.debyko.com/start/without-a-key/): What you can read before you decide to pay for anything. - [Your first request](https://docs.debyko.com/start/first-request/): A request that needs no key and returns real data, in one line. - [Keys and plans](https://docs.debyko.com/start/keys-and-plans/): How a key is sent, and what a plan changes. - [Venues in DQL](https://docs.debyko.com/start/venues/): Every venue a query can name, read from the platform when this page was built. ## AI agents - [DEBYKO for AI agents](https://docs.debyko.com/ai/): What an AI client connected to DEBYKO can do, how to connect Claude, ChatGPT, Cursor or Claude Code, a prompt to start with, and the limits. - [Getting started with an AI client](https://docs.debyko.com/ai/getting-started/): A free account, an AI client connected to the DEBYKO MCP server, Telegram linked, a first alert, its firings and how to stop it. - [Alerts from an AI client](https://docs.debyko.com/ai/alerts/): How an AI client sets up an Agent alert with you, and the same rule by hand at agent.debyko.com: channels, rules, notifications, limits. - [MCP tools](https://docs.debyko.com/ai/mcp-tools/): Every tool of the DEBYKO MCP server with its arguments and annotations, the resources it serves and its prompts, generated from the server. - [MCP errors](https://docs.debyko.com/ai/errors/): Every error code an AI client can get from DEBYKO, what to do about it and whether to retry, generated from the server. - [Crypto futures data and alerts in Claude](https://docs.debyko.com/ai/claude/): Connect Claude to DEBYKO as a custom connector: funding rates, open interest and alerts in Telegram, from 19 venues. Free account, no card. - [Crypto futures data and alerts in ChatGPT](https://docs.debyko.com/ai/chatgpt/): Connect ChatGPT to DEBYKO as a custom MCP server: funding rates, open interest and alerts in Telegram, from 19 venues. Free account, no card. - [Crypto futures data and alerts in Cursor](https://docs.debyko.com/ai/cursor/): Connect Cursor to the DEBYKO MCP server: the install link, or mcp.json, then sign in with your DEBYKO account. - [Crypto futures data and alerts in Claude Code](https://docs.debyko.com/ai/claude-code/): Connect Claude Code to the DEBYKO MCP server with one command, then sign in with your DEBYKO account. - [Crypto futures data and alerts in Codex](https://docs.debyko.com/ai/codex/): Connect OpenAI's Codex to the DEBYKO MCP server: add it as a streamable HTTP server, then log in with your DEBYKO account. ## DQL - [The guide](https://docs.debyko.com/dql/guide/): DQL by example, every answer produced by the engine. - [Syntax](https://docs.debyko.com/dql/syntax/): The whole language on one page: grammar, a query and a real answer for each part of it. - [Fields and functions](https://docs.debyko.com/dql/reference/): Every name a query may use, each with a query that reads it and the value it returned. - [Cookbook](https://docs.debyko.com/dql/cookbook/): Queries that answer a question somebody actually has. - [How the language behaves](https://docs.debyko.com/dql/corpus/): The conformance corpus: every case the engine is held to on every build. - [Decided and not yet](https://docs.debyko.com/dql/not-yet/): What the language has settled, deferred and will not do. - [Changelog](https://docs.debyko.com/dql/changelog/): How DQL changed, set by set. - [Selecting with DQL](https://docs.debyko.com/dql/selecting/): How the data endpoints choose which listings to answer for. ## API v2 - [Reference](https://docs.debyko.com/api/reference/): Every endpoint, its schema and its examples, from the document the API itself publishes. - [Endpoints](https://docs.debyko.com/api/endpoints/): What each endpoint answers, what it takes and what it refuses. - [Limits and batches](https://docs.debyko.com/api/limits/): What one query may be, and what one request may ask for. - [Errors](https://docs.debyko.com/api/errors/): Every code, with an input that produces it and the message the parser gives. - [Migrating from exchange APIs](https://docs.debyko.com/api/migrating/): The differences that actually cost you time, and what the platform will not do. - [Pay with USDC](https://docs.debyko.com/api/pay-with-usdc/): Read the data without an account, or buy a plan for 30 days: one USDC payment on Base, what the 402 looks like, what you get back, and how to poll the state of your Agent rules. - [Paying per call with x402](https://docs.debyko.com/api/x402/): Read the data without an account: one USDC payment on Base per request, what it costs, what is payable and what happens when something goes wrong. - [Connect an AI agent](https://docs.debyko.com/api/connect-an-ai-agent/): Give an AI agent the DEBYKO data as tools: one URL, signed in with your DEBYKO account or with your key, nothing to install. - [MCP server](https://docs.debyko.com/api/mcp/): The DEBYKO MCP server: endpoint, sign-in with OAuth or a key, the 11 read-only tools with examples, the 6 Agent tools for alerts, and the limits of each plan. - [Use DEBYKO from AgentKit](https://docs.debyko.com/api/agentkit/): Call DEBYKO from a Coinbase AgentKit agent: the built-in x402 provider already pays, and a typed provider adds descriptions, DQL guidance and a per-call cap. - [Arena for bots](https://docs.debyko.com/api/arena/): Report your own closed positions and open snapshots with your DEBYKO key; reproducible P&L percentages and tape corroboration. ## Data - [Venues and layers](https://docs.debyko.com/data/venues-and-layers/): What the platform collects, layer by layer, and what each layer holds. - [Statuses and reasons](https://docs.debyko.com/data/statuses/): The five statuses of a value and every reason it can be null or stale, each with an example answer. - [Freshness and cadence](https://docs.debyko.com/data/freshness/): How long each value is good for, what it rests on, and why a stale value is not returned as a value. - [Archive](https://docs.debyko.com/data/archive/): Observed trades and sampled market history as Parquet files, one per listing, layer and UTC day: how to list, fetch, read and verify them. - [Retention](https://docs.debyko.com/data/retention/): How far back a question can be asked. - [Check it yourself](https://docs.debyko.com/data/check-it-yourself/): Five requests that show how long each value is good for, what happens when it is not, and that the past is not rewritten. - [Identity over time](https://docs.debyko.com/data/identity-over-time/): How a venue symbol maps to an asset and market at a past instant, and how to read reconstructed mappings. - [Funding normalisation](https://docs.debyko.com/data/funding-normalisation/): How a venue's funding rate, interval and unit become a rate over 8 hours: the rule, why 1h and 8h differ, and for each venue the rate field and how its interval is known. - [Funding settlements](https://docs.debyko.com/data/funding-settlements/): GET /v2/funding/settlements: one row per settlement print of a listing, how a print is recorded live venue by venue, the backfill from each venue's history, and the interval cross-check. - [Embed funding across venues](https://docs.debyko.com/data/funding-widget/): An iframe or script widget: current funding across venues, on one eight-hour basis. No key, cookies or tracking scripts. - [Venues](https://docs.debyko.com/data/venues/): Every venue code, its market kind and funding mode, the host of the venue's own public API and the requests DEBYKO makes there. - [Point in time](https://docs.debyko.com/data/point-in-time/): What a past-instant question means, how the received-time cut-off works, what a revision is, and how gaps come back: reading what DEBYKO knew at a past instant. ## Agent - [Agent](https://docs.debyko.com/agent/): What Agent does, why it is a client and not an endpoint, and what it deliberately does not watch. - [Rules and channels](https://docs.debyko.com/agent/rules-and-channels/): Configure DQL rules and notifications in Agent. - [Webhook payload](https://docs.debyko.com/agent/webhook/): Agent event fields, stable firing IDs, signatures, retries and test deliveries. ## Studio and plans - [Studio & plans](https://docs.debyko.com/plans/): Tiers, keys and billing. ## Arena - [Arena: what it is](https://docs.debyko.com/arena/): A public record of participants’ own trading and opt-in DQL rules. - [Public rules](https://docs.debyko.com/arena/public-rules/): Explicitly published Agent rules and their recorded firings in Arena. ## Attest - [Verify an anchor](https://docs.debyko.com/attest/verify/): How a row of DEBYKO history is proved to be under a Merkle root posted on Base, and a verifier that needs nothing but SHA-256.