big xyt
big xyt AG (now branded simply xyt, with big-xyt.com redirecting to xyt.one) is an independent, majority employee-owned market data analytics firm headquartered in Frankfurt am Main, Germany. It sells tick-data-driven market intelligence covering equities, ETFs, listed derivatives, FX, and fixed income across 120+ venues, processing 12bn+ messages per day with roughly ten years of history at nanosecond precision and market-by-order granularity. Products include the Liquidity Cockpit (market share and liquidity analytics), Transaction Cost Analysis against its SMART benchmark, pre-trade cost modeling, a Datashop of analysis-ready datasets and APIs, and an xyt AI natural-language query layer. Three API products are publicly named - the big xyt API, Liquidity Cockpit API, and TCA API - but their reference documentation sits behind a login at docs.big-xyt.com (HTTP 403 unauthenticated), and access is sales-gated via a book-a-demo motion with no self-serve signup, public pricing, or public OpenAPI.
More than an index entry, but the surface is still mostly links rather than artifacts — the cohort most likely to move a full band from modest, well-targeted work.
API Evangelist profiles big xyt the way a machine reads it — 5 machine-readable artifacts across 3 APIs, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.
Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — big xyt scores 23.2/100 (emerging), with a separate agent-readiness read of 10/100 (human only). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
Kin Score
This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance.
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
How we profile big xyt
Each block below is one kind of artifact we hold for big xyt. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.
APIs 3
Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.
Individual APIs this provider publishes, each with its own machine-readable definition.
big xyt API
The core big xyt (xyt hub) API gives trading firms and exchanges programmatic access to normalised and raw tick data and analytics across 120+ venues without in-house tick data ...
Liquidity Cockpit API
API access to the Liquidity Cockpit, big xyt's dark and lit liquidity, market share, and market quality analytics for navigating fragmented equity market structure. Publicly nam...
TCA API
Execution analytics API spanning basic Transaction Cost Analysis - benchmarking trades and orders for best execution, compliance, and client reporting - through full API access ...
Security Posture 2
Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Resources
Every other property we hold for big xyt — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.
Get Started 2
Portal, sign-up, and the first successful call
Documentation 1
Reference material describing how the API behaves
Agent Surfaces 1
MCP servers, agent skills, and machine-readable catalogs
Build 1
SDKs, sample code, and the tooling you integrate with
Access & Security 2
Authentication, authorization, and security posture
Operate 1
Status, limits, changes, and where to get help
Commercial 1
Pricing, plans, and the legal terms of use
Company 3
The organization behind the API
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