Crypto Data Feeds, Tick Archive & HFT Engine — CryptoStruct

# CryptoStruct > Realtime and historical crypto AND prediction-market data (Kalshi, > Polymarket) across major venues, plus the low-latency trading stack behind > it. Self-serve on this site: full-day tick recordings (L2 order-book > snapshots + updates, trades, liquidations, mark/index prices incl. options > greeks, funding) sold per instrument-day, free samples, and a public > per-minute statistics API. Key facts for parsers: tick files are > zstd-compressed JSON-lines; line 1 is instrument masterdata; all > prices/quantities are decimal strings; timestamps are integer nanoseconds > since epoch, UTC. Every HTML page on this site is also available as > markdown: request it with `Accept: text/markdown` (responses carry > x-markdown-tokens). ## MCP server - [MCP endpoint](https://cryptostruct.com/mcp): remote MCP server (Streamable HTTP; keyless free tier) — search the instrument catalog, check archive coverage, read live market statistics (OHLC/VWAP/turnover/spreads/depth/hourly/slippage), get EUR quotes, download free samples, and buy tick-data files from any MCP client (payment via Stripe checkout URL in the browser) - [MCP sign-in endpoint](https://cryptostruct.com/mcp/auth): same server with OAuth sign-in (Clerk) — your orders/files/credits in-agent, checkout pays with Premium credits, and CryptoStruct Premium unlocks deep windows (daily 365d/max, hourly 180d, slippage 24h/7d, minute-range history, per-day minute CSV, quality metrics) - [MCP docs](https://cryptostruct.com/docs/mcp): tool reference, Premium & sign-in guide, client setup for Claude Code, claude.ai, Cursor and raw JSON-RPC - [MCP server card](https://cryptostruct.com/.well-known/mcp/server-card.json): discovery document (SEP-1649) — endpoints, transport, capabilities, protocol versions - WebMCP page tools: every page also registers browser-agent tools via navigator.modelContext (search_instruments, get_instrument_days, get_coverage, get_last_24h_stats, get_cart, add_day_to_cart) — in-bro