Add 0xArchive market data service (#572)

README.md

@@ -744,6 +744,7 @@ A curated list of insanely awesome libraries, packages and resources for Quants
 - [Disclosed Capitol](https://www.disclosedcapitol.com/data-files/api) - US congressional and executive-branch stock trade disclosures API. STOCK Act filings plus OGE executive data (~6,743 transactions across 106 officials), with trade-level returns and alpha. Free tier: 500 credits, no card.
 - [Wealthville](https://wealthville.net) - `REST` `MCP` - Liquidity-pool scoring for DeFi market making: a 0-100 score and an Enter/Hold/Exit/Reduce/Avoid verdict, with confidence calibrated per protocol, across ~68,800 Solana pools (Meteora DLMM, Orca Whirlpool, Raydium AMM/CLMM/CPMM) and 575 EVM pools on Ethereum, Arbitrum, Base, Optimism, Polygon and BSC. Outcomes are graded after impermanent loss and published as a miss-inclusive 30-day track record. Free keyless API, OpenAPI spec, and a hosted MCP server. [GitHub](https://github.com/amitesh-m/wealthville-integrations)
 - [Shingou](https://shingou.io) - `REST` `MCP` - Hourly crypto news sentiment and typed market events (hack, regulation, listing, delisting, legal) for 30 pairs, served as point-in-time buckets whose SHA-256 hash is committed to a public append-only log at publish time, so a backtester can check the history was never rewritten. Paid plans are $24, $79 and $249 a month before VAT; the permanent free tier is 1,000 requests a day with BTC, ETH and SOL live, the other 27 pairs delayed 24h, 1 day of history depth, no card, non-commercial use. [GitHub](https://github.com/shingou-io/shingou-integrations)
+- [0xArchive](https://0xarchive.io) - Real-time and historical Hyperliquid and Lighter market data through REST, WebSocket, MCP, SDKs, CLI, and replay, with a permanent free tier.
 
 
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