Chart Library

What is Chart Library?

Chart Library is a market research service that compares a stock's latest completed trading session with similar situations in market history and reports the range of outcomes that followed. You can search historical comparisons on the website, read daily research notes, or connect an AI agent through an MCP server or REST API. The market_state tool returns the current state, historical analogs with sample sizes and dates, and outcome ranges expressed as excess returns, while other tools return published research, a dated calibration receipt and company research files. The site stresses that these are research evidence rather than buy or sell advice, and that missing data stays missing. The pricing page says it is free to use, with no account needed to try a comparison, though service limits and data-licensing terms still apply. Retail traders, quants and developers building finance agents use it.

Use cases

• Find historical analogs for a stock
• Check outcome ranges after a setup
• Read daily market research notes
• Give an AI agent market history
• Review company research files
• Compare companies at a reported quarter

Who it's for

• Retail investors
• Swing traders
• Market researchers
• Developers

Why use Chart Library

• Puts a stock's recent behavior next to comparable past situations in one lookup.
• Responses keep dates, sample sizes and warnings attached, so weak evidence is visible.
• An MCP server and REST API make it usable from AI agents and scripts.
• No account or API key is needed to start.

Chart Library features

• Market state lookup by ticker symbol
• Historical analogs with sample sizes and dates
• Outcome ranges reported as excess returns
• Daily research note with its selection rule
• Dated calibration receipt for published methods
• MCP server over streamable HTTP with no authentication
• REST API for state, research and company endpoints
• Company files with sourced financial history and scenarios

Chart Library integrations

• Claude
• Cursor

How to get started with Chart Library

1. Enter a ticker on the site, or call the state-packet endpoint with a symbol.
2. Review the returned market state, historical analogs and outcome ranges.
3. Read the sample sizes, session dates, warnings and provenance before drawing conclusions.
4. Optionally add the MCP server URL to a compatible client so an agent can call the same tools.

Chart Library limitations

• Not a recommendation to buy or sell; ranges are historical, not forecasts
• Data reflects the latest completed session, not real-time quotes
• Free access still has throughput limits and data-licensing terms that restrict redistribution
• Not suited to live trade execution

Chart Library pricing

Chart Library is free to use.

Prices can change and may vary by country or exclude tax. Check the official pricing page.

Chart Library alternatives

The main Chart Library alternatives listed on Debuly are Tapetide MCP, alphaXiv, BitBank.nz, OpenResearch, Consensus and DDScore. The table compares pricing and platforms; order is A–Z.

1. 

   alphaXiv

   Platform for following arXiv papers and researchers, with AI overviews, an assistant grounded in the paper, and an MCP server for agents.

   Research and searchProductivityDeveloper platforms
   Visit alphaXiv (official site)
2. 

   BitBank.nz

   AI crypto price forecasts for 70+ pairs, a simulated trading bot with published fills, and a REST and WebSocket API for developers.

   Research and searchDeveloper platformsAutomation and agents
   FreemiumVisit BitBank.nz (official site)
3. 

   Consensus

   AI search engine for research that answers questions from peer-reviewed papers, with every claim linked back to its source.

   Research and search
   FreemiumVisit Consensus (official site)
4. 

   DDScore

   AI first-pass due diligence for private companies: upload a deck or data room and get 12-dimension scores, exit scenarios and risks.

   Research and searchProductivity
   Visit DDScore (official site)
5. 

   OpenResearch

   Local-first workspace from alphaXiv that turns coding agents into research agents and rents GPU compute for experiments

   Research and searchAutomation and agentsCoding
   Open sourceVisit OpenResearch (official site)
6. 

   Tapetide MCP

   MCP server that gives Claude, ChatGPT and Cursor 55 tools for NSE and BSE quotes, financials, screening and option chains.

   Research and searchDeveloper platformsAutomation and agents
   FreemiumVisit Tapetide MCP (official site)

Chart Library FAQ

Sources & verification

Facts on this page come from the official sources below, each with the date we read it. Written by Debuly; the vendor did not review this page.

Image credits

• Logo: from chartlibrary.io · fetched 23 Oct 2026 · Vendor trademark, used only to identify the product; removed on request
• Cover: none collected yet, so a generated tile is shown.

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