Programmatic access to Brina Gap scores, Zyberno Scores, intrinsic value, margin of safety, ROIC, and owner earnings — built directly on SEC filing data. Free with attribution. Includes an MCP server for Claude and other AI assistants.
No signup, no API key. Free tier: 60 requests per hour per IP. The only requirement: visible attribution to Zyberno with a link to zyberno.com wherever the data is shown. Not investment advice.
GET https://api.zyberno.com/v1/stock/AAPL # full analysis for one ticker GET https://api.zyberno.com/v1/brina-gap/AAPL # focused Brina Gap data GET https://api.zyberno.com/v1/movers # current Double Discounts & value traps GET https://api.zyberno.com/v1/market-valuation # 0-100 market valuation score
Try it now from a terminal:
curl https://api.zyberno.com/v1/stock/AAPL
Zyberno runs a free Model Context Protocol server, so AI assistants can pull live Brina Gap analysis directly into a conversation. Ask Claude "what's Apple's Brina Gap?", "find profitable mid-caps trading below their DCF value", or "which stocks are value traps right now?" and it answers from Zyberno's live data, with sources.
MCP endpoint https://api.zyberno.com/mcp Tools get_stock_valuation Valuation record for one US-listed company screen_stocks Find companies by valuation, quality, growth, balance sheet, momentum or earnings surprise list_flagged_stocks The published monthly Double Discount and value trap lists get_us_market_valuation US market valuation score (0-100) calculate_dcf_value Two-stage DCF on assumptions you supply simulate_portfolio_outcomes Monte Carlo distribution of portfolio outcomes Protocol Streamable HTTP. Serves MCP revision 2026-07-28 (stateless core, cacheable list results) and the earlier initialize-based revisions back to 2024-11-05 on the same URL.
To connect in Claude: Settings → Connectors → Add custom connector → paste https://api.zyberno.com/mcp — no authentication needed.
The same endpoint works in any client that speaks Streamable HTTP, including ChatGPT custom connectors and Google's MCP connector. Tool names changed in v2.0 (August 2026): analyze_stock, get_brina_gap_movers and get_market_valuation are now get_stock_valuation, list_flagged_stocks and get_us_market_valuation. Conversational clients pick this up automatically.
A single GET request by ticker symbol returns the full Zyberno fundamental analysis — the same data that powers every page on this platform, delivered as clean JSON.
Plus 130+ additional fundamental metrics — P/B, P/S, EV/EBITDA, PEG ratio, Piotroski F-Score, Altman Z-Score, debt ratios, margins, growth rates, DuPont analysis, dividend data, and full 5-year historical series for key financials.
GET https://api.zyberno.com/v1/stock/AAPL { "symbol": "AAPL", "company_name": "Apple Inc.", "sector": "Technology", "price": 291.58, "market_cap": 4572633623140, "valuation": { "intrinsic_value": 2497641238297, "margin_of_safety_pct": -83.1, "expected_return_5yr_annual_pct": -4.5 }, "brina_gap": { "gap_pp": -15.64, "fundamental_growth_rate_pct": 0.53, "market_implied_growth_rate_pct": 16.17, "brina_matrix_quadrant": "Expensive Hype" }, "quality": { "zyberno_score, roic_pct, roe_pct" }, "fundamentals_ttm": { "revenue, net_income, free_cash_flow, owner_earnings, eps_diluted, earnings_surprise_sue" }, "summary": "Apple Inc. (AAPL) has a Brina Gap of -15.6pp: ...", "pages": { "stock_report, brina_gap" }, "attribution": { "source, url, framework, license" } }
All data is sourced directly from SEC 10-K and 10-Q filings. Valuation outputs are the direct result of the model — not adjusted to match the current price or analyst consensus.
Free tier: 60 requests/hour per IP, no key required. Attribution required: wherever Zyberno data is shown, include "Data by Zyberno" with a link to zyberno.com. Not investment advice. Need higher limits, bulk access, or commercial licensing? Contact us — we answer within 48 hours.
Every metric is sourced directly from company financial statements and SEC filings — not aggregated, not estimated, not adjusted.
The Brina Gap and Zyberno Score are not available anywhere else. They are built on a published, citable, fully reproducible methodology — ranked first among all pure valuation metrics tested on the survivorship-free S&P 500 (DOI: 10.5281/zenodo.20651608).
Valuation numbers reflect what the model produces from current fundamentals. They are not smoothed toward market consensus or analyst targets.
Include your use case and we will get back to you within 48 hours.
Every metric the API exposes is already available on Zyberno — free, for any stock, right now. Start with the screener or pull up a full stock report.
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