# DataSignals Lab

> Self-serve data products that turn official public sources (SEC EDGAR, openFDA, ClinicalTrials.gov, NIH RePORTER, USAspending.gov, US House Clerk, CoinGecko, Apple App Store) into scored, structured signals for traders, quants, fintech and AI agents. Each product runs as an Apify Actor at about $0.20 per result; all of them are also callable by AI agents through one free MCP server.

## For AI agents (MCP)

- [DataSignals Lab MCP server](https://datasignalslab.com/datasignals-mcp.html): one free MCP endpoint exposing all 17 tools to AI agents (Claude, ChatGPT, Cursor). The server is free - you only pay each underlying tool's standard $0.20 per result. Listed in the official MCP registry.
- MCP endpoint (streamable HTTP): `https://datasignalslab--datasignals-mcp.apify.actor/mcp` - point any MCP client here and pass your own Apify API token as a Bearer header. Free tier: 50 MCP calls per month; billable results cost $0.20 each, charged only on a non-empty result (resolve_company and usage are free).
- [Machine-readable server description](https://datasignalslab.com/server.json): name, categories, tags, every tool with the question it answers, the free tier, the price and the accepted payment rail - the format the official MCP registry reads.
- [Agent catalog](https://datasignalslab.com/.well-known/ai-catalog.json): the same server and its 17 tools as an Agentic Resource Discovery catalog, each tool with the question it answers.

## Machine-readable

- [OpenAPI specification](https://datasignalslab.com/api/openapi.json): all public endpoints, the MCP endpoint and its 17 tools, in one machine-readable spec.
- [Stream registry](https://datasignalslab.com/api/streams.json): every data stream with source, cadence, schema and changelog.
- [Confluence cases](https://datasignalslab.com/api/confluence-public.json): tickers hit by multiple independent streams within 10 days, public with a 7 day delay.
- [Proof chain status](https://datasignalslab.com/api/proof.json): the daily hash chain over the published signal set; download the full chain at https://datasignalslab.com/proof/chain.jsonl and each day's fingerprint at https://datasignalslab.com/proof/days/, independently timestamped in the Bitcoin blockchain via OpenTimestamps.
- [Reasoning](https://datasignalslab.com/api/reasoning.json): confluence candidates ranked by conviction with contributing signals and source links, plus a per-signal track record.

## Products

- [Insider Buying Clusters](https://datasignalslab.com/sec-form4-insider-buying.html): When several insiders buy the same stock within days - scored 0-100 from SEC Form 4 filings.
- [Insider Selling (Form 144)](https://datasignalslab.com/sec-form144-insider-selling.html): Who is filing to sell, their role and the dollar value - the leading-indicator companion to Form 4.
- [Activist Stakes (13D/G)](https://datasignalslab.com/sec-13dg-activist-stakes.html): Who is taking a 5%+ stake, activist vs passive, with Item 4 intent, scored by impact.
- [Smart Money 13F](https://datasignalslab.com/smart-money-13f.html): Quarterly hedge-fund buys, exits and cross-fund consensus from 13F filings.
- [8-K Material Events](https://datasignalslab.com/sec-8k-material-events.html): Real-time 8-K events - M&A, executive changes, earnings - classified and materiality-scored.
- [Startup Funding (Form D)](https://datasignalslab.com/startup-funding-form-d.html): New capital raises before the press release - fund noise filtered, amounts and executives parsed.
- [Biotech Catalysts](https://datasignalslab.com/biotech-catalyst-monitor.html): Upcoming clinical-trial readouts and results from ClinicalTrials.gov, ranked by potential impact.
- [FDA Drug Actions](https://datasignalslab.com/fda-drug-approval-monitor.html): Approvals, new indications and priority reviews from openFDA, scored as regulatory catalysts.
- [NIH Research Funding](https://datasignalslab.com/nih-research-funding-monitor.html): Grant momentum by organization or research topic from NIH RePORTER - an upstream R&D signal.
- [Gov Contract Awards](https://datasignalslab.com/gov-contract-awards-monitor.html): Recent federal contract wins per company from USAspending.gov, scored by size and recency.
- [Congress Trading](https://datasignalslab.com/congress-trading-monitor.html): Recent stock trades by US House members from the official House Clerk disclosures, parsed and scored.
- [Crypto Volume & Momentum](https://datasignalslab.com/crypto-volume-momentum-scanner.html): A crypto screener that ranks coins by unusual turnover and momentum, stablecoins filtered.
- [App Review Intelligence](https://datasignalslab.com/app-store-review-intelligence.html): Aspect-based sentiment, emerging issues and competitor comparison from App Store reviews.

## Guides

- [What Is SEC Form 144? Insider Selling Explained (and Form 144 vs Form 4)](https://datasignalslab.com/what-is-sec-form-144.html): What is SEC Form 144? How planned insider sales work, Form 144 vs Form 4 explained, why it is a leading indicator, and how to monitor filings automatically.
- [13D vs 13G Explained: Activist Stakes, Item 4 and What the Filings Really Tell You](https://datasignalslab.com/13d-vs-13g-explained.html): 13D vs 13G explained: what Schedule 13D and 13G filings mean, why Item 4 (purpose of transaction) is the part that matters, and how to monitor activist stakes.

## Blog

- [How to Read an SEC 8-K, and Which Items Actually Move a Stock](https://datasignalslab.com/blog/how-to-read-an-sec-8-k-and-which-items-actually-move-a-stock/): A practical guide to the 8-K item numbers that carry real information (1.01, 2.02, 5.02, 8.01), the routine ones that rarely move anything, and how to read the form in two minutes without guessing.
- [Form 144 Explained: The Filing That Announces a Sale Before It Happens](https://datasignalslab.com/blog/form-144-explained-the-filing-that-announces-a-sale-before-it-happens/): Form 144 is a notice of intent to sell restricted or control stock. Here is who files it, what triggers it, how it differs from a Form 4, and what the notice does not promise.
- [The Biggest Startup Capital Raises — Week 30, 2026 (SEC Form D)](https://datasignalslab.com/blog/biggest-startup-raises-week-30-2026/): 56 operating-company raises totalling $2.0B surfaced in SEC Form D filings (July 23–24, 2026). The top 10, ranked — days before the press.
- [What 13F Filings Hide: Shorts, Options and Non-US Listings](https://datasignalslab.com/blog/what-13f-filings-hide-shorts-options-and-non-us-listings/): 13F filings show only part of a manager's book. Here is what gets left out, why portfolios get misread, and how to read the data honestly.
- [Congress Trading Around Earnings Season: What Disclosure Timing Really Tells You](https://datasignalslab.com/blog/congress-trading-around-earnings-season-what-disclosure-timing-really-/): Congressional trades that land near an earnings date look suspicious. Here is what the disclosure timestamps in a PTR can actually prove about information advantage, and what they cannot.
- [What Happened to STOCK Act Enforcement: Fines, Late Filings, and Why the $200 Penalty Shapes Behavior](https://datasignalslab.com/blog/what-happened-to-stock-act-enforcement-fines-late-filings-and-why-the-/): How the STOCK Act is actually enforced, why a flat $200 late-filing fee is the main penalty, who collects it, and what that design does to disclosure behavior in Congress.
- [The Biggest Congress Trading Myths, Tested Against Filings](https://datasignalslab.com/blog/the-biggest-congress-trading-myths-tested-against-filings/): Five popular claims about congressional stock trading, each checked against the actual disclosure record from the House Clerk, the Senate, and the STOCK Act.
- [Options in Congressional Disclosures: How to Read Calls, Puts, and Exercise Rows](https://datasignalslab.com/blog/options-in-congressional-disclosures-how-to-read-calls-puts-and-exerci/): A practical guide to reading options trades in congressional PTR filings, so you can tell bullish from bearish and avoid misreading the direction of calls, puts, and exercises.
- [How Fast Are Congress Trades Disclosed? Measuring the Real Filing Lag](https://datasignalslab.com/blog/how-fast-are-congress-trades-disclosed-measuring-the-real-filing-lag/): Congress trades must be reported within 45 days, but the real lag varies. Learn how to measure actual filing delays from PTR data and what the ceiling means for anyone following these trades.
- [Committee Assignments and Stock Trades: What to Watch and Why It Matters More Than Trade Size](https://datasignalslab.com/blog/committee-assignments-and-stock-trades-what-to-watch-and-why-it-matter/): A $500,000 trade by a backbencher may mean less than a $20,000 trade by a committee chair. Learn how to connect congressional trades to committee assignments, where to find the official data, and what this signal can and cannot tell you.
- [The 45 Day Rule and Why It Matters](https://datasignalslab.com/blog/the-45-day-rule-and-why-it-matters/): What the STOCK Act's 45-day disclosure deadline actually says, how the 30-day notification clock works, and what the lag means for anyone using the data.
- [Reading a Periodic Transaction Report](https://datasignalslab.com/blog/reading-a-periodic-transaction-report/): A field-by-field guide to congressional PTR filings: owner codes, transaction types, amount ranges, dates, amendments, and the traps in scanned reports.
- [How Congressional Trading Disclosures Work](https://datasignalslab.com/blog/how-congressional-trading-disclosures-work/): The full system behind congressional stock disclosures: the STOCK Act, filing deadlines, amount ranges, and where the official documents live.
- [From Filing to Signal: How Scoring Works](https://datasignalslab.com/blog/from-filing-to-signal-how-scoring-works/): How raw congressional PTR filings become a ranked dataset: size estimates from disclosed ranges, freshness weighting, and consensus across members.
- [The Biggest Startup Capital Raises — Week 29, 2026 (SEC Form D)](https://datasignalslab.com/blog/biggest-startup-raises-week-29-2026/): 60 operating-company raises totalling $9.5B surfaced in SEC Form D filings (July 9–10, 2026). The top 10, ranked — days before the press.
- [Startup Funding Data Sources Compared](https://datasignalslab.com/blog/startup-funding-data-sources-compared/): SEC EDGAR, Crunchbase, PitchBook, tech press, and Form D feeds compared honestly: coverage, timing, cost, and who each source actually serves.
- [Best Congress Trading Trackers Compared](https://datasignalslab.com/blog/best-congress-trading-trackers-compared/): An honest comparison of Capitol Trades, Quiver Quantitative, Unusual Whales, the official House Clerk site, and the DataSignals report.
- [What the STOCK Act Actually Requires](https://datasignalslab.com/blog/what-the-stock-act-actually-requires/): The STOCK Act in plain terms: who must file, the 45-day deadline, the $1,000 threshold, the $200 late fee, and where enforcement falls short.
- [13F Filing Deadline: Dates and the 45-Day Lag](https://datasignalslab.com/blog/13f-deadlines-and-the-45-day-lag/): Every 13F is due 45 days after quarter end, so the holdings you read can be a quarter old. The exact dates, and how to use filing season anyway.
- [Reg D Rule 506(b) vs 506(c): What Actually Differs](https://datasignalslab.com/blog/regulation-d-exemptions-explained/): 506(b) bans public advertising and lets investors self-certify; 506(c) allows open fundraising but you must verify every investor. What that means in practice.
- [How to Follow Berkshire Hathaway's 13F Portfolio](https://datasignalslab.com/blog/follow-berkshire-hathaway-13f/): Where to find Berkshire Hathaway's 13F on SEC EDGAR, how to read the quarterly changes, and what the filing does and does not reveal.
- [Senator Trades Versus the Market: What the Data Shows](https://datasignalslab.com/blog/senator-trades-versus-the-market/): Do senators beat the market? A walk through the actual studies, from the famous 2004 result to the modern research finding no edge.
- [How to Find Startup Funding Rounds Before the Press](https://datasignalslab.com/blog/find-startup-funding-rounds-before-the-press/): A practical workflow for spotting startup raises in SEC Form D filings days or months before TechCrunch, using free EDGAR tools or a parsed daily feed.
- [How to Track Hedge Fund Portfolios](https://datasignalslab.com/blog/how-to-track-hedge-fund-portfolios/): How to track hedge fund portfolios using free SEC 13F filings: the EDGAR workflow, quarter-over-quarter deltas, free tools, and the honest limits.
- [Do Congress Members Beat the Market](https://datasignalslab.com/blog/do-congress-members-beat-the-market/): What the academic evidence says about congressional stock returns, from the famous Ziobrowski studies to the post-STOCK Act replications that found nothing.
- [The Biggest Startup Capital Raises: Week 28, 2026 (SEC Form D)](https://datasignalslab.com/blog/biggest-startup-raises-week-28-2026/): 60 operating-company raises totalling $1.2B surfaced in SEC Form D filings (July 1–2, 2026). The top 10, ranked. Days before the press.
- [What Is SEC Form D: A Plain English Guide](https://datasignalslab.com/blog/what-is-sec-form-d-plain-english/): What SEC Form D is, who files it, what the 15-day deadline means, and why these filings surface startup fundraises before any press coverage.
- [What Is a 13F Filing and How to Read It](https://datasignalslab.com/blog/what-is-a-13f-filing-how-to-read-it/): A plain-English guide to SEC Form 13F: who must file, what the holdings table shows, what it hides, and how to read one on EDGAR.
- [What Is 13F Consensus and Why Crowded Positions Matter](https://datasignalslab.com/blog/what-is-13f-consensus/): 13F consensus explained: how to measure which stocks multiple top funds hold and buy, why crowding cuts both ways, and how to build the analysis.
- [Nancy Pelosi Stock Trades and the PTR Filings](https://datasignalslab.com/blog/nancy-pelosi-stock-trades-explained/): Her trades appear in Periodic Transaction Reports filed with the House Clerk, weeks late and in dollar ranges. Where to find them, and who places them.
- [How to Track Congress Stock Trades in 2026](https://datasignalslab.com/blog/how-to-track-congress-stock-trades-2026/): A practical guide to tracking congressional stock trades: official sources, filing mechanics, delays, ranges, and how to build a usable workflow.
- [How to Read a Form D Filing](https://datasignalslab.com/blog/how-to-read-a-form-d-filing/): A field-by-field walkthrough of SEC Form D: which of the 16 items carry real signal about a startup raise and which are boilerplate you can skip.
- [The Biggest Startup Capital Raises: Week 27, 2026 (SEC Form D)](https://datasignalslab.com/blog/biggest-startup-raises-week-27-2026/): 59 operating-company raises totalling $2.7B surfaced in SEC Form D filings (June 30 – July 1, 2026). The top 10, ranked. Days before the press.
- [How to Track Startup Funding Before the Press Release (SEC Form D)](https://datasignalslab.com/blog/track-startup-funding-sec-form-d/): Most funding rounds never get a press release - but nearly all US private raises file a Form D with the SEC. How to read Form D filings and turn them into a clean funding feed.
- [Which Stocks Did Multiple Hedge Funds Buy Last Quarter? 13F Consensus, With Real Data](https://datasignalslab.com/blog/hedge-fund-13f-consensus-q1-2026/): We ran six famous hedge funds through a 13F consensus analysis - what Berkshire, Pershing Square, Third Point and more agree on, with real Q1 2026 data.
- [A Free MCP Server That Gives AI Agents 13 Live Financial Data Feeds](https://datasignalslab.com/blog/free-mcp-server-financial-data-ai-agents/): Why we built one MCP endpoint for SEC insider trading, 13F, 8-K, FDA, congress trading and crypto data, how the proxy-over-standby architecture works, and the gotchas.
- [How to Track Insider Buying Clusters From SEC Form 4 (Without a $90/Month Subscription)](https://datasignalslab.com/blog/track-insider-buying-clusters-sec-form4/): Single insider buys are noise; clusters of insiders buying the same stock are the signal. How Form 4 cluster detection works and how to monitor it for $0.20 per result.
- [How to Get US Congress Stock-Trading Data From the Official Source](https://datasignalslab.com/blog/congress-trading-data-official-source/): Where congress trading data actually comes from, why Senate data is harder than House data, and how to get parsed, scored House trades for $0.20 per member.
- [Biotech Catalysts: How to Monitor Clinical-Trial Readouts Automatically](https://datasignalslab.com/blog/monitor-biotech-catalysts-clinical-trials/): Trial readouts move biotech stocks 20-80%. How to monitor upcoming completions and posted results from ClinicalTrials.gov, scored by potential impact.

## More

- [Premium reports](https://datasignalslab.com/reports.html): three ranked reports built from the same official sources - Form D capital raises, 13F consensus and Congress trades - $19 each as a one-off, with a free preview per report.
- [Pricing](https://datasignalslab.com/pricing.html): free tier, $19 single report, and DataSignals Pro at $29 per month or $290 per year for all three reports plus 2000 MCP calls a month.
- [Run on Apify](https://apify.com/datasignalslab?fpr=wnlxst): browse and run every product on the Apify marketplace (pay per result, no subscription).
- [How we compare](https://datasignalslab.com/compare.html): DataSignals Lab vs Capitol Trades, Quiver Quantitative, Dataroma, WhaleWisdom and Unusual Whales, plus Fintel and VerityData (InsiderScore) on coverage, price and agent access.
- [Performance](https://datasignalslab.com/performance.html): hypothetical returns of the top signals versus the S&P 500, under rules fixed in advance.
- [Proof](https://datasignalslab.com/proof.html): how the daily hash chain makes the track record tamper-evident, and how to verify it yourself.
- [Confluence](https://datasignalslab.com/confluence.html): tickers hit by multiple independent streams within 10 days.
- [Ask the data](https://datasignalslab.com/reasoning.html): a ranked, evidence-based answer to which ticker has the strongest confluence case right now, and the track record of signals that already reached a measurement horizon.
- [About](https://datasignalslab.com/about.html): what DataSignals Lab is and how the data is sourced.