https://datasignalslab.com/blog.htmlGuides on SEC filings, congress trades, 13F consensus and data for AI agents. https://datasignalslab.com/blog/the-free-tier-that-makes-sense-for-agents-why-50-calls-a-month-beats/https://datasignalslab.com/blog/the-free-tier-that-makes-sense-for-agents-why-50-calls-a-month-beats/Mon, 24 Aug 2026 00:00:00 +0000Trials are built for humans who evaluate once. Agents call on a schedule forever. Here is why a permanent 50-call monthly floor fits agent workloads, and how charge-on-success handles the query that returns nothing. https://datasignalslab.com/blog/reading-sec-filings-with-an-ai-agent-from-a-company-name-to-a-scored/https://datasignalslab.com/blog/reading-sec-filings-with-an-ai-agent-from-a-company-name-to-a-scored/Mon, 24 Aug 2026 00:00:00 +0000A practical walkthrough of how an AI agent turns a company name into a scored disclosure signal using official SEC endpoints, with no custom scraper required. https://datasignalslab.com/blog/biggest-startup-raises-week-34-2026/https://datasignalslab.com/blog/biggest-startup-raises-week-34-2026/Mon, 24 Aug 2026 00:00:00 +000060 operating-company raises totalling $1.4B surfaced in SEC Form D filings (August 20-21, 2026). The top 10, ranked - days before the press. https://datasignalslab.com/blog/what-a-good-mcp-tool-description-looks-like/https://datasignalslab.com/blog/what-a-good-mcp-tool-description-looks-like/Mon, 17 Aug 2026 00:00:00 +0000An agent reads your tool description to decide whether to call you. Here is what it needs: the question the tool answers, an example, the cost, and what an empty result means. https://datasignalslab.com/blog/stateless-or-session-based-a-real-mcp-failure-on-standby-and-the-one/https://datasignalslab.com/blog/stateless-or-session-based-a-real-mcp-failure-on-standby-and-the-one/Mon, 17 Aug 2026 00:00:00 +0000How our MCP server dropped one call in four when Apify Standby spread requests across runs, what the Session not found error actually means, and the single line that fixed it. https://datasignalslab.com/blog/biggest-startup-raises-week-33-2026/https://datasignalslab.com/blog/biggest-startup-raises-week-33-2026/Mon, 17 Aug 2026 00:00:00 +000060 operating-company raises totalling $1.1B surfaced in SEC Form D filings (August 13-14, 2026). The top 10, ranked - days before the press. https://datasignalslab.com/blog/why-an-mcp-server-should-advertise-oauth-discovery/https://datasignalslab.com/blog/why-an-mcp-server-should-advertise-oauth-discovery/Mon, 10 Aug 2026 00:00:00 +0000What the WWW-Authenticate header and /.well-known/oauth-protected-resource actually do, how an agent walks the discovery chain from a 401 to a working token, and why a server that skips this step quietly turns away every client that could have become a user. https://datasignalslab.com/blog/give-your-ai-agent-live-sec-data-in-one-connection/https://datasignalslab.com/blog/give-your-ai-agent-live-sec-data-in-one-connection/Mon, 10 Aug 2026 00:00:00 +0000What the Model Context Protocol actually is, why one MCP endpoint beats maintaining a dozen filing-API integrations, and how to point Claude or Cursor at nightly-refreshed SEC and House disclosure data in about two minutes. https://datasignalslab.com/blog/biggest-startup-raises-week-32-2026/https://datasignalslab.com/blog/biggest-startup-raises-week-32-2026/Mon, 10 Aug 2026 00:00:00 +000060 operating-company raises totalling $2.3B surfaced in SEC Form D filings (August 6-7, 2026). The top 10, ranked - days before the press. https://datasignalslab.com/blog/how-fda-drug-approvals-are-published-and-where-the-dates-come-from/https://datasignalslab.com/blog/how-fda-drug-approvals-are-published-and-where-the-dates-come-from/Mon, 03 Aug 2026 00:00:00 +0000A practical guide to openFDA and Drugs@FDA: what an original approval is, how a supplement differs, why a label change is not news, and which date actually belongs on a timeline. https://datasignalslab.com/blog/biggest-startup-raises-week-31-2026/https://datasignalslab.com/blog/biggest-startup-raises-week-31-2026/Mon, 03 Aug 2026 00:00:00 +000051 operating-company raises totalling $1.3B surfaced in SEC Form D filings (July 30–31, 2026). The top 10, ranked. Days before the press. https://datasignalslab.com/blog/13d-vs-13g-activist-intent-in-one-checkbox/https://datasignalslab.com/blog/13d-vs-13g-activist-intent-in-one-checkbox/Mon, 03 Aug 2026 00:00:00 +0000Both report a 5%+ stake; the difference is intent. 13D means the holder may push for change, 13G means passive. Item 4 is the field that matters. https://datasignalslab.com/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/Mon, 27 Jul 2026 00:00:00 +0000A 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. https://datasignalslab.com/blog/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/Mon, 27 Jul 2026 00:00:00 +0000Form 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. https://datasignalslab.com/blog/biggest-startup-raises-week-30-2026/https://datasignalslab.com/blog/biggest-startup-raises-week-30-2026/Sat, 25 Jul 2026 00:00:00 +000056 operating-company raises totalling $2.0B surfaced in SEC Form D filings (July 23–24, 2026). The top 10, ranked. Days before the press. https://datasignalslab.com/blog/what-13f-filings-hide-shorts-options-and-non-us-listings/https://datasignalslab.com/blog/what-13f-filings-hide-shorts-options-and-non-us-listings/Mon, 20 Jul 2026 00:00:00 +000013F 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. https://datasignalslab.com/blog/congress-trading-around-earnings-season-what-disclosure-timing-really-/https://datasignalslab.com/blog/congress-trading-around-earnings-season-what-disclosure-timing-really-/Mon, 20 Jul 2026 00:00:00 +0000Congressional 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. https://datasignalslab.com/blog/what-happened-to-stock-act-enforcement-fines-late-filings-and-why-the-/https://datasignalslab.com/blog/what-happened-to-stock-act-enforcement-fines-late-filings-and-why-the-/Fri, 17 Jul 2026 00:00:00 +0000How 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. https://datasignalslab.com/blog/the-biggest-congress-trading-myths-tested-against-filings/https://datasignalslab.com/blog/the-biggest-congress-trading-myths-tested-against-filings/Thu, 16 Jul 2026 00:00:00 +0000Five popular claims about congressional stock trading, each checked against the actual disclosure record from the House Clerk, the Senate, and the STOCK Act. https://datasignalslab.com/blog/options-in-congressional-disclosures-how-to-read-calls-puts-and-exerci/https://datasignalslab.com/blog/options-in-congressional-disclosures-how-to-read-calls-puts-and-exerci/Thu, 16 Jul 2026 00:00:00 +0000A 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. https://datasignalslab.com/blog/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/Wed, 15 Jul 2026 00:00:00 +0000The STOCK Act allows 45 days. Across 448 transactions from PTRs filed in July and August 2026, the median lag was 27 days and the slowest was 619. Here is the method, the distribution, and what the numbers cannot tell you. https://datasignalslab.com/blog/committee-assignments-and-stock-trades-what-to-watch-and-why-it-matter/https://datasignalslab.com/blog/committee-assignments-and-stock-trades-what-to-watch-and-why-it-matter/Wed, 15 Jul 2026 00:00:00 +0000A $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. https://datasignalslab.com/blog/the-45-day-rule-and-why-it-matters/https://datasignalslab.com/blog/the-45-day-rule-and-why-it-matters/Tue, 14 Jul 2026 00:00:00 +0000A PTR is due 30 days after the member learns of a trade, and never later than 45 days after the trade itself. Both clocks, and why 45 is the outer wall. https://datasignalslab.com/blog/reading-a-periodic-transaction-report/https://datasignalslab.com/blog/reading-a-periodic-transaction-report/Tue, 14 Jul 2026 00:00:00 +0000A field-by-field guide to congressional PTR filings: owner codes, transaction types, amount ranges, dates, amendments, and the traps in scanned reports. https://datasignalslab.com/blog/how-congressional-trading-disclosures-work/https://datasignalslab.com/blog/how-congressional-trading-disclosures-work/Mon, 13 Jul 2026 00:00:00 +0000The full system behind congressional stock disclosures: the STOCK Act, filing deadlines, amount ranges, and where the official documents live. https://datasignalslab.com/blog/from-filing-to-signal-how-scoring-works/https://datasignalslab.com/blog/from-filing-to-signal-how-scoring-works/Mon, 13 Jul 2026 00:00:00 +0000How raw congressional PTR filings become a ranked dataset: size estimates from disclosed ranges, freshness weighting, and consensus across members. https://datasignalslab.com/blog/biggest-startup-raises-week-29-2026/https://datasignalslab.com/blog/biggest-startup-raises-week-29-2026/Mon, 13 Jul 2026 00:00:00 +000060 operating-company raises totalling $9.5B surfaced in SEC Form D filings (July 9–10, 2026). The top 10, ranked. Days before the press. https://datasignalslab.com/blog/startup-funding-data-sources-compared/https://datasignalslab.com/blog/startup-funding-data-sources-compared/Sun, 12 Jul 2026 00:00:00 +0000SEC EDGAR, Crunchbase, PitchBook, tech press, and Form D feeds compared honestly: coverage, timing, cost, and who each source actually serves. https://datasignalslab.com/blog/best-congress-trading-trackers-compared/https://datasignalslab.com/blog/best-congress-trading-trackers-compared/Sun, 12 Jul 2026 00:00:00 +0000An honest comparison of Capitol Trades, Quiver Quantitative, Unusual Whales, the official House Clerk site, and the DataSignals report. https://datasignalslab.com/blog/what-the-stock-act-actually-requires/https://datasignalslab.com/blog/what-the-stock-act-actually-requires/Sat, 11 Jul 2026 00:00:00 +0000The 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. https://datasignalslab.com/blog/13f-deadlines-and-the-45-day-lag/https://datasignalslab.com/blog/13f-deadlines-and-the-45-day-lag/Sat, 11 Jul 2026 00:00:00 +0000Yes - Form 13F is due within 45 days after each calendar quarter ends: February 14, May 15, August 14 and November 14. Weekends roll forward. https://datasignalslab.com/blog/regulation-d-exemptions-explained/https://datasignalslab.com/blog/regulation-d-exemptions-explained/Fri, 10 Jul 2026 00:00:00 +0000506(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. https://datasignalslab.com/blog/follow-berkshire-hathaway-13f/https://datasignalslab.com/blog/follow-berkshire-hathaway-13f/Fri, 10 Jul 2026 00:00:00 +0000Where to find Berkshire Hathaway's 13F on SEC EDGAR, how to read the quarterly changes, and what the filing does and does not reveal. https://datasignalslab.com/blog/senator-trades-versus-the-market/https://datasignalslab.com/blog/senator-trades-versus-the-market/Thu, 09 Jul 2026 00:00:00 +0000Do senators beat the market? A walk through the actual studies, from the famous 2004 result to the modern research finding no edge. https://datasignalslab.com/blog/find-startup-funding-rounds-before-the-press/https://datasignalslab.com/blog/find-startup-funding-rounds-before-the-press/Thu, 09 Jul 2026 00:00:00 +0000A 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. https://datasignalslab.com/blog/how-to-track-hedge-fund-portfolios/https://datasignalslab.com/blog/how-to-track-hedge-fund-portfolios/Wed, 08 Jul 2026 00:00:00 +0000How to track hedge fund portfolios using free SEC 13F filings: the EDGAR workflow, quarter-over-quarter deltas, free tools, and the honest limits. https://datasignalslab.com/blog/do-congress-members-beat-the-market/https://datasignalslab.com/blog/do-congress-members-beat-the-market/Wed, 08 Jul 2026 00:00:00 +0000The early studies found senators beating the market by 85 basis points a month. The post-STOCK Act replications found nothing. What changed, and why. https://datasignalslab.com/blog/biggest-startup-raises-week-28-2026/https://datasignalslab.com/blog/biggest-startup-raises-week-28-2026/Mon, 06 Jul 2026 00:00:00 +000060 operating-company raises totalling $1.2B surfaced in SEC Form D filings (July 1–2, 2026). The top 10, ranked. Days before the press. https://datasignalslab.com/blog/what-is-sec-form-d-plain-english/https://datasignalslab.com/blog/what-is-sec-form-d-plain-english/Sun, 05 Jul 2026 00:00:00 +0000What SEC Form D is, who files it, what the 15-day deadline means, and why these filings surface startup fundraises before any press coverage. https://datasignalslab.com/blog/what-is-a-13f-filing-how-to-read-it/https://datasignalslab.com/blog/what-is-a-13f-filing-how-to-read-it/Sun, 05 Jul 2026 00:00:00 +0000A 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. https://datasignalslab.com/blog/what-is-13f-consensus/https://datasignalslab.com/blog/what-is-13f-consensus/Sun, 05 Jul 2026 00:00:00 +000013F consensus explained: how to measure which stocks multiple top funds hold and buy, why crowding cuts both ways, and how to build the analysis. https://datasignalslab.com/blog/nancy-pelosi-stock-trades-explained/https://datasignalslab.com/blog/nancy-pelosi-stock-trades-explained/Sun, 05 Jul 2026 00:00:00 +0000Her 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. https://datasignalslab.com/blog/how-to-track-congress-stock-trades-2026/https://datasignalslab.com/blog/how-to-track-congress-stock-trades-2026/Sun, 05 Jul 2026 00:00:00 +0000A practical guide to tracking congressional stock trades: official sources, filing mechanics, delays, ranges, and how to build a usable workflow. https://datasignalslab.com/blog/how-to-read-a-form-d-filing/https://datasignalslab.com/blog/how-to-read-a-form-d-filing/Sun, 05 Jul 2026 00:00:00 +0000A 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. https://datasignalslab.com/blog/biggest-startup-raises-week-27-2026/https://datasignalslab.com/blog/biggest-startup-raises-week-27-2026/Thu, 02 Jul 2026 00:00:00 +000059 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. https://datasignalslab.com/blog/track-startup-funding-sec-form-d/https://datasignalslab.com/blog/track-startup-funding-sec-form-d/Fri, 12 Jun 2026 00:00:00 +0000Most 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. https://datasignalslab.com/blog/hedge-fund-13f-consensus-q1-2026/https://datasignalslab.com/blog/hedge-fund-13f-consensus-q1-2026/Sat, 06 Jun 2026 00:00:00 +0000We 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. https://datasignalslab.com/blog/free-mcp-server-financial-data-ai-agents/https://datasignalslab.com/blog/free-mcp-server-financial-data-ai-agents/Fri, 29 May 2026 00:00:00 +0000Why 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. https://datasignalslab.com/blog/track-insider-buying-clusters-sec-form4/https://datasignalslab.com/blog/track-insider-buying-clusters-sec-form4/Tue, 19 May 2026 00:00:00 +0000Single 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. https://datasignalslab.com/blog/congress-trading-data-official-source/https://datasignalslab.com/blog/congress-trading-data-official-source/Wed, 06 May 2026 00:00:00 +0000Where 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. https://datasignalslab.com/blog/monitor-biotech-catalysts-clinical-trials/https://datasignalslab.com/blog/monitor-biotech-catalysts-clinical-trials/Wed, 22 Apr 2026 00:00:00 +0000Trial readouts move biotech stocks 20-80%. How to monitor upcoming completions and posted results from ClinicalTrials.gov, scored by potential impact.