Add FilingPulse to Commercial & Proprietary Services (#577)

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

README.md

@@ -708,6 +708,7 @@ A curated list of insanely awesome libraries, packages and resources for Quants
 - [PortfolioSavvy](https://portfoliosavvy.com/) - Public SEC ownership research web app for exploring 13F portfolios, insider activity, Schedule 13D/G filings, company facts, and latest filing workflows.
 - [Earnings Feed](https://earningsfeed.com/api) - Real-time SEC filings, insider trades, and institutional holdings API.
 - [EDGAR Events](https://edgarevents.com) - `REST` - SEC filing events as typed JSON: 8-K item codes with materiality flags, SC 13D/13G activist stakes (holder, target, percent of class), merger forms, and S-1/424B IPO filings, polled over REST or pushed via HMAC-signed webhooks, sourced from data.sec.gov.
+- [FilingPulse](https://filingpulse.io) - `REST` `MCP` - Real-time SEC EDGAR filings normalized to one JSON schema: Form 4 insider trades, 8-K corporate events, and S-1/IPO registrations, delivered via REST, HMAC-signed webhooks, and a hosted MCP server, with a permanent free tier (2,500 req/mo, full schema).
 - [Financial Data](https://financialdata.net/) - Stock Market and Financial Data API.
 - [Filings Flow](https://filingsflow.com) - Free SEC 13F research web app covering 11,700+ institutional managers and 208,000+ filings from 2019 onward. Quarter-over-quarter position changes with share-based thresholds, confidential-treatment reveals badged, per-filing links to the EDGAR source document, and Excel export on every table. No account required.
 - [Frostbyte](https://agent-gateway-kappa.vercel.app) - Real-time crypto prices for 500+ tokens via REST API with free tier, DeFi swap routing and portfolio tracking.