530A Model Updates https://530amodel.com/updates/ Dated changelog of 530amodel.com: rule re-verifications against primary sources, new guides, and calculator releases. en-us MCP server opened to every AI platform https://530amodel.com/updates/ 530a-update-2026-07-19-0 Sun, 19 Jul 2026 12:00:00 GMT Published to the official MCP registry (com.530amodel/calculator) with ChatGPT-compatible search/fetch tools, structured tool results, and platform setup guides for Claude, ChatGPT, Cursor, and agent APIs. Live fund returns in the Advanced Model https://530amodel.com/updates/ 530a-update-2026-07-19-1 Sun, 19 Jul 2026 12:00:00 GMT New fund and historic-period dials set the return assumption from real market data (trailing 1/5/10-year annualized returns for the eligible funds), converted to after-inflation terms with the math shown. New guides: glossary, withdrawals, timing, employer money, 530A vs 529 https://530amodel.com/updates/ 530a-update-2026-07-19-2 Sun, 19 Jul 2026 12:00:00 GMT Five plain-English reference pages covering the questions families actually search, each grounded in the verified rules and linked to primary sources. Security hardening https://530amodel.com/updates/ 530a-update-2026-07-15-3 Wed, 15 Jul 2026 12:00:00 GMT Strict Content-Security-Policy with per-build script hashes, HSTS, and per-IP rate limiting on all public endpoints. Pledges & gifts feed https://530amodel.com/updates/ 530a-update-2026-07-14-4 Tue, 14 Jul 2026 12:00:00 GMT A tracked feed of reported 530A pledge programs, with human-reviewed entries you can model for your own child in one click — now also available as RSS. Public API and MCP server https://530amodel.com/updates/ 530a-update-2026-07-13-5 Mon, 13 Jul 2026 12:00:00 GMT The calculator engine became free to call: JSON API with OpenAPI spec, and a read-only MCP server for AI assistants. No auth, nothing stored, attribution asked. Rules verified against primary sources https://530amodel.com/updates/ 530a-update-2026-07-12-6 Sun, 12 Jul 2026 12:00:00 GMT Every figure re-checked against the statute, IRS Notice 2025-68, and the CRS overview. Unverifiable items (529 rollover, early-withdrawal penalty, cap indexing mechanics) remain explicitly flagged pending the expected March 2026 regulations. 530amodel.com launch https://530amodel.com/updates/ 530a-update-2026-07-12-7 Sun, 12 Jul 2026 12:00:00 GMT Free, privacy-first 530A calculator: instant projection widget, Advanced Model with seeded Monte-Carlo ranges, and cent-exact math cross-verified between two independent implementations.