Cited, current, callable.
The U.S. tax, benefit, and planning figures your software has to get right — contribution limits, tax brackets, RMDs, IRMAA, COLA, estate and gift numbers — each traced to its primary government source, kept current as the rules change, and served over a live API and MCP.
GET /api/reference/v1/us-federal-2026 { "key": "retirement.401k.elective_deferral.under_50", "value": 24500, "unit": "USD", "tax_year": 2026, "effective_date": "2026-01-01", "status": "official_final", "source": { "issuer": "IRS", "document": "Notice 2025-67", "section": "402(g)(1)" } }
Every figure carries its issuer, document, section & effective date.
98 source-verified federal figures for tax year 2026, plus state planning parameters for the cases that move the needle. Each value cites the IRS, SSA, CMS, HHS, or Treasury document it came from.
Call the JSON API directly, or point Claude, Cursor, or your own app at one MCP endpoint and let it look up a cited figure on demand. Either way, the source comes back attached — so the assistant you ship can show its work too.
GET /api/reference/v1/us-federal-2026 — figures, units, effective dates, and citations. ETag-cached.
get_reference_parameter, list_reference_parameters, get_planning_benchmark.
Ask what a figure was as of a past date — and defend a number you shipped last quarter.
// add the server once — Claude, Cursor, or your app { "mcpServers": { "wealthschema": { "url": "https://www.wealthschema.com/api/mcp" } } }
Every figure is compiled from its primary U.S. government source — issuer, document, section, URL, and effective date — and cross-checked before it ships. “IRS Notice 2025-67,” not “a model told me.” Golden-fixture regression tests mean a new tax year cannot silently change the shape or break a key.
Free to read and free to build on. Upgrade when you need commercial rights, higher limits, point-in-time history, or a freshness SLA.
Current + prior year, non-commercial, with attribution.
Single-product commercial use, monthly rates, MCP access.
Point-in-time history, update webhooks, multi-environment.
Redistribution within your product, freshness SLA, priority support.
Planning-software vendors, custodians & large RIA tech.
See the full rights & terms on the feed terms page.
Informational only — not tax, legal, or financial advice. Each figure is compiled from the cited primary U.S. government source and cross-checked. The 2026 feed is a preview; confirm any value against the issuing agency before relying on it.