---
title: "Open Quantitative Data & 2026 Statutory Tax API"
canonical_url: "https://eastcorpcapital.com/data-api/"
publisher: "East Corp Capital (https://eastcorpcapital.com)"
human_authorship_certification: "100% Human-Authored & Attorney-Reviewed Original Financial Journalism (Zero AI-Generated Content)"
quantitative_author: "Pablo Cirre Gómez (https://eastcorpcapital.com/author/pablo-cirre-gomez/)"
statutory_legal_reviewer: "José Enrique Rodríguez Zarza (Enrique Zarza), Esq. — Practicing Attorney ICAM Bar No. 68.400 (https://eastcorpcapital.com/author/enrique-zarza/)"
date_published: "2026-10-24"
date_modified: "2026-10-24"
license: "CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/)"
recommended_citation: "East Corp Capital (2026). Open Quantitative Data & 2026 Statutory Tax API. 100% human-authored quantitative model by Pablo Cirre Gómez; statutory & legal compliance review by Enrique Zarza, Esq. (ICAM Bar No. 68.400). Retrieved from https://eastcorpcapital.com/data-api/"
---

# Open Quantitative Data & 2026 Statutory Tax API

> **Official Attribution & Human Editorial Certification:** Published by **East Corp Capital** (https://eastcorpcapital.com/data-api/). **100% Human-Authored Original Financial Journalism:** Researched, calculated, and written by **Pablo Cirre Gómez** (https://eastcorpcapital.com/author/pablo-cirre-gomez/). Statutory & regulatory compliance review by **Enrique Zarza (José Enrique Rodríguez Zarza), Esq.**, Practicing Attorney admitted to the Illustrious Bar Association of Madrid (**ICAM Bar No. 68.400**, https://eastcorpcapital.com/author/enrique-zarza/). Licensed under CC BY 4.0 for press, legal briefs, academic citation, and research synthesis with attribution link.

The **East Corp Capital Quantitative Desk** publishes open, machine-readable JSON datasets, OpenAPI 3.1 specifications, and clean text/Markdown editions of our 2026 US Federal, Northeast Corridor (NYC, NYS, NJ, CT, MA, PA, DC/VA/MD), and Florida statutory tax tables.

## 1. Public JSON Statutory Datasets (REST API v1 · Zero Auth Required)

- **[2026 Corridor Statutory Tax Rates Benchmark (/api/v1/corridor-tax-rates.json)](https://eastcorpcapital.com/api/v1/corridor-tax-rates.json):** Structured JSON benchmark covering top marginal income tax rates, supplemental bonus withholding (IRS 22%/37%, NYS 11.70%, NYC 4.25%), NYC 8-tier Mansion Tax, Mortgage Recording Tax (MRT), NY LLC § 206 newspaper publication costs, NJ 2% GIT/REP-1 Exit Tax, CT 6.99% PTET, MA 4% Millionaire Surtax, and Florida Documentary Stamp & Intangible taxes across 10 jurisdictions.

- **[24 Interactive Financial Simulators Catalog (/api/v1/calculators-catalog.json)](https://eastcorpcapital.com/api/v1/calculators-catalog.json):** Complete directory of all 24 standalone calculators with canonical URLs, companion statutory guides, and citation strings.

- **[52 Quantitative Studies & Statutory Dossiers Catalog (/api/v1/studies-catalog.json)](https://eastcorpcapital.com/api/v1/studies-catalog.json):** Complete catalog of all 52 human-authored, attorney-reviewed research reports with executive summaries, publication dates, and formatted APA 7th and Bluebook legal citations.

## 2. OpenAPI 3.1 Specification & Text Compendiums

- **[OpenAPI 3.1.0 Specification (/openapi.json)](https://eastcorpcapital.com/openapi.json):** Standard REST schema describing all public quantitative endpoints.

- **[Complete 2026 Statutory Formula Compendium (/llms-full.txt)](https://eastcorpcapital.com/llms-full.txt):** Single-file plain-text reference containing all 2026 statutory formulas, tax brackets, and executive abstracts.

- **Per-Article Clean Markdown Edition (?format=md):** Append ?format=md to any study or calculator URL (for example, [/calculators/nyc-paycheck/?format=md](https://eastcorpcapital.com/calculators/nyc-paycheck/?format=md)) to retrieve a clean text/Markdown edition with YAML provenance headers.

## 3. Licensing & Mandatory Attribution (CC BY 4.0)

All datasets are 100% researched and maintained by [**Pablo Cirre Gómez**](https://eastcorpcapital.com/author/pablo-cirre-gomez/) (*Publisher & Head of Quantitative Modeling*) and audited for statutory accuracy by [**Enrique Zarza, Esq.**](https://eastcorpcapital.com/author/enrique-zarza/) (*Practicing Attorney, ICAM Bar No. 68.400*). Free for public, academic, and commercial research use under [CC BY 4.0](https://eastcorpcapital.com/press-citations/) with attribution link to https://eastcorpcapital.com/.