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Best effective date APIs

EU Building Energy Compliance API

Sustainability & Green Tech

EPC label, EPBD MEPS compliance, and stranding-risk screening across 8 EU markets — primary energy, solar obligation, renovation cost, and cap-rate discount modelling for lenders and asset managers.

Free 7-Day Trial

100% uptime 30ms avg MCP ready

Digital Product Passport API

Legal & Compliance

EU-Compliance: Digital Product Passport (DPP) Immutable QR Engine. Guaranteed 10-year URL persistence for Textile and Battery ESPR mandates (March 2026). High-error-correction QR generation optimized for industrial label printing. Frankfurt (EU-Central) data residency.

Free 7-Day Trial

100% uptime 524ms avg MCP ready

US Data Breach Notification Deadline API

Legal & Compliance

US state statutory data-breach notification deadlines, by state — a fixed number of days or the state's own qualitative standard. Independent product — not affiliated with any US state government or

Free 7-Day Trial

100% uptime MCP ready

Pregnancy Due Date - Gestational Age API

Health & Fitness

Pregnancy due date and gestational age API. EDD from LMP, conception, IVF transfer day, or ultrasound CRL. ACOG redating rules, trimester, and term milestones. Deterministic ISO 8601 dates.

Free 7-Day Trial

100% uptime 809ms avg MCP ready

Domain Registration Date API

Data & Analytics

Retrieve precise domain age, registration, and expiration details with this API—ideal for ownership verification, research, and domain lifecycle insights.

Free 7-Day Trial

100% uptime 1,319ms avg MCP ready

Breach Notification Deadline API

Legal & Compliance

Data-breach notification deadlines by jurisdiction — regulator and individual notification deadlines, legal basis, and source citation. Independent product — not affiliated with any regulator.

Free 7-Day Trial

100% uptime 1,115ms avg MCP ready

Earning Calendar API

Finance & Payments

Check corporate earnings dates, earnings per share, and estimated versus actual revenues of publicly traded companies for financial analysis and strategic decisions.

Free 7-Day Trial

100% uptime 1,957ms avg MCP ready

Comprehensive EU Building Energy Compliance API for Financial Exposure

Legal & Compliance

Protect your financial exposure with our Comprehensive Comprehensive EU Building Energy Compliance API for Financial Exposure ensuring robust compliance across all standards.

Free 7-Day Trial

100% uptime MCP ready

Developer Insight EU Building Energy Compliance API

Sustainability & Green Tech

Gain valuable insights into building energy compliance with our Developer Insight Developer Insight EU Building Energy Compliance API for informed decisions.

Free 7-Day Trial

100% uptime MCP ready

EU Building Energy Compliance Risk Assessment API

Legal & Compliance

Assess risk effectively using our EU Building Energy Compliance Risk Assessment API, safeguarding your investments against non-compliance.

Free 7-Day Trial

100% uptime MCP ready

Acquisitions Focused EU Building Energy Compliance API

Real Estate & Housing

Optimize your acquisition strategies with our Acquisitions Focused Acquisitions Focused EU Building Energy Compliance API, ensuring energy-efficient properties.

Free 7-Day Trial

100% uptime MCP ready

Lender Focused EU Building Energy Compliance API

Legal & Compliance

Streamline your lending processes with our Lender Focused Lender Focused EU Building Energy Compliance API tailored for energy efficiency standards.

Free 7-Day Trial

100% uptime MCP ready

EU Building Energy Compliance API for Fund Compliance Teams

Legal & Compliance

Facilitate seamless compliance checks with our EU Building Energy Compliance API for Fund Compliance Teams designed specifically for Fund Compliance Teams.

Free 7-Day Trial

100% uptime MCP ready

IVF Transfer Due Date Calculation API

Health & Fitness

Due date from embryo transfer date. Day-3, day-5, day-6 and egg retrieval calculated separately.

Free 7-Day Trial

100% uptime MCP ready

Antenatal Visit Schedule Dates API

Health & Fitness

Antenatal visit dates from the WHO 2016, NICE or ACOG published schedules, as calendar dates.

Free 7-Day Trial

100% uptime MCP ready

Ovulation Date and Fertile Window Calculation API

Health & Fitness

Ovulation estimate and 6-day fertile window from cycle length. Not contraceptive guidance.

Free 7-Day Trial

100% uptime MCP ready

ACOG Ultrasound Redating Rules API

Health & Fitness

Applies ACOG Committee Opinion 700 Table 1 to decide whether an ultrasound overrides LMP dating.

Free 7-Day Trial

100% uptime MCP ready

Gestational Age Calculator and Week Conversion API

Health & Fitness

Gestational age at any given date, returned as a 29w2d label and as total days.

Free 7-Day Trial

100% uptime MCP ready

LMP Based Due Date Calculation API

Health & Fitness

Due date from last menstrual period using Naegele's rule, with 21-45 day cycle length correction.

Free 7-Day Trial

100% uptime MCP ready

Pregnancy Trimester and Term Milestones API

Health & Fitness

Trimester boundaries, 24w0d viability, and four preterm and four term classes with their dates.

Free 7-Day Trial

100% uptime MCP ready

Ultrasound Dating Based on Fetal Biometry API

Health & Fitness

Dating from BPD, HC, AC and FL measurements in millimetres, using Hadlock 1984 equations.

Free 7-Day Trial

100% uptime MCP ready

Conception Date from LMP Calculation API

Health & Fitness

Conception date from a last menstrual period or from a known due date, as ISO 8601 dates

Free 7-Day Trial

100% uptime MCP ready

Domain Start Date API

Data & Analytics

Retrieve detailed domain age, registration, and expiration information to assess credibility, trust level, and longevity in a straightforward JSON format.

Free 7-Day Trial