Hebrew Calendar Pricing: API Costs & Free Tier (2026)

Pricing overview

Hebrew Calendar, primarily through its Hebcal API, operates on a dual-tier pricing model designed to accommodate both individual users and commercial entities. For personal and non-commercial applications, access to the API is provided free of charge, enabling developers to integrate Jewish calendar functionalities without direct monetary cost. This includes features like Hebrew date conversion, retrieval of Jewish holiday information, and calculation of Shabbat times. The free tier is intended for educational, personal, or small-scale community projects where the usage volume falls within reasonable non-commercial parameters.

For organizations, businesses, or applications with commercial intent, and those requiring higher usage volumes, dedicated support, or specific service level agreements (SLAs), Hebrew Calendar offers custom enterprise pricing. This model involves direct engagement with the Hebcal team to define specific requirements and negotiate a tailored service package and corresponding cost. The custom enterprise approach ensures that commercial users receive a solution scaled to their operational needs, covering aspects such as expected request volume, data integration depth, and any specialized features or support. Detailed information regarding the scope and limitations of the free tier and the process for obtaining commercial pricing is outlined in the Hebcal Developer API documentation.

Plans and tiers

The Hebcal API structure is bifurcated into two primary access tiers: a free tier for non-commercial use and a custom enterprise tier for commercial applications. There are no publicly listed, standardized pricing plans with fixed monthly or annual fees for commercial use; instead, each commercial engagement is treated as a custom project. This allows for flexibility in meeting diverse business needs, from small startups to large enterprises requiring extensive calendar data integration.

Free Tier

The free tier is accessible to anyone developing personal or non-commercial applications. This tier typically includes:

• Access to core API endpoints for Hebrew date conversion.
• Retrieval of Jewish holiday data.
• Calculation of Shabbat and holiday candle lighting times.
• Geographic lookup functionalities for relevant Jewish times.
• Standard rate limits suitable for individual developers or small community projects.
• Use of JSON and XML response formats.

The explicit terms and conditions for non-commercial use are detailed within the Hebcal API usage guidelines, and developers are encouraged to review these to ensure compliance.

Custom Enterprise Tier

Designed for commercial organizations, this tier provides a bespoke service. Key characteristics of the custom enterprise plan include:

• Tailored Pricing: Costs are determined based on specific usage patterns, anticipated API call volume, data requirements, and necessary support levels.
• Increased Rate Limits: Higher thresholds for API requests compared to the free tier, supporting larger user bases or more frequent data retrieval.
• Dedicated Support: Access to priority technical assistance for integration, troubleshooting, and optimization.
• Service Level Agreements (SLAs): Formal agreements outlining uptime guarantees, response times, and performance metrics, crucial for business-critical applications.
• Custom Features: Potential for development of specific features or data sets not available in the standard free offering, depending on the agreement.
• Commercial Licensing: Legal authorization for using Hebcal data and services in revenue-generating or business-related applications.

Commercial entities interested in using the Hebcal API are advised to contact the Hebcal team directly to discuss their project and obtain a customized quote.

Plan Comparison Table

Free tier and limits

The Hebrew Calendar API offers a robust free tier specifically for personal and non-commercial use cases. This tier allows developers to access the core functionalities of the Hebcal API without incurring any costs. The primary limitation for the free tier is its intended use: it is strictly for applications that do not generate revenue or are not part of a commercial enterprise. Examples of suitable uses include personal websites, educational tools, small synagogue websites, or open-source projects that do not have a commercial component.

While specific numerical rate limits for the free tier are not publicly advertised to prevent misuse, the general understanding is that usage should be reasonable and consistent with non-commercial application patterns. Excessive or automated high-volume requests that could impact service availability for other users may lead to temporary restrictions or require a discussion about commercial terms. Developers are encouraged to design their applications to cache data where appropriate and make efficient use of API calls to stay within reasonable limits. The Hebcal API documentation serves as the authoritative source for understanding free tier usage policies and best practices.

For clarity, the following types of projects generally fall within the free tier's scope:

• A personal blog displaying daily Hebrew dates.
• A mobile app for individual use showing Shabbat times.
• An educational website teaching about Jewish holidays.
• A non-profit organization's calendar displaying local Zmanim (Jewish prayer times).

Conversely, any application that involves direct or indirect monetization, acts as a core component of a commercial service, or requires guaranteed uptime and dedicated support would typically fall outside the free tier and necessitate a custom enterprise plan. Developers can also refer to general API usage guidelines, such as those provided by Google's API Services User Data Policy, which often distinguish between personal and commercial use in broader terms, for a comparative understanding of such differentiations.

Real-world cost examples

Given the custom enterprise pricing model for commercial use, providing exact real-world cost examples for Hebrew Calendar's API is challenging, as each commercial agreement is negotiated individually. However, we can illustrate scenarios that would trigger the need for a commercial plan and the factors that would influence its cost.

Scenario 1: Small Business Website

• Use Case: A small online Judaica store wants to display upcoming Jewish holidays and relevant candle lighting times directly on its product pages to enhance the customer experience. The website anticipates approximately 5,000 unique visitors per month, resulting in a moderate number of API calls for holiday data and geographic lookups.
• Cost Implication: This is a commercial use case, as the website generates revenue. The business would need to contact Hebcal for a custom enterprise quote. The cost would likely be at the lower end of the commercial spectrum, potentially a modest annual fee or a usage-based fee with a low minimum, given the relatively low volume and straightforward integration. Factors influencing the quote would include the estimated monthly API requests and the criticality of the service to the business.

Scenario 2: Large-Scale Mobile App

• Use Case: A popular mobile application focusing on Jewish lifestyle and community, with 500,000 active users, integrates Hebrew Calendar's API to provide personalized daily Jewish dates, Zmanim (prayer times) based on user location, and a comprehensive holiday calendar. The app makes frequent API calls for each user, resulting in millions of requests per month.
• Cost Implication: This high-volume, commercial application clearly requires an enterprise plan. The cost would be significantly higher than Scenario 1, reflecting the substantial API usage, the need for robust infrastructure, potential for dedicated support, and possibly an SLA. The quote would consider the total number of API calls, the complexity of data requested (e.g., dynamic Zmanim calculations per user), and any specific performance guarantees required by the app.

Scenario 3: Educational Platform

• Use Case: A non-profit online educational platform provides free courses on Jewish studies. It uses the Hebrew Calendar API to display historical dates, upcoming holidays, and contextual information within its curriculum. The platform is free for users and does not generate direct revenue.
• Cost Implication: This scenario would likely fall under the free tier. As a non-commercial educational initiative, and assuming usage remains within reasonable non-commercial limits, the platform would not incur direct costs for API access. However, if the platform grew to an extremely large scale, even without direct monetization, Hebcal might engage in discussions to ensure service stability, potentially suggesting an arrangement that could still be non-monetary but formalized.

Key Factors Influencing Custom Enterprise Costs:

• API Call Volume: The primary driver of cost, measured in requests per second, minute, or month.
• Data Complexity: Whether simple date conversions are needed or more complex, dynamic calculations like Zmanim.
• Support Level: The need for dedicated account management, priority support, or rapid response times.
• Service Level Agreements (SLAs): Guarantees on uptime and performance, critical for business continuity.
• Custom Development: Requests for specific features or data sets tailored to the client's needs.

Prospective commercial users should prepare a detailed outline of their project requirements, estimated usage, and desired support levels before contacting Hebcal for a personalized pricing discussion.

How the pricing compares

When evaluating the pricing of Hebrew Calendar's API (Hebcal) against alternatives, it's essential to consider the unique nature of its offering and its specific pricing model. Many alternatives primarily offer static calendar displays or provide data through less flexible means than a dedicated API.

Chabad.org Jewish Calendar

The Chabad.org Jewish Calendar is a comprehensive online resource offering extensive Jewish calendar information, including holidays, Shabbat times, and date conversions. While it provides a wealth of information, its primary mode of access is through its website. It does not offer a publicly documented API for programmatic access to its data in the same way Hebcal does. Therefore, direct pricing comparison for API usage is not applicable. For non-commercial, manual data retrieval or simple display, Chabad.org is effectively free, similar to Hebcal's non-commercial web interface.

MyZmanim

MyZmanim is another prominent resource for Jewish prayer times (Zmanim) and calendar information, known for its accuracy and detailed calculations based on various halachic opinions. MyZmanim also offers API access, primarily for Zmanim data. Like Hebcal, MyZmanim offers free access for personal, non-commercial use, often through their website or basic integrations. For commercial use or higher volume access, MyZmanim typically operates on a custom or subscription-based model, where pricing is determined by the scope of usage and features required. This makes its commercial pricing model more directly comparable to Hebcal's custom enterprise approach, requiring direct inquiry for specific costs.

JewishGen Calendar

The JewishGen Calendar is part of the broader JewishGen platform, primarily focused on Jewish genealogy. It provides tools for date conversion and historical calendar lookups. Similar to Chabad.org, JewishGen primarily offers its calendar services through its web interface rather than a dedicated, documented API for developers. Its use is generally free for personal and genealogical research. Therefore, it does not present a direct API pricing alternative to Hebcal for programmatic integration.

General Comparison

• Free Tier Accessibility: Hebcal's free tier for personal and non-commercial use is a significant advantage, making it accessible for a wide range of developers and small projects without upfront cost. This aligns with many other free-to-use informational Jewish calendar resources.
• Commercial Flexibility: The custom enterprise pricing model of Hebcal allows for highly tailored solutions, which can be beneficial for businesses with unique requirements or very specific usage patterns. This contrasts with some API providers who might offer tiered, fixed-price plans that may not perfectly align with a business's actual needs or scale.
• API Focus: Hebcal's strong emphasis on a developer API (as evidenced by its dedicated developer documentation) gives it an edge for programmatic integration compared to alternatives that are primarily web-based resources.
• Transparency: The lack of public fixed pricing for commercial use means less upfront transparency for businesses exploring options. However, this is a common model for specialized B2B APIs where usage varies widely. Developers often use services like Stripe's pricing page for comparison on how other APIs structure their commercial offerings, which often involve transaction-based or volume-based fees.

In summary, Hebcal's pricing strategy prioritizes free access for non-commercial users while offering a flexible, negotiated model for commercial entities. This approach positions it well for developers seeking a dedicated API for Jewish calendar data, contrasting with alternatives that may be excellent resources but lack the same level of programmatic access or offer different commercial models.