What is the cheapest paid plan for arcsecond.io?

The cheapest paid plan is the Basic Plan, priced at $10 per month. It includes 2,500 API calls and 5 GB of storage.

Does arcsecond.io offer a free trial or free tier?

Yes, arcsecond.io offers a free Developer Plan. It includes 500 API calls per month and 500 MB of data storage for personal projects and API testing.

What happens if I exceed my API call or storage limits?

If you exceed your plan's limits, you will typically need to upgrade to a higher-tier plan to continue using the service without interruption. Specific overage policies may be detailed in the arcsecond.io terms of service.

Are there any discounts for academic institutions or non-profits?

While not explicitly detailed in standard pricing, many SaaS providers offer special pricing for academic or non-profit organizations. It is recommended to contact arcsecond.io sales directly to inquire about potential discounts.

Can I pay for arcsecond.io annually instead of monthly?

Most subscription services like arcsecond.io offer both monthly and annual payment options. Annual payments often come with a discount compared to cumulative monthly payments. Check the official pricing page for confirmation.

What payment methods does arcsecond.io accept?

Generally, arcsecond.io accepts standard payment methods such as major credit cards (Visa, MasterCard, American Express). For Enterprise plans, invoicing and bank transfers might be available.

Is there a custom plan for very large organizations or observatories?

Yes, arcsecond.io offers an Enterprise Plan with custom pricing and tailored limits for API calls, storage, and support, designed for very large organizations or observatories with specific requirements.

arcsecond.io Pricing: Plans, Tiers, and Cost Examples (2026)

Pricing overview

arcsecond.io provides a tiered pricing structure designed to accommodate various usage levels, from individual researchers and students to larger astronomical institutions. The core components influencing pricing are the number of API calls and the volume of data storage required. A free Developer Plan is available, offering a baseline for exploration and small-scale projects. As usage scales, users can upgrade to paid plans that provide increased limits on API requests and storage capacity. The service aims to offer predictable monthly costs based on chosen plan tiers, with potential for custom enterprise solutions for very high-volume requirements.

The pricing model is subscription-based, with users selecting a plan that aligns with their anticipated monthly API usage and data storage needs. This approach allows users to manage costs by choosing a tier that prevents unexpected overage charges, provided their usage remains within the plan's defined limits. For detailed information on specific limits and features per plan, users can refer to the official arcsecond.io documentation.

Plans and tiers

arcsecond.io offers several distinct plans, each tailored to different user requirements regarding API access and data management. These plans are structured to provide a clear progression of capabilities and limits, ensuring users can select an option that best fits their operational scale and budget.

arcsecond.io Plan Comparison
Plan Name	Monthly Price	Key Limits	Best For
Developer Plan	Free	500 API calls/month, 500 MB storage	Individual learning, small personal projects, API evaluation
Basic Plan	$10	2,500 API calls/month, 5 GB storage	Independent researchers, small academic projects, growing personal archives
Standard Plan	$49	10,000 API calls/month, 25 GB storage	Research groups, small observatories, active data collection projects
Professional Plan	$199	50,000 API calls/month, 100 GB storage	Larger research institutions, multi-project teams, significant data archiving
Enterprise Plan	Custom	Custom API calls, custom storage, dedicated support	Large observatories, national data centers, high-volume commercial applications

Each plan includes access to core features such as astronomical data archiving, observation planning tools, and the API for accessing astronomy data. Higher-tier plans typically offer enhanced support options, greater scalability for concurrent operations, and potentially access to beta features or specialized integrations. Users considering the Enterprise Plan are encouraged to contact arcsecond.io directly for a customized quote that addresses their specific infrastructure and data volume needs.

Free tier and limits

The arcsecond.io Developer Plan serves as the primary free tier, offering essential functionalities for users to explore the platform without financial commitment. This plan is specifically designed for developers, students, and researchers who need to test API integrations, manage small datasets, or conduct preliminary studies. The free tier includes:

API Calls: Up to 500 API requests per month. This limit encompasses all interactions with the arcsecond.io API, including data retrieval, submission, and management operations.
Data Storage: Up to 500 MB of data storage. This allows users to archive a limited amount of personal observation data or store results from API queries.
Core Features: Access to the fundamental tools for astronomical data archiving and observation planning, consistent with the features available in paid plans but constrained by the usage limits.

While the Developer Plan is robust for initial exploration and small-scale projects, users should monitor their usage to avoid exceeding the monthly limits. Exceeding these limits typically requires upgrading to a paid plan to continue service without interruption. The free tier provides a valuable opportunity to understand the platform's capabilities and determine the suitability of arcsecond.io for specific use cases before committing to a paid subscription. For more details on the Developer Plan's scope, users can consult the arcsecond.io API reference.

Real-world cost examples

Understanding the practical application of arcsecond.io's pricing model can help users anticipate their monthly expenses. Here are several real-world scenarios illustrating potential costs:

Scenario 1: Student Researcher

Usage Profile: A university student working on a thesis project, performing occasional data queries from public archives and storing a small dataset of simulated observations.
API Calls: Approximately 300 calls per month for data retrieval and submission.
Data Storage: Around 200 MB for simulated data and project files.
Recommended Plan: Developer Plan (Free)
Monthly Cost: $0
Reasoning: The student's usage falls well within the free tier's limits, making it an ideal starting point.

Scenario 2: Independent Astronomer

Usage Profile: An independent researcher actively using the API to integrate astronomy data into custom analysis scripts, requiring more frequent API calls and storing several gigabytes of observational data from personal telescopes.
API Calls: Approximately 2,000 calls per month.
Data Storage: Around 3 GB for raw and processed observation data.
Recommended Plan: Basic Plan ($10/month)
Monthly Cost: $10
Reasoning: Exceeds the Developer Plan's limits for both API calls and storage, making the Basic Plan the most cost-effective option.

Scenario 3: Small Research Group

Usage Profile: A small academic research group collaborating on multiple projects, requiring frequent access to large public datasets and archiving shared observational data.
API Calls: Approximately 8,000 calls per month across the team.
Data Storage: Around 15 GB for shared project data and archives.
Recommended Plan: Standard Plan ($49/month)
Monthly Cost: $49
Reasoning: The Standard Plan accommodates the team's higher API call volume and greater storage needs, offering a balance of capacity and cost.

Scenario 4: Observatory Data Curator

Usage Profile: An observatory curating and offering access to a significant volume of astronomical data, with multiple researchers and automated systems interacting with the arcsecond.io API.
API Calls: Approximately 40,000 calls per month.
Data Storage: Around 80 GB for extensive data archives.
Recommended Plan: Professional Plan ($199/month)
Monthly Cost: $199
Reasoning: The Professional Plan provides the necessary API call and storage capacity for a larger institutional use case, supporting sustained, high-volume data operations.

These examples illustrate how different usage patterns translate into specific plan choices and associated costs. Users should regularly review their usage statistics within the arcsecond.io dashboard to ensure their chosen plan remains appropriate for their needs.

How the pricing compares

When evaluating arcsecond.io's pricing, it is useful to compare it against alternative solutions in the astronomical data management and API access landscape. While direct one-to-one pricing comparisons can be complex due to varying feature sets and service models, a general overview can highlight arcsecond.io's market position.

Many astronomical data archives, such as the Centre de Données astronomiques de Strasbourg (CDS) and the NOIRLab Astro Data Archive, primarily offer free access to public datasets. These services are typically funded by public grants and institutions, providing extensive archives without direct user fees for data access. However, they often focus on data dissemination rather than offering personal data archiving, observation planning tools, or a generalized API for private data management, which are core components of arcsecond.io's offering. Users relying solely on these free archives would need to develop their own infrastructure for personal data storage and API-driven workflows.

Another alternative is using open-source libraries like Astropy, which is a Python package for astronomy. Astropy itself is free to use and provides powerful tools for data manipulation, analysis, and access to various astronomical services. However, Astropy does not include hosted data storage or a managed API service; users are responsible for their own server infrastructure, data storage, and API development if they wish to replicate arcsecond.io's managed service features. The cost associated with Astropy would therefore be indirect, stemming from the development, deployment, and maintenance of self-hosted solutions, including server costs (e.g., from AWS EC2 pricing or Google Cloud Compute Engine pricing) and developer time.

arcsecond.io's value proposition lies in its managed service model, which bundles API access, data storage, and specialized astronomy tools into predictable subscription plans. This approach reduces the operational overhead for users, eliminating the need to manage servers, databases, or API infrastructure. For individuals or groups seeking a ready-to-use platform with integrated features for observation planning and data archiving, arcsecond.io offers a streamlined, cost-effective alternative to building and maintaining a custom solution from scratch. The free Developer Plan also provides a low-barrier entry point not typically available for comprehensive self-hosted setups.

In summary, arcsecond.io positions itself as a managed, integrated platform for astronomical data, offering a balance between the free, public-archive-only model and the fully self-hosted, open-source approach. Its tiered pricing reflects the convenience and comprehensive nature of its hosted services, making it a competitive option for users who prioritize ease of use and reduced infrastructure management.