When managing multiple third-party APIs for a web application, prioritizing them effectively is essential for maintaining seamless functionality. Start by evaluating API reliability, as selecting those with high uptime and strong support ensures consistent performance. Assess the relevance of each API’s functionality to your application's core features, focusing on those that are critical for user experience. Additionally, analyze the integration complexity; opting for APIs that are easier to implement and maintain can save development time and minimize potential issues down the line. Establishing these criteria will help streamline your decision-making process and enhance your web application’s overall performance.

When working with multiple third-party APIs in a web application, I’d prioritize based on three main factors: functionality, reliability, and integration ease. First, I'd assess which APIs are essential to the core functionality of the app—these are non-negotiable and go straight to the top of the list. Next, I'd look into the reliability and performance of each API, considering both speed and uptime, because any downtime or lag will impact the user experience. Finally, I’d focus on how well the APIs integrate with the existing tech stack, preferring those that are straightforward to implement and maintain. This approach ensures I'm using the most critical, dependable, and compatible APIs first.

According to my point of view the priority should be given to the one which is easy to integrate, because sometimes integration of third party APIs are too complex and require a lot of back and forth debugging to integrate within application. By integrating the easier ones not only we will save time but also focus on the complex at a later stage thus not wasting important development time and also completing some stage of application. Also the learning from the one which we completed can be used for the complex integration.

IMHO, when dealing with long process APIs, I implement callback patterns to prevent system delays. For non-urgent operations where immediate responses aren't needed, I prefer async methods. If an API times out, I will use simple retry mechanisms in the user interface. From my experience, it's more important to have steady, reliable service than quick but unpredictable responses - I'd rather have an API that takes 1.5 seconds but works 99.9% of the time than one that responds in 0.5 seconds but fails frequently. The key is maintaining system stability while ensuring a good user experience through clear error messages and easy retry options when needed.

While working with multiple 3rd party API' in a project it's crucial to maintain the prioritised api and to start with is the alligning them with functional priorities. Then check for the reliability and resilience of the services.. few could be used as a background service with a robust retry mechanism..

Documentations reliability, complexity, health check availability, reliability history, SLAs, comparison with the competitors... Just to name a few... Sometimes there's no better alternative and you just have to live with it...

Core functionality: Prioritize APIs that are critical to the application's primary purpose. For example, if the app involves payments, the payment gateway API should be the top priority. Stakeholder requirements: Focus on APIs that align with client or business objectives.

When juggling multiple third-party APIs for a web app, prioritize based on impact, reliability, and ease of integration. First, assess which APIs directly affect core functionalities, as they’ll have the most noticeable impact on user experience. Next, evaluate reliability through performance metrics and support quality, especially if the API is critical for business continuity. Finally, consider integration complexity, favoring APIs that align well with your tech stack to save development time. This framework helps streamline choices, ensuring efficient, effective API management.

When prioritizing third-party APIs, Consider few key factors: functionality relevance, which ensures the API delivers core features required by my app; security, which ensures the API meets compliance standards and protects user data; reliability, which ensures the API provides consistent uptime and support; and ease of integration, which reduces development time and long-term maintenance issues. Balancing these components ensures that the chosen APIs meet both technical requirements and business objectives.