# Building with Confidence on Mastercard Developers
source: https://developer.mastercard.com/blog/maximize-developer-experience/index.md

Authors: Charlie Brady. Mastercard Developers provides a powerful suite of APIs and tools that support a wide range of digital experiences including secure payments, advanced analytics, and risk solutions. But that's not all our platform has to offer. Whether you're just getting started or looking to deepen your API integration expertise, here are five practical ways to get the most out of the Mastercard Developers capabilities. 1. Explore the Full Breadth of Available APIs Most customers start their Mastercard Developers journey by integrating with the API that meets their primary business need. However, many of the strongest solutions built with Mastercard services come from combining capabilities that work well together, helping build future proof solutions and create richer, more seamless user journeys. For example, customers working with international payouts can combine Cross Border Services with Account Validation to ensure funds are sent efficiently and to verified destinations. Customers can also enhance their payout workflow by pairing Cross Border Services with the Currency Conversion Calculator to give users clarity and transparency over foreign exchange rates. Loyalty focused solutions can also benefit from complementary services, such as pairing Loyalty Management with Places API to add merchant and location context to rewards programs. These examples illustrate how APIs can complement each other to build even more impactful solutions. Explore what's possible by browsing our Products grid and API documentation. Even better, connect to the Mastercard Developers Agent Toolkit and let your favorite AI assistant recommend new API solutions tailored to your specific use case. 2. Integrate with the Agent Toolkit Our Agent Toolkit gives AI agents direct access to search and retrieve information from Mastercard's API documentation and integration guides. Built on the Model Context Protocol (MCP), the toolkit enables AI agents to efficiently discover available services, navigate through up to date product documentation and understand integration requirements. Our MCP server exposes Mastercard Developers documentation as a queryable resource. When you ask your agent about Mastercard APIs, our MCP server returns the necessary information. Instead of manually searching through webpages, guides and endpoints, your AI agent can locate exactly what you need and can even help generate code in line with Mastercard best practices. Real-world example: Imagine you are a fintech building a digital wallet that needs tokenization, fraud detection, and payment processing. With the Mastercard MCP server, your agent can navigate through all available documentation to identify which APIs you need, understand how they work together, access integration patterns specific to digital wallet use cases, and support code generation. You can discover how the assistant will handle requests for rapid prototyping, service discovery and code generation in our extensive guide. 3. Use the Mastercard Developers API to Manage Projects Programmatically The Mastercard Developers API is one of the platform's most powerful efficiencies - it's essentially an API for working with the platform itself. It allows you to manage your project, credentials and workflows entirely through API calls instead of relying solely on manual actions through the UI. There are two key main use cases: Streamlining Customer Onboarding: If you're a partner who provisions Mastercard services for your own customers, such as Open Finance resellers, you can use the Mastercard Developers API, specifically the create project endpoint, to bulk generate new projects and configurations instead of creating them manually. This reduces the operational burden of large scale onboarding, minimize manual errors, and accelerates time to value for your customers. Automated Key Management: Automate your entire key management lifecycle, from generation to rotation, eliminating the risk of expired credentials breaking your integrations. This ensures that keys remain up to date and prevents unexpected outages caused by expired credentials. The Mastercard Developers API is particularly useful for teams working at scale or organizations that need to manage multiple integrations across different projects. You can learn more about the Mastercard Developers API and its use cases here. 4. Leverage Comprehensive Testing Solutions Testing is the foundation of every successful integration. Before going live in Production, you need confidence that your implementation behaves exactly as expected. Mastercard Developers provides dedicated Sandbox keys that give you instant access to an API Sandbox environment. This Sandbox environment mirrors the live Production environment, allowing you to test your integrations safely without any risk to real transactions or data. Here is how we make testing easy for you: Instant access: You can begin testing as soon as your create a Project. Most services offer dedicated Sandbox keys instantly, though a select few require additional approval. Testing with API Interface Tools: Consider using API interface tools like Insomnia or Postman to test your Sandbox keys and data. These tools make it easy to experiment with API calls, inspect responses, and debug issues without writing code first. MTF pre-Production environment: Beyond Sandbox, a pre-Production environment called MTF (Mastercard Test Facility) is available for specific APIs, such as MATCH Pro and MDES. While Sandbox provides an isolated testing environment with synthetic data, MTF offers a more Production-like environment for end-to-end testing. Test cards and synthetic data: For payment related APIs, you can find specific test card numbers (PANs) to use in your Sandbox requests. There isn't a generic set of test cards that works across all products. Each API has its own testing resources tailored to its functionality. In some cases, a Mastercard representative will work with you directly to configure specific cards for your testing needs. 5. Engage with the Developer Community Building a solution on Mastercard Developers does not need to happen in isolation. The Developers Forum is a valuable resource where fellow developers share insights, troubleshooting tips, and integration experiences. Our in-house engineering team closely monitors and responds to your questions. Every inquiry is reviewed, and you'll receive accurate guidance and recommendations for your specific use case from the experts who understands the platform inside and out. Whether you're resolving an integration issue, seeking architectural direction, or evaluating which APIs suit your project, the community---supported directly by Mastercard's development team---is ready to help. Reach out whenever you need clarity or expert input to move forward with confidence. Maximizing the Mastercard Developers platform isn't just about writing code, it's also about leveraging all the resources, tools, and capabilities at your disposal. Each of these practices is intended to help you build better, more efficient, and more innovative solutions. If you need guidance on how to integrate with or use any of the above capabilities, you can contact our API Support team or post your question on the Developers Forum.