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Test EVM transactions, optimize gas fees and identify security flaws
Nov 27, 2025 • 6 min
Testing blockchain applications should be safe, predictable, and free from financial risk. Testnets make this possible by mirroring real blockchain behavior using test coins with no real-world value. This allows teams to build, experiment, and refine their applications before anything goes live on mainnet.
Crypto APIs provides a structured approach to the full development cycle. The platform includes a dedicated free plan built specifically for testnet usage, while also offering mainnet access through paid plans. Developers can run end-to-end tests, validate full workflows, and prepare production-ready logic long before moving to live environments.
This guide explains how Crypto APIs positions testnet development as the first step in a smooth progression from early testing to mainnet readiness, supported by flexible plan upgrades and Pay-As-You-Go credit extensions.
Testnets serve one primary purpose: giving developers a safe environment to test without real financial consequences. They operate like real blockchains but rely on test coins that cannot be transferred or used outside the testnet environment.
For developers, this means the ability to:
Crypto APIs structures its free plan around early development and testing, giving developers access to both testnet and mainnet networks. This allows teams to keep most of their experimentation on testnets while still having the flexibility to interact with mainnet when needed, ensuring a smooth path toward full production readiness.
The Crypto APIs free plan is built specifically for developers who are actively testing or experimenting across multiple blockchains. It includes:
The goal is to give teams everything required to build early versions of their applications while keeping all activity confined to testnets. There is no risk, no real funds involved and no need to commit to production usage until the application is fully validated.
Crypto APIs supports a broad collection of testnets that reflect modern blockchain usage.
Supported testnets include:
This multichain coverage gives teams the ability to test everything from wallets and UTXO flows to smart contracts, tokens, fee calculations, callbacks, and cross-chain logic in a single environment.
Because Crypto APIs follows a consistent API structure across supported blockchains, testing feels familiar regardless of the network. Developers and teams use testnets for:
All of this can be tested as many times as needed since only testnet networks are used.
Crypto APIs provides a well-structured progression from testing to production. It is intentionally not a jump but a controlled transition that aligns with real operational needs.
Use the free plan to start building your application, test workflows, and ensure everything behaves exactly as expected on testnets. This includes development, QA and internal testing.
Once you complete your initial testing on the free plan and your application is ready to operate at a larger scale, you can upgrade to the plan that best matches your organization’s needs. Crypto APIs offers several paid plans with higher credit limits and expanded capabilities, including Starter, Scale, Pro and custom enterprise options, allowing teams to choose the level of resources that aligns with their production goals.
If you are not sure how many credits your project will require, Pay-As-You-Go gives you the flexibility to continue operating without interruption. You use all credits included in your subscription plan, and once that limit is reached, any additional usage continues seamlessly and is billed only for the extra credits consumed. The intention is to ensure your business is never blocked, even when workloads exceed expectations. If you are unsure which plan or credit level is right for your organization, you can contact our sales team at [email protected] for a professional consultation tailored to your needs.
Pay-As-You-Go is particularly helpful during periods of uncertainty or growth, such as:
It gives teams a controlled cost structure while maintaining uninterrupted performance.
Organizations typically follow a structured progression when adopting Crypto APIs:
This structured flow keeps development safe and predictable while giving teams a clear roadmap from idea to production.
Crypto APIs brings together everything required for a smooth, risk-free development experience:
This combination creates a development environment where teams can experiment freely, run complete tests and prepare their applications for real-world use without pressure.
If your team is working with Ethereum Sepolia, Bitcoin Testnet, Polygon Amoy, Tron Nile, XRP Testnet, Solana Devnet or any other supported testnet, Crypto APIs offers everything needed to build, validate and refine your application with confidence. Create your Crypto APIs account, begin testing our APIs across your preferred blockchains and transition to production at the pace that aligns with your organization’s readiness.
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