Full Ethereum JSON-RPC Support
Interact with standard Ethereum JSON-RPC methods in real time, from querying blocks and transactions to deploying and debugging contracts.
BuildBear-Specific RPC Extensions
Access exclusive RPC methods designed to supercharge your development experience. Simulate edge cases, manipulate state, and test complex scenarios all with ease.
Interactive Playground
Skip Postman or custom scripts. Send requests, view responses, and experiment instantly in a clean, developer-friendly UI.
In-Context Documentation
Every method is paired with detailed documentation, parameters, and example responses, so you can learn and build side by side.
Real-Time Feedback
Get instant validation and live responses to your requests. Perfect for debugging and exploring how different RPC calls behave.
Safe, Sandbox Environment
Test without worrying about mainnet risks or unwanted state changes. BuildBear environments are isolated, deterministic, and safe to break.
Supported JSON-RPC Methods
Explore and test all Ethereum JSON-RPC methods with our interactive playground.
Supported Networks
Available for all EVM networks provided by BuildBear Labs Sandbox