Remote Procedure Call (RPC) providers are essential gateways for interacting with the Avalanche blockchain. They allow developers to read data, send transactions, and deploy smart contracts without running a full node. This guide explores the ecosystem of available RPC providers, helping you choose the right one for your project's needs.
Understanding Avalanche RPC Providers
The Avalanche network consists of multiple chains, each serving a specific purpose. The C-Chain (Contract Chain) runs the Ethereum Virtual Machine (EVM), making it compatible with Ethereum tools and dApps. The X-Chain (Exchange Chain) handles asset creation and trading, while the P-Chain (Platform Chain) manages network validation and subnets.
RPC providers serve as intermediaries between your application and these Avalanche chains. They offer several advantages over running your own node:
- No need for significant hardware investment
- Reduced maintenance overhead
- Built-in redundancy and load balancing
- Often include additional services like enhanced APIs
Different providers offer varying levels of service, including free tiers, premium options, and specialized features like archival data or WebSocket support.
Public API Server
Avalanche maintains a public API server that offers free access to the network. This service consists of multiple AvalancheGo nodes behind a load balancer, ensuring high availability and throughput for development purposes.
Using Public API Endpoints
The public API server provides dedicated endpoints for each Avalanche chain:
Mainnet Connections:
- C-Chain API:
https://api.avax.network/ext/bc/C/rpc - X-Chain API:
https://api.avax.network/ext/bc/X - P-Chain API:
https://api.avax.network/ext/bc/P
Fuji Testnet Connections:
- C-Chain API:
https://api.avax-test.network/ext/bc/C/rpc - X-Chain API:
https://api.avax-test.network/ext/bc/X - P-Chain API:
https://api.avax-test.network/ext/bc/P
WebSocket Support:
- Mainnet C-Chain:
wss://api.avax.network/ext/bc/C/ws - Fuji Testnet C-Chain:
wss://api.avax-test.network/ext/bc/C/ws
Supported APIs and Limitations
The public API supports most standard endpoints for X-Chain, P-Chain, and C-Chain interactions, including full archival data for the Primary Network. However, it doesn't support Index APIs, which include methods like the X-Chain's getAddressTxs.
Current limitations include:
- Maximum 40 items per batched C-Chain request
- 2048 block limit per
getLogsrequest - No support for certain specialized API methods
For applications requiring consistent node affinity, the public API supports sticky sessions through load balancer configuration. This ensures consecutive requests from the same client route to the same backend node.
Availability and Support
The public API nodes are free to use without authentication. While rate limiting exists, the thresholds are generally high enough for most development and testing purposes. For production applications with significant traffic, consider alternative providers or running your own nodes.
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Third-Party RPC Providers
Beyond the public API, numerous third-party services offer enhanced features, reliability, and specialized services for Avalanche development.
Feature-Rich Providers
Several providers offer comprehensive support across all Avalanche chains with additional features:
Allnodes provides free, privacy-focused endpoints with globally distributed infrastructure. They support C-Chain, X-Chain, and P-Chain with both HTTP and WebSocket connections.
ANKR offers standard EVM APIs alongside dedicated chain endpoints. Their service includes archive data and automatic geo-routing across multiple continents. Note their soft limit of 1 million daily requests per IP or domain.
Chainstack stands out with global distribution, cryptocurrency payment options, and 24/7 support. They provide both regional and global elastic nodes for optimal performance.
Specialized Services
Some providers focus on specific use cases or advanced features:
Moralis offers not just RPC access but a full suite of Web3 APIs including NFT, token, wallet, and blockchain data APIs, plus real-time event streaming.
Tenderly provides advanced RPC services including transaction simulation, detailed execution tracing, and gas optimization tools alongside standard node access.
Stackup specializes in account abstraction and ERC-4337 compliance, offering bundlers and paymasters for advanced smart contract functionality.
Decentralized and Privacy-Focused Options
For those prioritizing decentralization or privacy:
DRPC offers decentralized RPC nodes with balancing, unlimited compute on free tiers, and WebSocket support.
1RPC by Automata Network focuses on eliminating metadata exposure and tracking while providing free access to all Avalanche chains.
Subnet-Specific Providers
Avalanche subnets have their own dedicated RPC endpoints for specialized functionality:
Beam provides endpoints for its subnet at https://subnets.avax.network/beam/mainnet/rpc (mainnet) and https://subnets.avax.network/beam/testnet/rpc (testnet).
DeFi Kingdoms offers DFK Chain access at https://subnets.avax.network/defi-kingdoms/dfk-chain/rpc for mainnet and corresponding testnet endpoints.
Dexalot provides trading-focused subnet access at https://subnets.avax.network/dexalot/mainnet/rpc for production environments.
Implementation Considerations
When integrating an RPC provider, consider these key factors:
Reliability and Uptime: Look for providers with service level agreements and robust infrastructure if building production applications.
Performance: Consider geographic distribution and latency measurements for your target audience.
Features: Determine if you need specialized capabilities like archive data, WebSockets, or enhanced APIs.
Cost Structure: Evaluate free tiers against paid plans, considering your expected request volume and feature requirements.
Support: Assess the availability of technical support and documentation, especially for complex implementations.
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Frequently Asked Questions
What is an Avalanche RPC provider?
An Avalanche RPC provider operates servers that allow applications to communicate with the Avalanche blockchain without running a full node. They handle requests to read blockchain data, send transactions, and execute smart contracts, providing a crucial infrastructure layer for dApp development.
How do I choose the right RPC provider?
Consider your project's specific needs: transaction volume, required chains (C-Chain, X-Chain, P-Chain), need for archival data, geographic distribution, and budget. Start with free tiers for development and evaluate performance before committing to paid plans for production applications.
What's the difference between mainnet and testnet RPC endpoints?
Mainnet endpoints connect to the live Avalanche network with real economic value, while testnet endpoints (primarily Fuji Testnet) connect to practice environments with valueless test tokens. Always use testnet for development and testing before deploying to mainnet.
Can I use multiple RPC providers simultaneously?
Yes, implementing multiple providers provides redundancy and load balancing. This approach ensures your application remains functional if one provider experiences downtime or rate limiting issues.
What are the rate limits for public RPC providers?
The public Avalanche API has generous but undocumented rate limits. For high-volume applications, monitor your usage and consider alternative providers or running your own nodes if you approach these limits.
Do I need different endpoints for different Avalanche chains?
Yes, each chain (C-Chain, X-Chain, P-Chain) has dedicated endpoints. Some providers offer unified access, but most maintain separate URLs for each chain's specific API methods and functionality.