# Introduction This is the documentation for Node RPC provider. Node RPC is Cost-effective and reliable Ethereum and Polygon JSON-RPC provider, offering a competitive solution for developers seeking an affordable alternative. Currently we are supporting all standard Ethereum API methods. Examples in this documentation use public endpoints. Ideally, for your own projects, you should use your own API endpoint, which you can generate for free when connecting with your wallet [here](https://www.noderpc.xyz/). Our public endpoints are: * url: `https://api.noderpc.xyz/rpc-mainnet/public` Public endpoint for **Ethereum mainnet** * url: `https://api.noderpc.xyz/rpc-polygon-pos/public` Public endpoint for **Polygon mainnet** * url: `https://api.noderpc.xyz/rpc-sepolia/public` Public endpoint for **Sepolia testnet** For demonstration purposes, we are using well-known web3 library [ethers](https://github.com/ethers-io/ethers.js/) in our examples. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.noderpc.xyz/node-rpc/introduction.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.