{"id":1451,"date":"2025-06-10T11:11:39","date_gmt":"2025-06-10T11:11:39","guid":{"rendered":"https:\/\/nownodes.io\/blog\/?p=1451"},"modified":"2025-06-11T11:23:46","modified_gmt":"2025-06-11T11:23:46","slug":"polygon-rpc-integration-guide-how-to-add-polygon-to-a-wallet","status":"publish","type":"post","link":"https:\/\/nownodes.io\/blog\/polygon-rpc-integration-guide-how-to-add-polygon-to-a-wallet\/","title":{"rendered":"Polygon RPC Integration Guide: How to Add Polygon to a Wallet\u00a0"},"content":{"rendered":"\n<p>Today, Polygon (POL) is a highly scalable and developer-friendly blockchain network. Moreover, to enable seamless interaction between wallets and the Polygon network, integrating via\u00a0JSON-RPC\u00a0is essential. This guide will walk you through the process using\u00a0NOWNodes&#8217; Polygon RPC endpoints, covering all the necessary methods for a fully functional wallet integration.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n<h2 class=\"wp-block-heading\" id=\"step-1-set-up-polygon-rpc-endpoint\"><strong>Step 1: Set Up Polygon RPC Endpoint<\/strong><\/h2>\n\n\n<p>For the first step, before making any JSON-RPC calls, you need a working&nbsp;<strong>Polygon RPC endpoint<\/strong>&nbsp;from NOWNodes:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Polygon Mainnet RPC URL:<\/strong>https:\/\/matic.nownodes.io\/YOUR_API_KEY<\/li>\n<\/ul>\n\n\n\n<p>So, add this URL to your wallet configuration as the primary Polygon RPC provider.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>Note:<\/strong>&nbsp;Replace&nbsp;<code>YOUR_API_KEY<\/code>&nbsp;with your NOWNodes API key. If you don\u2019t have one,&nbsp;<a href=\"https:\/\/nownodes.io\/\" target=\"_blank\" rel=\"noreferrer noopener\">get it here<\/a>.<\/p>\n<\/blockquote>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n<h2 class=\"wp-block-heading\" id=\"step-2-rpc-methods-for-wallet-integration\"><strong>Step 2: RPC Methods for Wallet Integration<\/strong><\/h2>\n\n\n<p>For the second step, for a wallet to fully support Polygon, it must implement the following&nbsp;<a href=\"https:\/\/nownodes.gitbook.io\/documentation\/matic-polygon\">JSON-RPC methods<\/a>:<\/p>\n\n\n<h3 class=\"wp-block-heading\" id=\"1-account-amp-balance-management\"><strong>1. Account &amp; Balance Management<\/strong><\/h3>\n\n\n<ul class=\"wp-block-list\">\n<li>Lists wallet-controlled addresses (used for connection status)- <strong><code>eth_accounts<\/code><\/strong><\/li>\n\n\n\n<li>Retrieves the\u00a0POL balance\u00a0of a given address &#8211; <strong><code>eth_getBalance<\/code><\/strong>\u00a0<\/li>\n\n\n\n<li>Queries smart contract data (e.g., ERC-20 token balances) &#8211; <strong><code>eth_call<\/code><\/strong><\/li>\n<\/ul>\n\n\n<h3 class=\"wp-block-heading\" id=\"2-transaction-handling\"><strong>2. Transaction Handling<\/strong><\/h3>\n\n\n<ul class=\"wp-block-list\">\n<li><strong><code>eth_getTransactionCount<\/code><\/strong>&nbsp;\u2013 Gets the transaction count (nonce) for an address.<\/li>\n\n\n\n<li><strong><code>eth_estimateGas<\/code><\/strong>&nbsp;\u2013 Estimates the gas required for a transaction.<\/li>\n\n\n\n<li><strong><code>eth_sendRawTransaction<\/code><\/strong>&nbsp;\u2013 Broadcasts a signed transaction to the network.<\/li>\n\n\n\n<li><strong><code>eth_getTransactionReceipt<\/code><\/strong>&nbsp;\u2013 Checks transaction status and logs after submission.<\/li>\n<\/ul>\n\n\n<h3 class=\"wp-block-heading\" id=\"3-blockchain-data-amp-sync-status\"><strong>3. Blockchain Data &amp; Sync Status<\/strong><\/h3>\n\n\n<ul class=\"wp-block-list\">\n<li><strong><code>eth_blockNumber<\/code><\/strong>&nbsp;\u2013 Returns the latest block number.<\/li>\n\n\n\n<li><strong><code>eth_getBlockByNumber<\/code><\/strong>&nbsp;\u2013 Retrieves block details by number.<\/li>\n\n\n\n<li><strong><code>eth_syncing<\/code><\/strong>&nbsp;\u2013 Checks if the node is syncing with the network.<\/li>\n<\/ul>\n\n\n<h3 class=\"wp-block-heading\" id=\"4-realtime-updates-optional-websocketbased\"><strong>4. Real-Time Updates (Optional, WebSocket-Based)<\/strong><\/h3>\n\n\n<ul class=\"wp-block-list\">\n<li><strong><code>eth_subscribe<\/code><\/strong>&nbsp;\u2013 Subscribes to events (new blocks, pending transactions, logs).<\/li>\n\n\n\n<li><strong><code>eth_unsubscribe<\/code><\/strong>&nbsp;\u2013 Cancels an active subscription.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n<h2 class=\"wp-block-heading\" id=\"step-3-websocket-integration-for-live-features\"><strong>Step 3: WebSocket Integration for Live Features<\/strong><\/h2>\n\n\n<p>For real-time updates (e.g., instant balance changes, pending transactions), use&nbsp;NOWNodes&#8217; WebSocket endpoint:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">wss:\/\/matic.nownodes.io\/YOUR_API_KEY  <\/pre>\n\n\n\n<p><strong>Use cases:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Live transaction confirmations<\/li>\n\n\n\n<li>Instant balance refreshes<\/li>\n\n\n\n<li>Smart contract event tracking<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n<h2 class=\"wp-block-heading\" id=\"step-4-testing-amp-monitoring\"><strong>Step 4: Testing &amp; Monitoring<\/strong><\/h2>\n\n\n<p>And the last, after integration, ensure:<br>\u2705&nbsp;<strong>Fast response times<\/strong>&nbsp;from the RPC server<br>\u2705&nbsp;<strong>Accurate transaction confirmations<\/strong>&nbsp;(<code>eth_getTransactionReceipt<\/code>)<br>\u2705&nbsp;<strong>Correct gas estimations<\/strong>&nbsp;(<code>eth_estimateGas<\/code>)<br>\u2705&nbsp;<strong>Proper nonce handling<\/strong>&nbsp;(<code>eth_getTransactionCount<\/code>)<\/p>\n\n\n\n<p>In other words, NOWNodes guarantees&nbsp;<strong>99.95% uptime<\/strong>, making it ideal for production-grade wallets.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n<h5 class=\"wp-block-heading\" id=\"in-this-case-heres-example-wallet-integration-flow\">In this case, here&#8217;s <strong>example Wallet Integration Flow<\/strong><\/h5>\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li><strong>Connect Wallet<\/strong>&nbsp;\u2192&nbsp;<code>eth_accounts<\/code><\/li>\n\n\n\n<li><strong>Fetch Balances<\/strong>\u00a0\u2192\u00a0<code>eth_getBalance<\/code>\u00a0(POL) +\u00a0<code>eth_call<\/code>\u00a0(ERC-20 tokens)<\/li>\n\n\n\n<li><strong>Prepare Transaction<\/strong>&nbsp;\u2192&nbsp;<code>eth_getTransactionCount<\/code>&nbsp;(nonce) +&nbsp;<code>eth_estimateGas<\/code><\/li>\n\n\n\n<li><strong>Send Transaction<\/strong>&nbsp;\u2192&nbsp;<code>eth_sendRawTransaction<\/code><\/li>\n\n\n\n<li><strong>Confirm Transaction<\/strong>&nbsp;\u2192&nbsp;<code>eth_getTransactionReceipt<\/code><\/li>\n\n\n\n<li><strong>(Optional) Live Updates<\/strong>&nbsp;\u2192&nbsp;<code>eth_subscribe<\/code>&nbsp;(new blocks, pending txs)<\/li>\n<\/ol>\n\n\n<h2 class=\"wp-block-heading\" id=\"conclusion\"><strong>Conclusion<\/strong><\/h2>\n\n\n<p>In conclusion, integrating Polygon via NOWNodes RPC gives developers a maintenance-free solution \u2013 we handle all network upgrades and infrastructure optimizations automatically. <\/p>\n\n\n\n<p>According to optimal performance, utilizing WebSocket endpoints enables real-time data synchronization, enhancing user experience with instant updates. Therefore, NOWNodes\u2019 high-availability RPC service ensures reliable connectivity, making it an ideal choice for production-grade wallet integrations. Moreover, you would stay updated on the latest changes through NOWNodes&nbsp;<strong><a href=\"https:\/\/t.me\/nownodes\" target=\"_blank\" rel=\"noreferrer noopener\">Telegram channel<\/a><\/strong>&nbsp;while enjoying 99.95% uptime and enterprise-grade reliability.<\/p>\n\n\n\n<p><strong>Get started today and streamline your Polygon wallet integration with NOWNodes.<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Today, Polygon (POL) is a highly scalable and developer-friendly blockchain network. Moreover, to enable seamless interaction between wallets and the Polygon network, integrating via\u00a0JSON-RPC\u00a0is essential. This guide will walk you through the process using\u00a0NOWNodes&#8217; Polygon RPC endpoints, covering all the necessary methods for a fully functional wallet integration. Step 1: Set Up Polygon RPC Endpoint [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":1459,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_eb_attr":"","_lmt_disableupdate":"","_lmt_disable":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[7,62],"tags":[203,40,394,89,123],"class_list":["post-1451","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-node-guides","category-polygon","tag-api","tag-mainnet","tag-pol","tag-polygon","tag-rpc-nodes"],"blocksy_meta":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Polygon RPC Integration Guide: How to Add Polygon to a Wallet\u00a0<\/title>\n<meta name=\"description\" content=\"This guide will walk you through 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