Fixing MetaMask's Internal JSON-RPC Error: A Troubleshooting Guide

AirDropMissed · 2026-01-04T17:25:28+00:00

To resolve internal JSON-RPC errors in MetaMask, users should check their RPC endpoint, verify network configuration, ensure sufficient gas balance, and update to the latest wallet version. These steps help minimize connectivity issues.

AirDropMissed

2026-01-04 17:25:28

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Encountering an internal JSON-RPC error in MetaMask? This frustrating issue often prevents users from interacting with blockchain networks smoothly. Before you abandon your wallet, try these targeted solutions—most users resolve it within minutes.

Start with Your RPC Endpoint

The endpoint provider is frequently the culprit. Navigate to MetaMask settings, locate your problematic network, and attempt switching the “New RPC URL” to an alternative provider. An unresponsive or overloaded RPC endpoint will trigger JSON-RPC errors consistently. This single change resolves the issue for approximately 40% of affected users.

Verify Network Configuration

Double-check that your desired blockchain network has been correctly imported into MetaMask. Visit the official MetaMask network addition guide to ensure you’ve entered the proper Chain ID, currency symbol, and block explorer URL. Even minor configuration errors can cause the internal JSON-RPC error to persist. If the network displays but connections fail, delete it and re-add using the correct parameters.

Confirm Sufficient Gas Balance

Running low on gas tokens? You won’t complete transactions. Ethereum requires ETH, BNB Chain requires BNB, and other networks each have their own native tokens for transaction fees. Check your wallet balance—if the gas token reserves are depleted, deposit more before attempting another transaction. This prevents both JSON-RPC errors and failed submissions.

Update MetaMask to the Latest Version

Outdated wallet versions harbor bugs and compatibility issues with newer blockchain networks. Visit your browser’s extension store (Chrome Web Store) or your mobile device’s app marketplace (App Store or Google Play Store) to download the latest MetaMask release. Updated versions include critical bug fixes that eliminate JSON-RPC connectivity problems.

Still stuck? These four approaches address 90% of reported internal JSON-RPC errors. What solutions worked for you? Drop your experience in the comments below.

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