MetaMask Internal JSON-RPC Error: How to Fix It

Easy 5-15 minutes Medium Severity Verified June 2026
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Error Code
Internal JSON-RPC Error
Brand
MetaMask
Product Type
crypto_wallet
Severity
Medium
DIY Difficulty
Easy
Estimated Fix Time
5-15 minutes
The MetaMask Internal JSON-RPC Error occurs when your wallet cannot communicate properly with the blockchain network's RPC endpoint. This error typically prevents transactions from processing and blocks access to DeFi applications.
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Tools You'll Need

How to Fix Error Code Internal JSON-RPC Error

  1. Refresh the Browser Page

  2. Switch to a Different RPC Network

  3. Reset Network Connection

    This will clear your transaction history but will not affect your funds or recovery phrase

  4. Add a Custom RPC Endpoint

    Only use trusted RPC providers to avoid security risks

  5. Clear Browser Cache and Data

    This will log you out of all websites in your browser

  6. Disable Browser Extensions

  7. Update MetaMask Extension

  8. Try Incognito/Private Mode

    You'll need to manually connect MetaMask to websites in incognito mode
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When to Call a Professional

Contact MetaMask support if the error persists after trying all steps, especially if you suspect your wallet has been compromised or if you're unable to access your funds after 24 hours.

Frequently Asked Questions

What causes MetaMask JSON-RPC errors?
JSON-RPC errors are typically caused by network congestion, RPC endpoint failures, browser cache issues, or conflicts with other extensions. They prevent MetaMask from communicating with the blockchain.
Will I lose my crypto if I get this error?
No, your cryptocurrency is stored on the blockchain, not in MetaMask itself. The error only affects your ability to interact with the network temporarily. Your funds remain safe.
How do I know if the RPC endpoint is down?
Check status pages for major RPC providers like Infura or Alchemy, or try switching to a different network. If other users report similar issues on social media or forums, it's likely a provider issue.
Can I use MetaMask on mobile if desktop has RPC errors?
Yes, try the MetaMask mobile app as it uses different network connections. You can import your wallet using your seed phrase, though both versions will access the same blockchain data.
How long do JSON-RPC errors typically last?
Most errors resolve within minutes to hours. Network-wide issues may last longer, but switching to alternative RPC endpoints usually provides immediate relief.

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