MetaMask Crypto Wallet RPC Error: Header Not Found - How to Fix It

Easy 5-15 minutes Medium Severity Verified June 2026
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Error Code
RPC Error: Header Not Found
Brand
MetaMask
Product Type
crypto_wallet
Severity
Medium
DIY Difficulty
Easy
Estimated Fix Time
5-15 minutes
The MetaMask RPC Error 'Header Not Found' occurs when your wallet loses connection to the blockchain network due to RPC node synchronization issues. This error typically prevents you from viewing balances, sending transactions, or interacting with decentralized applications.
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Tools You'll Need

How to Fix Error Code RPC Error: Header Not Found

  1. Switch to a different network and back

  2. Refresh the webpage or restart the application

  3. Change the RPC endpoint manually

    Only use trusted RPC providers to protect your wallet security and privacy

  4. Clear MetaMask cache and storage

    Write down any custom token addresses or network settings before clearing cache

  5. Check network status and wait

  6. Update MetaMask to latest version

  7. Import wallet to alternative client

    Never share your seed phrase online or with untrusted applications
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When to Call a Professional

Contact MetaMask support if the error persists after trying all steps, especially if you cannot access funds or if multiple networks show the same error. Consider consulting a blockchain developer if you're managing smart contracts or large amounts.

Frequently Asked Questions

What causes MetaMask RPC Header Not Found error?
This error occurs when MetaMask's connection to the blockchain network is disrupted, usually due to RPC node synchronization issues, network congestion, or outdated cached data.
Will I lose my crypto if I get this RPC error?
No, your cryptocurrency is safe. This is a connection issue, not a wallet problem. Your funds remain on the blockchain and can be accessed once the connection is restored.
How do I find alternative RPC endpoints for Ethereum?
Popular alternatives include Infura (infura.io), Alchemy (alchemy.com), and public endpoints like Cloudflare's. Always verify RPC providers are legitimate before using them.
Why does switching networks fix the RPC error?
Switching networks forces MetaMask to establish new RPC connections and refresh cached data. When you switch back, it often connects to a different, properly synced RPC node.
Is it safe to reset my MetaMask account to fix RPC errors?
Yes, resetting your account only clears cached data and transaction history. Your wallet, private keys, and funds remain completely safe. You'll just need to re-add custom tokens and networks.

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