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Particle Bundler

The Particle Bundler is our open-source, production-ready ERC-4337 bundler.
It has already processed nearly 1M+ UserOperations across the EVM ecosystem and powers some of the largest AA campaigns in Web3.
  • Free to use via a public RPC: https://bundler.particle.network
  • Automatically included in all Particle AA SDKs
  • Proven to scale and battle-tested in live campaigns
Explore the Particle Bundler repository.

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Why use the Particle Bundler?

  • Open-source & free — no lock-in, use it standalone or with our SDKs
  • Production-grade — tested at scale with millions of UserOps
  • Full RPC support — standard bundler methods available out of the box
  • Multi-chain ready — live on every chain supported by Particle’s Smart Wallet-as-a-Service

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Available RPC Methods

The Bundler RPC endpoint: https://bundler.particle.network/{chainId?} Supported methods (no auth required):
  • eth_supportedEntryPoints
  • eth_estimateUserOperationGas
  • eth_sendUserOperation
  • eth_getUserOperationByHash
  • eth_getUserOperationReceipt
Example request:
JSON
{
  "method": "eth_sendUserOperation",
  "params": [
    {
      "sender": "0x8Fb859E944561678be40Cdd2dB16551396c0b074",
      "nonce": "0x0150",
      "initCode": "0x",
      "callData": "0x9e5d4c49000000000000000000000000329a7f8b91ce7479035cb1b5d62ab41845830ce8000000000000000000000000000000000000000000000000000000000000000100000000000000000000000000000000000000000000000000000000000000600000000000000000000000000000000000000000000000000000000000000000",
      "callGasLimit": "0xa13c",
      "verificationGasLimit": "0xe2d8",
      "maxFeePerGas": "0x7ca702cd",
      "maxPriorityFeePerGas": "0x7ca702b0",
      "paymasterAndData": "0x000031dd6d9d3a133e663660b959162870d755d4000000000000000000000000329a7f8b91ce7479035cb1b5d62ab41845830ce8000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000000416665636080709b968ebec098bf71fb0e79b3b480cc9ff809f192afb478c84ec50ad2de74b93a67860542099b11a1b5dbfa9bc21a2790c58e10015ce992a02f411b00000000000000000000000000000000000000000000000000000000000000",
      "preVerificationGas": "0x011120",
      "signature": "0x7cc0a2ae350b79c5b189bd36d55ab6a2756097d6d37537e3ec2c26daaa82c6d909fed87ff9d79a6fa127bd798126259ee72fa9395ecbeb1f70ed22ca35983aea1c"
    },
    "0x5ff137d4b0fdcd49dca30c7cf57e578a026d2789"
  ],
  "id": 1695717470,
  "jsonrpc": "2.0",
  "chainId": 80001
}

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Supported Chains

The Particle Bundler supports all chains available in Smart Wallet-as-a-Service. 👉 For the full list, see Network Coverage.

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Interactive Examples

You can try Bundler methods directly in our docs:

getUserOperationReceipt

getUserOperationByHash

sendUserOperation

estimateUserOperationGas

supportedEntryPoints