Understanding The Particle Bundler

The Particle Bundler is Particle Network's in-house and open-source bundler implementation, reliably facilitating close to 1 million UserOperations across the EVM ecosystem. The Particle Bundler is automatically used natively within Particle's various AA SDKs, although it can also be used on its own, for free, through the open Particle Bundler RPC. The Particle Bundler has been proven to be a highly efficient and robust Bundler implementation capable of large-scale utilization of account abstraction. The Particle Bundler has been battle-tested by acting as the primary infrastructure component driving some of the ecosystem's largest AA-centric growth campaigns.

This document will briefly describe how you can leverage the Particle Bundler on its own through its public RPC endpoint.


Take a look at the repository for Particle Bundler :arrow-right: https://github.com/Particle-Network/particle-bundler-server


Available methods

The Particle Bundler is open for use through its public RPC endpoint, which is: https://bundler.particle.network, with an optional path parameter of chainId.

At the moment, this RPC contains the standard bundler methods of:

  • eth_supportedEntryPoints
  • eth_estimateUserOperationGas
  • eth_sendUserOperation
  • eth_getUserOperationByHash
  • eth_getUserOperationReceipt

All of these can be called through standard RPC requests without any authentication required, as shown in the example below:

  "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"
  "id": 1695717470,
  "jsonrpc": "2.0",
  "chainId": 80001


Supported chains

Currently, the Particle Bundler supports every chain available within Particle's Smart Wallet-as-a-Service. For a complete list of all chains supported, AA or not, look at Network Coverage. Otherwise, the following chains are supported by the Particle Bundler:

  • Ethereum Mainnet
    • Ethereum Goerli
    • Ethereum Sepolia
  • Polygon Mainnet
    • Polygon Mumbai
  • Optimism Mainnet
    • Optimism Goerli
  • Scroll Mainnet
    • Scroll Sepolia
  • Linea Mainnet
    • Linea Testnet
  • Base Mainnet
    • Base Goerli
  • Mantle Mainnet
    • Mantle Testnet
  • Taiko Katla
  • Avalanche Mainnet
    • Avalanche Fuji
  • BNB Chain Mainnet
    • BNB Chain Testnet
  • opBNB Mainnet
    • opBNB Testnet
  • COMBO Testnet
  • PGN Mainnet
    • PGN Testnet
  • Gnosis Mainnet
    • Gnosis Testnet
  • Astar zkEVM Testnet
  • X1 Testnet
  • Viction Mainnet
    • Viction Testnet
  • Moonbeam
    • Moonriver
    • Moonbase
  • Polygon zkEVM Mainnet
    • Polygon zkEVM Testnet
  • Lumoz zkEVM Testnet
  • ReadON Testnet
  • ZetaChain Mainnet
    • ZetaChain Testnet
  • Ancient8 Testnet
  • ZKFair Mainnet
    • ZkFair Testnet
  • Berachain Testnet
  • Blast Testnet
  • MAP Protocol Mainnet
    • MAP Protocol Testnet
  • Merlin Mainnet
    • Merlin Testnet
  • LumiBit Testnet
  • BEVM Canary Mainnet
    • BEVM Canary Testnet
  • BΒ² Testnet
  • Core Mainnet
    • Core Testnet


Interactive API examples

For a full list of interactive API request examples alongside parameter descriptions for each endpoint, head over to Bundler RPC within the SDKs & APIs section of the documentation, or choose your desired endpoint below:

Web3 API Cards


Returns a detailed object containing specific transaction details for a given user operation hash.



Returns a user operation object corresponding with a specific hash.



Pushes a signed user operation to the network.



Takes a partial user operation object and returns detailed gas estimates.



Teturns a list of EntryPoint addresses supported by the Particle Bundler.