104. Pimlico - ERC-4337 Infrastructure
Basic Information
| Item | Details |
|---|---|
| Name | Pimlico |
| Type | ERC-4337 Account Abstraction Infrastructure Platform |
| Core Services | Bundler + Paymaster |
| Technical Standard | ERC-4337 |
| Open Source Projects | Alto Bundler, ERC-20 Paymaster |
| Positioning | The Most Popular Account Abstraction Infrastructure Platform Globally |
| Relationship with OpenClaw | Underlying AA Infrastructure Relied Upon by CoinFello/MetaMask |
Product Description
Pimlico claims to be the most popular account abstraction infrastructure platform globally, driving Ethereum's transition to ERC-4337 smart accounts. Pimlico provides two core services: Bundler and Paymaster, responsible for bundling and submitting UserOperations to the blockchain, and supporting Gas fee sponsorship and ERC-20 token payments for Gas. As a key infrastructure in the ERC-4337 ecosystem, Pimlico offers underlying services for upper-layer applications like MetaMask Smart Accounts Kit.
Core Features/Characteristics
- Bundler Service:
- Collects ERC-4337 UserOperations
- Bundles and submits them to the blockchain
- Ensures efficient and reliable transaction inclusion
- Alto Bundler (open-source implementation)
- Paymaster Service:
- Verifying Paymaster: Verifies and sponsors transactions
- ERC-20 Paymaster: Pays Gas using ERC-20 tokens
- Flexible Gas sponsorship strategies
- Developer Tools:
- permissionless.js: Comprehensive account abstraction SDK
- Supports multiple Smart Account implementations
- Detailed documentation and tutorials
- Multi-Chain Support: Supports Ethereum and major L2s
Business Model
- Bundler service API fees
- Paymaster service fees
- Enterprise-level SLA support
- Open-source core + commercial service model
Target Users
- Wallet developers (e.g., MetaMask)
- DApp developers requiring account abstraction
- AI agent platforms needing Bundler and Paymaster
- Enterprise-level blockchain applications
Competitive Advantages
- Market Leadership: The most popular AA infrastructure platform
- Open-Source Core: Alto Bundler is open-source and transparent
- MetaMask Ecosystem: MetaMask Bundler method documentation references Pimlico
- Full-Stack AA: Complete solution with Bundler + Paymaster + SDK
- Reliability: High availability guarantees as critical infrastructure
Market Performance
- Listed by Alchemy as a leading Bundler service
- Alto Bundler maintained as open-source on GitHub
- ERC-20 Paymaster widely referenced
- permissionless.js becoming the mainstream AA development SDK
- MetaMask documentation references Pimlico's Bundler service
Relationship with OpenClaw Ecosystem
Pimlico is a foundational component of OpenClaw's on-chain transaction infrastructure chain:
- CoinFello Dependency: CoinFello uses ERC-4337 via MetaMask Smart Accounts Kit, relying on Bundler and Paymaster services
- Gas Sponsorship: Pimlico's Paymaster enables AI agents to perform on-chain operations without holding ETH
- Transaction Bundling: Bundler service reliably submits AI agents' UserOperations to the chain
- ERC-20 Gas Payments: AI agents can pay Gas using stablecoins (e.g., USDC), simplifying agent economics
- Infrastructure Reliability: Ensures the reliability of OpenClaw agents' on-chain operations as an underlying service
- Tech Stack Position: OpenClaw → CoinFello → MetaMask Smart Accounts Kit → Pimlico (Bundler/Paymaster) → Blockchain
References
External References
Learn more from these authoritative sources: