chiru-labs/ERC721A

Health v2 · maintenance only

Adoption not part of the score

2526 stars · 815 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

ERC721A is a Solidity smart contract library providing a fully compliant IERC721 (NFT) implementation optimized for significant gas savings when minting multiple NFTs in a single transaction. It was created by the Azuki team (Chiru Labs) and is distributed via npm for use in Ethereum smart contract projects.

Use cases

• mint multiple NFTs in one transaction with lower gas costs
• implement an ERC721-compliant NFT contract in Solidity
• build an NFT collection drop contract
• reduce gas fees for large-scale NFT mints
• create upgradeable NFT contracts with ERC721A-Upgradeable

When to choose

• you are deploying an NFT contract where users commonly mint several tokens per transaction
• you want a battle-tested, widely adopted ERC721 implementation with gas optimizations
• you need OpenZeppelin-compatible ERC721 with extension support

When to avoid

• your use case mints only one token at a time, where gas savings are minimal
• you need per-token ownership tracking to be cheap at scale, since batch minting trades off higher costs for later owner-of queries
• you require a non-Ethereum EVM standard or a different token standard like ERC1155

Facets

library · maturity stable

sdk developer-tools blockchain developer-tools cross-platform solidity erc721 nft smart-contracts gas-optimization ethereum web3 cryptocurrency

Member repositories

For agents

markdown · JSON · MCP: product_card(name="chiru-labs/ERC721A")