Alchemy Web3
https://github.com/alchemyplatform/alchemy-web3- Category
- Crypto
- Rank
- No. 1035Tools index
- Pricing
- Open Source
- Type
- TOOL
- Builder
- alchemyplatform
- GitHub
- 249 stars
- Latest release
- v1.4.7
- Date
About
Drop-in Web3.js replacement with Alchemy integration — better retry logic, websockets, and enhanced APIs for Ethereum apps.
What it does
Alchemy Web3 is a TypeScript client that keeps the familiar Web3 interface while routing reads through Alchemy and account or signing requests through an injected or custom wallet provider. It supports HTTP and WebSocket connections, plus typed access to transfers, token data, NFTs, transaction receipts, and private transactions.
Why it's ranked here
This remains useful for applications already built around Web3 because migration requires little interface change and the client handles several awkward transport concerns. The verdict is mixed for new work: the repository explicitly sits in maintenance mode, receives best-effort updates, and directs developers toward a newer SDK with stronger typing, abstractions, and documentation.
What's good
Read and write routing separates hosted queries from wallet-controlled signing without automatically requesting account access. Rate-limit retries expose retry count, interval, and jitter controls. WebSocket reconnection can recover subscription events from recent blocks. The library also accepts custom write providers and offers both promises and callbacks.
Tradeoffs
Maintenance mode is the central constraint, especially for projects expecting new features or active support. Reconnected subscriptions can still miss events after an outage longer than 120 blocks, and outgoing WebSocket requests can still disappear. Alchemy access requires an account, wallet permissions remain the application's responsibility, and the enhanced APIs bind the client to Alchemy services.
How to use it well
Use it when maintaining a Web3-based Ethereum application that needs Alchemy reads, wallet-backed writes, enhanced data endpoints, or resilient subscriptions with minimal migration work. Configure retry behavior, retain normal network error handling, and request wallet access only near a signing action. For new applications seeking richer abstractions and current documentation, choose the successor SDK instead.
Technical notes+
package.json publishes @alch/alchemy-web3 as side-effect-free ESM and CommonJS builds with declarations from the ESM output. src/index.ts constructs AlchemyWeb3, patches subscriptions and custom RPC support, exposes typed Alchemy JSON-RPC and REST methods, converts token balances from hexadecimal to decimal strings, and blocks replacement of the main provider while permitting setWriteProvider. src/web3-adapter/alchemyContext.ts selects HTTP or WebSocket transport from the URL and supplies a Node-specific WebSocket constructor with 100 MB frame limits. src/web3-adapter/alchemySendHttp.ts classifies HTTP 429 responses as rate limits. src/types.ts defines JSON-RPC request, response, provider, middleware, and subscription shapes, while src/alchemy-apis/types.ts covers transfers, tokens, NFTs, receipts, and private transaction preferences.
Observed
- License
- MIT
- Primary language
- TypeScript
- Package
- Published as @alch/alchemy-web3 through npm or Yarn
- Browser distribution
- Minified and unminified CDN bundles are documented
- Interface
- JavaScript and TypeScript library with Web3-compatible, JSON-RPC, REST, and subscription APIs
- Module formats
- Package metadata exposes ESM, CommonJS, and TypeScript declarations
- Platform support
- Code provides browser and Node.js WebSocket handling
- Lifecycle
- Repository documentation marks the library as maintenance mode with best-effort updates
Read from README.md, package.json, src/index.ts, src/types.ts, src/version.ts, src/util/hex.ts, src/util/jsonRpc.ts, src/util/promises.ts, src/alchemy-apis/types.ts, src/types/web3-eth-abi.d.ts, src/web3-adapter/customRPC.ts, src/web3-adapter/alchemySend.ts, src/web3-adapter/httpProvider.ts, src/web3-adapter/alchemyContext.ts, src/web3-adapter/alchemySendHttp.ts.
What it can do
Connect to Ethereum blockchain with enhanced reliability
Ethereum network endpoint and configuration → Stable blockchain connection with improved retry logic
Establish real-time WebSocket connections to Ethereum
WebSocket endpoint and subscription parameters → Live blockchain data stream
Query Ethereum blockchain data with enhanced APIs
Blockchain query parameters and filters → Formatted blockchain data and transaction information
Send transactions to Ethereum network
Transaction data and wallet credentials → Transaction hash and confirmation status
Subscribe to blockchain events and logs
Event filter criteria and contract addresses → Real-time event notifications and log data
Interact with smart contracts
Contract ABI, address, and method parameters → Contract execution results and state changes
Tags
Tech Stack
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Editorially curated, with community endorsements as a secondary signal. Corrections welcome.