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Alchemy Web3

Interact with Alchemy's Web3 APIs for blockchain data, NFTs, tokens, transfers, and webhooks across 80+ chains.

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Interact with Alchemy's Web3 APIs for blockchain data, NFTs, tokens, transfers, and webhooks across 80+ chains.

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Install for OpenClaw

Quick setup

Download the package from Yavira.
Extract the archive and review SKILL.md first.
Import or place the package into your OpenClaw setup.

Requirements

Target platform: OpenClaw
Install method: Manual import
Extraction: Extract archive
Prerequisites: OpenClaw
Primary doc: SKILL.md

Package facts

Download mode: Yavira redirect
Package format: ZIP package
Source platform: Tencent SkillHub
What's included: README.md, SKILL.md, references/agent-workflows.md, references/chains.md, references/nft-api.md, references/node-api.md

Validation

Use the Yavira download entry.
Review SKILL.md after the package is downloaded.
Confirm the extracted package contains the expected setup assets.

Install with your agent

Agent handoff

Hand the extracted package to your coding agent with a concrete install brief instead of figuring it out manually.

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New install

I downloaded a skill package from Yavira. Read SKILL.md from the extracted folder and install it by following the included instructions. Then review README.md for any prerequisites, environment setup, or post-install checks. Tell me what you changed and call out any manual steps you could not complete.

Upgrade existing

I downloaded an updated skill package from Yavira. Read SKILL.md from the extracted folder, compare it with my current installation, and upgrade it while preserving any custom configuration unless the package docs explicitly say otherwise. Then review README.md for any prerequisites, environment setup, or post-install checks. Summarize what changed and any follow-up checks I should run.

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Trust & source

Release facts

Source: Tencent SkillHub
Verification: Indexed source record
Version: 1.0.3

Provenance

Publisher: gizmo-dev
Source page: View original listing
Canonical URL: Open canonical page

Documentation

ClawHub primary doc Primary doc: SKILL.md 27 sections Open source page

Alchemy Web3 Skill

Query blockchain data, NFTs, tokens, and transfers using Alchemy's production-grade APIs. Supports Ethereum, Polygon, Arbitrum, Base, Solana, and 80+ other chains. Built by GizmoLab — Web3 development agency specializing in dApps, smart contracts, and blockchain infrastructure.

1. Get API Key

Sign up at alchemy.com (free tier available) Create an app for your target chain Copy your API key 💡 New to Web3 development? GizmoLab offers full-stack blockchain development services.

2. Configure

# Add to ~/.openclaw/.env ALCHEMY_API_KEY=your_api_key_here # Optional: Set default chain (defaults to eth-mainnet) ALCHEMY_CHAIN=eth-mainnet

Supported Chains

ChainEndpoint PrefixEthereumeth-mainnet, eth-sepoliaPolygonpolygon-mainnet, polygon-amoyArbitrumarb-mainnet, arb-sepoliaOptimismopt-mainnet, opt-sepoliaBasebase-mainnet, base-sepoliaSolanasolana-mainnet, solana-devnetzkSynczksync-mainnetLinealinea-mainnetScrollscroll-mainnetBlastblast-mainnet Full list: alchemy.com/docs/chains

CLI Usage

# Set your API key first export ALCHEMY_API_KEY="your_key" # Use the CLI ~/.openclaw/workspace/skills/alchemy-web3/scripts/alchemy.sh <command> [options]

Commands

Get ETH Balance ./alchemy.sh balance 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 # Returns: 1234.56 ETH Get Token Balances ./alchemy.sh tokens 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 # Returns: All ERC-20 tokens held by address Get NFTs for Owner ./alchemy.sh nfts 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 # Returns: All NFTs owned by address Get NFT Metadata ./alchemy.sh nft-metadata 0x5180db8F5c931aaE63c74266b211F580155ecac8 1590 # Returns: Metadata for specific NFT Get Asset Transfers ./alchemy.sh transfers 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 # Returns: Transaction history (in/out) Get Block Info ./alchemy.sh block latest ./alchemy.sh block 12345678 Get Transaction ./alchemy.sh tx 0x123...abc Resolve ENS ./alchemy.sh ens vitalik.eth # Returns: 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 Switch Chain ./alchemy.sh --chain polygon-mainnet balance 0x... ./alchemy.sh --chain arb-mainnet nfts 0x...

Node API (JSON-RPC)

# Get ETH balance curl -X POST "https://eth-mainnet.g.alchemy.com/v2/$ALCHEMY_API_KEY" \ -H "Content-Type: application/json" \ -d '{ "jsonrpc": "2.0", "method": "eth_getBalance", "params": ["0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045", "latest"], "id": 1 }'

NFT API

# Get NFTs for owner curl "https://eth-mainnet.g.alchemy.com/nft/v3/$ALCHEMY_API_KEY/getNFTsForOwner?owner=vitalik.eth&pageSize=10" # Get NFT metadata curl "https://eth-mainnet.g.alchemy.com/nft/v3/$ALCHEMY_API_KEY/getNFTMetadata?contractAddress=0x5180db8F5c931aaE63c74266b211F580155ecac8&tokenId=1590" # Get NFTs for collection curl "https://eth-mainnet.g.alchemy.com/nft/v3/$ALCHEMY_API_KEY/getNFTsForContract?contractAddress=0xBC4CA0EdA7647A8aB7C2061c2E118A18a936f13D&limit=10"

Token API

# Get token balances curl -X POST "https://eth-mainnet.g.alchemy.com/v2/$ALCHEMY_API_KEY" \ -H "Content-Type: application/json" \ -d '{ "jsonrpc": "2.0", "method": "alchemy_getTokenBalances", "params": ["0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"], "id": 1 }' # Get token metadata curl -X POST "https://eth-mainnet.g.alchemy.com/v2/$ALCHEMY_API_KEY" \ -H "Content-Type: application/json" \ -d '{ "jsonrpc": "2.0", "method": "alchemy_getTokenMetadata", "params": ["0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48"], "id": 1 }'

Transfers API

# Get asset transfers (transaction history) curl -X POST "https://eth-mainnet.g.alchemy.com/v2/$ALCHEMY_API_KEY" \ -H "Content-Type: application/json" \ -d '{ "jsonrpc": "2.0", "method": "alchemy_getAssetTransfers", "params": [{ "fromBlock": "0x0", "toBlock": "latest", "toAddress": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045", "category": ["external", "erc20", "erc721", "erc1155"], "maxCount": "0x14" }], "id": 1 }'

Using Fetch (Node 18+)

Using Alchemy SDK

npm install alchemy-sdk import { Alchemy, Network } from 'alchemy-sdk'; const alchemy = new Alchemy({ apiKey: process.env.ALCHEMY_API_KEY, network: Network.ETH_MAINNET }); // Get NFTs const nfts = await alchemy.nft.getNftsForOwner('vitalik.eth'); console.log(nfts.ownedNfts); // Get token balances const balances = await alchemy.core.getTokenBalances('vitalik.eth'); console.log(balances); // Get transaction history const transfers = await alchemy.core.getAssetTransfers({ toAddress: '0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045', category: ['external', 'erc20'] });

Webhooks (Real-time Notifications)

Receive HTTP POST requests when onchain events happen.

Webhook Types

TypeUse CaseAddress ActivityTrack transfers to/from specific addressesNFT ActivityTrack NFT sales, transfers, mintsMined TransactionsTrack when your txs are minedDropped TransactionsGet notified if tx is droppedGas PriceAlert on gas price thresholds

Create Webhook (Dashboard)

Go to dashboard.alchemy.com/webhooks Click "Create Webhook" Select type and configure Add your endpoint URL

Webhook Payload Example

{ "webhookId": "wh_abc123", "id": "evt_xyz789", "createdAt": "2024-01-15T12:00:00.000Z", "type": "ADDRESS_ACTIVITY", "event": { "network": "ETH_MAINNET", "activity": [{ "fromAddress": "0x123...", "toAddress": "0x456...", "value": 1.5, "asset": "ETH" }] } }

Portfolio Tracker

# Get all assets for a wallet ./alchemy.sh balance 0x... # ETH balance ./alchemy.sh tokens 0x... # ERC-20 tokens ./alchemy.sh nfts 0x... # NFTs

Transaction History

# Get full tx history for address ./alchemy.sh transfers 0x... --category external,erc20,erc721

NFT Collection Analysis

# Get all NFTs in a collection ./alchemy.sh collection 0xBC4CA0EdA7647A8aB7C2061c2E118A18a936f13D

Multi-chain Query

# Check same address across chains for chain in eth-mainnet polygon-mainnet arb-mainnet base-mainnet; do echo "=== $chain ===" ./alchemy.sh --chain $chain balance 0x... done

Rate Limits

PlanCompute Units/secMonthly CUsFree330300MGrowth660UnlimitedScaleCustomCustom Most endpoints cost 1-50 CUs. Check alchemy.com/docs/rate-limits for details.

Error Handling

// Rate limited {"error": {"code": 429, "message": "Too Many Requests"}} // Invalid API key {"error": {"code": 401, "message": "Invalid API Key"}} // Invalid params {"error": {"code": -32602, "message": "Invalid params"}}

Resources

Get API Key: alchemy.com (free tier) Dashboard: dashboard.alchemy.com Docs: alchemy.com/docs SDK: github.com/alchemyplatform/alchemy-sdk-js Status: status.alchemy.com

About

Built by GizmoLab 🔧 GizmoLab is a Web3 development agency building dApps, smart contracts, and blockchain tools. 🌐 gizmolab.io — Agency services 🛠️ tools.gizmolab.io — Free blockchain dev tools 🎨 ui.gizmolab.io — Web3 UI components Need custom blockchain development? Get in touch

AI Agent Workflows

The skill is designed for both human developers AND AI agents. See references/agent-workflows.md for complete examples: Whale Tracker — Monitor large wallets for moves Portfolio Monitor — Track balances across chains NFT Floor Alert — Alert on price drops Token Change Detector — Detect incoming/outgoing tokens Gas Optimizer — Wait for low gas to transact Mint Detector — Watch for new NFT mints Dashboard Generator — Auto-generate wallet dashboards

Agent Pattern

QUERY → STORE → ANALYZE → DECIDE → ACT → REPEAT Example cron job for an agent: # Every hour, check whale activity and alert if >100 ETH moved 0 * * * * ~/.openclaw/workspace/skills/alchemy-web3/scripts/whale-tracker.sh

Package contents

Included in package

6 Docs

SKILL.md Primary doc
README.md Docs
references/agent-workflows.md Docs
references/chains.md Docs
references/nft-api.md Docs
references/node-api.md Docs