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moralis-data-api Query Web3 blockchain data from Moralis API. Use when user asks about wallet data (balances, tokens, NFTs, transaction history, profitability, net worth), token data (prices, metadata, DEX pairs, analytics, security scores), NFT data (metadata, transfers, traits, rarity, floor prices), DeFi positions, entity/label data for exchanges and funds, or block and transaction data. Supports EVM chains (Ethereum, Polygon, BSC, Arbitrum, Base, Optimism, Avalanche, etc.) and Solana. NOT for real-time streaming - use moralis-streams-api instead.
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100 fichiers name moralis-data-api description Query Web3 blockchain data from Moralis API. Use when user asks about wallet data (balances, tokens, NFTs, transaction history, profitability, net worth), token data (prices, metadata, DEX pairs, analytics, security scores), NFT data (metadata, transfers, traits, rarity, floor prices), DeFi positions, entity/label data for exchanges and funds, or block and transaction data. Supports EVM chains (Ethereum, Polygon, BSC, Arbitrum, Base, Optimism, Avalanche, etc.) and Solana. NOT for real-time streaming - use moralis-streams-api instead. version 1.3.1 license MIT compatibility Requires curl for API calls. Requires MORALIS_API_KEY env var for authentication. metadata {"author":"MoralisWeb3","homepage":"https://docs.moralis.com","repository":"https://github.com/MoralisWeb3/onchain-skills","openclaw":{"requires":{"env":"[Truncated]","bins":"[Truncated]"},"primaryEnv":"MORALIS_API_KEY"}} allowed-tools Bash Read Grep Glob
CRITICAL: Read Rule Files Before Implementing
The #1 cause of bugs is not reading the endpoint rule file before writing code.
For EVERY endpoint:
Read rules/{EndpointName}.md
Find "Example Response" section
Copy the EXACT JSON structure
Note field names (snake_case), data types, HTTP method, path, wrapper structure
Reading Order:
This SKILL.md (core patterns)
Endpoint rule file in rules/
Pattern references in references/ (for edge cases only)
Setup
API Key (optional)
Never ask the user to paste their API key into the chat. Instead:
Check if MORALIS_API_KEY is set in the environment (try running [ -n "$MORALIS_API_KEY" ] && echo "API key is set" || echo "API key is NOT set").
If not set, offer to create the .env file with an empty placeholder: MORALIS_API_KEY=
Tell the user to open the .env file and paste their key there themselves.
Let them know: without the key, you won't be able to test or call the Moralis API on their behalf.
If they don't have a key yet, point them to admin.moralis.com/register (free, no credit card).
Environment Variable Discovery
The .env file location depends on how skills are installed:
Create the .env file in the project root (same directory the user runs Claude Code from). Make sure .env is in .gitignore.
Verify Your Key
curl "https://deep-index.moralis.io/api/v2.2/0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045/balance?chain=0x1" \
-H "X-API-Key: $MORALIS_API_KEY "
Base URLs
API Base URL EVM https://deep-index.moralis.io/api/v2.2Solana https://solana-gateway.moralis.io
Authentication
All requests require: X-API-Key: $MORALIS_API_KEY
Quick Reference: Most Common Patterns
Data Type Rules Field Reality NOT block_numberDecimal 12386788 Hex 0xf2b5a4 timestampISO "2021-05-07T11:08:35.000Z" Unix 1620394115 balanceString "1000000000000000000" Number decimalsString or number Always number
Block Numbers (always decimal) block_number : 12386788 ;
block_number : "12386788" ;
Timestamps (usually ISO strings) "2021-05-07T11:08:35.000Z" ;
Balances (always strings unless its a property named "formatted" eg. balanceFormatted, BigInt) balance : "1000000000000000000" ;
Response Patterns Pattern Example Endpoints Direct array [...] getWalletTokenBalancesPrice, getTokenMetadata Wrapped { result: [] } getWalletNFTs, getWalletTransactions Paginated { page, cursor, result } getWalletHistory, getNFTTransfers
const data = Array .isArray (response) ? response : response.result || [];
Common Field Mappings token_address → tokenAddress
from_address_label → fromAddressLabel
block_number → blockNumber
receipt_status : "1" → success, "0" → failed
possible_spam : "true" /"false" → boolean check
Common Pitfalls (Top 5)
Block numbers are decimal, not hex - Use parseInt(x, 10), not parseInt(x, 16)Timestamps are ISO strings - Use new Date(timestamp).getTime()Balances are strings - Use BigInt(balance) for mathResponse may be wrapped - Check for .result before .map()Path inconsistencies - Some use /wallets/{address}/..., others /{address}/...
Pagination Many endpoints use cursor-based pagination:
curl "...?limit=100" -H "X-API-Key: $KEY "
curl "...?limit=100&cursor=<cursor_from_response>" -H "X-API-Key: $KEY "
Testing Endpoints ADDRESS="0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"
CHAIN="0x1"
curl "https://deep-index.moralis.io/api/v2.2/${ADDRESS} /balance?chain=${CHAIN} " \
-H "X-API-Key: $MORALIS_API_KEY "
curl "https://deep-index.moralis.io/api/v2.2/erc20/0x6B175474E89094C44Da98b954EedeAC495271d0F/price?chain=${CHAIN} " \
-H "X-API-Key: $MORALIS_API_KEY "
curl "https://deep-index.moralis.io/api/v2.2/${ADDRESS} ?chain=${CHAIN} &limit=5" \
-H "X-API-Key: $MORALIS_API_KEY " | jq '.result'
Quick Troubleshooting Issue Cause Solution "Property does not exist" Field name mismatch Check snake_case in rule file "Cannot read undefined" Missing optional field Use ?. optional chaining "blockNumber is NaN" Parsing decimal as hex Use radix 10: parseInt(x, 10) "Wrong timestamp" Parsing ISO as number Use new Date(timestamp).getTime() "404 Not Found" Wrong endpoint path Verify path in rule file
Performance & Timeouts Most endpoints respond quickly under normal conditions. Response times can vary based on wallet activity volume, chain, and query complexity.
Recommended client timeouts:
Simple queries (balance, price, metadata): 10s
Complex queries (wallet history, DeFi positions): 30s
Large wallets with extensive transaction histories may take longer — use pagination with reasonable limit values.
Default Chain Behavior EVM addresses (0x...): Default to Ethereum (chain=0x1) unless specified.
Solana addresses (base58): Auto-detected and routed to Solana API.
Supported Chains EVM (40+ chains): Ethereum (0x1), Polygon (0x89), BSC (0x38), Arbitrum (0xa4b1), Optimism (0xa), Base (0x2105), Avalanche (0xa86a), and more.
Endpoint Catalog Complete list of all 136 endpoints (102 EVM + 34 Solana) organized by category.
Wallet Balances, tokens, NFTs, transaction history, profitability, and net worth data.
Token Token prices, metadata, pairs, DEX swaps, analytics, security scores, and sniper detection.
NFT NFT metadata, transfers, traits, rarity, floor prices, and trades.
DeFi DeFi protocol positions, liquidity, and exposure data.
Entity Labeled addresses including exchanges, funds, protocols, and whales.
Price Token and NFT prices, OHLCV candlestick data.
Blockchain Blocks, transactions, date-to-block conversion, and contract functions.
Discovery Trending tokens, blue chips, market movers, and token discovery.
Other Utility endpoints including API version, endpoint weights, and address resolution.
Solana Endpoints Solana-specific endpoints (24 native + 10 EVM variants that support Solana chain = 34 total).
Reference Documentation
See Also
Endpoint rules: rules/*.md files
Streams API: @moralis-streams-api for real-time events
