Alchemy
Blockchain developer API for NFT collections, token contracts, owners, transfers, prices, and on-chain metadata.
Designed for web3 apps that read NFT collections by owner or contract, fetch floor prices and rarity, and pull historical token-price data.
Example Use Cases
These are the Alchemy actions Snow can use when building apps with you. Connecting an account does not make Snow run these on its own.
Tool to check if an NFT contract is marked as spam by Alchemy. Use when you need to verify the legitimacy of an NFT contract before interacting with it or displaying its assets. Returns true if the contract is flagged as spam, false if it's valid or hasn't been evaluated yet.
Tool to determine if a specific NFT contract is marked as spam by Alchemy. Use when you need to verify the legitimacy of an NFT contract address before interacting with it. Available on paid Alchemy tiers only.
Tool to get the metadata for an NFT contract including name, symbol, total supply, and token type (ERC721/ERC1155). Use when you need to retrieve comprehensive contract information such as deployer address, deployment block, OpenSea metadata, and collection details.
Retrieves historical price data for a token over a specified time range with configurable intervals. Identify the token either by symbol (e.g., ETH, BTC) or by network and contract address. Use this to build price charts, analyze price trends, calculate historical returns, or display historical price information in your application. Important: Provide either symbol OR both network and address (not both methods simultaneously). Time range is specified with start_time and end_time (Unix timestamps or ISO 8601 strings). The interval parameter controls data point granularity (5m, 1h, or 1d).
Tool to get metadata for an NFT collection using its marketplace slug (OpenSea, LooksRare, etc). Use when you need collection-level information such as name, description, social links, and floor price. This is useful for discovering collection details without needing the contract address.
Tool to retrieve NFT contracts associated with one or more wallet addresses across multiple blockchain networks. Use when you need to discover which NFT collections a wallet owns tokens from, across networks like Ethereum, Base, Polygon, Arbitrum, and Optimism. Returns contract details including metadata, spam classification, and OpenSea data.
Tool to get the floor price for an NFT collection across multiple marketplaces (OpenSea, LooksRare, etc). Use when you need to check the current floor price of an NFT collection or compare prices across different marketplaces. Returns floor price data including price, currency, collection URL, and timestamp of when the price was retrieved.
Tool to retrieve comprehensive metadata for a specific NFT, including contract details, media URLs, attributes, ownership info, and OpenSea data. Use when you need detailed information about a particular NFT token, such as its image, traits, description, or contract metadata.
Tool to retrieve metadata for multiple NFTs in a single request (up to 100 NFTs), including contract details, media URLs, attributes, and collection data. Use when you need detailed information about multiple NFT tokens efficiently. More efficient than making individual calls for each NFT.
Retrieves NFT sales that have occurred through on-chain marketplaces using Alchemy's v3 API. Supports Ethereum (Seaport, Wyvern, X2Y2, Blur, LooksRare, Cryptopunks), Polygon (Seaport), and Optimism (Seaport) mainnets. Use this to track NFT sales activity, analyze market trends, monitor specific collections or tokens, and gather comprehensive sales data including prices, fees, and transaction details. Supports flexible filtering by block range, marketplace, contract, token, buyer, seller, and taker role.