Token Metadata APIs: Identity, Decimals and Search
Build token lookup and search around stable asset identities while treating names, symbols and images as descriptive metadata.
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Tokens & markets
Understand asset metadata, market observations and the calculation behind a price or ranking.
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Token Holder Analytics: Supply, Concentration and Wallet Counts
Explain who appears in a holder snapshot, how supply denominators change concentration metrics and why addresses are not people.
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NFT Data APIs: Ownership, Metadata and Transfer History
Represent collections, individual assets, balances, transfers and off-chain descriptions as distinct parts of an NFT application.
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NFT Market Data: Floor Prices, Sales and Rarity Metrics
Understand the different observations behind a collection floor, a completed sale, a rarity ranking and a portfolio valuation.
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Historical Crypto Prices: Quotes, Timestamps and Valuation
Keep the observation behind a historical price separate from the holdings or activity being valued.
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DEX Trade Data and OHLCV: Swaps, Pools and Candles
Turn swap observations into scoped market data while retaining the differences between trades, liquidity and chart aggregates.
Read the guideTokenized Asset Data: Connecting On-Chain Records with Off-Chain Context
Retain the evidence linking a token observation to an external asset description without treating the token alone as proof of every associated claim.
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Prediction Market Data: Outcomes, Prices and Resolution Records
Keep market definitions, outcome assets, trading observations and resolution evidence distinguishable in an analytical dataset.
Read the guideERC-20 vs ERC-721 vs ERC-1155 Data Models
Compare fungible, unique and multi-token asset records, including balance keys, token IDs and the events a data integration must preserve.
Read the guideDecoding ERC-1155 Batch Transfers Without Double Counting
Expand ERC-1155 batch events into ID-and-value movements, preserve array pairing and event identity, and test malformed or repeated deliveries.
Read the guideRefreshing NFT Metadata Without Rewriting History
Cache and refresh NFT metadata while preserving observation times, content references and the distinction between mutable descriptions and token ownership.
Read the guideNFT Floor Price: What the Lowest Listing Misses
Interpret NFT floor prices with marketplace scope, listing validity and asset comparability, without treating one listing as a guaranteed sale value.
Read the guideThe editorial approach
Useful questions.
Traceable explanations.
Each guide starts with a concrete developer question and separates technical observations from the interpretation an application adds. Worked examples use illustrative values; references point to standards and technical documentation.
Published by Indexbase. Explore related guides as your requirements develop, from a first data question to a more deliberate integration workflow.