List of OnChain Data API companies in Web3 (2026)

Helius APIs is a suite of REST APIs for Solana developers. It includes the Digital Asset Standard (DAS) API for token and NFT metadata, Enhanced Transactions API for human-readable transaction parsing, Priority Fee API for fee estimation, ZK Compression endpoints, and the Wallet API for aggregated wallet data including balances, history, transfers, and identity lookups.

InfStones Fast API is a direct validator connectivity with optimized routing infrastructure, providing lightning-fast blockchain data access across 80+ protocols. The system delivers real-time transaction processing while maintaining enterprise-grade security and authentication.

LunarCrush API delivers social media analytics and market data through RESTful endpoints, enabling developers to integrate social intelligence into trading models, bots, and applications.

TradePort NFT Data API provides developers with GraphQL access to NFT metadata, ownership records, trading history, and marketplace listings across multiple blockchains. The API delivers real-time data synchronization, standardized data formats, and comprehensive NFT information including rarity, floor prices, collection statistics, and transaction events. Developers can query historical and current NFT states, including staking status and marketplace listings, through a unified multichain interface.

DappLooker AI is an agent-native data API layer delivering real-time on-chain and market intelligence to autonomous AI agents and trading systems. The service provides unified REST endpoints for token metrics, technical indicators, smart money flows, whale activity, rug detection, social sentiment, and staking data across multiple blockchain networks. Endpoints support both API key and x402 on-chain payment authentication, with MCP and NLP-driven interfaces for LLM-powered agent integration.

DeBank Cloud offers real-time on-chain data APIs for querying wallet portfolios, token balances, DeFi protocol positions, and transaction pre-execution results across EVM chains, using a compute unit pricing model. The platform bundles an OpenAPI for indexed blockchain data access, DeBank Connect for OAuth 2.0 DApp authentication via DeBank wallets, and an Official Account service enabling Web3 projects to create branded pages and deploy on-chain quests.

CoinMarketCap API provides programmatic access to cryptocurrency pricing data, volume metrics, and market capitalization through RESTful endpoints. The system processes billions of monthly API calls while maintaining low latency and high reliability for enterprise and individual developers.

Xerberus Public API is a REST API providing programmatic access to risk scores, wallet screening, and registry data for DeFi assets and protocols. Endpoints cover unified asset risk scores across Cardano, Ethereum, and Polygon, suspicious wallet flagging, known scam wallet identification via the SIREN service, and vault-level dendrogram reports. Access is authenticated through API keys issued on request.

Immutable Indexer is an API service providing indexed on-chain data from Immutable Chain via REST endpoints and webhooks. Enables developers to query asset ownership, transaction history, marketplace activity, and account balances without operating dedicated blockchain infrastructure. Supports real-time event subscriptions through webhooks for applications that require live on-chain updates.

Glassnode Data is an on-chain data API that delivers blockchain metrics and market data through a unified REST interface with hundreds of endpoints. The API covers on-chain fundamentals, investor behavior, derivatives, and ETF flows, and supports direct delivery via Snowflake, BigQuery, and an Excel add-in. Users access point-in-time data for backtesting and quantitative research with entity-adjusted metrics.

Bebop API is a suite of REST APIs providing on-chain trade execution, price discovery, and trade data for application integration. The RFQ API connects to private market maker inventory and returns firm quotes with guaranteed price and fill for single and multi-token trades. The Aggregation API routes orders through competing solvers across decentralized liquidity sources for broader token coverage with configurable slippage tolerance. The Price API streams real-time prices from market participants via WebSocket. The Trade History API provides indexed trade records queryable by chain, token, and transaction type. Execution APIs settle on-chain through audited smart contracts using EIP-712 signed orders, with gasless submission available as the default mode.

GoldRush is a REST and WebSocket API suite providing indexed blockchain data across multiple networks. Endpoints cover token balances, transaction histories, decoded event logs, OHLCV price data, and real-time DEX pair streams. A command-line interface enables terminal-based querying without writing code, and an Agent Skills package delivers structured endpoint context to AI agents via the Model Context Protocol. The API is accessed via a single API key and a unified data schema across all supported chains.

Blockchain Analytics offers indexed blockchain data made available through BigQuery for easy analysis through SQL.

Footprint Analytics Data API provides unified RESTful endpoints delivering structured blockchain data across NFT, GameFi, and DeFi domains. The system aggregates raw blockchain transactions into queryable datasets supporting both statistical metrics and granular transaction data.

Wingbits Historical Data API provides archived ADS-B flight tracking records in CSV, Parquet, and JSON formats. The system enables analysis of past air traffic patterns, route optimization research, and airspace integration planning. Users access time-based directory structures with hourly data segments for regional or global coverage analysis.

Buda API delivers REST and WebSocket interfaces for programmatic trading and market data access, enabling order management and real-time price feeds. The system supports authentication via HMAC signatures while providing public and private endpoint access.

Sandwiched.me is an onchain data platform tracking MEV activity on Solana, covering sandwich attacks and atomic arbitrage. Features include deep-linked transaction views with token flow visualization, real-time attack and arb streams, extracted value and fee breakdowns including Jito and NextBlock tips, time-based volume filtering, app source analysis of targeted protocols, arb and sandwich volume over time, top bot and arb leaderboards, liquidity pool treemap monitoring, per-validator sandwich analysis, and API access.

Figment's Staking API abstracts network-specific operations, enabling developers to add staking functionality for various digital assets quickly and consistently.

Nite Protocol is a decentralized on-chain database and open API that standardizes vacation-rental listing data, enabling trustless distribution and access for builders.

Cido Quantum-Optimized Data Indexing implements blockchain data indexing through quantum annealing combined with classical pipelines, enabling real-time data access and complex optimization. The system processes on-chain and off-chain data across EVM-compatible networks through GraphQL APIs while reducing computational overhead via QUBO-based quantum processing for data partitioning, graph optimization, and algorithmic trading workflows.

SimpleHash API lets you access NFT and token data across multiple blockchains through REST APIs, webhooks, and streaming services.

Gravity enables real-time data collection and dataset delivery through Subnet 13, providing businesses with fresh, relevant data for analysis and decision-making.

Flipside API provides access to blockchain data, allowing users to execute SQL queries and retrieve data in JSON and CSV formats. It offers query result caching and detailed metadata for developers and analysts. The API supports R, Python, and JS SDKs.

AMB Query implements standardized blockchain data access through developer-friendly APIs, providing real-time and historical data from Bitcoin and Ethereum networks. The system abstracts complex blockchain data parsing and indexing infrastructure through unified query interfaces.

An API that provides programmatic access to Arbitrage Scanner data and services for developers, enabling integration of arbitrage metrics and on-chain wallet analytics into external systems.

Voyager API is an onchain data API providing indexed Starknet blockchain data including blocks, transactions, contracts, tokens, NFTs, and staking records. Developers access pre-aggregated data without operating their own indexer or node, with endpoints covering the full range of data surfaced on the Voyager block explorer. Rate limits and custom endpoints are available on negotiated plans.

Enterprise-grade blockchain data analysis tool that queries on-chain data to help organizations compare internal crypto data with external blockchain data, reducing errors and inconsistencies.

DYOR TON API is an on-chain data API for TON that provides extended token information, DEX pool data, historical prices, swap history, price charts, trust scores, and related analytics.

Amp is a blockchain data platform that indexes smart contract events in real time, reconciles chain reorganizations, and exposes results as structured SQL tables via SQL, REST, and GraphQL interfaces. The system preserves cryptographic provenance for every dataset, providing audit-grade lineage from transaction origin to settlement. Deployable on-premises, in hybrid, or cloud environments, it serves regulated banks, stablecoin issuers, and enterprise teams managing compliance obligations including GENIUS Act requirements, AML monitoring, and SAR filing procedures.

Azura's DeFi trading platform provides users with access to decentralized finance assets and real-time market data, allowing for efficient trade management across multiple blockchain protocols.

RESTful API service providing access to CryptoRank's cryptocurrency market data, including prices, trading volumes, and market metrics.

Cielo API provides developers with programmatic access to blockchain data streams and wallet analytics through RESTful endpoints. The API offers real-time onchain data, wallet tracking capabilities, token balance queries, PnL calculations, and related wallet discovery features. Developers can integrate these data services into their own applications and platforms.

NearBlocks API provides indexed NEAR Protocol blockchain data through REST endpoints for application development. Developers access transaction history, account balances, token data, and smart contract events via tiered subscription plans including free, standard, and enterprise tiers with SLA support.

PikesPeak provides indexed NEAR Protocol blockchain data through a browser-based explorer and REST API, enabling wallet portfolio tracking, transaction and block visualization, and DeFi market analytics. The platform indexes on-chain events for accounts, validators, contracts, DAOs, and bridges, delivering structured data through multiple endpoints with tiered access for developers, researchers, and token holders.

The Vybe API is designed for developers and teams to access specialized endpoints for DeFi, AI, Trading, and more. You can integrate and build projects with exceptional speed and efficiency, leveraging Solana's capabilities to the fullest for your projects.

A data infrastructure platform providing blockchain data access through prebuilt APIs and customizable solutions.

Pine Analytics Dashboard provides blockchain data visualization and metrics tracking for Web3 protocols, enabling users to monitor network activity through customized views.

Taostats implements RESTful API architecture providing programmatic access to Bittensor blockchain data, supporting real-time queries and historical analytics. The system enables developer integration through standardized endpoints and authentication protocols.

Top Ledger Analytics Platform is an SQL-based analytics platform that decodes Solana blockchain data into queryable tables, enabling dashboard creation, wallet analysis, and competitive insights through Trino SQL queries and visualization tools.

Crypto-as-a-Service provides API infrastructure for businesses to integrate cryptocurrency functionality into their platforms. The system enables KYC verification, wallet services, and transaction processing for enterprise clients through white-label solutions.

TON API is a hosted on-chain data service for the TON blockchain. It provides REST, streaming, and webhooks endpoints to read accounts, jettons, NFTs, events, and transactions, with extras like emulation, gasless flows, and SDKs so developers can build and run dApps on TON.

A specialized data analytics platform built on ClickHouse technology for analyzing blockchain and cryptocurrency data at scale.

Starkscan API delivers programmatic access to Starknet blockchain data through REST endpoints. Developers can query information about blocks, transactions, contracts, and events with pagination support. The API includes specialized endpoints for NFT data and advanced analytics in the PRO tier.

Enterprise-grade data pipelines for curated ETL processes, enabling integration of real-time and historical on-chain data for analytics and insights without managing multiple IDLs or maintaining full ledger copies.

Resolution Service API provides blockchain domain name resolution through HTTP endpoints, enabling developers to resolve domain metadata and records from UNS, CNS, and ENS naming services. The system caches blockchain events for rapid domain data retrieval without direct blockchain interaction.

Neynar API provides REST endpoints for accessing Farcaster protocol data, enabling developers to read user profiles, casts, feeds, and social graph information through standardized interfaces.

Developer platform to build, run and query custom Solana indexers with real-time data streaming and instant APIs.

Peer-to-peer indexing layer and API that lets developers query Solana data in real time.

Safari Web3 Analytic Platform provides marketing attribution tools, enabling projects to track key metrics like customer acquisition cost (CAC), ROI, and customer lifetime value (LTV) using both on-chain and off-chain data.

DigNow Data Platform provides unified API access to verified crypto data through AI-powered aggregation and multi-source integration. The system includes specialized AI agents for market intelligence, project health monitoring, and regulatory compliance analysis, processing data from multiple sources with standardized formatting.