List of OnChain Data API companies in Web3 (2026)

Clio is an API server optimized for validated XRP Ledger data access through WebSocket and HTTP interfaces. The system stores ledger data in space-efficient format using Cassandra, enabling horizontal scaling and reduced load on core rippled servers.

DeFiLlama API provides programmatic access to DeFi analytics data including TVL, yields, and protocol metrics. The system offers JSON endpoints for developers building applications.

Turbo Pipelines is a real-time blockchain data streaming service that ingests raw on-chain data from 150+ chains including Solana and routes it through configurable SQL, TypeScript, and HTTP transforms to destinations such as PostgreSQL, ClickHouse, Kafka, and webhooks. Built on a Rust engine with vectorized execution, it provides sub-second latency, instant deployment, live data previews, dynamic address filtering, and unlimited historical replay.

API Suite is a unified API platform that provides access to multiple blockchain networks through standardized REST endpoints. It enables developers to query wallet balances, retrieve block-level data, monitor real-time blockchain activity, create and broadcast transactions, conduct balance audits, access pricing history, track validator rewards, and calculate transaction fees across supported protocols.

Provides real-time blockchain data access.

Subgraphs are open APIs that define how blockchain data is indexed and queried using GraphQL. They allow developers to create custom data schemas for smart contract events and make blockchain data easily accessible to applications.

HyperSync is a blockchain data streaming API for fast historical retrieval and backfilling. It provides efficient access to logs and blocks and integrates with SDKs for multiple languages.

Amberdata Enterprise Data is a normalized digital asset data infrastructure delivered via REST APIs, WebSocket feeds, and cloud integrations including Snowflake, Databricks, and AWS S3. The platform aggregates market data from centralized exchanges, DeFi protocol metrics, wallet and on-chain activity, IOSCO-compliant reference rates, and post-trade tools for risk management, regulatory compliance, and liquidity analytics.

Staking Data API provides near real-time blockchain data aggregation across proof-of-stake networks through unified query interfaces. The service indexes historical staking metrics, validator performance statistics, reward distributions, and network parameters. API architecture delivers SOC 2-certified data reliability with industry-leading service level agreements for production environments.

QuickNode Streams is a service that pushes blockchain data directly to users as it becomes available. It eliminates the need for users to handle errors, retries, rate limits, and bottlenecks

Dwellir Hyperliquid Data API provides real-time and historical market data for the Hyperliquid exchange via edge servers in Singapore and Tokyo. The service delivers L2 orderbook depth up to 100 price levels, L4 individual order visibility including user addresses, gRPC streaming for block and fill event data, and OHLCV candlestick data accessible through REST, WebSocket, and JSON-RPC endpoints.

thirdweb Insight provides blockchain data queries and analytics through APIs that enable developers to access onchain information and power AI agents with blockchain data.

Implements decentralized data indexing through GraphQL APIs, enabling efficient blockchain data queries. The system provides hosted subgraph services with enhanced performance and reliability.

gRPC Data Streaming is an onchain data API that provides structured, real-time Solana blockchain data through the Yellowstone Geyser plugin for applications requiring low-latency, event-driven data consumption.

NFTScan as a Service delivers infrastructure development services for blockchain developers, providing professional NFTScan infrastructure including explorers and NFT data services.

Codex API provides GraphQL access to blockchain data across multiple networks, indexing transactions, token metadata, and exchange activity for millions of tokens. The system offers real-time and historical data through free and paid tiers for integration into applications.

Gateway Indexer is a blockchain data service that provides access to on-chain information for EVM events, supporting up to 100,000 requests per second with custom middleware for DeFi calculations.

Guardarian API enables businesses to integrate fiat-to-crypto exchange functionality into their applications through RESTful endpoints. The system provides real-time exchange rates, transaction creation, and status tracking with robust documentation for developer integration.

API service that provides systematic access to Kaito's proprietary datasets, enabling integration of data feeds and metrics for investment, research, and analysis.

CDP Onchain Data API provides enterprise-grade developer tools for reading and interacting with blockchain data, including real-time balance queries, transaction history, and smart contract events.

Blockscout APIs provide REST and JSON-RPC endpoints for programmatic blockchain data access including transaction queries, address monitoring, token information retrieval, smart contract interaction, and historical data analysis. The API infrastructure supports rate-limited public access and unlimited enterprise tiers with comprehensive documentation for integration into external applications and services.

Etherscan API V2 provides indexed on-chain data across multiple EVM-compatible networks through unified REST endpoints accessible via a single API key and chain ID parameter. The service exposes account balances, transaction history, smart contract ABIs and source code, token transfer events, gas oracle data, event logs, and address name tags. Tiered subscription plans offer varying rate limits and access to Pro endpoints covering address metadata, token holder analytics, and cross-chain portfolio data.

OpenSea Stream API enables real-time access to marketplace events through WebSocket connections, allowing applications to receive instant updates on listings, sales, and transfers.

A decentralized omnichain data network featuring a dual-chain architecture that bridges programmability and composability of crypto data with high throughput, low latency, and enhanced security.

Quppy API enables businesses to integrate multi-currency wallet generation, virtual IBAN creation, and cryptocurrency exchange functionality with built-in KYC/AML compliance services.

A suite of developer APIs for accessing Bitcoin blockchain data and market information. Includes REST JSON endpoints for querying blocks, transactions, addresses, and balances (Blockchain Data API); a plaintext interface for real-time Bitcoin network metrics such as hashrate, difficulty, and block height (Simple Query API); a WebSocket channel at wss://ws.blockchain.info/inv for real-time transaction and block notifications; BTC/fiat exchange rate data across multiple currencies (Exchange Rates API); and historical chart and statistics data for network-level metrics (Charts & Statistics API).

Real-time pricing data for blockchain assets and decentralized finance (DeFi) applications.

Token Terminal API enables developers to access standardized blockchain data programmatically through REST endpoints, supporting integration into applications and analysis workflows.

Console provides developers with API access to multi-chain blockchain data through authentication keys and subscription management. The platform enables real-time data queries across supported networks.

API platform enabling financial services to offer crypto trading to end users through RFQ and CLOB models, supporting market data access, liquidity sourcing, and settlement.

SonarX Real-Time is a blockchain data service providing indexed on-chain data with seconds from tip latency across multiplechains. The product offers instant indexing and delivers data through warehouses for SQL querying without storage costs. Used for trading models, fraud detection, network monitoring, risk assessment, and DApp analytics.

Nimbus On-Chain Data API is a REST API delivering real-time indexed blockchain data across multiple networks, including token holdings, NFTs, DeFi positions, and price data. It bundles a DEFI Actions module that prepares and returns transaction payloads for third-party protocols and a Kafka-based Sui price feed for streaming updates. Access is managed through an API Portal with Free, Premium, and Enterprise tiers, with some endpoints requiring an API key.

Full block streaming service for blockchain data, supporting multiple chains and integration with indexer stacks.

SQD Network operates as a decentralized query engine optimized for batch extraction of large volumes of blockchain data from multiple networks. The system provides multiple access methods including Squid SDK for self-hosted development, SQD Cloud for hosted services, SQD Firehose for subgraph compatibility, and framework integrations. Users can extract, transform, and serve blockchain data at up to 100x faster speeds compared to traditional RPC methods.

Translate API processes blockchain transactions and provides standardized, human-readable data, including transaction type, description, and detailed asset transfers with comprehensive metadata.

Aperture API is an infrastructure providing developers and institutions with programmatic access to Aperture's intent-based DeFi services, liquidity management tools, and solver network functionality.

Soroban Indexer implements GraphQL access to Stellar smart contract data through indexed ledger state and transaction history. The system provides structured query interfaces for Soroban contract interactions and token operations on Stellar networks.

Zapper API offers developers GraphQL access to comprehensive blockchain data including portfolio balances, token prices, NFT metadata, and transaction histories across 50+ blockchain networks with enterprise-grade infrastructure.

Moralis APIs provide structured access to blockchain data including NFT metadata, token prices, wallet balances, transaction history, and real-time event streaming across multiple EVM chains and Solana through REST endpoints and webhooks.

API for integrating RugCheck's Solana token security analysis into third-party applications and services.

TRES Financial Data Lake provides enterprise-grade data infrastructure that aggregates and normalizes financial data points from 200+ Web3 networks, exchanges, and custodians, enabling developers to power their digital asset products with curated, contextual blockchain data.

A comprehensive set of APIs for blockchain data access, including DEX trades, token transfers, NFT analytics, and cross-chain data through a unified GraphQL interface.

Network Data Pro provides aggregate network data metrics for cryptoassets through API endpoints and visualization tools. The system delivers on-chain metrics including active addresses, transaction counts, mining data, and economic indicators for fundamental analysis. Includes Community Data Downloads for free researcher access and Pro Charts visualization tools for interactive analysis.

0xAPI is a multi-chain data API providing structured real-time and historical blockchain data through REST endpoints for tokens, NFTs, transactions, blocks, wallets, and events.

Ormi provides unified Web3 data infrastructure through multiple access methods including real-time subgraphs via GraphQL, SQL-based analytics, and REST APIs. The platform delivers sub-30ms latency blockchain indexing with 99.9% uptime across multiple chains, supporting live data streaming and historical analytics.

Artemis API implements RESTful endpoints for programmatic access to blockchain metrics. The system facilitates custom integrations with crypto data while maintaining standardized responses for cross-chain data points.

Octav API is an on-chain data API that delivers multi-chain portfolio, wallet, and transaction data to developers and institutional integrators. It provides REST endpoints for portfolio balances, NAV, historical snapshots, token overviews, and transaction history across multiple blockchains, with a credit-based pricing model and a rate limit of 360 requests per minute per API key.

Krystal Cloud is an on-chain data API that indexes liquidity pool and LP position data across multiple EVM chains and DEXs. REST endpoints deliver pool metrics, APR statistics, incentive data, and position details with real-time updates. The service uses a credit-based pricing model with tiered plans, and provides CLI tooling and an embeddable UI component for developer integration.

Aura Network solves data delays in Solana apps by running a decentralized indexing system. It distributes asset data across nodes, supporting fast queries and consistent state tracking. Developers can fetch NFT details instantly, users can validate assets reliably, and apps can scale without bottlenecks. Its multi-node architecture ensures high availability and precision for blockchain data.