List of OnChain Data API companies in Web3 (2026)

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.

Namadexer is a blockchain indexer and JSON API server for the Namada network. It extracts blocks and transactions from a Namada node, persists them in a PostgreSQL database, and exposes query endpoints for retrieving specific on-chain data. The service targets developers building applications requiring indexed access to Namada network activity.

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.

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.

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 is an onchain data API platform that provides real-time indexed blockchain data on wallet portfolios, token balances, DeFi protocol positions, and transaction pre-execution results across multiple blockchains, priced on a compute unit model. It bundles an OpenAPI for querying chain, protocol, pool, token, user, and wallet data, DeBank Connect for authenticating decentralized applications through DeBank wallet accounts, and an Official Account service that lets Web3 projects build branded pages, broadcast updates, and communicate with users identified by their wallet addresses. The service is used by developers and Web3 teams needing indexed on-chain data or user engagement tools without building their own indexing infrastructure.

OnChainRisk is a blockchain forensics and wallet risk scoring platform for investigators, compliance teams, and developers. It provides a dashboard and a REST API that analyze wallet activity, screen addresses for anti-money-laundering and sanctions risk, and trace stolen funds across multiple blockchain networks. The platform also evaluates token contracts for honeypot behavior and other security risks, inspects deployed smart contracts for verification status and proxy patterns, and detects block-level activity such as sandwich attacks and arbitrage. Users can generate exportable reports and query an AI assistant that summarizes fund flows and flags suspicious patterns in plain language.

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.

Glassnode Data is an on-chain data API that delivers blockchain metrics and market data through a unified interface with hundreds of endpoints. The API covers on-chain fundamentals, investor behavior, derivatives, and ETF flows, and supports delivery through a command-line tool, a data warehouse sharing integration, an Excel add-in, and a Model Context Protocol server for AI agents. Users access point-in-time data for backtesting and quantitative research with entity-adjusted metrics across a wide range of supported blockchains and assets.

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. Developers query structured endpoints to integrate TON market and on-chain data into their own applications. It serves builders and analysts working within the TON ecosystem.

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.

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.

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.

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

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.

Crypto API is a developer-facing programmatic interface that exposes Arbitrage Scanner's exchange and blockchain data for external integration. It provides access to token prices across many centralized and decentralized exchanges, arbitrage spreads for spot and futures strategies, funding rates, and on-chain wallet analysis data including balances, transaction history, and filtered wallet search. Developers, trading bot builders, and companies use it to build their own analytical services or automate arbitrage strategies without using the consumer web interface.

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.

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.

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.

CryptoRank API is a RESTful data API providing programmatic access to CryptoRank's cryptocurrency market data for business and partner integrations. It delivers structured endpoints covering real-time and historical prices, funding rounds, funds, token unlocks, and other market metrics, authenticated through an API key passed in a request header. Developers use it to embed market data directly into their own applications, with tiered daily and monthly usage plans and a machine-readable interface enabling AI assistants and agents to query the data.

NearBlocks API is an onchain data API that provides indexed NEAR Protocol blockchain data through REST endpoints for application development. Developers query transaction history, account balances, token data, and smart contract events, accessing the service through tiered subscription plans ranging from a free personal tier to commercial and enterprise plans with higher rate limits and service-level support. A separate dashboard handles account management, plan upgrades, and API key configuration.

PikesPeak is a blockchain data platform providing indexed NEAR Protocol data through a browser-based explorer and a REST API. It indexes on-chain events across accounts, validators, contracts, DAOs, and bridges, allowing users to track wallet portfolios, visualize transactions and blocks, and analyze DeFi market activity. Developers, researchers, and token holders access the data through tiered plans with varying rate limits and endpoint access.

The Vybe Solana Data API is a developer-facing onchain data API providing indexed access to Solana wallet, token, and market data. It exposes REST and WebSocket endpoints covering wallet balances and DeFi positions, token analytics, labeled entities, and historical trade and price data filtered through vetted liquidity criteria to reduce manipulated pricing signals. The API also supports direct swap execution by routing calls to decentralized exchange programs on Solana, and includes a machine-readable interface for AI agents alongside a pay-per-request payment protocol. It serves developers, trading bot builders, and institutions building analytics dashboards, portfolio trackers, or automated trading systems on Solana.

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.

BlockRazor is a Web3 transaction infrastructure platform for wallets, decentralized exchanges, trading bots, searchers, and quantitative trading systems. It provides transaction submission services including private RPC routing, block building, and gas sponsorship, alongside low-latency real-time data streams covering pending transactions, blocks, node synchronization, and network fee data. The platform routes transactions through private paths to reduce exposure to sandwich and frontrunning attacks while sharing a portion of backrun value with users as rebates, and it delivers early transaction and block signals to support latency-sensitive trading strategies. Users access all services through a unified account and dashboard covering multiple blockchain networks.

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.

Solana Beach API is a public REST API providing structured access to Solana network data. It exposes endpoints for validator lists, stake accounts, staking rewards, block information, transaction previews, and cluster-level metrics such as skip rate and yield breakdowns. Developers and researchers use it to programmatically retrieve indexed on-chain data for building applications or conducting analysis without operating their own infrastructure.

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.