List of OnChain Data API projects on Avalanche (2026)

DeFiLlama API gives programmatic access to DeFiLlama data, such as TVL, yields, stablecoins, fees and volumes, through free public endpoints and premium endpoints for paying subscribers. The same data is offered to AI agents through an MCP server.

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.

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.

Substreams enables high-performance data streams for real-time blockchain processing through modular components. The system processes blockchain data in parallel while maintaining composability for custom data pipelines.

Firehose is a blockchain data extraction layer that processes full blockchain histories. It provides a files-based and streaming-first approach to blockchain data, serving as the foundation for Substreams.

Amp is a blockchain-native database that transforms raw onchain data from multiple chains into verifiable, structured datasets with real-time access. The system provides SQL, REST, and GraphQL query interfaces for enterprise analytics, compliance reporting, and AI-driven applications. Amp features SOC 2-aligned architecture with full data lineage, flexible deployment options, and cross-chain unification capabilities.

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.

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

Nodit Platform is a blockchain infrastructure service providing hosted node access, RPC endpoints, and indexed on-chain data across a broad range of networks. It routes requests through a balancing layer of synchronized nodes for shared access, while also offering dedicated, single-tenant node clusters with customized security and uncapped throughput for enterprise clients. The service returns account balances, token and NFT holdings, transfers, transaction history, decoded contract events, and gas estimates through a standardized response structure, alongside webhook and stream delivery for real-time monitoring. It is used by exchanges, wallets, and application developers building across multiple chains.

Datasquare is a hosted interface for exploring indexed blockchain datasets without building query infrastructure. It exposes the same normalized chain data that backs the API layer, letting a user inspect onchain activity directly in the browser. It runs as a separate application from the main console and is aimed at developers and analysts.

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

NFTScan API provides REST endpoints for NFT data, giving developers access to ERC-721 and ERC-1155 asset information, transaction records, collection statistics, and marketplace data across multiple blockchain networks.

CoinStats API is a developer platform providing programmatic access to cryptocurrency market data, wallet balances, transaction history, and DeFi positions across multiple blockchains through a single key and unified schema. It exposes endpoints for pricing, portfolio analytics, and a token security scoring service that evaluates smart contracts for exploit patterns. The platform also runs a server implementing the Model Context Protocol, letting AI agents and language-model applications query the same data through a standardized interface. Developers manage keys, usage, and billing through a dedicated dashboard separate from the consumer portfolio application.

Chainbase Crypto Data Platform provides APIs, datasets, and data syncing for indexing and transforming large-scale on-chain data across multiple blockchains.

Chainbase Network is a decentralized omnichain data network that makes crypto data programmable and composable across blockchains.

SonarX Real-Time is a blockchain data service providing indexed on-chain data seconds from the chain tip across multiple chains. The product offers instant indexing and delivers data through data warehouses for SQL querying without storage costs. It supports trading, fraud detection, network monitoring, risk assessment, and analytics.

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.

Ormi provides unified Web3 data infrastructure through multiple access methods including real-time subgraphs, SQL-based analytics, and REST APIs. The platform delivers low-latency blockchain indexing across multiple chains, supporting live data streaming and historical analytics.

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.

Bebop API is a suite of trading APIs that gives applications access to Bebop's on-chain trade execution and market data. The RFQ API returns firm quotes from professional market makers with a guaranteed price and fill, while the Aggregation API routes orders through competing solvers for broader token coverage. Both return a ready-to-sign transaction that settles atomically through smart contracts, without Bebop taking custody of funds. The Price API streams indicative market maker prices over WebSocket, and the Trade History API returns past trades by wallet, transaction or partner. Wallets, aggregators, solvers, cross-chain apps and liquidators integrate it to source liquidity for their users.