Core API
Quicknode's flagship blockchain RPC API. Production-grade access to 80+ chains and 130+ networks from globally distributed edge endpoints with sub-50ms latency, archival data, WebSockets, and a 99.99% uptime SLA.
Overview
Core API is Quicknode's flagship blockchain RPC product, giving developers fast, reliable, and highly available access to 80+ blockchains and 130+ networks (mainnets and testnets) through a single, consistent JSON-RPC, REST, and WebSocket interface. It is the foundation that powers exchanges, wallets, DeFi protocols, indexers, RPC re-providers, and AI agents across Ethereum, Solana, Hyperliquid, Base, BNB Smart Chain, Polygon, Arbitrum, Optimism, Avalanche, TRON, Monad, Sui and many more.
Core API is delivered from Quicknode's globally distributed edge network with POPs across North America, Europe, and APAC, which keeps median RPC latency under 50ms for most clients and avoids the cold-start and rate-limit problems of public endpoints. Every Core API endpoint includes built-in load balancing, automatic failover across redundant nodes, full archival data on supported chains, WebSocket subscriptions, and MEV-protected transaction submission where applicable.
Core API is enterprise-ready out of the box: SOC 2 Type II certified, ISO 27001 certified, with a 99.99% uptime SLA available, signed DPAs and EU data residency options for GDPR-regulated workloads, and dedicated support for production teams. It pairs natively with the rest of the Quicknode platform, including Streams for real-time pipelines, Webhooks for event alerts, IPFS for storage, Clusters for dedicated backends, SQL Explorer for onchain queries, and the Marketplace for one-click add-ons.
Trusted by over 1 million developers and most of the largest names in Web3, Core API offers a free tier with no credit card required so developers can prototype immediately and scale in place to dedicated nodes and enterprise plans without changing endpoint URLs or rewriting code.
The Problem
Running and scaling your own blockchain nodes is expensive, slow, and unreliable. Public RPC endpoints rate-limit aggressively and lack archival data, while building production-grade multi-chain infrastructure in-house requires a dedicated team that most developers don't want or can't afford.
The Solution
Key Features
80+ Chains, 130+ Networks
Ethereum, Solana, Hyperliquid, Base, BNB Smart Chain, Polygon, Arbitrum, Optimism, Avalanche, Monad, Sui, TRON and many more from one dashboard.
Sub-50ms Global Latency
Edge POPs across North America, Europe, and APAC deliver consistently fast RPC responses worldwide.
Archival Data and WebSockets
Full historical state, eth_getLogs, debug_trace, and WebSocket subscriptions on supported chains.
99.99% Uptime SLA
Backed by automatic failover, redundant nodes, and SOC 2 Type II plus ISO 27001 certifications.
Free Tier, No Credit Card
Generous free tier for prototyping, with a seamless upgrade path to paid and dedicated tiers.
Key Strengths
How Developers Use Core API
DeFi & DEX Backends
Power swaps, lending markets, perpetuals, and aggregators with low-latency RPC and MEV-protected sends.
Wallets & Mobile Apps
Serve balance lookups, transaction history, and broadcasts at global scale across every major chain.
Indexers & Analytics Pipelines
Use archival RPC, eth_getLogs, debug_trace, and WebSockets to build real-time and historical onchain data pipelines.
AI Agents & Automation
Give AI agents reliable, low-latency, multi-chain blockchain access without operating their own infrastructure.
Exchanges & Custodians
Production-grade RPC for centralized exchanges, custodians, and treasury platforms with enterprise SLAs and compliance posture.
Works Well With
Ethereum
Polygon PoS
Solana
BNB Smart Chain
Aptos
Arbitrum One
Arbitrum Nova
Avalanche
B3
Base
Berachain
Bitcoin
Blast
Celo
Cosmos
Cyber
Fantom
Flow
Fuel
Gnosis
Immutable zkEVM
Japan Open Chain
Kaia
Mantle
Morph
NEAR
Omni
Optimism
peaq
Polkadot
Polygon zkEVM
Scroll
SEI
Stacks
Starknet
Stellar
Story
TRON
Unichain
Vana
World Chain
Xai
XRP Ledger
zkSync Era
Ship faster than your competition
Free RPC across 76+ chains. Spin up an endpoint in under 30 seconds.
Compare
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Start Building Now
Reliable RPC, powerful APIs, and zero hassle.
Resources
Quicknode provides comprehensive documentation, SDKs, sample apps, guides, and a Builder's Guide so developers can start using Core API in minutes, from quickstart endpoints and per-chain method references to production-grade architecture patterns.