Base-Sepolia RPC Nodes and APIs

OnFinality provides production-grade Base-Sepolia infrastructure for developers, enterprises, and Web3 teams. Access fast RPC endpoints, managed nodes, blockchain indexing, and AI agent infrastructure through a platform built for uptime, scale, and production workloads.

Chain ID84532

CurrencyETH

Create RPC Endpoint

Base-Sepolia RPC Endpoint

RPC API Features

Indexing

Index and query Base-Sepolia blockchain data for analytics, dashboards, explorers, and real-time apps.

AI Agent

Power chain-aware AI agents with trusted Base-Sepolia data, docs, and live infrastructure context.

N.Virginia

About:

Connect to Base-Sepolia in seconds with OnFinality RPC endpoints, request analytics, scalable rate limits, and 99.99% uptime for production Web3 apps.

OnFinality Base-Sepolia RPC features

OnFinality provides authenticated HTTP endpoints for Base-Sepolia, designed for team projects and higher-volume workloads. Key features include:

Archive access: Query historical state for debugging and analytics
Request analytics: Monitor usage, errors, and limits through the OnFinality dashboard
Scalable infrastructure: Upgrade from shared endpoints to dedicated nodes as your needs grow
Global availability: Endpoints hosted in N. Virginia with low-latency access

Resources

Additional Info

Base-Sepolia Public RPC Endpoint

Connect to OnFinality's Base-Sepolia public RPC endpoint for fast and reliable blockchain access. Built for developers who need stable performance across testing, deployment, and live application usage.

The below example uses the public API endpoint*. This endpoint is only suitable for testing. To avoid rate limiting and service interruption, sign up now to get your own API key.

Example CURL

curl -H 'content-type:application/json' -d '{"id": 1, "jsonrpc": "2.0", "method": "eth_blockNumber"}' 'https://base-sepolia.api.onfinality.io/public'

curl -H 'content-type:application/json' -d '{"id": 1, "jsonrpc": "2.0", "method": "eth_blockNumber"}' 'https://base-sepolia.api.onfinality.io/public'

HTTPs

https://base-sepolia.api.onfinality.io/public

https://base-sepolia.api.onfinality.io/public

* The public endpoint is rate limited

Request statistics

Public rate limit5 req/secPublic endpoint

PRICING

Calculate Your Costs

Only pay for what you need.

Monthly Response Units

Million Standard Requests

0100M200M300M400M

Total Cost

$49/ month

Recommended Plan: GROWTH

Continue with this plan

Why Choose OnFinality for Base-Sepolia Infrastructure?

Reliable blockchain infrastructure matters when your product depends on speed, uptime, and accurate onchain data.

High Performance Access

Support demanding Base-Sepolia workloads with infrastructure designed for reliable throughput and stable performance.

Powerful RPC Analytics

Monitor RPC usage and performance with analytics that help teams manage and scale blockchain infrastructure more effectively.

99.99% Uptime

Run production applications on Base-Sepolia with dependable infrastructure built for availability and consistency.

Connect via HTTPS or WebSocket

Use flexible connection options for applications that need both standard requests and real-time blockchain updates.

Decentralized Servers Hosted Globally

Access globally distributed infrastructure that improves resilience, reliability, and service reach.

Full Archive Access at No Extra Cost

Access historical Base-Sepolia blockchain data for deeper querying, analytics, and advanced application needs.

Build faster with Base-Sepolia RPC endpoints

Use OnFinality's Base-Sepolia RPC APIs to connect wallets, dApps, dashboards, bots, and backend services without operating your own node from day one.

Public endpoint testing

Start with the Base-Sepolia public RPC endpoint for lightweight checks, prototypes, and quick integration tests.

Authenticated API access

Move production traffic to authenticated endpoints when you need clearer limits, analytics, and operational visibility.

Standard RPC methods

Query Base-Sepolia blocks, transactions, balances, events, and chain state through familiar HTTP and WebSocket workflows.

Operate Base-Sepolia infrastructure with more control

Production teams need more than an endpoint URL. They need observability, predictable capacity, and a path from shared RPC access to isolated infrastructure.

Request visibility

Track usage patterns and response activity so your team can understand traffic growth before it becomes an incident.

Dedicated node path

Use dedicated Base-Sepolia nodes when your workload needs isolated resources, custom operations, or stronger capacity planning.

Archive and historical data

Plan for archive access when analytics, audits, indexers, or advanced app features need older Base-Sepolia state.

Choose the right Base-Sepolia RPC setup

Different Base-Sepolia products need different infrastructure. OnFinality gives teams a practical path from public RPC testing to production-grade API and node operations.