Base RPC Endpoints: Public vs Private - What Is the Difference?

14 October 2026

An RPC (Remote Procedure Call) endpoint is the URL your wallet or dapp uses to talk to the Base network. The difference between a public and a private endpoint comes down to who runs it, who can use it, and what limits apply. Public endpoints are free, shared, and open to anyone; private endpoints are dedicated to a single user or project, usually for a fee. That is the short answer. The longer answer involves rate limits, privacy, reliability, and what happens when the free service goes down.

Public RPC Endpoints

Public endpoints are the default option for most people new to Base. They are operated by the Base team itself or by third-party infrastructure providers like Ankr, QuickNode (their free tier), or LlamaNodes. You will often see the main Base RPC URL listed on the official Base docs page:

https://mainnet.base.org

Anyone can paste that into MetaMask, Rabby, or a custom dapp. No account, no API key, no payment. That convenience is the main selling point.

But "free" has a cost. Public endpoints are shared by thousands of users at once. To keep the network from being overwhelmed, operators impose rate limits. A typical public endpoint might allow, say, 10 to 50 requests per second per IP address. If you are running a bot, a batch script, or a user with many open tabs, you run into that ceiling quickly. The result: transactions that hang, dapps that fail to load balances, or error messages that make no sense.

There is also a privacy consideration. When you use a public endpoint, the operator can see your IP address and the wallet addresses you are querying. They cannot see your private keys or steal funds, but they can build a profile of your activity. For casual use, that is usually fine. For large holdings or privacy-sensitive work, it is a reason to think twice.

Reliability is the third issue. Public endpoints occasionally throttle or shut down during network congestion or a DDoS attack. The Base team has generally kept mainnet.base.org stable, but third-party public endpoints have a spotty track record. If the endpoint you are using goes down, your wallet stops working until it comes back.

Private RPC Endpoints

A private endpoint is a dedicated URL that only you (or your project) can use. You get it by signing up with an infrastructure provider - Alchemy, Infura, QuickNode, or similar - and generating an API key. The URL typically looks something like:

https://base-mainnet.g.alchemy.com/v2/YOUR_API_KEY

That key is embedded in the URL, so do not share it. Anyone with the key can use your endpoint and burn through your quota.

The main advantage is headroom. Private endpoints come with higher rate limits - often 10 to 100 times the free tier. If you are running a validator, a trading bot, or a dapp with real users, that headroom is the difference between smooth operation and constant errors. You also get priority during congestion; your requests are queued ahead of free-tier users.

Privacy improves too. The provider still sees your traffic, but it is tied to your account, not a shared pool. On a paid plan, you are usually covered by a service-level agreement (SLA) that guarantees a certain uptime. If the endpoint goes down, you have a contractual claim - and often a support team to contact. Public endpoints have no such promises.

The cost is the obvious drawback. Providers charge per month based on usage tiers, often scaling with requests per second and historical data queries. For a hobbyist with a few transactions a month, that is wasted money. For a project with real traffic, it is a line item in the operating budget.

Which should you use?

For most people reading this page, the honest answer is: start with public, switch when it hurts. If you are just checking balances, making the occasional swap, or reading Farcaster posts, the public endpoint will work fine. If you start seeing "request failed" errors, your transactions stop broadcasting, or you are building something that makes automated calls, then pay for a private endpoint.

There is also a middle path. Some providers offer a free tier that is effectively a private endpoint with low rate limits. That can be a good compromise for a small project. Just remember that "free tier" often means "no support" and "we can cut you off without notice."

A practical tip: you can add multiple RPC endpoints to your wallet. If one fails, the wallet tries the next. That way, you can keep the public endpoint as a backup while using a private one as your primary.

How to Find the Current Endpoints

The Base network changes slowly, but documentation changes faster. Do not rely on a third-party blog post (including this one) for the current RPC URLs. Go to the official Base docs at docs.base.org and look for the "Network Information" section. They list mainnet and testnet endpoints, chain IDs, and block explorer URLs. For private endpoints, check the current pricing pages on Alchemy, Infura, or QuickNode - they update their limits and prices regularly.

One more thing: be careful about clicking RPC endpoint links from random websites or social media posts. A malicious RPC URL can route your transactions through a fake node that steals your data or returns false information. Always cross-check any RPC URL against the official docs or a trusted source like ChainList before adding it to your wallet.

Bottom Line

Public RPC endpoints are free, open, and good enough for casual use. Private endpoints cost money but give you headroom, privacy, and reliability. There is no single right answer - it depends on what you are doing and how much downtime you can tolerate. If you are just getting started, use the public one. When you hit its limits, you will know it, and that is the moment to open your wallet.

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