The Only Private Blockchain Gateway

Despite millions of users worldwide, today’s wallets often leak user IP addresses and all sorts of metadata.

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RPCh blue Shield, Wallet Privacy powered by HOPR

I Thought web3 Was Private? Not a Chance!

In web3, almost every transaction relies on infrastructure provided by closed-source, centralized infrastructure providers who you simply have to trust not to misuse your data. We’re talking about RPC providers like Infura/Alchemy, the engine that keeps the entire crypto rocket flying, supporting billions of RPC calls daily. But unlike the crypto system they support, they are highly centralized black boxes which are entirely closed source.

Want to know what your crypto wallet is exposing to RPC providers?

Check DERP now

Introducing RPCh

The only private, secure, and decentralized gateway to the blockchain. And the first real protection against data harvesting from RPC providers.

Chart comparing other RPC providers Centralization and Privacy vs RPCh.

Even if your provider is trustworthy, handling vital metadata and sensitive information in this way poses a significant risk to privacy and security. RPCh plugs this leak by routing requests and responses through the HOPR mixnet, completely obscuring your metadata to all observers, including your provider.

Thanks to our SDK, RPCh integrates seamlessly with wallets. Users won't notice the difference, but everyone will benefit from the massive increase in privacy.

Diagram of HOPR’s solution to the existing metadata problem

    RPCh Guarantees:

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    Completely private transactions

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    Seamless integration

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    Competitive pricing + 2 months free access

Attack Vectors

Common attack vectors users are exposed to through the data their RPC provider collects.

Metamask Linkability

RPC providers can be pressured by third parties to disclose user data or even censor particular users or transactions.

NFT Frontrun

RPC providers can harvest users’ data and metadata and exploit them for gain, including harmful new kinds of MEV.


Decentralized web3 RPC providers can actually be LESS private than their centralized equivalents. When anyone can host an RPC endpoint, it’s crucial that users’ metadata is protected.

What Makes RPCh Unique?

The combination of these three USPs creates a stronger privacy solution than TOR or any VPN.

Two arrows blending represeting Packet Mixing

Packet Mixing

For complete metadata and data privacy.

A Decentralized Network graph

Decentralized Network

For a trustless and private solution.

A hand holding a HOPR token

Proof of Relay

To securely incentivize node runners.

1. Packet Mixing

Each node combines multiple packets from different messages, occasionally delaying certain packets and adding them to future mixing cycles. These are transferred across the mixnet as indistinguishable bundles, separated and mixed at every node for complete privacy.

2. Decentralized Network

The HOPR network is a decentralized incentivized mixnet, ensuring complete data and metadata privacy for everyone who uses it. Data is sent via multiple hops, so no-one but the sender and receiver know the origin, destination, or content of a data transfer.

3. Proof-of-Relay

HOPR’s unique proof-of-relay mechanism means every node runner is incentivized to correctly relay data in exchange for HOPR tokens. Anyone can run a HOPR node to earn HOPR tokens and contribute to online data privacy.


RPCh Beta (Available Right Now)


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    Wallet SDK

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    Docker connector

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    HOPR entry & exit nodes operated exclusively by RPCh

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    Centralized discovery platform

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    Centralized funding service

Beta, "What does this mean?"

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The Beta release already offers privacy far beyond any VPN setup or proxied RPC providers.

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    Data is routed through separate entry/exit nodes instead of a single proxy

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    Routing is dynamic, with every request receiving a different combination entry & exit nodes

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    Requests and responses are segmented and reformatted as Sphinx packets which are indistinguishable to an observer

The dynamic routing by itself already provides a greater disassociation from your IP than a VPN you change 10 times a second. But this version also comes with two intermediaries, protection against network observation and a complete integration of all the key architectural components.

Trust assumption: All entry and exit nodes are controlled by RPCh. We won’t perform a timing analysis! But you should know that we could. This will disappear by Beta.

RPCh Beta (next release)

    New Features:

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    Randomized entry & exit nodes selected from RPCh node runners

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    Honesty score added to the discovery platform

Beta, "What does this mean?"

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RPCh Beta adds decentralization to the ecosystem by allowing all registered RPCh node runners to function as entry & exit nodes. This comes with the additional features of registered nodes having a reliability score the SDK can use to improve network stability and incentivise high-performing nodes.

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    No need to trust RPCh to not perform timing attacks

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    Your tx skips the public Ethereum tx pool reducing vulnerability to MEV attacks

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    Network stability and relay consistency improve with the reliability score

Trust assumption: With significant effort, the entry and exit nodes controlled by random individual RPCh node runners could collaborate to perform timing analysis. This is extremely unlikely, but will be fixed by v1.

RPCh v1

    New Features:

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    Multi-hop functionality

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    Packet mixing

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    Light client verification

What does this mean?

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RPCh v1 introduces multiple intermediary nodes between the entry and exit node, which allows RPCh to utilise the full functionality of the HOPR mixnet. Along with this we introduce light client verification through Kevlar/Helios to provide security against your RPC provider tampering with your response.

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    Parties that observe the network such as ISPs or your favourite three letter agency will have a significantly harder time analysing traffic

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    Your wallet no longer blindly trusts your RPC provider to not tamper with your data

Trust assumption: Timing analysis is now extremely difficult due to the delayed and randomized mixing cycles introduced with multi-hop functionality.

RPCh v2

    New Features:

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    Trust minimization through client side packet creation

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    Return pathing for relays

What does this mean?

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The packet creation process for initiating relays will be executed by the client, reducing reliance on the discovery platform. And through the use of the return pathing feature of the HOPR mixnet, exit nodes will no longer see the entry nodes they are returning responses to.

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    Censorship resistance, as wallets don’t just trust the discovery platform

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    Increased security, as exit nodes no longer see the entry node they would like to collude with

Trust assumption: There is at least one honest node on the entire multi-hop relay. This is the strongest privacy offering of any transport layer privacy solution to ever be developed. A relay would have to consist entirely of colluding nodes to accurately confirm the source and destination of a relay.

Creating RPCh

Every time we look under the hood of a web3 service, we find it’s leaking unacceptable amounts of data and metadata. Especially large public RPC providers who are reckless in their handling of billions of RPC calls daily. At HOPR, we knew we had to do something to address this massive privacy concern, which is why we built RPCh.

DERP replicates an RPC provider and displays your requests in real-time, highlighting the privacy pitfalls of public RPC providers. Many of today’s DeFi services leak identifying metadata, even if you don’t make a transaction. This shows how vital a transport layer privacy solution like HOPR will be in building web3.

Designers, mentors and organizers of the Wallet UX Hackathon 2022.

Clear and simple UX design is a fundamental part of bringing choices about privacy to users. At the first-ever crypto UX hackathon, participants designed an implementation of the HOPR protocol as a Snap within the MetaMask wallet. These designs were used to inform implementation decisions for later hackathons and the internal development of RPCh.

At the Infinite Hackathon , we challenged hackers to integrate RPCh with live crypto wallets of their choice. This was the first attempt to implement RPCh and was a resounding success with three seamless integrations: Block Wallet, Tally Ho! and Frame.

The three hackers responsible for our first ever RPCh integration.

We have officially launched RPCh and dedicated a new sub-team within HOPR to its future development and integration. This commitment comes with exciting developments, from follow-up events to new partnerships. Keep an eye out, as the coming months will be eventful for both HOPR and RPCh!

Logo of RPCh over a blue gradient background


What does RPCh solve?

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Ethereum RPC providers can see IP addresses and other metadata of Ethereum users. That is a liability for users, wallets and RPC providers alike.

What is RPCh?

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An RPC provider that works exclusively via the HOPR network and is thus fully metadata private on the transport layer.

How does RPCh work?

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RPCh uses the following features to serve as a completely private RPC provider:

  • 1. Thin wallet connector to relay RPC requests & responses via the HOPR network instead of HTTP(S).

  • 2. HOPR exit node connector to relay RPC requests & responses to/from a standard Ethereum RPC endpoint (e.g. an Ethereum execution layer client).

  • 3. Out-of-the-box ability to verify the integrity of RPC responses.

  • 4. Highly scalable, available & performant Ethereum node infrastructure that is used by RPCh clients.

How do wallets & dApps use RPCh?

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Where can I view previous wallet integrations?

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- 0xFrame:

- TallyHo:

- BlockWallet:

How much does integration cost?

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The integration & usage for every crypto wallet of RPCh is easy and seamless. Our team will support the integration with the standard SDK. It’s as simple as exchanging your current RPC provider with any other RPC provider. Integration is free. Monthly costs depend on your usage. Prices are competitive.

What is the difference between RPCh and HOPR?

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RPCh is a product made possible by building on top of the HOPR protocol.

What is the HOPR network?

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The HOPR network is the (not so) secret sauce that makes RPCh metadata private. HOPR is an incentivized mixnet that is much more private than a VPN or even Tor. Thanks to its proof-of-relay mechanisms, the mixnode operators get paid for forwarding packets in the decentralized HOPR network and thus provide privacy for both senders and receivers. ->