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Cacherpc

Cacherpc is a self-hosted Rust server binary that sits in front of a Solana validator or cluster as its public JSON-RPC entry point. It caches getAccountInfo and getProgramAccounts responses and uses PubSub to keep requested information updated, while passing other methods through to the upstream endpoint.

Explore the practical guide ↓

Independent OpenViST project profile, based on linked sources.

Cacherpc — OpenViST project profile in Infrastructure.
OpenViST project illustration. See the linked sources for product details.
Understand the project

Practical overview

When it fits

Consider Cacherpc when operating a self-hosted Solana JSON-RPC endpoint and evaluating a cache layer for frequent account or program queries. Its documented status as an early-stage project not ready for production use should shape that evaluation.

Who it is for

  • Operators running a Solana validator or cluster RPC endpoint who want a cache layer in front of it.
  • Teams serving Solana clients that frequently request account or program data and need controls over cache size and upstream request concurrency.

Documented uses

  • Reduce repeated getAccountInfo and getProgramAccounts requests reaching a validator.
  • Keep cached account and program information updated using a PubSub connection.
  • Set cache limits, time-to-live, request concurrency, queues and timeouts for the service.
  • Expose service metrics in Prometheus-compatible format.
Before you choose

Requirements & limits

The project is available as a public GitHub repository under the MIT license. The documented build requires Rust and Cargo.

  • Only getAccountInfo and getProgramAccounts are listed as implemented caching methods; other methods pass through to the validator.
  • The service needs upstream JSON-RPC HTTP and PubSub endpoints for its documented role.
  • Cache size and time-to-live, request limits, queue sizes, WebSocket connections and timeout behavior are configurable.
  • The project README warns that it is early-stage and not ready for production use.

Check current requirements in the official documentation. Source-based guidance does not mean OpenViST has run or independently tested this project.

Source-based practical guide

Build the Cacherpc server binary

Build the documented release binary for a self-hosted Solana RPC cache.

Before you start

  • Rust compiler and Cargo, as specified by the project README.

Steps

  1. From the repository, run the command below.

    Documented command
    cargo build --release

  2. Use the resulting ./target/release/rpccache binary as the documented server executable.

Expected outcome

A release-mode Cacherpc server binary is built and available at the documented path.

Guide limitations

  • This covers building the binary only; it does not configure or launch the service.
  • The README says the project is an early-stage work in progress and is not ready for production use.
Documentation 1 ↗
Evidence and transparency

Sources & review

Official repository ↗
Source record details
Source availability
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Sources checked
16 October 2026
Original website title
bestarch-ae/cacherpc · Official homepage title · retained in its source language
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