constant-k Docs

Reference documentation for constant-k: Solana JSON-RPC over HTTPS and WebSocket, Kaldera and Turbo Kaldera gRPC streaming, and the ShredPrism shred feed.

Getting started

Quickstart

An account, an API key and a first Solana RPC call.

Overview

Products, endpoints, plans and authentication.

Solana RPC

HTTP methods

Every JSON-RPC method, with parameters, examples and a request playground.

WebSocket methods

Subscriptions for accounts, programs, logs, signatures and slots.

Transaction v1

The SIMD-0385 changes, and the parameter that reads require.

Streaming

Kaldera gRPC

Yellowstone gRPC streams of accounts, transactions and slots, after execution.

Turbo Kaldera

The same Subscribe API, served from shred data before execution.

ShredPrism

The full leader shred feed, unfiltered.