Solana Foundation launches Kora, enabling fee-free trading and custom fee tokens
Alyssa Davidson
Posted: December 23, 2025 4:39 AM Updated: December 23, 2025 4:39 AM
Correction and fact check date: December 23, 2025, 4:39 AM
briefly
The Solana Foundation launched Kora, a secure and flexible fee bearer and signing node that enables gasless transactions, custom fee tokens, and remote signing for the Solana ecosystem.
The Solana Foundation, an organization dedicated to supporting the growth, decentralization, security, and adoption of the Solana blockchain, has launched Kora, a fee broker and signature node designed for the Solana ecosystem. Kora provides developers with a flexible infrastructure by enabling fee-free transactions, use of custom fee tokens, and secure transaction signing.
It was developed to address Solana’s lack of a modern, standardized solution for fee sponsorship and remote signing. This allows for full fee backing, payments in any token, including stablecoins, and offloading of signatures to a turnkey or secure environment such as AWS KMS. The platform supports six remote signers and provides metrics to monitor funding levels.
The solution allows users to perform gasless transactions and pay fees in tokens such as USDC, BONK, or the application’s native token, while managing all transactions requiring trusted signers. It is designed to improve the user experience by eliminating the need for SOL, providing revenue control by collecting fees in a variety of tokens, and providing production-ready features including security verification, rate limiting, and monitoring. JSON-RPC API and TypeScript SDK simplify integration and support deployment on multiple platforms, including Docker and Railway.
Built with Rust and complemented by the TypeScript SDK, Kora supports JSON-RPC 2.0, multi-signer options including Solana private keys and third-party services like Turnkey and Privy, authentication via API keys, HMAC, or none. Its architecture includes configurable validation rules, full Token-2022 support, Redis caching, rate limiting, and Prometheus metrics for security key management and monitoring. Fee payer protection policies will also be strengthened.
Kora runs with full auditing and robust configuration support.
Kora also includes a standard RPC server and CLI for signing transactions and paying fees in funded wallets using Solana Keychain, a backend-agnostic signing library available in TypeScript and Rust. Solana Keychain supports multiple backends, including AWS KMS, Fireblocks, Privy, Turnkey, and HashiCorp, with additional integrations planned.
The system comes with standard TOML configuration for managing fee payer policies, transaction validation, method controls, program and token whitelists or blacklists, and custom policies. Additionally, Kora is fully audited and differential fuzz tested with Runtime Verification to ensure a high level of security and reliability.
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About the author
As MPost’s resident journalist, Alisa specializes in the broad areas of cryptocurrencies, zero-knowledge proofs, investing, and Web3. With a keen eye for new trends and technologies, she provides comprehensive coverage to inform and engage readers about the ever-evolving digital financial landscape.
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As MPost’s resident journalist, Alisa specializes in the broad areas of cryptocurrencies, zero-knowledge proofs, investing, and Web3. With a keen eye for new trends and technologies, she provides comprehensive coverage to inform and engage readers about the ever-evolving digital financial landscape.
more articles