What is Altude?
Altude’s Gas Station API sponsors Solana transaction fees so your users never need SOL to transact. Your application builds and signs transactions locally — users keep control of their keys. Altude validates, adds the fee payer, and relays to the network.Why Gas Station?
No gas friction
Users transact without acquiring SOL first. Altude sponsors fees transparently in the background.
Fee management
One API key selects your cluster, RPC node, and fee payer. No manual node configuration required.
Enterprise ready
Built for production with audit-ready transaction records and API-key-scoped access control.
Developer first
REST API with typed SDKs for TypeScript, Android/Kotlin, and more platforms.
Get started in minutes
1
Get your API key
Sign up at altude.so and create an application to receive your API key.
2
Make your first call
Send a sponsored transaction with a single API call — Altude handles fee payer attachment and relay.
3
Ship to production
Move from
devnet to mainnet-beta by updating the network in your API key configuration.How Gas Station works
Your app creates and signs a transaction locally. Altude validates it, attaches the sponsored fee payer, and relays it to the Solana network.1
Create and sign
Your app builds a transaction. The user signs it locally — private keys never leave the device.
2
Gas Station sponsors
Altude validates the transaction, adds the fee payer, and optimizes for the selected cluster.
3
Relay and confirm
The transaction is submitted to Solana. Your app receives the signature for confirmation tracking.
Ready to build?
Explore the API
Reference documentation for all Gas Station API endpoints.
Wallet integrations
Use Gas Station alongside Turnkey, Privy, Crossmint, Dynamic, or any wallet provider.
Migrating from Kinetic?
Step-by-step guide for teams upgrading from the Kinetic API.
Need help? Join the developer community on Discord or reach out at andrew@altude.so.