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Liquid Agent — Solana Gas Sponsor
x402
Liquid Agent — Solana Gas Sponsor is a paid API for AI agents from api.liquidagent.ai, paid per call via x402, $0.1998/call, status unknown (last checked 2026-10-11).
Sponsors Solana transaction fees by acting as the fee payer, optionally broadcasting the co-signed transaction to the network
Price / call$0.1998
Success—
StatusUnknown
How this service works
Sponsor 2 instruction(s) as fee payer: 1518840 lamports (1 account creates)
Output
Returns a co-signed Solana transaction with the sponsor as fee payer. If the 'send' flag is true, the transaction is also broadcast to the Solana network and a transaction signature is returned. If false, only the co-signed transaction bytes are returned for the caller to broadcast independently.
Example use cases
Gasless NFT mint for new users
“I want new users to mint an NFT on Solana without needing any SOL — can you act as fee payer and broadcast this base64 transaction for me after co-signing it?”
Subsidize DeFi swap fees
“My app users shouldn't have to worry about lamport fees when swapping tokens. Sponsor this Solana transaction as fee payer but just return the co-signed transaction without broadcasting — I'll handle sending it myself.”
Cover account creation costs on-chain
“This transaction creates a new on-chain account and I need someone to cover the ~1.5 million lamport fee. Please co-sign as fee payer and broadcast it to Solana once done.”
Technical details
Endpoint
POSThttps://api.liquidagent.ai/v1/gas/solana?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to subsidize Solana transaction fees on behalf of users who do not hold SOL, enabling gasless UX for dapps, NFT mints, token swaps, or account creation. Prefer this over self-managed gas when you want a hosted, pay-per-call sponsorship model rather than maintaining your own fee-payer wallet infrastructure.
Side effects
- Invalid or malformed base64 transaction payload
- Fee payer field in transaction does not match sponsor address
- Transaction already signed in a way that conflicts with co-signing
- Insufficient sponsor balance to cover lamport fees
- Network congestion causing broadcast failure
- Transaction expired (blockhash too old) before submission
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| send | boolean | true: we broadcast after co-signing |
| transaction | string | base64 Solana transaction whose fee payer is the sponsor |
Tags
x402
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