Simple .NET 8 client for the Jupiter DeFi API on Solana: swaps (V2 + Ultra), limit orders and DCA (Trigger V2), token prices, metadata and portfolio positions. Plain HTTP, no Solana SDK dependency - signing stays on your side.
Jupiter is the main DEX aggregator on Solana, but its official SDKs target TypeScript/Python. I found no maintained C# client for the current API surface (Solnet.JupiterSwap retired), so I wrote this from the official OpenAPI specs and checked it against live API responses.
A GUI demo for this library lives in @Zelwel0's fork. Self-contained Windows build, no .NET needed: release v0.2.0
Two clients, one per API base:
| Domain | Client | What it does |
|---|---|---|
| Swap V2 | JupiterSwapClient |
quote + unsigned v0 tx (/order), raw instructions (/build), landing (/execute) |
| Ultra V1 | JupiterSwapClient |
opinionated swap in one call, fee breakdown (signature/priority/rent), gasless support |
| Price V3 | JupiterSwapClient |
USD prices, 24h change, liquidity - up to 50 mints per call |
| Tokens V2 | JupiterSwapClient |
search, tags, top lists, new tokens - metadata + safety metrics |
| Portfolio V1 (beta) | JupiterSwapClient |
Jupiter product positions, platforms, staked JUP |
| Trigger V2 | JupiterTriggerClient |
limit orders (single/OCO/OTOCO, trailing) and DCA: challenge-response auth, vault, deposits, create/update/cancel/history |
You need the .NET 8 SDK, a Solana wallet (the secret key only when you sign real swaps or orders) and a Jupiter API key from the Jupiter Developer Portal. The key is free; Tokens V2 and Portfolio do not work without one.
git clone https://github.com/Lak1Lay/Solgrid.Jupiter
cd Solgrid.Jupiter/src && dotnet build -c Releaseusing Solgrid.Jupiter;
using var client = new JupiterSwapClient(new JupiterSwapClientOptions
{
ApiKey = Environment.GetEnvironmentVariable("JUPITER_API_KEY") // optional
});
var prices = await client.GetPricesAsync(new[]
{
"So11111111111111111111111111111111111111112" // SOL
});Keyless calls run at 0.5 requests per second, a free key raises that to
1 RPS. Both clients throttle to MinRequestInterval and retry once on
HTTP 429. Trigger V2 adds a challenge-response JWT on top of the key,
valid 24h with no refresh endpoint.
Full snippet for every endpoint, including signing and the Trigger V2 auth flow: EXAMPLES.md.
Pre-release. The public API may change until 1.0.0.
MIT