Jupiter Solana Swap Quote API

MCP Server x402 License: MIT

Solana swap quotes via Jupiter aggregator -- best route, price impact, slippage, priority fees included. Pay-per-call via x402 (USDC on Base L2) -- no API key, no signup, no rate-limit wall.

Part of the klymax402 marketplace -- 100 x402 micropayment APIs for AI agents, one wallet, USDC on Base.

Quickstart -- MCP

Add to your MCP client config (Claude Desktop, Cursor, ElizaOS, etc.):

{
  "mcpServers": {
    "jupiter-quotes": {
      "url": "https://jupiter-quotes.api.klymax402.com/mcp"
    }
  }
}

Quickstart -- HTTP (x402)

curl "https://jupiter-quotes.api.klymax402.com/api/quote?inputMint=...&outputMint=...&amount=..."
# -> 402 Payment Required, with an x402 payment challenge in the response body

Any x402-aware client (@x402/fetch, x402-agent-tools, ATXP) handles the 402 -> sign -> retry cycle automatically.

Tools

Tool	Method	Path	Price	Description
jupiter_get_swap_quote	GET	/api/quote	$0.002	Get best swap quote on Solana via Jupiter aggregator

jupiter_get_swap_quote

Use this when you need a swap quote on Solana. Returns the best route via Jupiter aggregator across all Solana DEXes with price impact and fee analysis.

Parameters

Name	Type	Required	Description
inputMint	string	yes	Input token mint address or symbol (SOL, USDC, USDT). e.g. So11111111111111111111111111111111111111112 or SOL
outputMint	string	yes	Output token mint address or symbol (SOL, USDC, USDT). e.g. EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v or USDC
amount	string	yes	Amount in raw lamports/smallest unit. e.g. 1000000000 = 1 SOL, 1000000 = 1 USDC
slippage	number	no	Slippage tolerance in basis points. Default 50 (0.5%). e.g. 100 = 1%

Returns

• inputToken -- input token symbol and mint address
• outputToken -- output token symbol and mint address
• inAmount -- input amount in raw units
• outAmount -- expected output amount in raw units
• priceImpact -- price impact percentage (e.g. 0.12 = 0.12%)
• minimumReceived -- minimum output after slippage tolerance
• route -- array of DEX hops used (e.g. Raydium -> Orca)
• priorityFee -- recommended priority fee in lamports

Example response:

{"inputToken":{"symbol":"SOL","mint":"So111..."},"outputToken":{"symbol":"USDC","mint":"EPjF..."},"inAmount":"1000000000","outAmount":"67450000","priceImpact":0.05,"minimumReceived":"67112750","route":["Raydium V4"],"priorityFee":5000}

When to use: executing any Solana token swap. Essential for getting the best price, understanding slippage, and choosing the optimal route.

Example agent prompts

• "A swap quote on Solana"

Payment

• Protocol: x402 -- HTTP-native pay-per-call, no signup, no API key
• Network: Base L2 (eip155:8453)
• Asset: USDC
• Facilitator: Coinbase CDP (primary), PayAI (fallback)
• Also reachable via ATXP (OAuth-wrapped x402, RFC 9728 protected-resource metadata)

Part of klymax402

100 x402 micropayment APIs for AI agents -- one wallet, USDC on Base, zero signup.

• Catalog: https://klymax402.com/llms.txt
• Full API reference: https://klymax402.com/llms-full.txt
• Live stats: https://klymax402.com/stats

License

MIT