Jupiter Solana Swap Quote API

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.):

config.json

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

Quickstart -- HTTP (x402)

Terminal

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`	$0.005	Get best swap quote on Solana via Jupiter aggregator
`jupiter_get_swap_quote`	POST	`/api/quote`	$0.005	Get best swap quote on Solana via Jupiter aggregator (POST variant)

`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:

config.json

{"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.

`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. POST variant of jupiter_get_swap_quote -- same params passed as JSON body instead of query string.

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:

config.json

{"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"
"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