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HostDeFi EVM Swap Price Quote
x402
HostDeFi EVM Swap Price Quote is a paid API for AI agents from rpc.hostdefi.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-30).
Returns an estimated price quote for swapping tokens on EVM chains, given a sell token, buy token, chain ID, and sell amount.
Price / call$0.002
Success—
StatusUnknown
How this service works
HostDeFi is a Solana DEX with a free token safety scanner. Best-route swaps through Jupiter, EVM trading across 7 chains, native bridging, and live token risk grades. No KYC, 1% flat fee.
Output
Returns a JSON object with ok status, plan metadata, a boolean estimate flag indicating the quote is an approximation, the estimated buyAmount in the buy token's base units, the minimum guaranteed buyAmount, and optionally the native token USD price.
Example use cases
Pre-trade swap rate check on Base
“Before I swap, can you tell me how much WETH I'd get if I sell 500 USDC on Base chain (chain ID 8453)? Sell token is 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48, buy token is native.”
Cross-token price comparison on Arbitrum
“I want to know how many ARB tokens I'd receive if I sold 2000000000000000000 wei of ETH (native) on Arbitrum (chain ID 42161) — what's the estimated buy amount?”
DeFi bot pre-execution quote
“Check the current swap estimate for buying 0x6B175474E89094C44Da98b954EedeAC495271d0F DAI with 1000000 USDC on Optimism (chain ID 10) so I can decide whether to execute the trade.”
Technical details
Endpoint
GEThttps://rpc.hostdefi.com/api/v1/x402/swap/evm/price?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a fast, non-executing price estimate for an EVM token swap across any of the 7 supported chains without committing to a transaction. It is ideal for pre-trade checks, portfolio simulations, or arbitrage scanning. Prefer this over on-chain RPC calls when you want a simple REST-based quote with no KYC and cross-chain support in one API.
Side effects
- Missing required query parameters (chainId, buyToken, sellToken, sellAmount) result in a 400 error
- Unsupported chain ID returns an error or empty response
- Invalid token address format causes a bad request response
- Network congestion or DEX liquidity issues may result in degraded or unavailable quotes
- Payment of 0.002 USDC via x402 protocol required; missing payment header returns 402
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"meta": {
"plan": "x402"
},
"estimate": true,
"buyAmount": "…",
"nativeUsd": null,
"minBuyAmount": "…"
}
}Tags
x402
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