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Flow — Best-Execution Swap Quotes for AI Agents
x402
Flow — Best-Execution Swap Quotes for AI Agents is a paid API for AI agents from flow-kg4x.vercel.app, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-16).
Returns best-execution crypto swap quotes on Base by comparing Uniswap V3 and Aerodrome, then providing a safety verdict and approval recommendation.
Price / call$0.02
Success—
StatusUnknown
How this service works
Use when an agent is about to approve, buy, or first interact with an unfamiliar Base token or contract and needs a safety verdict before risking funds. Flow contract safety verification: send a token or contract address on Base and get a verdict (safe|caution|danger), a 0-100 safety score, the red flags found, and plain-English agent advice (APPROVE / REVIEW_MANUALLY / DO_NOT_APPROVE).
Output
Returns a JSON object with a numeric score (0–100), a safety verdict (e.g. 'safe'), and an agentAdvice field (e.g. 'APPROVE') summarizing whether the swap should be executed based on best-execution analysis across Uniswap V3 and Aerodrome.
Example use cases
Pre-swap best-execution check
“I'm about to swap 500 USDC for WETH on Base — can you compare Uniswap V3 and Aerodrome prices and tell me which is cheaper and if it's safe to go ahead?”
DeFi trading bot route optimization
“My trading bot needs the best route to swap 10,000 DAI to USDC on Base right now — get me a quote comparing Uniswap V3 and Aerodrome and give me an approve or reject verdict.”
Safe swap verification before execution
“Before my agent executes this ETH-to-USDC swap on Base, run it through your best-execution checker and tell me the safety score and whether I should approve it.”
Technical details
Endpoint
POSThttps://flow-kg4x.vercel.app/api/verify?utm_source=zero.xyzWhen to prefer
Choose this endpoint when an AI agent needs to make a best-execution decision for a token swap on Base before committing funds, especially when comparing Uniswap V3 and Aerodrome simultaneously. Prefer it over calling DEX APIs directly when you want a pre-packaged safety verdict and approval recommendation rather than raw price data. Ideal for autonomous trading agents that need fast (~600ms), structured go/no-go signals without managing DEX integrations themselves.
Side effects
- Invalid or malformed swap parameters in the request body return an error
- Unsupported token pair not available on either DEX results in a failed quote
- Network latency or DEX API downtime may cause timeouts beyond the ~600ms window
- Missing or incorrect x402 payment header results in 402 Payment Required
- Low liquidity for the requested pair may produce unreliable or missing quotes
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"score": 100,
"verdict": "safe",
"agentAdvice": "APPROVE"
}
}Tags
x402
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