INDEPENDENT EXECUTION VERIFICATION FOR AGENTS

Verify the trade.
Then let the agent sign.

A $0.02 x402 preflight that independently checks a Solana trade against Jupiter's live market, evaluates token risk, and optionally simulates the actual transaction before execution.

Try field-level demo

$0.02launch price / check

V2Jupiter live verification

x402USDC machine payment

503no settlement if deps fail

Agent proposes tradeMint pair + amount, optional quote/tx

Preflight verifies independentlyJupiter V2 + token risk + RPC

Allow / review / blockStructured decision + evidence

PRODUCTION

Verification stack

Checking runtime configuration…

Live marketchecking

Token riskJupiter Tokens V2

Simulationchecking

x402 settlementSolana USDC

PLAYGROUND

Free field check

no payment

This demo validates supplied quote fields only. The paid endpoint adds independent live market and token verification.

RESULT

Ready

—

Run the free demo to see the deterministic field-level scoring contract.

INTEGRATE

One paid call before execution.

Send an ExactIn trade request. Optionally attach the agent's quote and unsigned transaction. Preflight independently obtains a current Jupiter V2 order, then returns evidence and a policy-friendly decision.

POST /api/check · x402 required

POST https://preflight-agent.netlify.app/api/check
content-type: application/json

{
  "trade": {
    "inputMint": "So11111111111111111111111111111111111111112",
    "outputMint": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "1000000000"
  },
  "quote": { "...": "optional submitted quote" },
  "transactionBase64": "optional legacy/v0 transaction"
}

Independent price check

Uses Jupiter Swap API V2 /order with no taker to obtain current best-price output without trusting the caller's quote.

Token-risk layer

Uses Jupiter Tokens V2 metadata: verification, organic score, liquidity, holder count, authority status, concentration, and pool age.

Transaction simulation

If a legacy/v0 base64 transaction is supplied, a private Solana RPC simulation is required. Dependency failure returns 503 without settlement.

Agent-native billing

x402 v2 exact payment in Solana USDC. The service verifies payment first, performs the check, then settles only after a billable result exists.

RESPONSE

Evidence, not just a score.

The contract separates the final decision from market verification, token risk, and simulation. Agents can enforce their own policy on top of the response.

{
  "confidence": "high",
  "recommendation": "simulation_passed_review_binding_before_sign",
  "analysis": {
    "score": 96,
    "decision": "allow",
    "findings": []
  },
  "verification": {
    "market": { "status": "verified", "router": "jupiterz" },
    "tokenRisk": { "status": "verified" },
    "simulation": { "status": "passed" }
  }
}

SCOPE

Designed to be defensible.

Preflight screens execution conditions; it is not a smart-contract audit, rug-pull guarantee, or investment recommendation. A simulated transaction is not yet cryptographically decoded and bound to the submitted quote, so the API states that limitation instead of pretending otherwise.

Verify the trade.Then let the agent sign.