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Base Intel API — Transaction Preflight
x402
Base Intel API — Transaction Preflight is a paid API for AI agents from base-intel-api.jakemaxsigal.workers.dev, paid per call via x402, $0.25/call, status unknown (last checked 2026-10-09).
Returns an ALLOW, WARN, or BLOCK trade-risk decision for a Base token by combining on-chain contract safety analysis with live DEX liquidity and 24-hour activity data.
Price / call$0.25
Success—
StatusUnknown
How this service works
One-call ALLOW, WARN, or BLOCK trade-risk decisions for Base agents, combining contract safety with live DEX liquidity and activity. Paid per result in USDC over x402.
Output
A JSON object containing: a top-level decision field (ALLOW, WARN, or BLOCK), a numeric risk score (0–100), a riskLevel string (low/medium/high), a token object with address, symbol, grade (A–F), safetyScore, and flags array, a market object with pairCount, maxLiquidityUsd, and totalVolume24hUsd, a reasons array explaining the decision, and a methodology description.
Example use cases
Autonomous agent trade guard
“My trading bot is about to buy token 0x4ed4E862860beD51a9570b96d89aF5E1B0Efefed on Base — can you run a preflight check and block the trade if it comes back as high risk?”
New memecoin rug check
“I found a new token on Base at address 0xABC123... — can you screen it for rug-pull flags, check its DEX liquidity, and give me a safety grade before I put any money in?”
DeFi wallet risk review
“My wallet 0xWallet123... is about to interact with a Base token at 0xDEF456... — run a preflight on that token contract and tell me the risk level and any red flags I should know about.”
Technical details
Endpoint
GEThttps://base-intel-api.jakemaxsigal.workers.dev/preflight?utm_source=zero.xyzWhen to prefer
Choose this endpoint when an AI agent or autonomous trading bot needs a single-call, structured go/no-go decision before executing a token swap or DeFi interaction on Base. It is purpose-built for Base L2 and combines contract heuristics with live DEX liquidity in one response, making it faster and more actionable than assembling raw on-chain data yourself. Prefer it over generic blockchain APIs when you need an opinionated ALLOW/WARN/BLOCK verdict with human-readable reasons.
Side effects
- Missing or invalid token address returns an error — token query param is required
- Unrecognized or non-Base contract address may return limited data or error
- Payment not completed via x402 returns 402 Payment Required
- Rate limiting or downstream DEX data unavailability may cause transient failures
- Very new tokens with no DEX history may have incomplete market data
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"score": 68,
"token": {
"flags": [],
"grade": "C",
"symbol": "USDC",
"address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"safetyScore": 55
},
"market": {
"pairCount": 12,
"maxLiquidityUsd": 5000000,
"totalVolume24hUsd": 1200000
},
"reasons": [
"Contract is upgradeable and can change after this check.",
"At least one Base liquidity pool exceeds $100,000."
],
"decision": "WARN",
"riskLevel": "medium",
"methodology": "Contract heuristics plus live Base DEX liquidity and 24-hour activity."
}
}Tags
x402
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