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Basewatch Alerts — Base Chain New Pool Alert Feed
x402
Basewatch Alerts — Base Chain New Pool Alert Feed is a paid API for AI agents from api.firstmention.uk, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-29).
Returns scored alerts for newly discovered liquidity pools on Base, filtered by quote asset, liquidity depth, and risk score threshold
Price / call$0.01
Success—
StatusUnknown
How this service works
Pay-per-call HTTP APIs, paid with x402 in USDC on Base (eip155:8453): agentkit, api-change-check, basedue, basewatch, chainread, check-sanctions, chgwatch, company-facts, composite, edgar, feednews, pageaudit, solcheck, token-dd, txpreflight, walletcheck, webmd, webread, websearch, x402index. Each operation describes its service.
Output
A JSON object containing: a list of pool alerts each with pool address, risk score, letter grade, DEX venue, liquidity in USD, approximate age in minutes, token symbols, alert flags, and a human-readable reason string; plus summary counts (total returned, brand-new under 30 min), active filters, the current Base block number, and the endpoint name.
Example use cases
New pool sniping for DeFi traders
“Find me the newest USDC-quote pools on Base from the last 2000 blocks, with at least $5000 in liquidity and a score above 3, limited to the top 15 — I want to catch anything that just launched.”
Risk filtering for bot safety checks
“Pull Base chain pool alerts for the last 43200 blocks, only WETH quote pools with at least $2000 liquidity, and drop anything with a score below 5 — I need to screen out low-quality pools before my bot trades them.”
Monitoring brand-new pools under 30 minutes old
“Give me up to 10 Base pool alerts from the last 1000 blocks with any quote asset and at least $500 liquidity — I specifically want to see how many are brand new under 30 minutes old.”
Technical details
Endpoint
GEThttps://api.firstmention.uk/s/basewatch/alerts?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need real-time, risk-scored alerts for newly launched liquidity pools specifically on Base chain, with built-in filtering by quote asset, liquidity depth, and risk score. Prefer this over generic DEX screeners when you need structured alert objects with flags, grades, and reasons ready for automated decision-making, and when paying per-call via x402/USDC is acceptable.
Side effects
- Invalid or out-of-range query parameters (e.g. limit > 40 or blocks > 43200) return a 400 error
- Payment not provided or insufficient USDC results in 402 Payment Required
- No pools found matching filters returns ok:true with empty arrays
- Network or chain RPC issues may cause delayed or stale block data
- Overly restrictive min_score or min_liquidity_usd filters may return zero alerts
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"chain": "base",
"pools": [
{
"pool": "0x8f2a1c4b9e0d7f3a6b5c4d3e2f1a0b9c8d7e6f5a",
"grade": "ok",
"score": 5.11,
"venue": "aerodrome",
"liquidityUsd": 128400.55,
"ageApproxMinutes": 96,
"liquidityQuoteAsset": "USDC"
}
],
"alerts": [
{
"pool": "0x8f2a1c4b9e0d7f3a6b5c4d3e2f1a0b9c8d7e6f5a",
"flags": [],
"score": 5.11,
"venue": "aerodrome",
"reason": "quote-side depth $128401, age ~96m, venue aerodrome",
"tokens": [
{
"symbol": "WETH",
"decimals": 18
},
{
"symbol": "USDC",
"decimals": 6
}
],
"liquidityUsd": 128400.55,
"ageApproxMinutes": 96
}
],
"counts": {
"returned": 1,
"brandNewUnder30min": 1
},
"filters": {
"limit": 10,
"quote": "usdc",
"min_liquidity_usd": 500
},
"endpoint": "alerts",
"asOfBlock": 36512345
}
}Tags
x402
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