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BaseDue Token Liquidity & Exit Price Checker
x402
BaseDue Token Liquidity & Exit Price Checker 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 liquidity depth, best DEX pool, spot price, and exit capacity for an ERC-20 token on Base, estimating how much USD can be extracted before hitting a price impact limit.
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
Returns a JSON object with: ok status, ETH/USD price, per-token results including best pool address and venue, maximum USD that can be extracted within the price impact limit, spot price in USD, quote asset depth, token reserves, price impact percent, slippage USD amount, and a verdict on whether the requested exit size is feasible. Also includes a note clarifying that Uniswap V3 pools are excluded and results are lower bounds.
Example use cases
Pre-trade liquidity check for large sell
“Before I sell, check if I can exit $8000 worth of the token at 0xcbb7c0000ab88b473b1f5afd9ef808440eed33bf on Base without more than 1.5% price impact — tell me the best pool and expected slippage.”
Spot price and depth scan for portfolio token
“What's the current spot price and liquidity depth for the token at 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913 on Base? I want to know which DEX pool is deepest.”
Multi-token liquidity comparison
“Compare the liquidity depth and best exit venues for these three Base tokens: 0xcbb7c0000ab88b473b1f5afd9ef808440eed33bf, 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913, and 0x4200000000000000000000000000000000000006.”
Technical details
Endpoint
GEThttps://api.firstmention.uk/s/basedue/price?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need on-chain liquidity analysis specifically for tokens on the Base network, particularly to estimate exit capacity before executing a large sell. Prefer this over generic price APIs when you need DEX-level depth, pool identification, price impact modeling, and slippage estimation rather than just a spot price. Best suited for DeFi agents performing pre-trade due diligence or portfolio liquidation planning on Base.
Side effects
- Invalid or non-existent token address returns error or ok:false
- Token with no liquidity pools on Base returns empty venues array
- Requested exit size exceeds available liquidity, returning ok:false with impact details
- Malformed 0x address format causes input validation failure
- Rate limiting or payment failure (x402) blocks the request
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"note": "Capacity is a LOWER BOUND: Uniswap V3 pools are excluded from the size model. Constant-product model; comparable in order of magnitude, not exact.",
"chain": "base",
"ethUsd": 2343.51,
"results": [
{
"ok": true,
"best": {
"pool": "0x2578365b3dfa7ffe60108e181efb79feddec2319",
"venue": "aerodrome",
"maxUsdOut": 3230.39,
"quoteAsset": "WETH",
"maxTokenSell": 0.040595
},
"size": {
"ok": false,
"pool": "0x2578365b3dfa7ffe60108e181efb79feddec2319",
"venue": "aerodrome",
"usdOut": 4923.79,
"impactPct": 1.5242,
"slippagePct": 1.524,
"slippageUsd": 76.21,
"requestedUsd": 5000
},
"token": "0xcbb7c0000ab88b473b1f5afd9ef808440eed33bf",
"symbol": "cbBTC",
"venues": [
{
"pool": "0x2578365b3dfa7ffe60108e181efb79feddec2319",
"venue": "aerodrome",
"maxUsdOut": 3230.39,
"quoteAsset": "WETH",
"maxTokenSell": 0.040595,
"spotPriceUsd": 80380.2,
"quoteDepthUsd": 324023.6,
"tokenReserveUi": 4.029
}
],
"impactLimitPct": 1
}
],
"endpoint": "exit"
}
}Tags
x402
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