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CurveCall Sell Quote
x402
CurveCall Sell Quote is a paid API for AI agents from curvecall.onrender.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-12).
Computes the output amount, average price, and post-trade reserves for a sell-side trade on an AMM constant-product bonding curve, given virtual reserves and input amount.
Price / call$0.001
Success—
StatusUnknown
How this service works
Pay-per-call market math and token intel for AI agents, via x402.
Output
Returns a JSON object containing: fee charged, side ('sell'), amount_in, amount_out (quote asset received), average_price paid, price_after (new spot price), new_quote_reserves, and new_token_reserves — fully describing the trade outcome and resulting pool state.
Example use cases
Pre-trade slippage check for token sale
“Before I sell 10,000 tokens into a pool with 50 quote reserves and 2,000,000 token reserves, can you tell me my expected output, average fill price, and how much slippage I'm taking? Assume a 100 bps curve fee.”
Bonding curve price impact analysis
“I'm analyzing a meme token launch — if someone dumps 500,000 tokens into a pool that has 80 quote reserves and 5,000,000 token reserves, what does the price drop to after the trade and what do they walk away with? Use the default 100 bps fee.”
Agent auto-routing best-execution check
“My agent is about to route a sell of 250 tokens through a bonding curve with 25 quote reserves and 900,000 token reserves — compute the exact amount out and post-trade state so I can decide if this is worth executing at a 150 bps fee.”
Technical details
Endpoint
GEThttps://curvecall.onrender.com/v1/quote/sell?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to mathematically price a sell-side swap on a constant-product AMM or bonding curve without executing an on-chain transaction. It is ideal for pre-trade simulation, slippage estimation, agent-driven best-execution routing, or building trading UIs that need real-time quote math. Prefer it over on-chain calls when you want instant, cheap ($0.001 USDC), deterministic computation without gas costs or latency.
Side effects
- Missing required fields (amount_in, quote_reserves, token_reserves) returns a validation error
- Zero or negative reserve values may cause division-by-zero or nonsensical pricing
- amount_in larger than available token reserves may return invalid or extreme slippage values
- Service unavailable due to cold-start on Render free tier causing slow initial response
- Payment failure via x402 protocol blocks the call before computation occurs
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| input | object | |
| output | object |
Tags
x402
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