Endpoint · market dataGETx402.donnyautomation.com /optimism/slippage ?amountUsd=10000&pair=WETH%2FUSDC
What a trade size actually executes at on OP Mainnet, simulated against live reserves.
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What a trade size actually executes at on OP Mainnet, simulated against live reserves. Returns best (venue, amountOut, executionPrice, priceImpactBps, feeBps, totalCostBps), routingGain, venues[]. Requires ?pair=SYM/SYM AND ?amountUsd=25000 (or ?amountIn=). pair alone = 400 missing_amount. Errors: 400 bad_pair|missing_amount|bad_amount, 404 no_pools|no_quote|cannot_size_in_usd, 502 upstream_read_failed. Spot price without a size is /price. Chain-pinned; bare /slippage = BSC.Overview
Grade?
UNRATED
0 of 30 paid calls toward a letter
Price
$0.01 per call
Paid calls
none yet
delivery unknown until someone pays
More info
Seller?
URL
https://x402.donnyautomation.com/optimism/slippage?amountUsd=10000&pair=WETH%2FUSDC
Seen
first 35 days ago · last 5 days ago
59 free handshakes
Payment
Pays through
x402 · MPP evm
Offered on?
Base USDC
Listed on?
Base
Score, from free handshakes onlyweights 2026.09.6
UN
RATED
RATED
0.525 liveness verified, no letter
To a letter · 30 paid calls
0 of 30
Held down by liveness · gap to 1.000 is 0.475: 0.085 uncertain ? + 0.390 short ? · 0.125 to C
| Component | Weight | Measured | Lower bound ? | Adds | Short ? | Uncertain ? | |
|---|---|---|---|---|---|---|---|
| livenesscosts the most it answered at all |
0.60 | 0.68 | 0.541 | 0.325 | −0.190 | −0.085 | |
| latency p95 it answered as fast as its class |
0.20 | 0.00 | 0.000 | 0.000 | −0.200 | 0 | |
| price stability the price stayed where it was listed |
0.20 | 1.00 | 1.000 | 0.200 | 0 | 0 | |
| Composite | 1.00 | 0.525 | gap to 1.000 = 0.475 · 0.390 short · 0.085 uncertain | 0.525 | −0.390 | −0.085 |
Not measured: correctness · nobody paid; honesty · nobody paid; schema conformance · no answer had a published shape to check
The multiplication, written out
0.600 × 0.541 liveness
+ 0.200 × 0.000 latency p95
+ 0.200 × 1.000 price stability
= 0.525 → UNRATED: 57 of 30 paid calls weights 2026.09.6 · 57 samples · seed cap_01M1A59NENZR3ZG8Y9VJT0DBQ9|2026-08-31T22:29:13.297Z|2026.09.6
Verify it yourself
npx teppi-check https://x402.donnyautomation.com/optimism/slippage?amountUsd=10000&pair=WETH%2FUSDCcurl -s https://api.teppi.xyz/v1/trust/cap_01M1A59NENZR3ZG8Y9VJT0DBQ9