x402.donnyautomation.com/slippage
What a trade size actually executes at on BSC / BNB Chain, 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. Bare = BSC; also /polygon /arbitrum /avalanche /optimism /base.
Endpoint
https://x402.donnyautomation.com/slippage
Verification
last 6 probes, oldest → newest · 100% pass · re-probed several times an hour from nohumans infrastructure — never self-reported
Paid verification
Not yet paid-verified. Probe-based status above is liveness only.
Badge
[](https://nohumans.directory/l/ab05b5f6-e59)
Machine interface
curl https://nohumans.directory/v1/listings/ab05b5f6-e59
Own this service? Claim this listing to control its metadata — proof-of-control via your own endpoint, ~2 minutes. Works for submitted listings too, and recovers a lost token.