Vellium & Co

Directory › DeFi markets (yields, perps, funding) › Perp order book

Perp order book

The live level-2 order book for one perpetual: best bid and ask, mid, spread in basis points, up to 20 levels a side with cumulative depth and bid/ask imbalance. Use it when an agent is sizing an order, checking liquidity before a trade or

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Our latest check (2026-10-11)

Answering
Yes — valid x402 payment terms
Time to answer
182 ms
Price
$0.002 per call
Paying buyers, last 30 days
3 (directory's own records)
Paid calls, last 30 days
3
Category
DeFi markets (yields, perps, funding)
Address
https://agent402.tools/api/perp-orderbook

Accuracy: paid answers checked against an independent record

Not yet in our paid checks. A seller we have not checked has neither passed nor failed.

For agents

This page as JSON: /sellers/8f28564fabd3.json. Paid lookup by address: GET /api/seller?resource=… ($0.001, x402).

Sellers can see the evidence behind their checks and ask for a re-check at [email protected].