# Services from api.usenami.io on Zero

> api.usenami.io serves 30 paid API services for AI agents, indexed by Zero. Each is callable per call with payment handled by Zero.

Canonical page: https://www.zero.xyz/host/api.usenami.io
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/api.usenami.io/health.json

## Services

- [Nami Multi-Venue Slippage Scanner](https://www.zero.xyz/c/api-usenami-io-c448e142/llms.txt): $0.005/call via x402. Scans all supported venues for a given ticker and returns slippage estimates at $1K/$5K/$10K notional sizes, sorted by lowest slippage, with BBO and depth data.
- [Nami Top-of-Book for Venue/Symbol](https://www.zero.xyz/c/api-usenami-io-096ceca0/llms.txt): $0.001000/call via x402. Returns the current best bid and ask prices and sizes (top-of-book) for a specific trading venue and symbol
- [Nami Sized-Depth Quote: Hyperliquid BTC Orderbook](https://www.zero.xyz/c/api-usenami-io-a123ce8a/llms.txt): $0.01/call via x402. Returns best bid/ask plus precomputed slippage at $1K, $5K, and $10K notional for BTC on Hyperliquid
- [Nami Historical Funding Rates](https://www.zero.xyz/c/api-usenami-io-bf07436d/llms.txt): $0.005/call via x402. Returns historical per-venue perpetual funding rates for a ticker with 1h/4h/1d aggregations over 30-90 day windows
- [Nami Volume-Weighted Average Funding Rate](https://www.zero.xyz/c/api-usenami-io-06334a45/llms.txt): $0.003/call via x402. Returns the volume-weighted average perpetual funding rate across all venues for a given ticker, weighting each venue's rate by its market share.
- [Nami Cross-Venue Funding Rate Spread](https://www.zero.xyz/c/api-usenami-io-98468231/llms.txt): $0.001000/call via x402. Returns the highest and lowest funding rate venues for a given perpetual ticker, along with the spread in basis points across all tracked venues
- [Nami Sized-Depth Quote: Best Bid/Ask + Slippage Tiers for Binance BTC](https://www.zero.xyz/c/nami-sized-depth-quote-best-bid-ask-slippage-tiers-for-binance-btc-bb40a6a9/llms.txt): $0.01/call via x402. Returns best bid/ask prices plus precomputed slippage costs at $1K, $5K, and $10K notional for BTC on Binance via a sized-depth orderbook aggregate.
- [Usenami Perp Basis](https://www.zero.xyz/c/usenami-perp-basis-77b5d472/llms.txt): $0.005/call via x402. Returns per-venue perpetual futures basis (mark vs index price, basis_bps) and contango/backwardation structure for a given ticker
- [Nami OI Delta — Open Interest Change Signal](https://www.zero.xyz/c/api-usenami-io-6a38e65d/llms.txt): $0.003000/call via x402. Returns the change in open interest for a given ticker and venue between now and N hours ago, serving as an accumulation/distribution signal.
- [Nami Perpetuals Volume Anomaly Scanner](https://www.zero.xyz/c/api-usenami-io-b21c4c7c/llms.txt): $0.003/call via x402. Scans perpetual futures tickers for volume spikes where 24h rolling volume exceeds a multiplier times the baseline historical average over a lookback window.
- [Nami Current Funding Rates](https://www.zero.xyz/c/api-usenami-io-c0859744/llms.txt): $0.001/call via x402. Returns current per-venue perpetual funding rates for a given symbol or all symbols across HIP-3 DEX venues
- [Nami Cross-Venue Funding Rate Spread Snapshot](https://www.zero.xyz/c/api-usenami-io-156705da/llms.txt): $0.001000/call via x402. Returns a point-in-time snapshot of the funding rate spread for a symbol across all tracked perpetual venues, showing the highest and lowest rate venues and the spread in basis points.
- [Nami Aggregated Order Book (Best Bid/Ask)](https://www.zero.xyz/c/api-usenami-io-460380c5/llms.txt): $0.002/call via x402. Returns the best bid and best ask prices aggregated across all perpetual trading venues for a given symbol
- [Usenami Perp Snapshot](https://www.zero.xyz/c/usenami-perp-snapshot-86f9405f/llms.txt): $0.005/call via x402. Returns a one-call bundled market snapshot for a single perpetual futures venue/ticker, including funding rate, annualized carry, structure, open interest, 24h volume, and mark price.
- [Nami Open Interest per Venue and Ticker](https://www.zero.xyz/c/api-usenami-io-2fe68dad/llms.txt): $0.001000/call via x402. Returns open interest for a given perpetual ticker broken down by venue, including raw value and mark price with units noted per venue.
- [Nami Funding Arbitrage Signal](https://www.zero.xyz/c/nami-funding-arbitrage-signal-9e09de4f/llms.txt): $0.005/call via x402. Returns a ranked, decision-ready funding arbitrage signal showing gross spread net of round-trip taker fees, periods-to-breakeven, and depth-sized max notional across venues for perpetual futures.
- [Usenami Perpetual Funding Carry](https://www.zero.xyz/c/usenami-perpetual-funding-carry-025cb33a/llms.txt): $0.005/call via x402. Returns per-venue funding rate, annualized carry percentage, and contango/backwardation structure for a given perpetual futures ticker
- [Nami Top-of-Book Order Book API](https://www.zero.xyz/c/nami-top-of-book-order-book-api-a6964273/llms.txt): $0.001/call via x402. Returns the top-of-book (best bid/ask) for a specific trading venue and symbol
- [Nami OI History — Perpetual Open Interest Timeseries](https://www.zero.xyz/c/api-usenami-io-84440de9/llms.txt): $0.005/call via x402. Returns historical open interest timeseries data (1h/4h/1d resolution) for a given perpetual futures ticker and venue, covering up to a 30–90 day window.
- [Nami Perp 24h Rolling Volume by Venue](https://www.zero.xyz/c/api-usenami-io-47987c47/llms.txt): $0.001000/call via x402. Returns the 24-hour rolling trading volume in USD for each venue and ticker across RWA perpetual markets.
- [Nami Cross-Venue Funding Rate Arbitrage Scanner](https://www.zero.xyz/c/api-usenami-io-ee06e5d1/llms.txt): $0.003/call via x402. Scans perpetual futures tickers across all venues and returns those where the spread between maximum and minimum funding rates exceeds a specified threshold.
- [Nami Funding Rate Flip Detector](https://www.zero.xyz/c/api-usenami-io-db94d2cd/llms.txt): $0.003/call via x402. Detects positive-to-negative and negative-to-positive funding rate sign changes across perpetual futures venues over a configurable lookback window, distinguishing sustained from transient inversions.
- [Nami Best Execution Endpoint](https://www.zero.xyz/c/api-usenami-io-7086615a/llms.txt): $0.01/call via x402. Returns the single venue with the lowest precomputed slippage for a given order size, providing a naive best-execution baseline across venues.
- [Nami Multi-Venue Greedy Execution Router](https://www.zero.xyz/c/api-usenami-io-07c2b45c/llms.txt): $0.01/call via x402. Walks crypto venues in ascending slippage order, allocating up to per-venue depth caps until a target USD size is filled, returning the optimal route, total filled, and blended slippage (fees excluded).
- [Nami Perp Oracle Family Classifier](https://www.zero.xyz/c/api-usenami-io-f737716e/llms.txt): $0.001/call via x402. Returns oracle price-source family classification for 30+ perpetual futures venues, enabling basis-risk awareness for cross-venue strategies
- [Nami Perpetual Funding Next Payment ETA & Rate](https://www.zero.xyz/c/api-usenami-io-0a42a0cf/llms.txt): $0.003000/call via x402. Returns the next funding payment timestamp (ETA) and predicted funding rate for a specific ticker/venue pair on perpetual futures markets.
- [Nami Backtest Data Feed](https://www.zero.xyz/c/api-usenami-io-7520e6e2/llms.txt): $0.050000/call via x402. Returns a packaged time-series backtest feed combining funding rate history and optional orderbook snapshots, bucketed at 1h, 4h, or 1d granularity for crypto derivatives research.
- [Nami Cross-Venue Mark-Price Spread Scanner](https://www.zero.xyz/c/api-usenami-io-19f363d4/llms.txt): $0.003000/call via x402. Scans perpetual futures mark-prices across multiple venues to identify cross-venue price spreads for a given ticker, excluding fees, slippage, and funding differentials.
- [Nami Perp Volume History](https://www.zero.xyz/c/api-usenami-io-074a4f5a/llms.txt): $0.005/call via x402. Returns historical 24-hour trading volume timeseries (1h, 4h, or 1d granularity) for a perpetual futures ticker/venue pair over a 30–90 day window.
- [Nami RWA Perpetual Coverage](https://www.zero.xyz/c/api-usenami-io-6ba3cf4a/llms.txt): $0.001000/call via x402. Returns which HIP-3 decentralized exchanges offer perpetual coverage for real-world assets including stocks, metals, forex, commodities, and pre-IPO synthetics

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

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