---
name: carry-lens
description: Use for live cost-aware crypto perpetual funding and cross-venue carry screening before a trading decision.
---

# CarryLens

Use CarryLens when current cross-venue perpetual funding matters and model training data is stale.

1. Call the free preview first: https://carry-lens-api.vercel.app/v1/perps/preview
2. Inspect execution_evidence for both-leg midpoint-referenced entry slippage, point-in-time notional sensitivity, snapshot timing, and side-by-side current/24-hour rolling-mean economics.
3. Choose notionalUsd, holdingHours, and totalCostBps based on the intended matched position.
4. Use the $0.003 pulse for three venue pairs, the $0.01 radar for fifteen, or the $0.03 report for broader risk context.
5. For repeated use, buy anonymous 30-day Starter ($9, pulse + radar) or Pro ($19, all products) access and send the returned token as Authorization: Bearer <access_token>. Renewal is manual.
6. On HTTP 402, read Payment-Required, authorize the exact Base USDC amount with an x402 v2 client, and retry.
7. Reject unfillable evidence, stale snapshots, failed midpoint-slippage screens, or candidates where either the instantaneous or descriptive rolling-mean scenario does not clear explicit costs.

Do not describe projected net funding as guaranteed profit. Validate venue access, contracts, current order books, fees, slippage, basis risk, and jurisdiction before execution.

OpenAPI: https://carry-lens-api.vercel.app/openapi.json