---
title: "Rank up to 10 stablecoin/yield options by projected return over a horizon at each stated APY."
method: POST
path: "/v1/crypto/yield-compare"
tags: ["Crypto & DeFi"]
---

# Rank up to 10 stablecoin/yield options by projected return over a horizon at each stated APY.

`POST /v1/crypto/yield-compare`

## Request

- Base URL: `` (relative, and it does not resolve against the document’s source URL)
- URL: `/v1/crypto/yield-compare`
- Auth: none declared

Rank up to 10 stablecoin/yield options by projected return over a horizon at each stated APY.

Payment: x402 ($0.05 USDC on eip155:8453). Call unpaid to receive an HTTP 402 with requirements, then retry with the PAYMENT-SIGNATURE header. Method: projectedValue = principal*(1+apy)^years per option; ranked descending; spread = best - worst interest

## Request body

- object
  - `principalUsd` number, required
  - `years` number
  - `options` object[], required
    - `name` string
    - `apyPct` number, required

## Response `200`

Verified result + provenance (formula, sources, reproducible SHA-256 hash).

## Other responses

- `400`: Invalid input (no charge) — body echoes the JSON Schema.
- `402`: Payment required — PAYMENT-REQUIRED header carries the x402 accepts[] quote.

---

[API](https://skmtc.dev/x402toll/apis/tollbooth-verified-calculators-for-ai-agents.md) · [All operations](https://skmtc.dev/x402toll/apis/tollbooth-verified-calculators-for-ai-agents/llms.txt) · [OpenAPI document](https://skmtc.dev/x402toll/apis/tollbooth-verified-calculators-for-ai-agents/revisions/60cb70a3e1a5?raw)