# Otto DeFi Yield Markets - Aave V3 & Morpho APY Feed

> Otto DeFi Yield Markets - Aave V3 & Morpho APY Feed is a paid API for AI agents from x402-trading.useotto.xyz, paid per call via x402, $0.001000/call, status unknown (last checked 2026-09-15).

Returns live yield farming APYs across Aave V3 and Morpho protocols on Base and Ethereum networks for stablecoin deposit comparison

## Facts

- Endpoint: GET https://x402-trading.useotto.xyz/yield-markets
- Price: $0.001000/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-trading-useotto-xyz-ed261287
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_rqsN8SfXGMl4F_COmJy3b

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

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability x402-trading-useotto-xyz-ed261287
```

Example prompt: Show me all the live stablecoin yield markets on Aave V3 and Morpho across Base and Ethereum so I can decide where to park my idle USDC for the best APY.

## When to prefer this

Choose this endpoint when you need live, aggregated DeFi yield rates specifically from Aave V3 and Morpho on Base and Ethereum in a single call, rather than querying each protocol individually. Ideal for stablecoin treasury management, yield optimization workflows, or pre-deposit rate comparisons.

## Known failure modes

- Upstream protocol data unavailable: returns degraded or empty markets array
- Payment not processed (x402 flow failure): 402 Payment Required response
- Rate limit exceeded: HTTP 429 Too Many Requests
- Downstream RPC node issues causing stale or missing APY data

## How this service works

DeFi yield farming markets with live APYs across Aave V3 and Morpho on Base and Ethereum. Compare rates before depositing idle stablecoins.

## Output

A list of yield markets with current APY rates, protocol names (Aave V3 or Morpho), supported chains (Base or Ethereum), and asset details — enabling direct comparison before making a deposit decision.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "status": {
       "type": "string"
      },
      "markets": {
       "type": "array"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-trading-useotto-xyz-ed261287/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-trading.useotto.xyz](https://www.zero.xyz/host/x402-trading.useotto.xyz/llms.txt)