# Otto AI Yield Markets — Aave V3 & Morpho APY Feed

> Otto AI Yield Markets — Aave V3 & Morpho APY Feed is a paid API for AI agents from x402.ottoai.services, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).

Returns live DeFi yield farming market data including APYs for Aave V3 and Morpho protocols on Base and Ethereum, enabling stablecoin deposit rate comparisons.

## Facts

- Endpoint: GET https://x402.ottoai.services/yield-markets
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-ottoai-services-ab0ae7e0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_vo2DqyGs-pvdU_KOmIDgQ

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-ottoai-services-ab0ae7e0
```

Example prompt: What are the current live APYs across Aave V3 and Morpho on both Base and Ethereum right now? I want to compare rates before deciding where to deposit my idle stablecoins.

## When to prefer this

Use this endpoint when an agent needs real-time, ready-to-compare APY data specifically from Aave V3 and Morpho on Base and Ethereum — it is narrower and more precise than the sibling 'Best DeFi yield opportunities' endpoint which covers ETH/BTC and adds risk ratings. Prefer this for stablecoin-focused yield comparisons where protocol-level granularity (Aave vs Morpho) matters.

## Known failure modes

- Protocol data unavailable: upstream Aave or Morpho subgraph may be temporarily down, returning partial or empty markets array
- Payment failure: x402 micropayment of $0.001 USDC not authorized, returns 402 Payment Required
- Rate limiting: excessive polling returns throttle error
- Empty response: no markets returned if provider indexing is lagging

## How this service works

DeFi yield farming markets with live APYs across Aave V3 and Morpho on Base, Ethereum, and other major chains. Find the best stablecoin yield (USDC) and ETH yield for idle capital: returns supply APY, TVL, and vault/market addresses per token, filterable by protocol, chain, or token symbol. Compare DeFi yield rates across lending markets and vaults before depositing.

## Output

Returns an array of yield markets with live APY data for Aave V3 and Morpho protocols across Base and Ethereum networks, including asset names, current rates, and protocol/chain metadata — useful for comparing where to deploy idle stablecoins.

## Example request

```json
{
 "input": {
  "type": "http",
  "method": "GET",
  "queryParams": {}
 }
}
```

## 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-ottoai-services-ab0ae7e0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.ottoai.services](https://www.zero.xyz/host/x402.ottoai.services/llms.txt)