# YieldSignal WETH Base Lending APY

> YieldSignal WETH Base Lending APY is a paid API for AI agents from yieldsignal.vercel.app, paid per call via x402, $0.1/call, status unknown (last checked 2026-10-30).

Returns real-time risk-weighted WETH lending APY across major Base DeFi protocols (Aave, Compound, Morpho, Moonwell, Euler, Fluid) with source attribution and EIP-712 signed response.

## Facts

- Endpoint: GET https://yieldsignal.vercel.app/signal/weth-base-yield?utm_source=zero.xyz
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/yieldsignal-weth-base-lending-apy-ff6c1204
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_a0RWTJFaqiWI3JODWLWOZ

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 yieldsignal-weth-base-lending-apy-ff6c1204
```

Example prompt: What's the best risk-weighted APY I can get lending WETH on Base right now — show me rates from Aave, Compound, Morpho, Moonwell, Euler, and Fluid with which source each reading came from?

## When to prefer this

Choose this endpoint when you need real-time, cryptographically signed WETH lending APY data across multiple Base DeFi protocols in a single call, with per-protocol source attribution proving estimates were never used. Prefer over manual protocol checks or generic DeFi aggregators when auditability, signing provenance, and risk-weighted comparison across 6+ protocols is required.

## Known failure modes

- Onchain RPC unavailable — may return partial results or error for Aave/Compound/Morpho reads
- DefiLlama API unavailable — may return partial results or error for Moonwell/Euler/Fluid
- Payment not processed — 402 response requiring x402 USDC payment before data is returned
- Invalid or missing payment header — request rejected
- Protocol temporarily paused or data stale — source tag may indicate staleness

## How this service works

Real-time risk-weighted WETH lending APY on Base: Aave/Compound/Morpho read onchain, Moonwell/Euler/Fluid via DefiLlama, source tagged per reading (never estimated). EIP-712 signed by the payment-receiving address (see X-Signal-* headers), which also holds an ERC-8004 identity and attests readings on-chain via EAS. Verified per-asset accuracy is free at /accuracy.json; raw on-chain attestations at /track-record.

## Output

A JSON payload containing risk-weighted WETH lending APYs for each supported Base protocol (Aave, Compound, Morpho, Moonwell, Euler, Fluid), each tagged with its data source (onchain or DefiLlama). Response headers include EIP-712 typed data signature (X-Signal-Signature), signer address (X-Signal-Signer), and raw EIP-712 payload (X-Signal-Eip712-Payload) for cryptographic verification.

## Request schema (JSON Schema)

```json
{
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/yieldsignal-weth-base-lending-apy-ff6c1204/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from yieldsignal.vercel.app](https://www.zero.xyz/host/yieldsignal.vercel.app/llms.txt)