# MycелiaSignal WETH Best Supply Yield Oracle

> MycелiaSignal WETH Best Supply Yield Oracle is a paid API for AI agents from api.myceliasignal.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-13).

Returns the best current WETH supply yield rate across all DeFi protocols and chains, delivered as an Ed25519-signed attestation

## Facts

- Endpoint: GET https://api.myceliasignal.com/oracle/defi/yield/best/weth
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/myc-iasignal-weth-best-supply-yield-oracle-cd56bb71
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_nyxo3OGhW_rUH0JE12akv

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 myc-iasignal-weth-best-supply-yield-oracle-cd56bb71
```

Example prompt: What's the best WETH supply yield available right now across all DeFi protocols and chains — I want to know which protocol and chain to deposit on and the current APY, and I need it cryptographically signed so I can trust it.

## When to prefer this

Use this endpoint when you need a single authoritative, cryptographically attested answer for the best WETH supply yield across all major DeFi protocols and chains simultaneously, rather than querying each protocol API individually. Ideal for agents making yield-optimization decisions that require tamper-evident data provenance via Ed25519 signatures.

## Known failure modes

- No yield data available for WETH if protocols are unreachable or indexing is stale
- Signature verification failure if the Ed25519 key is rotated
- HTTP 402 if payment is not submitted or USDC balance is insufficient
- Rate limiting or timeout if underlying protocol data sources are slow

## How this service works

Best WETH supply yield across all protocols and chains — Ed25519 signed attestation

## Output

Returns a signed payload containing the top WETH supply yield opportunity: the best APY found, the protocol name (e.g. Aave, Compound, Morpho), the chain it's on, and an Ed25519 cryptographic signature attesting to the authenticity of the data.

## 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"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/myc-iasignal-weth-best-supply-yield-oracle-cd56bb71/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.myceliasignal.com](https://www.zero.xyz/host/api.myceliasignal.com/llms.txt)