# MyceliaSignal Best USDT Supply Yield Oracle

> MyceliaSignal Best USDT 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 USDT 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/usdt
- 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/myceliasignal-best-usdt-supply-yield-oracle-29b29dc0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_mIevZfGLIDpBaoRftOH4q

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 myceliasignal-best-usdt-supply-yield-oracle-29b29dc0
```

Example prompt: What's the best USDT supply yield available right now across all DeFi protocols and chains — and can you give me a signed attestation so I can trust the data?

## When to prefer this

Choose this endpoint when you need a single authoritative, cryptographically verifiable answer for the best USDT supply yield across all major DeFi protocols and chains simultaneously, rather than querying individual protocol APIs one by one. Especially valuable when trust and verifiability of the yield data matters, as the Ed25519 signed attestation allows downstream consumers to verify the data has not been tampered with. Use over generic DeFi aggregators when you need a machine-readable signed result suitable for automated on-chain or agent-based decision making.

## Known failure modes

- Service unavailable or timeout if upstream DeFi data sources are unreachable
- Payment failure if the $0.05 USDC x402 payment is not properly submitted
- Stale data if aggregated protocol sources have not updated recently
- No yield data available if all protocols report zero or invalid rates
- Rate limiting if too many requests are made in a short window

## How this service works

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

## Output

Returns the best current USDT supply yield (APY), identifying the optimal DeFi protocol and chain, along with an Ed25519 cryptographically signed attestation confirming the data's authenticity and integrity at time of retrieval.

## 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/myceliasignal-best-usdt-supply-yield-oracle-29b29dc0/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)