# MyceliaSignal USDT/USD Peg Oracle

> MyceliaSignal USDT/USD Peg Oracle is a paid API for AI agents from api.myceliasignal.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-16).

Returns a cryptographically signed (Ed25519) attestation of the current USDT/USD peg price

## Facts

- Endpoint: GET https://api.myceliasignal.com/oracle/price/usdt/usd
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/api-myceliasignal-com-a646f1c5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_SrWLfqoVzV4h8LFwsYRt5

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 api-myceliasignal-com-a646f1c5
```

Example prompt: Can you pull a signed oracle attestation for the current USDT/USD peg price — I need the Ed25519-signed result to verify on-chain that USDT is still holding its dollar peg?

## When to prefer this

Prefer this endpoint when you need a cryptographically verifiable, tamper-proof price attestation for USDT/USD — especially for smart contract integration, DeFi protocols, or any use case requiring on-chain proof of the stablecoin peg. It is distinct from generic price APIs because the Ed25519 signature allows trustless verification of the data's origin and integrity.

## Known failure modes

- Payment failure: x402 payment of $0.01 USDC not completed or invalid
- Rate limit exceeded: too many requests from the same client
- Service unavailability: price feed source temporarily offline
- Invalid signature: Ed25519 attestation cannot be verified
- Stale data: price feed delayed or not updated in time

## How this service works

USDT stablecoin peg monitor — real-time Tether deviation from $1.00 USD — Ed25519 signed attestation

## Output

A signed attestation containing the current USDT/USD price (expected near 1.0000) along with an Ed25519 cryptographic signature that can be used to verify the data's authenticity and integrity on-chain or in smart contracts.

## 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"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/api-myceliasignal-com-a646f1c5/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)