# Mycelia Signal ETH/JPY Spot Price Oracle

> Mycelia Signal ETH/JPY Spot Price Oracle is a paid API for AI agents from api.myceliasignal.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-13).

Returns the current ETH/JPY spot price as an Ed25519-signed cryptographic attestation

## Facts

- Endpoint: GET https://api.myceliasignal.com/oracle/price/eth/jpy
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/api-myceliasignal-com-8e9e0891
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_8LlXVC4OCBjUjS_8bFMRT

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-8e9e0891
```

Example prompt: What's the current ETH/JPY spot price? I need a cryptographically signed attestation I can verify on-chain.

## When to prefer this

Choose this endpoint when you need a cryptographically verifiable ETH/JPY price with an Ed25519 signature for use in smart contracts, DeFi protocols, or any system requiring tamper-proof price attestation. Prefer over generic price APIs when the consumer needs to independently verify the data source's authenticity or integrate with on-chain oracle systems.

## Known failure modes

- Price feed temporarily unavailable (503 Service Unavailable)
- Payment not provided or insufficient (402 Payment Required — must pay $0.01 USDC via x402 protocol)
- Invalid or expired payment (402 with payment error details)
- Rate limit exceeded (429 Too Many Requests)
- Network or upstream data source outage leading to stale or missing price data

## How this service works

Real-time Ethereum price in JPY, multi-exchange aggregated oracle for Japanese markets — Ed25519 signed attestation

## Output

A JSON response containing the current ETH/JPY spot price along with an Ed25519 digital signature attesting to its authenticity, enabling trustless verification of the price data by any party with the public key.

## 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-8e9e0891/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)