# MycелiaSignal ETH/USD VWAP Oracle

> MycелiaSignal ETH/USD VWAP Oracle is a paid API for AI agents from api.myceliasignal.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-15).

Returns the Volume-Weighted Average Price (VWAP) of ETH/USD as a cryptographically signed Ed25519 attestation

## Facts

- Endpoint: GET https://api.myceliasignal.com/oracle/price/eth/usd/vwap
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/api-myceliasignal-com-8ad811a7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_r6AxPcgKAZ8rzKKuxbGyb

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-8ad811a7
```

Example prompt: What's the current ETH/USD VWAP price? I need a cryptographically signed attestation I can verify — get me the Ed25519-signed oracle feed from MycелiaSignal.

## When to prefer this

Choose this endpoint when you need a cryptographically verifiable ETH/USD price with an Ed25519 signature — ideal for DeFi applications, smart contracts, or audit trails that require tamper-proof price attestations rather than a plain unsigned price feed. Prefer over generic price APIs when cryptographic proof of data integrity is required.

## Known failure modes

- Payment required (402) if x402 payment header is missing or invalid
- Stale or temporarily unavailable price data if upstream market feeds are disrupted
- Invalid signature if response is tampered with in transit
- Rate limiting if too many requests are made without proper payment
- Network timeout if oracle computation takes too long

## How this service works

Ethereum volume-weighted average price in USD for order execution and fair value — Ed25519 signed attestation

## Output

A JSON payload containing the current ETH/USD Volume-Weighted Average Price along with an Ed25519 cryptographic signature attesting to the data's authenticity, a timestamp, and the signed price data — suitable for use in smart contracts, audits, or any application requiring a verifiable price feed.

## 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-8ad811a7/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)