# Mycelia Signal BTC/USD VWAP Oracle

> Mycelia Signal BTC/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 2026-09-13).

Returns a cryptographically signed (Ed25519) Volume-Weighted Average Price attestation for BTC/USD

## Facts

- Endpoint: GET https://api.myceliasignal.com/oracle/price/btc/usd/vwap
- Price: $0.02/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-6c854f70
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_-gnIJwg_OSkOL7jAX5lDc

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-6c854f70
```

Example prompt: What's the current volume-weighted average price of Bitcoin in USD right now? I need a cryptographically signed attestation I can trust.

## When to prefer this

Choose this endpoint when you need a cryptographically attested, tamper-evident BTC/USD price — particularly for smart contracts, DeFi protocols, or any use case requiring verifiable price provenance. The Ed25519 signature makes it superior to unsigned feeds when auditability or on-chain verification matters.

## Known failure modes

- Payment not provided or invalid (402 Payment Required)
- Upstream price feed unavailable or stale (503 Service Unavailable)
- Signature verification failure on consumer side if public key is outdated
- Rate limiting if too many requests in short window (429 Too Many Requests)

## How this service works

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

## Output

Returns a signed JSON payload containing the BTC/USD VWAP price, a timestamp, and an Ed25519 digital signature that allows consumers to verify the data's authenticity and integrity without trusting the transport layer.

## 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-6c854f70/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)