# Mycelia Signal BTC/EUR Spot Price Oracle

> Mycelia Signal BTC/EUR 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 Bitcoin to Euro spot price as an Ed25519-signed cryptographic attestation

## Facts

- Endpoint: GET https://api.myceliasignal.com/oracle/price/btc/eur
- 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-96bb07a6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_1MkrgipX1GenC7lLxQWaH

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-96bb07a6
```

Example prompt: What's the current Bitcoin price in euros? I need a cryptographically signed attestation I can verify.

## When to prefer this

Use this endpoint when you need a cryptographically verifiable BTC/EUR price — particularly for smart contracts, DeFi protocols, or audit trails where tamper-proof signed attestations are required. Prefer this over unsigned price APIs when trust and verifiability are critical. Choose this specifically for EUR-denominated bitcoin pricing rather than USD-denominated alternatives.

## Known failure modes

- Price feed unavailable if upstream exchange data source is down
- Invalid or expired signature if the oracle signing key rotates
- HTTP 402 Payment Required if the x402 micropayment of $0.01 USDC is not included
- Rate limiting or access denial if too many requests are made in a short window

## How this service works

Real-time Bitcoin price in EUR, multi-exchange aggregated oracle for European markets — Ed25519 signed attestation

## Output

Returns the current BTC/EUR spot price wrapped in an Ed25519-signed attestation, allowing consumers to cryptographically verify the authenticity and integrity of the price data. Includes the price value, a timestamp, and the oracle's digital signature.

## 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-96bb07a6/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)