# Mycelia Signal BTC/USD Oracle Price

> Mycelia Signal BTC/USD Oracle Price 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) BTC/USD spot price from the Mycelia Signal price oracle

## Facts

- Endpoint: GET https://api.myceliasignal.com/oracle/price/btc/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/mycelia-signal-fe75af63
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ozP_aUaF5rmwia9r3KAI5

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 mycelia-signal-fe75af63
```

Example prompt: What's the current BTC/USD spot price with a cryptographic attestation I can verify — grab it from Mycelia Signal's oracle feed?

## When to prefer this

Use this endpoint when you need a cryptographically signed, verifiable BTC/USD spot price — especially for DeFi, smart contract, or audit contexts where price authenticity must be provable via Ed25519 signature. Prefer over unsigned REST price APIs when tamper-evidence matters. At $0.01/call it is cost-effective for frequent polling.

## Known failure modes

- Payment not provided or invalid x402 payment — returns 402 Payment Required
- Invalid or unsupported currency pair path — returns 404 Not Found
- Oracle data temporarily unavailable — returns 503 Service Unavailable
- Rate limit exceeded — returns 429 Too Many Requests

## How this service works

Example spot pair from docs (many /oracle/price/... routes; VWAP routes $0.02 per docs—discover paths via /sho/info)

## Output

Returns the current BTC/USD spot price along with an Ed25519 cryptographic signature attesting to the value, enabling downstream verification of price authenticity. Likely includes the price value, timestamp, and signature fields.

## 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/mycelia-signal-fe75af63/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)