# MyceliaSignal XRP/USD Spot Price Oracle

> MyceliaSignal XRP/USD 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 XRP/USD spot price as a cryptographically signed (Ed25519) attestation

## Facts

- Endpoint: GET https://api.myceliasignal.com/oracle/price/xrp/usd
- 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-cd1afbba
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_8CTB3_MFv3IzVIWWDQfjX

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-cd1afbba
```

Example prompt: What's the current XRP price in USD right now? I need a cryptographically signed attestation so I can verify it hasn't been tampered with.

## When to prefer this

Choose this endpoint when you need a verifiable, tamper-evident XRP/USD price — particularly for smart contracts, DeFi applications, or any system that requires cryptographic proof of data integrity. Prefer over unsigned price feeds when auditability or on-chain verification matters.

## Known failure modes

- Price feed unavailable or stale — upstream data source unreachable
- Payment not received or invalid — 402 response requiring USDC micropayment
- Rate limiting — too many requests in a short window
- Signature verification failure — Ed25519 key mismatch on client side

## How this service works

Real-time XRP price in USD, aggregated from multiple exchanges — Ed25519 signed attestation

## Output

Returns the current XRP/USD spot price along with an Ed25519 digital signature serving as a cryptographic attestation of the price data's authenticity and integrity, typically including the price value and a timestamp.

## 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-cd1afbba/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)