# Mycelia Signal ADA/USD Spot Price Oracle

> Mycelia Signal ADA/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 2026-09-15).

Returns the current ADA/USD spot price as a cryptographically signed (Ed25519) attestation

## Facts

- Endpoint: GET https://api.myceliasignal.com/oracle/price/ada/usd
- Price: $0.01/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-860a5c2b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_SwXlR98F1lkw9gKTRuPcQ

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-860a5c2b
```

Example prompt: What's the current ADA/USD spot price? I need a cryptographically signed attestation I can verify — grab it from the Mycelia Signal oracle.

## When to prefer this

Use this endpoint when you need a cryptographically verifiable (Ed25519-attested) ADA/USD spot price, particularly for smart contract inputs, on-chain verification, or any use case requiring tamper-evident price data. Prefer this over unattested price feeds when provenance and integrity guarantees matter.

## Known failure modes

- Payment not provided or invalid — 402 Payment Required
- Oracle data temporarily unavailable — 503 or empty response
- Signature verification failure — malformed or tampered attestation
- Rate limiting if too many requests in a short window
- Network timeout from upstream price source

## How this service works

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

## Output

Returns the current ADA/USD spot price as an Ed25519-signed oracle attestation, allowing downstream consumers to cryptographically verify the authenticity and integrity of the price data.

## 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-860a5c2b/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)