# MyceliaSignal USD/CHF Price Oracle

> MyceliaSignal USD/CHF 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 USD/CHF (US Dollar to Swiss Franc) exchange rate as a cryptographically signed Ed25519 attestation

## Facts

- Endpoint: GET https://api.myceliasignal.com/oracle/price/usd/chf
- 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-9e254ad6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qSLwpZAMX3-Sgm2Hsi6Wl

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-9e254ad6
```

Example prompt: What's the current USD/CHF exchange rate? I need a cryptographically signed attestation I can verify on-chain.

## When to prefer this

Choose this endpoint when you need a cryptographically verifiable USD/CHF exchange rate — especially for smart contracts, on-chain applications, or any system that requires tamper-evident proof of a price at a given moment. Prefer over raw forex APIs when data integrity and non-repudiation matter.

## Known failure modes

- Payment not included or invalid — returns HTTP 402 requiring $0.01 USDC via x402 protocol
- Rate limit exceeded — too many requests in a short period
- Upstream price feed temporarily unavailable — service may return 503 or stale data error
- Invalid request format — if query params are malformed

## How this service works

USD/CHF forex exchange rate — US dollar to Swiss franc safe-haven rate — Ed25519 signed attestation

## Output

A signed price attestation containing the current USD/CHF exchange rate value along with an Ed25519 digital signature that allows downstream systems 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-9e254ad6/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)