# MyceliaSignal RTX 4090 Best Price Oracle

> MyceliaSignal RTX 4090 Best Price Oracle is a paid API for AI agents from api.myceliasignal.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).

Returns the best available RTX 4090 GPU price across all sources, delivered as an Ed25519-signed cryptographic attestation

## Facts

- Endpoint: GET https://api.myceliasignal.com/oracle/compute/best/rtx_4090
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/myceliasignal-rtx-4090-best-price-oracle-eee7bdf6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_iyD1V_-8K_qup2BS0GG4-

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 myceliasignal-rtx-4090-best-price-oracle-eee7bdf6
```

Example prompt: What's the best available price for an RTX 4090 right now, and can you give me a signed attestation proving that price is accurate?

## When to prefer this

Use this endpoint when you need a trustworthy, cryptographically signed best-price reference for RTX 4090 GPUs — particularly useful for automated procurement agents, cost-comparison workflows, or any system that requires tamper-evident proof of a price claim rather than just a raw number from an unverified scrape.

## Known failure modes

- Price data unavailable or stale — sources may be temporarily unreachable
- Invalid or expired Ed25519 signature — attestation integrity failure
- HTTP 402 Payment Required if USDC payment not included
- Rate limiting or quota exceeded
- No price data found across all sources

## How this service works

Cheapest RTX 4090 GPU rental — best hourly rate for cost-efficient AI inference and fine-tuning — Ed25519 signed attestation

## Output

A JSON response containing the lowest current RTX 4090 price found across all tracked sources, along with the source name and an Ed25519 cryptographic signature attesting to the authenticity and integrity of the price data.

## 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/myceliasignal-rtx-4090-best-price-oracle-eee7bdf6/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)