# MycелiaSignal LLM Price Oracle — Cheapest Provider by Tier

> MycелiaSignal LLM Price Oracle — Cheapest Provider by Tier is a paid API for AI agents from api.myceliasignal.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).

Returns the cheapest LLM provider and pricing for each tier (frontier, efficient, fast, reasoning) across all major providers, with an Ed25519-signed attestation

## Facts

- Endpoint: GET https://api.myceliasignal.com/oracle/inference/compare
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/myc-iasignal-llm-price-oracle-cheapest-provider-by-tier-b03aafc7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_RJ7V0ATNnonCsaWu-tR7E

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 myc-iasignal-llm-price-oracle-cheapest-provider-by-tier-b03aafc7
```

Example prompt: Which LLM provider is currently the cheapest for each tier — frontier, efficient, fast, and reasoning — and can you give me a signed attestation I can verify?

## When to prefer this

Use this endpoint when you need a cryptographically verifiable, cross-provider LLM pricing comparison sorted by cost tier. Ideal for agents or smart contracts making cost-optimized inference routing decisions, cost auditing workflows, or any context where tamper-evident proof of pricing data is required. Prefer this over manual price checks or non-attested sources when on-chain or trustless verification matters.

## Known failure modes

- Payment not received or invalid — 402 response returned
- Provider data temporarily unavailable — partial or stale tier data
- Ed25519 signing failure — attestation cannot be generated
- Network timeout from upstream provider aggregation
- Invalid query parameters — 400 error

## How this service works

Cheapest LLM per tier (frontier/efficient/fast/reasoning) across all providers — Ed25519 signed attestation

## Output

A structured comparison of the cheapest LLM provider and associated pricing for each tier (frontier, efficient, fast, reasoning) across all major providers, accompanied by an Ed25519 cryptographic signature for trustless verification of the data's authenticity and freshness.

## 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/myc-iasignal-llm-price-oracle-cheapest-provider-by-tier-b03aafc7/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)