# Stack Facts LLM Model Pricing Lookup

> Stack Facts LLM Model Pricing Lookup is a paid API for AI agents from g5joilnmeep4ntz3nwezxt5dmu.srv.us, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-13).

Returns structured pricing, capabilities, and metadata for a specific LLM model by provider and model name, with a cryptographically signed response paid per-call in USDC.

## Facts

- Endpoint: GET https://g5joilnmeep4ntz3nwezxt5dmu.srv.us/v1/models/%7Bprovider%7D/%7Bmodel%7D?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/stack-facts-llm-model-pricing-lookup-8b5d2df8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_svGE82m-fMnhJprx9t8sH

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 stack-facts-llm-model-pricing-lookup-8b5d2df8
```

Example prompt: What are the current input and output token prices for OpenAI's GPT-4o, and does it support vision and tool calls?

## When to prefer this

Choose this endpoint when you need authoritative, signed, up-to-date LLM pricing and capability data without creating an account or managing API keys. Ideal for AI agents that need to dynamically look up model costs before routing requests, compare models programmatically, or verify model capabilities (vision, tool calls, reasoning). Prefer this over scraping provider docs or using LiteLLM's local config when you need a trustless, cryptographically verifiable answer with clear provenance and pay-per-call economics.

## Known failure modes

- Unknown provider or model name returns 404 or empty data
- Payment failure (insufficient USDC balance) returns 402 before serving data
- Stale data flag set to true if dataset hasn't been refreshed recently
- sources_disagree field populated when LiteLL and models.dev differ on pricing
- Signature verification failure if response is tampered in transit

## How this service works

Check a package before install: malware, known vulnerabilities (OSV), exploited CVEs (CISA KEV) and end-of-life, plus LLM prices; signed answers, pay per call in USDC, no account or API key.

## Output

A signed JSON object containing the model's full metadata: input/output/cache pricing in USD per million tokens, context window, max output tokens, supported modalities (text, vision), tool call support, reasoning flag, release and deprecation dates, knowledge cutoff, aliases, and source agreement flags. Also includes a meta block with snapshot ID, SHA256 hash, cryptographic signature, dataset license, and staleness indicator.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "data": {
   "id": "openai/gpt-4o",
   "mode": "chat",
   "name": "GPT-4o",
   "model": "gpt-4o",
   "status": null,
   "vision": true,
   "aliases": [],
   "sources": {
    "litellm": true,
    "modelsdev": true
   },
   "provider": "openai",
   "reasoning": false,
   "tool_call": true,
   "deprecated": false,
   "release_date": "2024-05-13",
   "context_tokens": 128000,
   "deprecation_date": null,
   "input_modalities": [
    "text"
   ],
   "knowledge_cutoff": "2023-09",
   "sources_disagree": [
    "input_usd_per_mtok"
   ],
   "max_output_tokens": 16384,
   "output_modalities": [
    "text"
   ],
   "input_usd_per_mtok": 2,
   "output_usd_per_mtok": 10,
   "days_until_deprecation": null,
   "cache_read_usd_per_mtok": 1.25,
   "cache_write_usd_per_mtok": null
  },
  "meta": {
   "as_of": "2026-10-09T06:00:00Z",
   "stale": false,
   "key_id": "sf-test-1",
   "notice": "Normalised (modified) from the …",
   "sha256": "f99d55c9aa420561de698d63d70d916…",
   "source": "https://raw.githubusercontent.c…",
   "dataset": "models",
   "licence": "MIT",
   "signature": "AvlI5FXM8fD9oncZAr9velQseOBO9X7…",
   "attribution": "Pricing data derived from LiteL…",
   "snapshot_id": "models-20261009T060000Z-f99d55c9",
   "manifest_url": "/v1/models/manifest",
   "retrieved_at": "2026-10-09T06:00:00.000Z"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/stack-facts-llm-model-pricing-lookup-8b5d2df8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from g5joilnmeep4ntz3nwezxt5dmu.srv.us](https://www.zero.xyz/host/g5joilnmeep4ntz3nwezxt5dmu.srv.us/llms.txt)