# Chat Completion – Llama 3.3 70B or GPT-OSS-120B (Large Model)

> Chat Completion – Llama 3.3 70B or GPT-OSS-120B (Large Model) is a paid API for AI agents from agent-data-tools.revmesh2074.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-22).

Runs a user prompt through a large open model (Llama 3.3 70B Instruct or GPT-OSS-120B) and returns the generated text response, with optional system prompt and temperature control.

## Facts

- Endpoint: GET https://agent-data-tools.revmesh2074.workers.dev/ai/chat-large?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-22
- Activations on Zero: 0
- Provider: agent-data-tools.revmesh2074.workers.dev
- Website: https://agent-data-tools.revmesh2074.workers.dev
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agent-data-tools-revmesh2074-workers-dev-chat-completion-llama-3-3-90fb64e8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_w_AwSObzFH1pkGlkvX23X

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 agent-data-tools-revmesh2074-workers-dev-chat-completion-llama-3-3-90fb64e8
```

Example prompt: Use the Llama 3.3 70B model to draft a detailed technical explanation of how transformer attention mechanisms work, aimed at a software engineer with no ML background — give it up to 800 tokens and keep the temperature at 0.5.

## When to prefer this

Prefer this endpoint over the smaller /ai/chat (8B model) when the task requires deep multi-step reasoning, long-form drafting, nuanced Q&A, or when the 8B model produces unsatisfactory results. Choose llama-3.3-70b for open-weight reproducibility or gpt-oss-120b for maximum capability. At $0.01/call it is 3× more expensive than the 8B endpoint, so reserve it for tasks where quality clearly matters.

## Known failure modes

- Prompt exceeds 8,000 characters — request rejected
- maxTokens out of 1–1024 range — validation error
- Invalid model enum value — error returned
- Prompt results in a policy refusal — empty or truncated response
- Payment not provided or insufficient credits — 402 response with no charge
- Temperature outside 0–1.5 range — error or clamped value

## How this service works

181 pay-per-call tools for AI agents over HTTP or MCP, most at $0.003. Every caller gets 25 free calls; then pay per call in USDC via x402 (Base, Polygon, Arbitrum, Monad, World Chain) or by card with prepaid credits from /credits. No account needed; failed calls are never charged; per-tool reliability is public at /status. Crypto: token prices and wallet portfolios from Uniswap v3, chain reads on Base, Ethereum, Arbitrum, Optimism and Polygon, OFAC sanctions screening. Web: Read public static documentation, pages, PDFs and RSS feeds as clean text, plus link previews and sitemaps. Business: company profiles, domain and email checks. Also Bitcoin, FX, weather, holidays, geocoding, AI text, and JSON, date and validation utilities.

## Output

A JSON object containing the model name used and the generated text response string (up to 1,024 tokens). The response field holds the full completion text produced by the selected large model.

## 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",
     "required": [
      "prompt"
     ],
     "properties": {
      "model": {
       "enum": [
        "llama-3.3-70b",
        "gpt-oss-120b"
       ],
       "type": "string",
       "examples": [
        "llama-3.3-70b"
       ],
       "description": "llama-3.3-70b (default) or gpt-oss-120b"
      },
      "prompt": {
       "type": "string",
       "examples": [
        "Explain x402 in one sentence."
       ],
       "description": "User prompt, up to 8,000 characters"
      },
      "system": {
       "type": "string",
       "examples": [
        "You are a concise assistant."
       ],
       "description": "Optional system prompt, up to 2,000 characters"
      },
      "maxTokens": {
       "type": "integer",
       "examples": [
        200
       ],
       "description": "Maximum output tokens, 1-1024 (default 400)"
      },
      "temperature": {
       "type": "number",
       "examples": [
        0.6
       ],
       "description": "0-1.5 (default 0.6)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "model": {
       "type": "string"
      },
      "response": {
       "type": "string"
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "model": "@cf/meta/llama-3.3-70b-instruct-fp8-fast",
  "response": "x402 lets software pay for an HTTP request with a stablecoin by answering a 402 Payment Required challenge."
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agent-data-tools-revmesh2074-workers-dev-chat-completion-llama-3-3-90fb64e8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agent-data-tools.revmesh2074.workers.dev](https://www.zero.xyz/host/agent-data-tools.revmesh2074.workers.dev/llms.txt)