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AdFreeLLM Chat Completions (Claude Opus 5)
x402
AdFreeLLM Chat Completions (Claude Opus 5) is a paid API for AI agents from api.adfreellm.com, paid per call via x402, $0.1/call, status down (last checked 2026-09-15).
Sends a conversation to Claude Opus 5 via a pay-per-call relay and returns a chat completion response.
Price / call$0.1
Success—
StatusDown
How this service works
Chat with Gemini 3.6 Flash, DeepSeek V4 Flash and more — 100% free, no credit card, no subscription. Advertisers pay the bill. Pick a model and talk.
Output
Returns a standard OpenAI-compatible chat completion object including the assistant's text reply, role, finish reason, token counts (prompt, completion, total), a completion ID, and the model name used.
Example use cases
AI-powered code review assistant
“Send this Python function to Claude Opus 5 and ask it to identify bugs, suggest improvements, and explain the changes — keep the reply concise, under 300 tokens.”
Automated customer support draft generation
“Use Claude Opus 5 to write a polite, professional reply to this customer complaint about a delayed shipment; keep the tone empathetic and the response under 200 tokens.”
Complex reasoning for research summarization
“Have Claude Opus 5 read these three paragraphs from a research paper and produce a one-paragraph plain-English summary suitable for a non-technical audience, with temperature set to 0.3 for consistency.”
Technical details
Endpoint
POSThttps://api.adfreellm.com/relay/1787185030319/v1/chat/completionsWhen to prefer
Choose this endpoint when you need Claude Opus 5 specifically — Anthropic's most capable model — on a pay-per-call basis without managing an Anthropic API subscription. It is ideal for agent workflows that require occasional high-quality reasoning bursts and want to pay per invocation via USDC x402 rather than monthly billing. Prefer this over generic LLM endpoints when task complexity justifies Opus-tier intelligence and you want an OpenAI-compatible response schema.
Side effects
- Invalid or missing 'model' field (must be 'claude-opus-5') returns a 400 validation error
- Missing 'messages' array causes a 400 bad request
- Payment not included or insufficient USDC results in a 402 Payment Required response
- Exceeding the upstream model's context window returns a context length error
- Network timeout on long completions if max_tokens is very large
- Streaming errors if the client disconnects mid-stream
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| modelrequired | string | Model ID to use for completion |
| stream | boolean | Enable streaming response |
| messagesrequired | array | Array of chat messages |
| max_tokens | integer | Maximum tokens to generate |
| temperature | number | Sampling temperature 0-2 |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| id | string | |
| model | string | |
| usage | object | |
| object | string | |
| choices | array | |
| created | integer |
Tags
x402
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