$0.05
per call · USD Coin on Base
LLM Chat: Chat with a language model. OpenAI-compatible /v1/chat/completions interface. Supports 50+ models. Free models (auto, eco, premium) are $0 — paid models (gpt-5.2, claude-opus-5, deepseek-v4-pro, ...) are charged at cost. See /tools/llm_chat/models for the full model list and rates. Pay per call in USDC on Base via x402 — POST https://x402.freeq.one/tools/llm_chat.
Endpoint
POST https://x402.freeq.one/tools/llm_chat5
Calls / 30d
1
Unique payers / 30d
Aug 27
Last called
exact
Payment scheme
Call this service
import { wrapFetchWithPayment } from "@x402/fetch";
import { privateKeyToAccount } from "viem/accounts";
const account = privateKeyToAccount(process.env.PRIVATE_KEY);
const fetchWithPay = wrapFetchWithPayment(fetch, account);
const res = await fetchWithPay("https://x402.freeq.one/tools/llm_chat", {
method: "POST",
headers: { "Content-Type": "application/json" },
body: JSON.stringify({
"max_tokens": {
"description": "Maximum tokens to generate (default 1024, max 4096). Lower values reduce cost for paid models.",
"type": "integer"
},
"messages": {
"description": "Conversation messages array",
"items": {
"properties": {
"content": {
"description": "Message text content",
"type": "string"
},
"role": {
"description": "Message role",
"enum": [
"system",
"user",
"assistant"
],
"type": "string"
}
},
"type": "object"
},
"type": "array"
},
"model": {
"description": "Model ID. Examples: auto/eco/premium (free, $0.002), openai/gpt-5.2, anthropic/claude-opus-5, google/gemini-3.1-pro, deepseek/deepseek-v4-pro. Short names accepted (gpt-5.2, claude-opus-5). See /tools for full list.",
"type": "string"
},
"temperature": {
"description": "Sampling temperature 0-2 (default 0.7)",
"type": "number"
}
}),
});
const data = await res.json();curl -X POST \
"https://x402.freeq.one/tools/llm_chat" \
-H "Content-Type: application/json" \
-d '{"max_tokens":{"description":"Maximum tokens to generate (default 1024, max 4096). Lower values reduce cost for paid models.","type":"integer"},"messages":{"description":"Conversation messages array","items":{"properties":{"content":{"description":"Message text content","type":"string"},"role":{"description":"Message role","enum":["system","user","assistant"],"type":"string"}},"type":"object"},"type":"array"},"model":{"description":"Model ID. Examples: auto/eco/premium (free, $0.002), openai/gpt-5.2, anthropic/claude-opus-5, google/gemini-3.1-pro, deepseek/deepseek-v4-pro. Short names accepted (gpt-5.2, claude-opus-5). See /tools for full list.","type":"string"},"temperature":{"description":"Sampling temperature 0-2 (default 0.7)","type":"number"}}' \
-H "X-PAYMENT: <signed x402 payment>"Payment details
0x90b0dc893406d6ea63bb077ed59f5e8340f98d84USD Coin · 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913Is this your API?
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