$0.002
per call · USD Coin on Base
LLM chat completion per call — no account, no API key, no token math. Three flat-priced tiers: fast $0.002 (DeepSeek v4 Flash), smart $0.02 (GPT-5.4 mini), reasoning $0.03 (DeepSeek v4 Pro). Send OpenAI-style messages, get the assistant reply with finish_reason and token usage. Input capped per tier (16k-32k chars); the 402 quotes the exact tier price up front. Model or source unavailable means a 503 and you pay nothing. USDC on Base.
Endpoint
POST https://agentdata-api.sander-van-aard.workers.dev/llm/chat1
Calls / 30d
1
Unique payers / 30d
Aug 30
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://agentdata-api.sander-van-aard.workers.dev/llm/chat", {
method: "POST",
headers: { "Content-Type": "application/json" },
body: JSON.stringify({
"max_tokens": 256,
"messages": [
{
"content": "Summarize x402 in one sentence.",
"role": "user"
}
],
"model": "fast"
}),
});
const data = await res.json();curl -X POST \
"https://agentdata-api.sander-van-aard.workers.dev/llm/chat" \
-H "Content-Type: application/json" \
-d '{"max_tokens":256,"messages":[{"content":"Summarize x402 in one sentence.","role":"user"}],"model":"fast"}' \
-H "X-PAYMENT: <signed x402 payment>"Example response
{
"content": "x402 is an HTTP-native payment protocol that lets clients pay per request in stablecoins.",
"finish_reason": "stop",
"generated_at": "2026-07-30T08:00:00.000Z",
"model": "deepseek/deepseek-v4-flash",
"tier": "fast",
"usage": {
"completion_tokens": 21,
"prompt_tokens": 18
}
}Payment details
0xb0ae6a9bd7a573ddda58db6c28622417e8ca2099USD Coin · 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913Is this your API?
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