ToolVet
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Chat Completions

by chat-completions-api in AI models & inference

x402 APIPassing, checked 3 h ago

437 models, no account, no API key, pay per call in USDC - OpenAI-compatible chat completions and AI inference gateway (Claude, GPT, Gemini, Llama, Mistral and more in one endpoint). Price: from $0.001, computed from your max_tokens × model rate × 1.10 (you sign a ceiling; unused tokens are not refunded). 20s server-side timeout - never charged if it fires; set your client timeout to 30s. Try GET /v1/chat/completions/sample.

POST https://x402.agentindex.world/v1/chat/completions

Last 30 days

All checks passedSome failedAll failedNot checked
Uptime
100%
Response time
96 ms typical, 96 ms slowest 5%
Last check
3 h ago
Next check
any minute now

How to call it

# See the payment challenge (nothing is charged)
curl -i -X POST "https://x402.agentindex.world/v1/chat/completions" \
  -H "content-type: application/json" \
  -d '{"max_tokens":5,"messages":[{"content":"Say OK.","role":"user"}],"model":"openai/gpt-4o-mini"}'
import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { ExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client().register(
  "eip155:8453",
  new ExactEvmScheme(privateKeyToAccount(process.env.AGENT_KEY)),
);
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? Preflight it first for $0.03:
// GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fx402.agentindex.world%2Fv1%2Fchat%2Fcompletions
const res = await pay("https://x402.agentindex.world/v1/chat/completions", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({"max_tokens":5,"messages":[{"content":"Say OK.","role":"user"}],"model":"openai/gpt-4o-mini"}),
});
console.log(await res.json());

Example input

{
  "max_tokens": 5,
  "messages": [
    {
      "content": "Say OK.",
      "role": "user"
    }
  ],
  "model": "openai/gpt-4o-mini"
}

Example output

{
  "choices": [
    {
      "finish_reason": "stop",
      "index": 0,
      "message": {
        "content": "OK.",
        "role": "assistant"
      }
    }
  ],
  "id": "gen-1790576252-UzfZJjqk0Ld9PGyd1ADA",
  "model": "openai/gpt-4o-mini",
  "object": "chat.completion",
  "usage": {
    "completion_tokens": 2,
    "prompt_tokens": 10,
    "total_tokens": 12
  },
  "x402_receipt": {
    "latency_ms": 612,
    "model_served": "openai/gpt-4o-mini",
    "price_paid_usdc": 0.001,
    "upstream": "llm-gateway"
  }
}

Security scan

  • No findings. We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

Recent checks

WhenResultHTTPTimePrice
3 h agoPassed40296 ms$0.001