AI Inference · x402 · early usage

LLM cost scout: send your monthly OpenAI API spend in USD and get back the flat ChatGPT…

LLM cost scout: send your monthly OpenAI API spend in USD and get back the flat ChatGPT/Codex subscription tier that absorbs it through the ProxyLLM gateway, the exact new monthly total and savings, the live model catalog, and machine-readable signup steps an…

by api.proxyllm.ai · discovered, not yet claimed by its owner · updated 2026-10-08

30d calls2

30d payers2

MethodPOST

Outputjson schema

Mirrored from Coinbase's public x402 Bazaar. The description is the provider's own text and has not been reviewed here; the payment requirements are copied as published.

What it does

Tags: bazaar

Call contract

Method: POST
Input: json
Output: json schema
Last paid call: 2026-10-08

Input example from Bazaar metadata

{
  "monthly_openai_bill_usd": {
    "description": "Current monthly OpenAI API spend in USD",
    "required": true,
    "type": "number"
  }
}

Output example

{
  "type": "string"
}

Use with an agent

Discover. Agents find this listing with GET https://bazaar.saylorinnovations.com/discovery/search?query=…, the MCP tool search_resources, or /discovery/resources.
Inspect. Fetch /resources/42487.json for the price and payment options.
Pay. Call GET https://api.proxyllm.ai/x402/llm-cost-scout. The provider answers 402 with its payment requirements. An x402 client signs one of the options below and retries with PAYMENT-SIGNATURE.
Execute. The provider returns 200 with the data. Agent Bazaar is not in the request path and never sees your payment.

For humans

You don't need an account or an API key; you need a wallet holding a small amount of USDC on Base, and an x402-capable client (see the examples below). Call the endpoint unpaid first to see exactly what it asks for.

Pricing & payment

Price: $0.005 / request
Protocol: x402 v1
Auth: No account or API key. Pay per request.
Networks: Base
Demand: 2 calls · 2 unique payers in 30d (public x402 Bazaar data)

x402 payment requirements

Scheme	Network	Asset	Amount	Pay to	Timeout
exact	Base base	USDC	$0.005	0xF4D43bdAaE23a7d2012C49cb9f57eAaB89D4FfC2	60s

accepts[] (raw JSON)

[
  {
    "scheme": "exact",
    "network": "base",
    "payTo": "0xF4D43bdAaE23a7d2012C49cb9f57eAaB89D4FfC2",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "5000",
    "amountUsd": 0.005,
    "maxTimeoutSeconds": 60
  }
]

Schemas

Output schema (JSON Schema)

{
  "properties": {
    "type": {
      "type": "string"
    }
  },
  "required": [
    "type"
  ],
  "type": "object"
}

Example shape — generated from the schema, not a captured live response

{
  "type": "string"
}

Examples

curl

curl -X POST 'https://api.proxyllm.ai/x402/llm-cost-scout' -H 'Content-Type: application/json' --data '{"monthly_openai_bill_usd":{"description":"Current monthly OpenAI API spend in USD","required":true,"type":"number"}}'
# -> 402 Payment Required; read PAYMENT-REQUIRED
# retry the identical request with PAYMENT-SIGNATURE

JavaScript

const res = await fetch("https://api.proxyllm.ai/x402/llm-cost-scout", {
  "method": "POST",
  "headers": {
    "content-type": "application/json"
  },
  "body": "{\"monthly_openai_bill_usd\":{\"description\":\"Current monthly OpenAI API spend in USD\",\"required\":true,\"type\":\"number\"}}"
});
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

Python

import httpx
import json
res = httpx.request("POST", "https://api.proxyllm.ai/x402/llm-cost-scout", json=json.loads("{\"monthly_openai_bill_usd\":{\"description\":\"Current monthly OpenAI API spend in USD\",\"required\":true,\"type\":\"number\"}}"))
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Details

Provider: api.proxyllm.ai
Endpoint: https://api.proxyllm.ai/x402/llm-cost-scout
Machine-readable: /resources/42487.json