Cheapest-model router: send your token workload and get every current LLM ranked by estima

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x470a1b647d668d3820add26d70c8371557ff4c6b",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "5000",
    "maxTimeoutSeconds": 120
  }
]

{
  "bazaar": {
    "info": {
      "input": {
        "method": "GET",
        "queryParams": {
          "input_tokens": "20000",
          "limit": "100",
          "min_context": "200000",
          "offset": "0",
          "output_tokens": "1500"
        },
        "type": "http"
      },
      "output": {
        "example": {
          "cheapest": {
            "est_cost_usd": 0.0031,
            "model": "example-mini",
            "provider": "example"
          },
          "count": 266,
          "filters": {
            "min_context": 200000,
            "provider": null,
            "unknown_context_excluded": 40,
            "verified_only": false
          },
          "page": {
            "has_more": true,
            "limit": 100,
            "next_offset": 100,
            "offset": 0,
            "returned": 100,
            "total": 266
          },
          "results": [
            {
              "as_of": "2026-08-17",
              "context_window_tokens": 200000,
              "est_cost_usd": 0.0031,
              "input_per_mtok_usd": 0.1,
              "model": "example-mini",
              "output_per_mtok_usd": 0.4,
              "provider": "example",
              "source": "https://example.com/pricing",
              "verification": "operator-verified"
            }
          ],
          "workload": {
            "input_tokens": 20000,
            "output_tokens": 1500
          }
        },
        "type": "json"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "additionalProperties": false,
          "properties": {
            "method": {
              "enum": [
                "GET",
                "HEAD"
              ],
              "type": "string"
            },
            "queryParams": {
              "properties": {
                "include_unknown_context": {
                  "description": "1/true to also rank models whose context window is unverified when min_context is set",
                  "type": "string"
                },
                "input_tokens": {
                  "description": "Input tokens per request (default 1000)",
                  "type": "string"
                },
                "limit": {
                  "description": "Rows per page, 1-100 (default 100)",
                  "type": "string"
                },
                "min_context": {
                  "description": "Only models with at least this context window. Models whose window is null (not verified) are excluded and counted in filters.unknown_context_excluded.",
                  "type": "string"
                },
                "offset": {
                  "description": "Skip this many ranked models (default 0). Use page.next_offset from the previous response. A page past the end costs nothing.",
                  "type": "string"
                },
                "output_tokens": {
                  "description": "Output tokens per request (default 1000)",
                  "type": "string"
                },
                "provider": {
                  "description": "Filter to one vendor token, e.g. anthropic, openai, x-ai, mistralai, qwen. Matched exactly against the vendor (punctuation and case ignored, so x-ai and xai are the same token) — never as a prefix, because meta and meta-llama are different vendors. Every response carries providers_available; a token that matches nothing is refused for free and names the near misses.",
                  "type": "string"
                },
                "verified_only": {
                  "description": "1/true to rank only operator-verified rows, dropping the marketplace catalog",
                  "type": "string"
                }
              },
              "type": "object"
            },
            "type": {
              "const": "http",
              "type": "string"
            }
          },
          "required": [
            "type",
            "method"
          ],
          "type": "object"
        },
        "output": {
          "properties": {
            "example": {
              "type": "object"
            },
            "type": {
              "type": "string"
            }
          },
          "required": [
            "type"
          ],
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    }
  }
}

curl "https://datastand.dev/api/llm/route"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

const res = await fetch("https://datastand.dev/api/llm/route");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

import httpx
res = httpx.get("https://datastand.dev/api/llm/route")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header