AI Inference · x402 · early usage

Structured evaluation with TypeSafe's Jev (System One) model

Structured evaluation with TypeSafe's Jev (System One) model. Send any state plus typed questions — noul (true/false), choice (pick one), or score (ordinal scale) — and get back calibrated probabilities and confidence for each. Built for routing, classificati…

by jev-systemone.vercel.app · discovered, not yet claimed by its owner · updated 2026-10-13

30d calls9

30d payers5

MethodPOST

Outputjson

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: ai · classification · routing · decision · llm · bazaar

Call contract

Method: POST
Input: json
Output: json
Last paid call: 2026-10-13

Input example from Bazaar metadata

{
  "model": "jev-latest",
  "questions": {
    "needs_review": {
      "criteria": {
        "false": "a routine question a bot can close",
        "true": "money, legal, or an unanswered complaint"
      },
      "instructions": "Does this ticket need a human agent?",
      "type": "noul"
    },
    "route": {
      "criteria": {
        "billing": "payment or charge problems",
        "shipping": "delivery problems",
        "technical": "application bugs"
      },
      "instructions": "Route this ticket to a team.",
      "type": "choice"
    },
    "urgency": {
      "criteria": [
        "low",
        "medium",
        "high"
      ],
      "instructions": "How urgent is this ticket?",
      "type": "score"
    }
  },
  "state": "My card was charged twice for one order and nobody has replied in three days."
}

Output example

{
  "answers": {
    "needs_review": {
      "noul": 0.94,
      "type": "noul"
    },
    "route": {
      "choice": "billing",
      "confidence": 1,
      "probabilities": {
        "billing": 1,
        "shipping": 0,
        "technical": 0
      },
      "type": "choice"
    },
    "urgency": {
      "confidence": 0.83,
      "legend": {
        "0": "low",
        "1": "medium",
        "2": "high"
      },
      "probabilities": {
        "0": 0,
        "1": 0.11,
        "2": 0.89
      },
      "score": 1.89,
      "type": "score"
    }
  },
  "model": "jev-1.13.0",
  "usage": {
    "input_tokens": 423,
    "output_tokens": 70
  }
}

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/33509.json for the price and payment options.
Pay. Call GET https://jev-systemone.vercel.app/jev. 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 v2
Auth: No account or API key. Pay per request.
Networks: Base
Demand: 9 calls · 5 unique payers in 30d (public x402 Bazaar data)

x402 payment requirements

Scheme	Network	Asset	Amount	Pay to	Timeout
exact	Base eip155:8453	USDC	$0.005	0xE813d34C0525E0fBb1e6478B86D40B83603C2008	120s

accepts[] (raw JSON)

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0xE813d34C0525E0fBb1e6478B86D40B83603C2008",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "5000",
    "amountUsd": 0.005,
    "maxTimeoutSeconds": 120
  }
]

Schemas

Output schema (JSON Schema)

{
  "properties": {
    "example": {
      "properties": {
        "answers": {
          "description": "One entry per question asked. 'noul' answers carry a probability; 'choice' answers carry the chosen label, a confidence and per-option probabilities; 'score' answers carry a calibrated score, confidence, legend and per-level probabilities.",
          "type": "object"
        },
        "model": {
          "description": "Resolved Jev model version.",
          "type": "string"
        },
        "usage": {
          "properties": {
            "input_tokens": {
              "type": "number"
            },
            "output_tokens": {
              "type": "number"
            }
          },
          "type": "object"
        }
      },
      "type": "object"
    },
    "type": {
      "type": "string"
    }
  },
  "required": [
    "type"
  ],
  "type": "object"
}

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

{
  "example": {
    "answers": {},
    "model": "string",
    "usage": {
      "input_tokens": 0,
      "output_tokens": 0
    }
  },
  "type": "string"
}

Examples

curl

curl "https://jev-systemone.vercel.app/jev"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://jev-systemone.vercel.app/jev");
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
res = httpx.get("https://jev-systemone.vercel.app/jev")
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: jev-systemone.vercel.app
Endpoint: https://jev-systemone.vercel.app/jev
Machine-readable: /resources/33509.json