Market Data · x402 · early usage

Jev Decision ($0.005/call): Ask Jev (TypeSafe System One) typed questions about one sta…

by x402.botsmith.dev · discovered, not yet claimed by its owner · updated 2026-10-10

30d calls4

30d payers3

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

Jev Decision ($0.005/call): Ask Jev (TypeSafe System One) typed questions about one state and get numbers back, not text: noul answers the probability a yes/no is yes; choice picks an option with a probability for every option; score places the state on an ordered scale of levels with a probability for every level. Same body and answer as TypeSafe's POST /v1/systemone (model optional, state as text or JSON, questions keyed by your ids), so their docs and SDK question helpers apply; pay

Tags: jev · typesafe · decision · probability · classification · bazaar

Call contract

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

Input example from Bazaar metadata

{
  "model": "jev-latest",
  "questions": {
    "crowded": {
      "instructions": "Is the long side crowded enough that a sharp move down is more likely than up over the next day?",
      "type": "noul"
    },
    "stance": {
      "criteria": {
        "flat": "Stay out until funding normalises",
        "long": "Open or add to a long position",
        "short": "Open a short against the crowded long side"
      },
      "instructions": "Which stance fits this state best?",
      "type": "choice"
    }
  },
  "state": "BTC perpetual funding rate is +0.08% per 8h, open interest at an all-time high, price flat for 3 days."
}

Output example

{
  "answers": {
    "crowded": {
      "noul": 0.6,
      "type": "noul"
    },
    "stance": {
      "choice": "short",
      "confidence": 0.67,
      "probabilities": {
        "flat": 0.21,
        "long": 0.01,
        "short": 0.78
      },
      "type": "choice"
    }
  },
  "model": "jev-1.13.0",
  "usage": {
    "input_tokens": 440,
    "output_tokens": 53
  }
}

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/25920.json for the price and payment options.
Pay. Call GET https://x402.botsmith.dev/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: 4 calls · 3 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	0xcb9b3F94387389e38EF2A7b3C0B851FB8325d7e9	60s

accepts[] (raw JSON)

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0xcb9b3F94387389e38EF2A7b3C0B851FB8325d7e9",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "5000",
    "amountUsd": 0.005,
    "maxTimeoutSeconds": 60
  }
]

Schemas

Output schema (JSON Schema)

{
  "properties": {
    "example": {
      "additionalProperties": false,
      "properties": {
        "answers": {
          "additionalProperties": {
            "oneOf": [
              {
                "additionalProperties": false,
                "properties": {
                  "noul": {
                    "description": "Probability the answer is yes, 0 to 1",
                    "type": "number"
                  },
                  "type": {
                    "const": "noul",
                    "type": "string"
                  }
                },
                "required": [
                  "type",
                  "noul"
                ],
                "type": "object"
              },
              {
                "additionalProperties": false,
                "properties": {
                  "choice": {
                    "type": "string"
                  },
                  "confidence": {
                    "type": "number"
                  },
                  "probabilities": {
                    "additionalProperties": {
                      "type": "number"
                    },
                    "propertyNames": {
                      "type": "string"
                    },
                    "type": "object"
                  },
                  "type": {
                    "const": "choice",
                    "type": "string"
                  }
                },
                "required": [
                  "type",
                  "choice",
                  "confidence",
                  "probabilities"
                ],
                "type": "object"
              },
              {
                "additionalProperties": false,
                "properties": {
                  "confidence": {
                    "type": "number"
                  },
                  "legend": {
                    "additionalProperties": {
                      "type": "string"
                    },
                    "propertyNames": {
                      "type": "string"
                    },
                    "type": "object"
                  },
                  "probabilities": {
                    "additionalProperties": {
                      "type": "number"
                    },
                    "propertyNames": {
                      "type": "string"
                    },
                    "type": "object"
                  },
                  "score": {
                    "description": "Probability-weighted level index, 0 = first",
                    "type": "number"
                  },
                  "type": {
                    "const": "score",
                    "type": "string"
                  }
                },
                "required": [
                  "type",
                  "score",
                  "confidence",
                  "legend",
                  "probabilities"
                ],
                "type": "object"
              }
            ]
          },
          "description": "One per question id",
          "propertyNames": {
            "type": "string"
          },
          "type": "object"
        },
        "model": {
          "description": "Model version that answered",
          "type": "string"
        },
        "usage": {
          "additionalProperties": false,
          "properties": {
            "input_tokens": {
              "maximum": 9007199254740991,
              "minimum": -9007199254740991,
              "type": "integer"
            },
            "output_tokens": {
              "maximum": 9007199254740991,
              "minimum": -9007199254740991,
              "type": "integer"
            }
          },
          "required": [
            "input_tokens",
            "output_tokens"
          ],
          "type": "object"
        }
      },
      "required": [
        "model",
        "answers",
        "usage"
      ],
      "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://x402.botsmith.dev/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://x402.botsmith.dev/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://x402.botsmith.dev/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: x402.botsmith.dev
Endpoint: https://x402.botsmith.dev/jev
Machine-readable: /resources/25920.json