Market Data · x402 · early usage

Olas-style yes/no forecast: { question } in, { p_yes, p_no, confidence, info_utility }…

Name: Olas-style yes/no forecast: { question } in, { p_yes, p_no, confidence, info_utility } out
Price: 0.01 USD
Availability: InStock

by coord.taifoon.dev · discovered, not yet claimed by its owner · updated 2026-10-12

30d calls2

30d payers2

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

Olas-style yes/no forecast: { question } in, { p_yes, p_no, confidence, info_utility } out with reasoning and sources. BTC/ETH/SOL price questions with a threshold and a date are modelled from the Taifoon venue tape (sources replayable); any other question is a small open model's prior with no web search (no sources, confidence at most 0.3). Checked before you are charged. 0.01 USDC a forecast.

Tags: bazaar

Call contract

Method: POST
Input: json
Output: json
Last paid call: 2026-10-12

Input example from Bazaar metadata

{
  "question": "Will Bitcoin be above $100,000 on December 31, 2026?"
}

Output example

{
  "follow_up": {
    "id": "fc_…",
    "resolver": "tape",
    "state": "PENDING"
  },
  "forecast": {
    "confidence": 0.6,
    "grounded": "tape",
    "info_utility": 0.7,
    "p_no": 0.69,
    "p_yes": 0.31,
    "reasoning": "BTC closed at … USD on the Taifoon venue tape …; a driftless lognormal price ends at or above 100,000 with probability 0.31. …",
    "sources": [
      {
        "as_of": "…",
        "kind": "tape",
        "url": "https://clob.taifoon.dev/tape/v1/candles/BTC/1m?from=…&to=…",
        "value": 0,
        "what": "the last closed 1-minute BTC bar (its close is the spot)"
      }
    ]
  },
  "prompt": "Will Bitcoin be above $100,000 on December 31, 2026?",
  "requestId": "fc_…",
  "result": "{\"p_yes\":0.31,\"p_no\":0.69,\"confidence\":0.6,\"info_utility\":0.7}",
  "tool": "prediction-tape"
}

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/39996.json for the price and payment options.
Pay. Call GET https://coord.taifoon.dev/v1/x402/class/mech.predict. 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, Arbitrum One, eip155:5042, eip155:4663, eip155:143, Solana, and an x402-capable client (see the examples below). Call the endpoint unpaid first to see exactly what it asks for.

Pricing & payment

Price: $0.01 / request
Protocol: x402 v2
Auth: No account or API key. Pay per request.
Networks: Base, Arbitrum One, eip155:5042, eip155:4663, eip155:143, Solana
Demand: 2 calls · 2 unique payers in 30d (public x402 Bazaar data)

x402 payment requirements

Scheme	Network	Asset	Amount	Pay to	Timeout
exact	Base eip155:8453	USDC	$0.01	0x3574999dd4c96eB73Bd6e11D4177010C83E14f5b	300s
exact	Arbitrum One eip155:42161	USDC	$0.01	0x3574999dd4c96eB73Bd6e11D4177010C83E14f5b	300s
exact	eip155:5042 eip155:5042	0x3600000000000000000000000000000000000000	10000	0x3574999dd4c96eB73Bd6e11D4177010C83E14f5b	300s
exact	eip155:4663 eip155:4663	0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168	10000	0x3574999dd4c96eB73Bd6e11D4177010C83E14f5b	300s
exact	eip155:143 eip155:143	0x754704Bc059F8C67012fEd69BC8A327a5aafb603	10000	0x3574999dd4c96eB73Bd6e11D4177010C83E14f5b	300s
exact	Solana solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp	USDC	$0.01	GvwY5YcB7NqU8DMENC5A5fGKp2SDvs4Bx3r5Yu4YHLqZ	300s

accepts[] (raw JSON)

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x3574999dd4c96eB73Bd6e11D4177010C83E14f5b",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "10000",
    "amountUsd": 0.01,
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "eip155:42161",
    "payTo": "0x3574999dd4c96eB73Bd6e11D4177010C83E14f5b",
    "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
    "amount": "10000",
    "amountUsd": 0.01,
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "eip155:5042",
    "payTo": "0x3574999dd4c96eB73Bd6e11D4177010C83E14f5b",
    "asset": "0x3600000000000000000000000000000000000000",
    "amount": "10000",
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "eip155:4663",
    "payTo": "0x3574999dd4c96eB73Bd6e11D4177010C83E14f5b",
    "asset": "0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168",
    "amount": "10000",
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "eip155:143",
    "payTo": "0x3574999dd4c96eB73Bd6e11D4177010C83E14f5b",
    "asset": "0x754704Bc059F8C67012fEd69BC8A327a5aafb603",
    "amount": "10000",
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "payTo": "GvwY5YcB7NqU8DMENC5A5fGKp2SDvs4Bx3r5Yu4YHLqZ",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "10000",
    "amountUsd": 0.01,
    "maxTimeoutSeconds": 300
  }
]

Schemas

Output schema (JSON Schema)

{
  "properties": {
    "example": {
      "properties": {
        "follow_up": {
          "description": "the row kept for scoring once the question resolves: id, resolver (tape | null), state (PENDING | MISSING)",
          "type": "object"
        },
        "forecast": {
          "description": "p_yes, p_no, confidence, info_utility, reasoning, grounded (tape | none), sources (each a GET that replays it), limits",
          "type": "object"
        },
        "prompt": {
          "type": "string"
        },
        "requestId": {
          "type": "string"
        },
        "result": {
          "description": "JSON string { p_yes, p_no, confidence, info_utility }, each in [0, 1], p_yes + p_no = 1 (the Olas prediction tools’ result)",
          "type": "string"
        },
        "tool": {
          "enum": [
            "prediction-tape",
            "prediction-offline"
          ],
          "type": "string"
        }
      },
      "required": [
        "requestId",
        "result",
        "prompt",
        "tool"
      ],
      "type": "object"
    },
    "type": {
      "type": "string"
    }
  },
  "required": [
    "type"
  ],
  "type": "object"
}

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

{
  "example": {
    "follow_up": {},
    "forecast": {},
    "prompt": "string",
    "requestId": "string",
    "result": "string",
    "tool": "prediction-tape"
  },
  "type": "string"
}

Examples

curl

curl "https://coord.taifoon.dev/v1/x402/class/mech.predict"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://coord.taifoon.dev/v1/x402/class/mech.predict");
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://coord.taifoon.dev/v1/x402/class/mech.predict")
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: coord.taifoon.dev
Endpoint: https://coord.taifoon.dev/v1/x402/class/mech.predict
Machine-readable: /resources/39996.json