coord.taifoon.dev

Live 402 challenge

Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.

{
  "ok": false,
  "code": "payment_required",
  "hint": "pay 0.01 USDC with x402 and send the same request again with the PAYMENT-SIGNATURE (or X-PAYMENT) header; a forecast that fails its check is never charged",
  "x402": {
    "error": "Payment Required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x3574999dd4c96eB73Bd6e11D4177010C83E14f5b",
        "amount": "10000",
        "scheme": "exact",
        "network": "eip155:8453",
        "mimeType": "application/json",
        "resource": "https://coord.taifoon.dev/v1/x402/class/mech.predict",
        "description": "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.",
        "maxAmountRequired": "10000",
        "maxTimeoutSeconds": 300
      },
      {
        "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x3574999dd4c96eB73Bd6e11D4177010C83E14f5b",
        "amount": "10000",
        "scheme": "exact",
        "network": "eip155:42161",
        "mimeType": "application/json",
        "resource": "https://coord.taifoon.dev/v1/x402/class/mech.predict",
        "description": "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.",
        "maxAmountRequired": "10000",
        "maxTimeoutSeconds": 300
      },
      {
        "asset": "0x3600000000000000000000000000000000000000",
        "extra": {
          "name": "USDC",
          "version": "2"
        },
        "payTo": "0x3574999dd4c96eB73Bd6e11D4177010C83E14f5b",
        "amount": "10000",
        "scheme": "exact",
        "network": "eip155:5042",
        "mimeType": "application/json",
        "resource": "https://coord.taifoon.dev/v1/x402/class/mech.predict",
        "description": "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.",
        "maxAmountRequired": "10000",
        "maxTimeoutSeconds": 300
      },
      {
        "asset": "0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168",
        "extra": {
          "name": "Global Dollar",
          "version": "1"
        },
        "payTo": "0x3574999dd4c96eB73Bd6e11D4177010C83E14f5b",
        "amount": "10000",
        "scheme": "exact",
        "network": "eip155:4663",
        "mimeType": "application/json",
        "resource": "https://coord.taifoon.dev/v1/x402/class/mech.predict",
        "description": "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.",
        "maxAmountRequired": "10000",
        "maxTimeoutSeconds": 300
      },
      {
        "asset": "0x754704Bc059F8C67012fEd69BC8A327a5aafb603",
        "extra": {
          "name": "USDC",
          "version": "2"
        },
        "payTo": "0x3574999dd4c96eB73Bd6e11D4177010C83E14f5b",
        "amount": "10000",
        "scheme": "exact",
        "network": "eip155:143",
        "mimeType": "application/json",
        "resource": "https://coord.taifoon.dev/v1/x402/class/mech.predict",
        "description": "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.",
        "maxAmountRequired": "10000",
        "maxTimeoutSeconds": 300
      },
      {
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "F742C4VfFLQ9zRQyithoj5229ZgtX2WqKCSFKgH2EThq"
        },
        "payTo": "GQcEn5pLcweo7qaiy3rDdsiUPiygygmFBaixNtNqhQVD",
        "amount": "10000",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "mimeType": "application/json",
        "resource": "https://coord.taifoon.dev/v1/x402/class/mech.predict",
        "description": "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.",
        "maxAmountRequired": "10000",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://coord.taifoon.dev/v1/x402/class/mech.predict",
      "tags": [
        "mech",
        "predict"
      ],
      "iconUrl": "https://www.taifoon.io/apple-touch-icon.png",
      "mimeType": "application/json",
      "description": "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.",
      "serviceName": "Taifoon"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "question": "Will Bitcoin be above $100,000 on December 31, 2026?"
            },
            "type": "http",
            "method": "POST",
            "bodyType": "json"
          },
          "output": {
            "type": "json",
            "example": {
              "tool": "prediction-tape",
              "prompt": "Will Bitcoin be above $100,000 on December 31, 2026?",
              "result": "{\"p_yes\":0.31,\"p_no\":0.69,\"confidence\":0.6,\"info_utility\":0.7}",
              "forecast": {
                "p_no": 0.69,
                "p_yes": 0.31,
                "sources": [
                  {
                    "url": "https://clob.taifoon.dev/tape/v1/candles/BTC/1m?from=…&to=…",
                    "kind": "tape",
                    "what": "the last closed 1-minute BTC bar (its close is the spot)",
                    "as_of": "…",
                    "value": 0
                  }
                ],
                "grounded": "tape",
                "reasoning": "BTC closed at … USD on the Taifoon venue tape …; a driftless lognormal price ends at or above 100,000 with probability 0.31. …",
                "confidence": 0.6,
                "info_utility": 0.7
              },
              "follow_up": {
                "id": "fc_…",
                "state": "PENDING",
                "resolver": "tape"
              },
              "requestId": "fc_…"
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method",
                "bodyType",
                "body"
              ],
              "properties": {
                "body": {
                  "type": "object",
                  "required": [
                    "question"
                  ],
                  "properties": {
                    "question": {
                      "type": "string",
                      "maxLength": 2000,
                      "minLength": 8,
                      "description": "one yes/no question (or the Olas prompt \"With the given question \\\"…\\\" …\")"
                    }
                  }
                },
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "POST",
                    "PUT",
                    "PATCH"
                  ],
                  "type": "string"
                },
                "headers": {
                  "type": "object",
                  "additionalProperties": {
                    "type": "string"
                  }
                },
                "bodyType": {
                  "enum": [
                    "json",
                    "form-data",
                    "text"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "type": "object",
                  "additionalProperties": {
                    "type": "string"
                  }
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object",
                  "required": [
                    "requestId",
                    "result",
                    "prompt",
                    "tool"
                  ],
                  "properties": {
                    "tool": {
                      "enum": [
                        "prediction-tape",
                        "prediction-offline"
                      ],
                      "type": "string"
                    },
                    "prompt": {
                      "type": "string"
                    },
                    "result": {
                      "type": "string",
                      "description": "JSON string { p_yes, p_no, confidence, info_utility }, each in [0, 1], p_yes + p_no = 1 (the Olas prediction tools’ result)"
                    },
                    "forecast": {
                      "type": "object",
                      "description": "p_yes, p_no, confidence, info_utility, reasoning, grounded (tape | none), sources (each a GET that replays it), limits"
                    },
                    "follow_up": {
                      "type": "object",
                      "description": "the row kept for scoring once the question resolves: id, resolver (tape | null), state (PENDING | MISSING)"
                    },
                    "requestId": {
                      "type": "string"
                    }
                  }
                }
              }
            }
          }
        }
      }
    },
    "x402Version": 2,
    "without_x402": {
      "why": "x402 is settled on eip155:8453 (Base), eip155:42161 (Arbitrum One), eip155:5042 (Arc), eip155:4663 (Robinhood Chain), eip155:143 (Monad), solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp (Solana): pay the entry of the network you hold the dollar token on. A key with a balance is the other way to pay, the same price on any of them.",
      "direct": {
        "then": "send the same request with X-API-Key: it is paid from the balance at the same price",
        "quote": "GET https://www.taifoon.io/v1/access/quote?usdc=1&chainId=<id> with X-API-Key (POST /v1/register for one), then POST /v1/access/topup { tx, signature, chainId }",
        "chains": [
          "eip155:8453 (Base, USDC)",
          "eip155:42161 (Arbitrum One, USDC)",
          "eip155:5042 (Arc, USDC)",
          "eip155:4663 (Robinhood Chain, USDG)",
          "eip155:143 (Monad, USDC)"
        ],
        "for_a_person": "https://www.taifoon.io/pricing"
      },
      "settles_x402": [
        "eip155:8453",
        "eip155:42161",
        "eip155:5042",
        "eip155:4663",
        "eip155:143",
        "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp"
      ]
    }
  },
  "error": "one mech.predict forecast is 0.01 USDC; it is checked (valid probabilities summing to 1) before you are charged. Note: send { question } with one yes/no question (8 to 2000 characters)",
  "terms": {
    "per": "forecast",
    "basis": "cost of one x402 call = one studio-lane inference of at most about 1,500 tokens at the spot price (0.0003 USD) + two tape reads (0.0008548 USD at the market.price read cost) + one facilitator settlement (0.001 USD) = 0.0021548 USD; x 1.5 (ACCESS_MARGIN_BPS) = 0.0032322 USDC, the floor. List 0.01 USDC = the price of one request on the Olas Mech marketplace on Gnosis (0.01 xDAI, docs/MARKETPLACES.md), where this class is bought: above the floor and the x402 minimum (0.001)",
    "class": "mech.predict",
    "tools": {
      "prediction-tape": "a price question about BTC, ETH or SOL with a threshold and a date: the probability from the Taifoon venue tape (the last close, 30 days of hourly bars for the volatility, a driftless lognormal model; a touch question by the reflection rule); sources are the tape GETs that replay the inputs",
      "prediction-offline": "any other yes/no question: the studio lane's own estimate (no web search, no news after its training data); sources are empty, confidence at most 0.3 and info_utility at most 0.2"
    },
    "catalogue": "https://coord.taifoon.dev/v1/products (x402.per_call)",
    "key_price": "a key pays the GPU tokens it used at the spot list price (0.2 USDC per 1M tokens, taifoon.gpu units.spot) from its one balance; nothing else",
    "served_by": "taifoon (the venue tape, the studio GPU lane)",
    "price_usdc": 0.01,
    "resolution": "every forecast is kept as a follow-up row for scoring once its question resolves; a tape question resolves from the tape at its date (resolver tape), any other question has no resolver (MISSING)",
    "price_units": "10000",
    "venue_classes": [
      "predict.market"
    ]
  },
  "next_step": {
    "why": "pay 0.01 USDC with x402 and send the same request again with the PAYMENT-SIGNATURE (or X-PAYMENT) header; a forecast that fails its check is never charged",
    "also": [
      {
        "why": "a key with a balance pays the same 0.01 USDC from its one balance: send X-API-Key",
        "http": {
          "url": "https://coord.taifoon.dev/v1/register",
          "method": "POST"
        },
        "action": "use_instead"
      }
    ],
    "http": {
      "url": "https://coord.taifoon.dev/v1/x402/class/mech.predict",
      "body": {
        "question": "Will Bitcoin be above $100,000 on December 31, 2026?"
      },
      "header": "PAYMENT-SIGNATURE",
      "method": "POST"
    },
    "price": {
      "per": "forecast",
      "chain": 8453,
      "amount": "0.01",
      "currency": "USDC"
    },
    "action": "retry",
    "evaluator": "/v1/judge/evaluator"
  }
}

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x3574999dd4c96eB73Bd6e11D4177010C83E14f5b",
    "scheme": "exact",
    "network": "eip155:8453",
    "mimeType": "application/json",
    "resource": "https://coord.taifoon.dev/v1/x402/class/mech.predict",
    "description": "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 Ta…",
    "maxAmountRequired": "10000",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x3574999dd4c96eB73Bd6e11D4177010C83E14f5b",
    "scheme": "exact",
    "network": "eip155:42161",
    "mimeType": "application/json",
    "resource": "https://coord.taifoon.dev/v1/x402/class/mech.predict",
    "description": "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 Ta…",
    "maxAmountRequired": "10000",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "0x3600000000000000000000000000000000000000",
    "extra": {
      "name": "USDC",
      "version": "2"
    },
    "payTo": "0x3574999dd4c96eB73Bd6e11D4177010C83E14f5b",
    "scheme": "exact",
    "network": "eip155:5042",
    "mimeType": "application/json",
    "resource": "https://coord.taifoon.dev/v1/x402/class/mech.predict",
    "description": "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 Ta…",
    "maxAmountRequired": "10000",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168",
    "extra": {
      "name": "Global Dollar",
      "version": "1"
    },
    "payTo": "0x3574999dd4c96eB73Bd6e11D4177010C83E14f5b",
    "scheme": "exact",
    "network": "eip155:4663",
    "mimeType": "application/json",
    "resource": "https://coord.taifoon.dev/v1/x402/class/mech.predict",
    "description": "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 Ta…",
    "maxAmountRequired": "10000",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "0x754704Bc059F8C67012fEd69BC8A327a5aafb603",
    "extra": {
      "name": "USDC",
      "version": "2"
    },
    "payTo": "0x3574999dd4c96eB73Bd6e11D4177010C83E14f5b",
    "scheme": "exact",
    "network": "eip155:143",
    "mimeType": "application/json",
    "resource": "https://coord.taifoon.dev/v1/x402/class/mech.predict",
    "description": "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 Ta…",
    "maxAmountRequired": "10000",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "extra": {
      "feePayer": "F742C4VfFLQ9zRQyithoj5229ZgtX2WqKCSFKgH2EThq"
    },
    "payTo": "GvwY5YcB7NqU8DMENC5A5fGKp2SDvs4Bx3r5Yu4YHLqZ",
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "mimeType": "application/json",
    "resource": "https://coord.taifoon.dev/v1/x402/class/mech.predict",
    "description": "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 Ta…",
    "maxAmountRequired": "10000",
    "maxTimeoutSeconds": 300
  }
]

Provenance

Seen in the source catalog

2026-10-12 13:21Z

Last indexed by Roundhouse

2026-10-19 18:15Z

Last enriched (probe, favicon, geo)

2026-10-15 15:15Z

x402 version

1

Max timeout

300s

Liveness probe

HTTP 402