Class Mech Predict

{
  "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"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://coord.taifoon.dev/v1/x402/class/mech.predict' \
  -H 'content-type: application/json' \
  --data-raw '{"question":"Will Bitcoin be above $100,000 on December 31, 2026?"}'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - -X POST 'https://coord.taifoon.dev/v1/x402/class/mech.predict' \
  -H 'content-type: application/json' \
  --data-raw '{"question":"Will Bitcoin be above $100,000 on December 31, 2026?"}' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode

// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.01 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.01" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.01 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fcoord.taifoon.dev%2Fv1%2Fx402%2Fclass%2Fmech.predict&method=POST
const res = await pay("https://coord.taifoon.dev/v1/x402/class/mech.predict", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "question": "Will Bitcoin be above $100,000 on December 31, 2026?"
  }),
});
console.log(res.status, await res.text());

# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.01 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.01"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://coord.taifoon.dev/v1/x402/class/mech.predict",
        json={
            "question": "Will Bitcoin be above $100,000 on December 31, 2026?",
        },
    )
    print(res.status_code, res.text)