Ethereum Up Down 15m

{
  "asset": "ETH",
  "data_quality": {
    "label": "adequate_input_coverage",
    "observations_used": 8,
    "score": 0.754056
  },
  "estimate": {
    "lean": "up",
    "p_down": 0.199594,
    "p_up": 0.800406
  },
  "horizon_minutes": 15,
  "input_provenance": "caller_supplied",
  "model": {
    "deterministic_for_same_input": true,
    "no_live_market_data": true,
    "probability_is_uncalibrated": true,
    "version": "delx-local-updown-v1"
  },
  "schema": "delx/prediction-updown-estimate/v1",
  "status": "estimate",
  "warnings": [
    "caller_supplied_prices_not_verified",
    "probability_is_uncalibrated",
    "not_trading_advice"
  ]
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://api.delx.ai/api/v1/x402/ethereum-up-down-15m' \
  -H 'content-type: application/json' \
  --data-raw '{"fee_bps":50,"market_down_price":0.54,"market_up_price":0.48,"observations":[{"price":4000,"timestamp":1799999100},{"price":4001.4,"timestamp":1799999212},{"price":4002.8,"timestamp":1799999324},{"price":4004.2,"timestamp":1799999436},{"price":4005.6,"timestamp":1799999548},{"price":4007,"timestamp":1799999660},{"price":4008.4,"timestamp":1799999772},{"price":4009.8,"timestamp":1799999884}],"window_close_timestamp":1800000000,"window_open_price":4000}'

# 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://api.delx.ai/api/v1/x402/ethereum-up-down-15m' \
  -H 'content-type: application/json' \
  --data-raw '{"fee_bps":50,"market_down_price":0.54,"market_up_price":0.48,"observations":[{"price":4000,"timestamp":1799999100},{"price":4001.4,"timestamp":1799999212},{"price":4002.8,"timestamp":1799999324},{"price":4004.2,"timestamp":1799999436},{"price":4005.6,"timestamp":1799999548},{"price":4007,"timestamp":1799999660},{"price":4008.4,"timestamp":1799999772},{"price":4009.8,"timestamp":1799999884}],"window_close_timestamp":1800000000,"window_open_price":4000}' \
  | 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 $0.003 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.003" });
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 $0.003 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.delx.ai%2Fapi%2Fv1%2Fx402%2Fethereum-up-down-15m&method=POST
const res = await pay("https://api.delx.ai/api/v1/x402/ethereum-up-down-15m", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "fee_bps": 50,
    "market_down_price": 0.54,
    "market_up_price": 0.48,
    "observations": [
      {
        "price": 4000,
        "timestamp": 1799999100
      },
      {
        "price": 4001.4,
        "timestamp": 1799999212
      },
      {
        "price": 4002.8,
        "timestamp": 1799999324
      },
      {
        "price": 4004.2,
        "timestamp": 1799999436
      },
      {
        "price": 4005.6,
        "timestamp": 1799999548
      },
      {
        "price": 4007,
        "timestamp": 1799999660
      },
      {
        "price": 4008.4,
        "timestamp": 1799999772
      },
      {
        "price": 4009.8,
        "timestamp": 1799999884
      }
    ],
    "window_close_timestamp": 1800000000,
    "window_open_price": 4000
  }),
});
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 $0.003 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.003"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://api.delx.ai/api/v1/x402/ethereum-up-down-15m",
        json={
            "fee_bps": 50,
            "market_down_price": 0.54,
            "market_up_price": 0.48,
            "observations": [
                {
                    "price": 4000,
                    "timestamp": 1799999100,
                },
                {
                    "price": 4001.4,
                    "timestamp": 1799999212,
                },
                {
                    "price": 4002.8,
                    "timestamp": 1799999324,
                },
                {
                    "price": 4004.2,
                    "timestamp": 1799999436,
                },
                {
                    "price": 4005.6,
                    "timestamp": 1799999548,
                },
                {
                    "price": 4007,
                    "timestamp": 1799999660,
                },
                {
                    "price": 4008.4,
                    "timestamp": 1799999772,
                },
                {
                    "price": 4009.8,
                    "timestamp": 1799999884,
                },
            ],
            "window_close_timestamp": 1800000000,
            "window_open_price": 4000,
        },
    )
    print(res.status_code, res.text)