ToolVet
80trust / 100

Night Lights Econ

by space.halowerk.com in Markets & finance

x402 APIPassing, checked 2 h ago

Fits ordinary least squares to log radiance by year, converts the slope to annual radiance change, and applies a caller-supplied economic elasticity. Night lights are an imperfect proxy affected by sensors, saturation, electrification, outages, policy, and conflict; this is not an official economic statistic or causal estimate.

POST https://space.halowerk.com/v1/night-lights-econ

Last 30 days

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Status and outage history · Atom feed

Uptime
100%
Response time
135 ms typical, 182 ms slowest 5%
Last check
2 h ago
Next check
any minute now

How to call it

POST https://space.halowerk.com/v1/night-lights-econ

Each call costs $0.003 in USDC on Base, paid with the request over x402.

Run a free test callOne unpaid request, the way an agent sends it. You see the payment challenge it gets back. Nothing is charged.

Example request

From the listing.

POST https://space.halowerk.com/v1/night-lights-econ
content-type: application/json

{
  "base_economic_index": 100,
  "economic_elasticity": 0.65,
  "observations": [
    {
      "mean_radiance": 18.4,
      "year": 2022
    },
    {
      "mean_radiance": 19.1,
      "year": 2023
    },
    {
      "mean_radiance": 20,
      "year": 2024
    },
    {
      "mean_radiance": 20.6,
      "year": 2025
    }
  ]
}

Parameters

ParameterTypeRequiredDescription
base_economic_indexnumberYes
economic_elasticitynumberYesPercent economic-index change per percent radiance change under the caller model.
observationsarray of objectYes

Example response

The listing has no example response.

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.003.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://space.halowerk.com/v1/night-lights-econ' \
  -H 'content-type: application/json' \
  --data-raw '{"base_economic_index":100,"economic_elasticity":0.65,"observations":[{"mean_radiance":18.4,"year":2022},{"mean_radiance":19.1,"year":2023},{"mean_radiance":20,"year":2024},{"mean_radiance":20.6,"year":2025}]}'

# 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://space.halowerk.com/v1/night-lights-econ' \
  -H 'content-type: application/json' \
  --data-raw '{"base_economic_index":100,"economic_elasticity":0.65,"observations":[{"mean_radiance":18.4,"year":2022},{"mean_radiance":19.1,"year":2023},{"mean_radiance":20,"year":2024},{"mean_radiance":20.6,"year":2025}]}' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode
JavaScript: pay and call
// 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%2Fspace.halowerk.com%2Fv1%2Fnight-lights-econ&method=POST
const res = await pay("https://space.halowerk.com/v1/night-lights-econ", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "base_economic_index": 100,
    "economic_elasticity": 0.65,
    "observations": [
      {
        "mean_radiance": 18.4,
        "year": 2022
      },
      {
        "mean_radiance": 19.1,
        "year": 2023
      },
      {
        "mean_radiance": 20,
        "year": 2024
      },
      {
        "mean_radiance": 20.6,
        "year": 2025
      }
    ]
  }),
});
console.log(res.status, await res.text());
Python: pay and call
# 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://space.halowerk.com/v1/night-lights-econ",
        json={
            "base_economic_index": 100,
            "economic_elasticity": 0.65,
            "observations": [
                {
                    "mean_radiance": 18.4,
                    "year": 2022,
                },
                {
                    "mean_radiance": 19.1,
                    "year": 2023,
                },
                {
                    "mean_radiance": 20,
                    "year": 2024,
                },
                {
                    "mean_radiance": 20.6,
                    "year": 2025,
                },
            ],
        },
    )
    print(res.status_code, res.text)

Security scan

  • No findings. We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

Recent checks

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2 h agoPassed402102 ms$0.003
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