Constituencies

{
  "data": {
    "constituency": 299,
    "members": [
      {
        "name": "Esra Limbacher",
        "party": "SPD"
      },
      {
        "name": "Michael „Moses“ Arndt",
        "party": "Die Linke"
      }
    ],
    "name": "Homburg",
    "result_btw2025": {
      "erst": {},
      "zweit": {
        "AfD": 23.7,
        "BSW": 5.8,
        "CDU/CSU": 26.1,
        "FDP": 4.2,
        "Grüne": 6.6,
        "Linke": 6.7,
        "SPD": 22
      }
    },
    "scenario_2029": {
      "erst": {
        "AfD": {
          "ci_high": 35.8,
          "ci_low": 26.5,
          "pct": 31.2
        },
        "BSW": {
          "ci_high": 1,
          "ci_low": 0,
          "pct": 0
        },
        "CDU/CSU": {
          "ci_high": 24.7,
          "ci_low": 17.7,
          "pct": 21.2
        },
        "FDP": {
          "ci_high": 4.7,
          "ci_low": 1.9,
          "pct": 3.3
        },
        "Grüne": {
          "ci_high": 7.6,
          "ci_low": 4.2,
          "pct": 5.9
        },
        "Linke": {
          "ci_high": 9.8,
          "ci_low": 6,
          "pct": 7.9
        },
        "SPD": {
          "ci_high": 31.7,
          "ci_low": 23.2,
          "pct": 27.4
        }
      },
      "zweit": {
        "AfD": {
          "ci_high": 36.9,
          "ci_low": 27.3,
          "pct": 32.1
        },
        "BSW": {
          "ci_high": 5.6,
          "ci_low": 2.6,
          "pct": 4.1
        },
        "CDU/CSU": {
          "ci_high": 19.9,
          "ci_low": 13.9,
          "pct": 16.9
        },
        "FDP": {
          "ci_high": 5.5,
          "ci_low": 2.5,
          "pct": 4
        },
        "Grüne": {
          "ci_high": 11,
          "ci_low": 7,
          "pct": 9
        },
        "Linke": {
          "ci_high": 10.6,
          "ci_low": 6.6,
          "pct": 8.6
        },
        "SPD": {
          "ci_high": 21.4,
          "ci_low": 15.2,
          "pct": 18.3
        }
      }
    },
    "similar_constituencies": [
      {
        "bundesland": "SL",
        "name": "St. Wendel",
        "similarity": 0.982,
        "wk_nr": 298
      },
      {
        "bundesland": "SL",
        "name": "Saarlouis",
        "similarity": 0.978,
        "wk_nr": 297
      }
    ],
    "state": "SL",
    "structure": {
      "abitur_pct": 32.7,
      "alo_quote": 6.6,
      "alo_quote_frauen": 5.9,
      "alter_60_74_pct": 22.2,
      "alter_u18_pct": 15.7,
      "auslaender_pct": 13.9,
      "bev_dichte": 444.8,
      "bip_je_ew": 39444,
      "einkommen_je_ew": 23126,
      "flaeche_km2": 550.2,
      "land": "Saarland",
      "pkw_je_1000": 661.6,
      "wk_name": "Homburg",
      "wk_nr": 299
    },
    "swing_type": "regional"
  },
  "docs": "https://api.polls.karbach.digital/v1/",
  "model": null,
  "notice": "Scenario analysis based on published opinion polls. Not a prediction and not a voting recommendation. Coalitions are arithmetic majorities only, not statemen...",
  "project": "Ein Projekt von Karbach.Digital (https://karbach.digital)",
  "source": {
    "polls": "dawum.de",
    "polls_license": "ODbL 1.0",
    "polls_license_url": "https://opendatacommons.org/licenses/odbl/1-0/",
    "processing": "polls.karbach.digital (Max Karbach)"
  },
  "uncertainty": "scenario_2029 projects the federal trend onto the constituency (uniform swing with corrections).",
  "updated_at": "2026-10-18T15:28:17.464793"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://api.polls.karbach.digital/v1/constituencies/:nr'

# 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 - 'https://api.polls.karbach.digital/v1/constituencies/:nr' \
  | 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 $0.02 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.02" });
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 $0.02 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.polls.karbach.digital%2Fv1%2Fconstituencies%2F%3Anr
const res = await pay("https://api.polls.karbach.digital/v1/constituencies/:nr");
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 $0.02 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.02"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://api.polls.karbach.digital/v1/constituencies/:nr")
    print(res.status_code, res.text)