polls.karbach.digital

Live 402 challenge

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

{
  "docs": "https://api.polls.karbach.digital/v1/",
  "x402": "https://x402.org",
  "asset": "USDC",
  "error": "payment_required",
  "network": "Base",
  "project": "Ein Projekt von Karbach.Digital (https://karbach.digital)",
  "price_usd": 0.02,
  "free_trial": "Try before you pay: put /try in front of any paid path (for example https://api.polls.karbach.digital/try/v1/federal/trend). Same answer, no payment, 3 calls per day per IP address.",
  "how_to_pay": "This endpoint is paid per call via x402. Read the PAYMENT-REQUIRED header, pay with an x402 client (for example the x402 Python or TypeScript SDK) and repeat the request.",
  "description": "French presidential election 2027, first round: poll average, 95 percent band and runoff chance per candidate, most likely runoff pairs, recent campaign events. Unavailable during the legal blackout (Saturday 00:00 until 20:00 on election day, Paris time: 17 to 18 Apr and 1 to 2 May 2027)."
}

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": "0x6d8444CaEd95D9155785Da10aC00247948957D61",
    "amount": "20000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET"
      },
      "output": {
        "type": "json",
        "example": {
          "data": {
            "events": [
              {
                "date": "0000-00-00",
                "text": "Bruno Retailleau est désigné candidat des Républicains (LR) par les adhérents du parti"
              },
              {
                "date": "0000-00-00",
                "text": "Fabien Roussel, secrétaire général du Parti communiste français (PCF), officialise sa candidature"
              }
            ],
            "election": "Présidentielle 2027",
            "first_round": "2027-04-18",
            "second_round": "2027-05-02",
            "reference_field": [
              "Arthaud",
              "Attal"
            ],
            "days_to_first_round": 0,
            "first_round_forecast": [
              {
                "ci95": [
                  0,
                  0
                ],
                "name": "Arthaud",
                "party": "LO",
                "median": 0,
                "p_first": 0,
                "p_runoff": 0,
                "party_name": "Lutte ouvrière",
                "poll_average": 0
              },
              {
                "ci95": [
                  0,
                  0
                ],
                "name": "Attal",
                "party": "RE",
                "median": 0,
                "p_first": 0,
                "p_runoff": 0,
                "party_name": "Renaissance",
                "poll_average": 0
              }
            ],
            "runoff_pairs_probability": {
              "Candidate A vs Candidate B": 0
            }
          },
          "docs": "https://api.polls.karbach.digital/v1/",
          "model": {
            "method": "weighted poll average of the last 45 days (half-life 10 days), scenario closest to the most polled field, Monte Carlo with errors measured in 2017 and 2022",
            "polls_used": 0
          },
          "notice": "Scenario analysis based on published opinion polls. Not a prediction and not a voting recommendation. Coalition figures count simulated seat majorities (see ...",
          "source": {
            "polls": "French polling institutes; every poll is filed with the Commission des sondages (link per poll)",
            "license": "CC BY-SA 4.0 (share alike, because the poll compilation is CC BY-SA)",
            "blackout": "French law (Loi 77-808, art. 11, as amended 2016) bans publishing polls from the Saturday before each round, 00:00, until polls close on election day, 20:00 ...",
            "processing": "polls.karbach.digital (Max Karbach)",
            "calibration": "poll average vs official results 2017 and 2022 at the same distance to election day",
            "compilation": "fr.wikipedia.org, Liste de sondages sur l'élection présidentielle française de 2027 (CC BY-SA 4.0)",
            "polls_license": "ODbL 1.0",
            "polls_license_url": "https://opendatacommons.org/licenses/odbl/1-0/"
          },
          "project": "Ein Projekt von Karbach.Digital (https://karbach.digital)",
          "updated_at": "0000-00-00T00:00:00",
          "uncertainty": "95 percent band per candidate; error sd = 1.787 x sqrt(share), taken from the 2017 and 2022 poll errors at this distance to election day"
        }
      }
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method"
          ],
          "properties": {
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "GET",
                "HEAD",
                "DELETE"
              ],
              "type": "string"
            },
            "queryParams": {
              "type": "object",
              "properties": {}
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object"
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog

2026-10-21 22:08Z

Last indexed by Roundhouse

2026-10-26 17:20Z

Last enriched (probe, favicon, geo)

2026-10-21 23:15Z

x402 version

2

Max timeout

300s

Liveness probe

HTTP 402