Roundhouse

polls.karbach.digital

Poll archive (federal and state), filter by date range and parliament, up to 500 per call. Use when you need many historic polls with fieldwork dates and sample sizes. Source-attributed, German data, updated every six hours.

DataLiveeip155:8453Exactvia cdp
https://api.polls.karbach.digital/v1/polls/archive
ElectionsGermanyPollsPoliticsBundestag
Calls · 30d
1
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 12 snapshots so far.
$2.19
Verified settled volume
105 settlements proven x402 by their on-chain EIP-3009 marker.
$0.050
Listed price
As published in the catalog. Always read the live 402 before paying.
1
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-10-18 14:02Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x6d8444CaEd95D9155785Da10aC00247948957D61

The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.

Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Provider

The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.

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": 0.05,
  "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": "Poll archive (federal and state), filter by date range and parliament, up to 500 per call."
}

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

0.05USDC≈ $0.05 USD
on Base · exact scheme

Pay 0.05 USDC on Base to 0x6d84…57D61. The signed payment is good for 5 minutes.

Paid to
0x6d84…57D61
USD Coin contract
0x8335…02913
Payment window
5 minutes
As published
50000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x6d8444CaEd95D9155785Da10aC00247948957D61",
    "amount": "50000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "from": "2026-09-01",
          "limit": 50,
          "parliament": "Bundestag"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "data": {
            "count": 2,
            "polls": [
              {
                "id": "4352",
                "method": "Telefon & Online",
                "results": {
                  "AfD": 29,
                  "BSW": 4,
                  "FDP": 4,
                  "SPD": 13,
                  "Linke": 11,
                  "Grüne": 14,
                  "Sonstige": 7,
                  "Union (CDU/CSU)": 18
                },
                "institute": "INSA",
                "published": "2026-10-17",
                "parliament": "Bundestag",
                "sample_size": 1206,
                "fieldwork_end": "2026-10-16",
                "commissioned_by": "BILD am Sonntag",
                "fieldwork_start": "2026-10-12"
              },
              {
                "id": "4349",
                "method": "Online",
                "results": {
                  "AfD": 30,
                  "BSW": 3.5,
                  "FDP": 4.5,
                  "SPD": 13.5,
                  "Linke": 10,
                  "Grüne": 14,
                  "Sonstige": 6,
                  "Union (CDU/CSU)": 18.5
                },
                "institute": "INSA",
                "published": "2026-10-13",
                "parliament": "Bundestag",
                "sample_size": 2006,
                "fieldwork_end": "2026-10-12",
                "commissioned_by": "BILD",
                "fieldwork_start": "2026-10-09"
              }
            ]
          },
          "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...",
          "source": {
            "polls": "dawum.de",
            "processing": "polls.karbach.digital (Max Karbach)",
            "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": "2026-10-18T12:15:01.438959",
          "uncertainty": null
        }
      }
    },
    "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": {
                "to": {
                  "type": "string",
                  "format": "date"
                },
                "from": {
                  "type": "string",
                  "format": "date"
                },
                "limit": {
                  "type": "integer",
                  "maximum": 500
                },
                "parliament": {
                  "type": "string"
                }
              }
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object"
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
2026-10-18 14:02Z
Last indexed by Roundhouse
2026-10-26 22:40Z
Last enriched (probe, favicon, geo)
2026-10-18 15:15Z
x402 version
2
Max timeout
300s
Liveness probe
HTTP 402
Report

Hand this page to an agent

Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.

GET api.roundhouseai.io/v0/endpoints

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 12 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.

Open skill.md
Show the prompt
Using Roundhouse, look up the x402 service polls.karbach.digital and tell me whether it is
worth paying: what a call costs, whether the endpoint answered when last probed, and what
its payment record actually shows.

curl -s 'https://api.roundhouseai.io/v0/endpoints?q=polls.karbach.digital'
curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>'

Then call it: read the price from the live 402 at https://api.polls.karbach.digital/v1/polls/archive, never from
a cached figure, and pay with an x402 client.

The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except
/v0/unified* and /v0/endpoints. Either pay over x402 (mint a personal key for $0.01 at
GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at
https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further.

If you do not have Roundhouse tools or skills installed, read
https://roundhouseai.io/skill.md first — it is the whole procedure.