{"uid":"cap_jYLLVCP8fgKT6izHTmFkO","slug":"polls-karbach-digital-german-federal-polls-historical-series-9f957aa7","name":"polls.karbach.digital – German Federal Polls Historical Series","description":"Weekly federal polling average, up to 24 months. Use when asked how party support developed over months. Source-attributed, German data, updated every six hours.","url":"https://api.polls.karbach.digital/v1/federal/history?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"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":{"months":{"type":"integer","default":12,"maximum":24,"minimum":1}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"data":{"months":2,"series":[{"average":{"AfD":27.9,"BSW":3.4,"FDP":4.4,"SPD":12.2,"Linke":11.7,"Grüne":14.3,"Union (CDU/CSU)":21},"week_ending":"2026-08-17","polls_in_window":13},{"average":{"AfD":28,"BSW":3.2,"FDP":4.7,"SPD":12.3,"Linke":11.6,"Grüne":14.1,"Union (CDU/CSU)":20.9},"week_ending":"2026-08-24","polls_in_window":15}],"window_days":21},"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":"2026-10-18 11:20:02","uncertainty":"Plain average of all institutes in a 21-day window, no house-effect correction."}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.05","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.05/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_3VG2wdKvAifF4B3TLCsda","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.05","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns a weekly time-series of German federal poll averages (party vote shares) over a configurable look-back window of 1–24 months","exampleAgentPrompt":"Can you pull the German federal polling time series for the last 6 months and show me how each party's weekly average has changed, especially AfD and the Union?","exampleUseCases":[{"title":"Tracking AfD support trend","prompt":"Show me how AfD's polling numbers have moved week by week over the past 12 months in Germany — I want to see if support is growing or plateauing."},{"title":"Pre-election party comparison","prompt":"Pull the last 3 months of German federal poll averages so I can compare where SPD, CDU/CSU, and the Greens are sitting right now versus two months ago."},{"title":"Long-term coalition math monitoring","prompt":"Get me 24 months of weekly German poll averages for all parties — I need to see which coalition combinations have been arithmetically viable over time."}],"resultDescription":"A JSON object containing a weekly series of 21-day rolling poll averages for all major German parties (AfD, SPD, Union CDU/CSU, Grüne, FDP, BSW, Linke), each entry including the week_ending date, per-party vote share percentages, and the number of polls included in that window. Also includes metadata: data source (dawum.de), license (ODbL 1.0), last-updated timestamp, and a disclaimer that results are a plain average with no house-effect correction and not a voting recommendation.","failureModes":["months parameter out of range (1–24): likely 400 or validation error","No polling data available for the requested time window: empty series array","Upstream dawum.de data unavailable: stale or missing data without explicit error","Service outage between 6-hour update cycles: slightly outdated data returned silently"],"whenToPreferThis":"Choose this endpoint when you need a structured, regularly updated (every 6 hours) historical time series of German federal poll averages with weekly granularity and configurable look-back window. Prefer it over raw polling databases when you want pre-aggregated 21-day rolling averages across all major parties without needing to normalise house effects yourself. Best for trend analysis, coalition arithmetic monitoring, and dashboards covering German federal politics.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-28T12:35:43.870Z","isFirstParty":false,"canonicalSlug":"polls-karbach-digital-german-federal-polls-historical-series-9f957aa7"}