{"uid":"cap_nB1Koub5XT1F00QMdKU4I","slug":"ecb-fx-rate-historical-series-e98e173b","name":"ECB FX Rate Historical Series","description":"","url":"https://x402.professorsausages.com/fx-rates/history","method":"POST","headers":{},"bodySchema":null,"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","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":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_ZfKBRYxY9PohZ2w7eYmxA","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns a per-pair historical fixing series over a date range (daily, weekly, or monthly) with min, max, avg, and percent-change stats, covering ECB reference rates back to 1999.","exampleAgentPrompt":"Can you pull the monthly EUR/USD ECB fixing series from January 2020 to December 2023, including the min, max, average, and percent change over that period?","exampleUseCases":null,"resultDescription":"Returns an array of [fixingDate, rate] data points for the specified currency pair and interval, plus aggregate stats (min, max, avg, first, last, changePct) over the requested date range, and metadata about the rate type (ecb-daily-reference) and data source.","failureModes":["Unsupported currency pair (not covered by ECB fixings) returns an error or empty points array","Invalid date range (e.g. before 1999 or future dates) may return empty or partial results","Malformed interval value (not daily/weekly/monthly) causes a validation error","Network or payment authorization failure returns a 402 or 5xx error"],"whenToPreferThis":"Choose this endpoint when you need a time-series of ECB official reference rates for a specific currency pair over a date range, with aggregated statistics. Prefer it over single-rate lookups when you need trend analysis, volatility stats, or charting data. It complements the single-date cross-rate endpoint when historical depth or interval aggregation is required.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T00:44:15.154Z","isFirstParty":false}