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the last 365 days of daily data for a supported FRED economic series (rates, CPI, GDP, energy, housing, etc.)","exampleAgentPrompt":"Can you pull the last 365 days of the 10-year Treasury yield (DGS10) from FRED so I can see the full year trend?","exampleUseCases":[{"title":"Year of CPI inflation trend","prompt":"Can you grab the last 365 days of CPI data from FRED so I can see how inflation has moved over the past year?"},{"title":"Full year mortgage rate history","prompt":"I'd like to see 12 months of 30-year fixed mortgage rate data from FRED — can you pull that so I can chart how rates have changed?"},{"title":"Crude oil price backtesting","prompt":"Can you fetch the last year of WTI crude oil prices from FRED so I can run some backtesting on how energy prices have trended?"}],"resultDescription":"A time series of daily data points for the requested FRED series covering the last 365 days, including dates and corresponding values for indicators such as DGS10, FEDFUNDS, CPIAUCSL, UNRATE, MORTGAGE30US, GDP, DCOILWTICO, SOFR, and others.","failureModes":["Missing or invalid 'id' query parameter returns an error — must be one of the 24 supported FRED series IDs","Unsupported series ID not in the allowed enum returns a validation error","Payment not provided or rejected causes a 402 Payment Required response","Series with lower publication frequency (e.g. GDP, MSPUS) may return fewer than 365 actual data points since those are released quarterly or monthly","Network timeout or upstream FRED data unavailability may cause 5xx errors"],"whenToPreferThis":"Use this endpoint when you need a full year (365 days) of historical data for a supported FRED economic series — ideal for trend analysis, charting, backtesting, or computing year-over-year changes. Prefer the /api/series/30 or /api/series/90 endpoints when you only need recent data and want to minimize cost. Use the /api/current endpoint when only the latest single value is needed. Use /api/date when you need a point-in-time value on a specific past date.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T12:57:15.771Z","isFirstParty":false}