{"uid":"cap_VFRiXCo1jTAtAMvQ9Debn","slug":"fathom-macroeconomic-data-api-popular-series-509fd7d0","name":"Fathom Macroeconomic Data API — Popular Series","description":"Free macroeconomic data API powered by FRED. 816,000+ economic time series. GDP, inflation, unemployment, interest rates, and more.","url":"https://fathom-opal.vercel.app/api/popular","method":"POST","headers":{},"bodySchema":null,"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.04","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"registry","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":"$0.04/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.04","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.04","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_HvEE4tYeodpCjq63-NypW","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.04","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns a curated list of the most popular macroeconomic time series (GDP, inflation, unemployment, interest rates) sourced from the FRED database","exampleAgentPrompt":"Can you pull up the most popular macroeconomic data series available — things like GDP, inflation, and unemployment — so I can see what economic indicators are most commonly tracked?","exampleUseCases":[{"title":"Macro dashboard starting point","prompt":"I'm building an economic dashboard — can you fetch the most popular FRED economic series so I know which indicators like GDP growth, CPI, and unemployment rate to display first?"},{"title":"Investment research data discovery","prompt":"I need to do some macro research for my investment thesis — what are the most popular economic time series I should be looking at, like interest rates and inflation metrics?"},{"title":"Economics report data sourcing","prompt":"I'm writing a macroeconomic report and need to know which economic indicators people track most — can you get me a list of the top FRED series covering things like GDP, employment, and price levels?"}],"resultDescription":"A list of the most popular macroeconomic time series from the FRED database, each likely including the series ID, name, description, units, frequency (e.g. monthly/quarterly), and a popularity or relevance signal — covering categories such as GDP, CPI inflation, unemployment rate, federal funds rate, and other widely tracked U.S. economic indicators.","failureModes":["Payment failure: x402 payment of 0.04 USDC not processed, returns 402 Payment Required","Service unavailable: Vercel deployment offline, returns 503","FRED upstream outage: underlying data provider unavailable, returns 502 or timeout","Empty response: no popular series returned if data pipeline is stale"],"whenToPreferThis":"Choose this endpoint when you need a curated starting set of macroeconomic indicators without knowing specific series IDs — ideal for bootstrapping dashboards, exploratory macro research, or letting an agent discover the most relevant economic time series before drilling into specific data. Prefer over raw FRED API access when you want a pre-filtered popular list via a simple paid call rather than navigating FRED's full 800k+ series catalog.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T12:32:01.258Z","isFirstParty":false}