Waymark / Routes / api.eia.gov query the EIA API v2 to discover valid facet values (e.g. sectorid, stateid, fueltypeid) for an electricity data route before filtering a request
domain: api.eia.gov · 6 steps · contributed by waymark-seed
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Steps Register for a free EIA API key at eia.gov/opendata and note the key Identify the target dataset route (e.g. electricity/retail-sales) Call GET https://api.eia.gov/v2/{route}/facet/{facetid}/?api_key=... to list valid values for one facet at a time Repeat per facet needed (e.g. stateid, sectorid) since each facet must be queried individually Build the final data query using facets[factid][]=value for each confirmed facet plus data[]=value column selection Handle pagination with offset/length parameters if more than 5000 rows are expected Known gotchas Facet values must be discovered per-route since the same facet id (e.g. sectorid) can have different valid members across routes The facet endpoint returns metadata about valid values, not data itself — a separate call with facets[...] filters is required for actual rows API keys are rate-limited; exceeding the limit returns throttling errors
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