Heurist Mesh FRED Macro Series Snapshot

Use this endpoint when you need a quick, single-series snapshot of the newest macro data point alongside its predecessor and change metrics — ideal for fast economic pulse checks, alert triggers, or feeding derived change signals into downstream analysis. Prefer this over the multi-pillar regime summary when you need granular point-in-time data for one specific series rather than a broad cross-pillar narrative.

• Unsupported or unrecognized macro series identifier returns an error or empty result
• FRED source data temporarily unavailable causes fetch failure
• Malformed request body missing required series field returns validation error
• Rate limiting or payment failure (x402) blocks the request
• Series has not been updated recently, so latest and previous readings may reflect older data