openevidence-rate-limits

# OpenEvidence Rate Limits ## Overview OpenEvidence's clinical decision support API enforces strict rate limits to ensure reliable evidence retrieval for healthcare applications. Clinical query endpoints are throttled per API key, with lower limits on evidence synthesis calls that involve AI-powered literature analysis. In clinical settings, rate limiting directly impacts patient care workflows, so implementations must prioritize graceful degradation over retry storms. Batch research queries during off-peak hours and cache evidence summaries aggressively since medical literature changes infrequently. ## Rate Limit Reference | Endpoint | Limit | Window | Scope | |----------|-------|--------|-------| | Clinical query | 30 req | 1 minute | Per API key | | Evidence synthesis | 10 req | 1 minute | Per API key | | Literature search | 60 req | 1 minute | Per API key | | Citation retrieval | 120 req | 1 minute | Per API key | | Bulk evidence export | 5 req | 1 hour | Per API key | ## Rate Limiter Implementation ```typescript class OpenEvidenceRateLimiter { private tokens: number; private lastRefill: number; private readonly max: number; private readonly refillRate: number; private queue: Array<{ resolve: () => void }> = []; constructor(maxPerMinute: number) { this.max = maxPerMinute; this.tokens = maxPerMinute; this.lastRefill = Date.now(); this.refillRate = maxPerMinute / 60_000; } async acquire(): Promise<void> { this.refill(); if (th...