Human Reference Atlas Tools
Usage analytics for the HRA portal tools derived from Amazon CloudFront access logs. Covers Nov 2023 – Apr 2026 · 5 tools · 128 countries.
78.0% human traffic is unusually clean for a public scientific API — industry average for open endpoints is 40–60%.
416.7K AI-bot requests — LLM training crawlers are actively indexing HRA's open biomedical ontology and atlas data.
Each tracked visit fires ~156 HTTP requests — JS bundles, fonts, API calls, map tiles. CDN volume alone badly overstates actual user engagement.
KG Explorer captures 62.6% of all visits despite launching just months ago — reshaping the tool landscape faster than any prior release.
From 15.81M Requests to 78.9K Tool Visits
4-level flow: all CloudFront traffic → traffic type → tracked vs. infra → individual tools
Flow widths use sqrt-normalized scaling so thin links remain visible. Hover any node or link for exact counts. Tool Visits tooltip shows per-tool breakdown. “Infra Requests” = images, JS, CSS, fonts & API calls — the 156× overhead behind every tracked visit.
Total Visits by Tool
Cumulative page visits per HRA tool, Nov 2023 – Apr 2026
Traffic Breakdown
15,810,917 total CloudFront requests
When Are Users Active?
Traffic distribution by hour of day — human CloudFront requests, all sites
Peak 8 AM–4 PM EST · 9 AM–5 PM EDT(top row EST · bottom row EDT)
9 AM EST · 10 AM EDT = single-hour peak
Monthly Unique Users
Distinct sessions per month across all HRA tools · 7 months of session data
Interaction Types Across All Tools
172,819 total logged interactions across all HRA tools
Where Are Clicks and Hovers Happening?
Top 15 UI elements per interaction type · tab totals show full event counts · color = tool for non-error events
Showing top 15 paths/messages covering 14,471 of 60,663 click events.
EUI visits spiked from 171 → 7,140HC in March 2024 — a 41× jump. Probably an internal HuBMAP/HRA training session (no public record found).
RUI opacity controls used only 262 times total across 5,548 visits — a powerful but buried feature.
KG Explorer launched Aug 2025 and hit 16,302 visits/mo by Mar '26 — now the most-visited HRA tool with 49,358 total visits.
GTEx Portal generates 2.01M API calls to HRA — the largest external consumer, ahead of HubMAP (1.65M).