Whatnot is a live-stream shopping marketplace, and YouTube interest for the keyword whatnot printed 73 the week of September 12 2026. That is up 37.74% from 53 on September 5 and up 19.67% from 61 on August 15, per Trends MCP get_growth on youtube pulled September 17 2026. The 261-week get_time_series on the same source runs from September 18 2021 (first print 1) through September 12 2026 and peaked at 100 on August 29. The latest 73 sits 27% below that peak, 14 days later. Google Search for whatnot is 78 on September 12, down 4.88% over 7 days and down 14.29% over 30 days from 91, so search is not the move. The 1-year YouTube print is +356.25% from 16 on September 13 2025.
About whatnot
Whatnot is a live-stream shopping marketplace founded in 2019 by Grant LaFontaine and Logan Head in Marina Del Rey, California, with the slogan Shop, Sell, Connect, where sellers auction goods on camera after the company started as a Funko Pop marketplace and added live shows in 2020. Wikipedia says sellers moved $3 billion via live sales in 2024, then more than $8 billion in 2025, with sports and TCG cards as the top United States categories that year.
TechCrunch covered a January 2025 Series E of $265 million at nearly $5 billion. CNBC dated a $225 million Series F to October 2025 at $11.5 billion, then a $545 million Series G led by Iconiq, Lightspeed, and Avra to August 7 2026, at $20 billion. That CNBC piece also says more than 650,000 people join each week and that Whatnot claims roughly 60% of a live-commerce market valued at more than $22 billion. TIME listed the company among its 100 Most Influential Companies in April 2026.
What the time series shows
YouTube interest for whatnot printed 73 on September 12 2026, two weeks after a 100 peak on August 29, up 38 percent from 53 on September 5 and up 20 percent from 61 on August 15, on a curve a stranger can read after the spike. Last eight weekly prints are 33, 36, 43, 61, 69, 100, 53, and 73. Closest 90-day point is 31 on June 13 (+135.48%). Same week of the year: 16 on September 13 2025, 6 on September 14 2024, 4 on September 16 2023.
The chart window starts September 14 2024. 2024 prints sit between 6 and 8. 2025 spends most weeks at 12 to 16. 2026 opens at 20 on January 3, touches 31 on February 14 and 42 on June 20, then 33, 36, 43, 61, 69, and 100 across July and August before the 53 and 73 prints. 73 is a bounce off the 53 trough, not a new high. Week-over-week percent-change sample standard deviation on the last 52 weeks is 17.00%.
Why the page charts YouTube
A live-auction marketplace people watch should be tracked on a video source first, and YouTube for whatnot clears the 7-day +20% bar while Google Search for the same keyword falls on both the 7-day window and the 30-day window from a 78 print. Google Search for whatnot is 78 on September 12, down 4.88% from 82 on September 5 and down 14.29% from 91 on August 15. The 7-day print fails +20%. The 30-day print fails +25%. YouTube has 261 weekly points from 2021-09-18 through 2026-09-12, a 37.74% 7-day gain, and a 356.25% 1-year gain that is still far above last September even after the August 29 peak.
The App Store Top Free board listed Whatnot: Shop, Sell, Connect at rank 40 as of 2026-09-17T04:01:37Z. Nearby free apps on the same pull: Vinted at 2, Depop at 8, Temu at 20, Whatnot at 40. YouTube neighbors on the same date tell a split story. ebay live is +33.33% over 30 days (9 to 12). vinted is +15.09% (53 to 61). tiktok shop is +14.29% (56 to 64). depop is 81 and falling 12.9%. poshmark is 32, down 13.51%. Whatnot is the live-auction query that printed a new high in August, then gave back 47 points in a week, then recovered 20 points the next Saturday.
The Trends MCP calls for this keyword
get_time_series with source youtube and keyword whatnot is the call behind the chart, returning 261 weekly points from 2021-09-18 through 2026-09-12 stored as {date, value} with no smoothing, which is the only series this page is allowed to quote. get_growth on the same pair, windows 7D, 30D, and 1Y, is the headline math: 53 to 73 (+37.74%), 61 to 73 (+19.67%), and 16 to 73 (+356.25%). Those tools have to share a source. Mixing the Google Search 78 with the YouTube 73 would invent a story the APIs do not tell. get_top_trends on App Store Top Free supplies the rank-40 context. The YouTube trends source page documents the 0-100 weekly index. The App Store Top Free API page is the board that still has Whatnot inside the top 50 free apps.
A copy-paste pair for Claude or Cursor:
get_time_series source="youtube" keyword="whatnot"
get_growth source="youtube" keyword="whatnot" percent_growth=["7D","30D","1Y"]
REST is the same body at https://api.trendsmcp.ai/api with Authorization: Bearer and mode set to get_time_series or get_growth.