About the Sponsorship Index

The Sponsorship Index is a public record of paid brand sponsorships mentioned in YouTube videos: which brands appear on which channels, in which category, and when we last saw it. It is published by MerchSage.

How it is built

  1. We sample recent uploads from YouTube channels and fetch their public transcripts.
  2. A language model reads each transcript and extracts the sponsorships it can name, recording the brand, a product category, where in the video it ran, and a confidence rating.
  3. Only high- and medium-confidence mentions of a named brand are published. Unnamed or uncertain mentions stay out of the index.

Transcript text, discount codes and affiliate links are not part of the published index — they are not fields of the table this site reads. Coverage is a sample, not a census: a channel missing from the index has not been sampled, and no sponsorship listed here implies any affiliation between the brand, the creator and MerchSage.

Public API

Every page here is backed by an anonymous, uncredentialed JSON API on api.merchsage.com:

  • GET /api/public/sponsorships/stats — index size and freshness
  • GET /api/public/sponsorships/brands — brand list (q, category, paged)
  • GET /api/public/sponsorships/brands/{slug} — one brand and its creators
  • GET /api/public/sponsorships/creators/{handle} — one creator and its sponsors
  • GET /api/public/sponsorships/categories and /categories/{slug}
  • GET /api/public/sponsorships/search — free-text search
  • GET /api/public/sponsorships/export — the whole index, flat

Requests are rate-limited per IP. Please cache what you fetch.

Use it from Claude

The same data is served as an MCP server, so an assistant can query the index directly:

claude mcp add --transport http sponsors https://api.merchsage.com/mcp/sponsors

It exposes four tools: search_sponsorships, get_brand, get_creator and list_categories. No authentication.

Getting listed, corrected or removed

Listings come from sampling, not submissions — there is no way to ask for a channel to be added. If something here is wrong, or you are a creator or brand who wants an entry removed, email support@merchsage.com with the page URL. We remove on request, without asking why.

Who publishes this

MerchSage is an AI merch manager for YouTube creators: it designs a merch collection around a channel and runs the shop. The index is a by-product of the channel research that work needs. Learn more at merchsage.com.

Index by MerchSage — sampled from public YouTube videos.