ChainReaction for AI assistants

Add it

• Claude — Settings → Connectors → Add custom connector, paste the URL above. No sign-in step: it connects straight away.
• Claude Code — claude mcp add --transport http chainreaction https://chainreactionhq.com/api/mcp
• ChatGPT, Cursor and other MCP clients — add a remote MCP server and paste the URL. Anything that supports Streamable HTTP without authentication works.

Then ask

• “What's the best thing to order at Culver's?”
• “Whopper or Big Mac — which do people actually rate higher?”
• “Which chain has the best fries?”
• “What's the worst-rated item at Taco Bell?”
• “Which fast food chain has the best menu overall?”

Every answer carries the rating count and a link to the item, chain or report page, so you can check it. The assistant is told to say when an item has too few ratings to call.

The tools

• search_items — find items by name, optionally within one chain
• get_item_score — one item's CR Score, tier, rating count, star average and rank in its chain
• compare_items — two items head to head, from any chains — scores, winner, margin, comparison page
• chain_rankings — every item at one chain ranked, plus the chain's standing against other chains
• best_in_category — the top items in a category — fries, nuggets, chicken sandwiches, desserts — sitewide or at one chain
• census_summary — the 2026 Fast Food Census in numbers: chains ranked, best and worst items, CSV link, how to cite

What the numbers are

The CR Score is the share of an item's ratings at 3.5 stars or higher, smoothed toward the sitewide average and shown 0–100. Fire is 75 and up, Solid 50–74, Skip under 50. An item needs 5 ratings to be scored and 25 to be ranked against items from other chains; a chain is ranked against other chains once 80% of its catalogued menu has a score. Ratings come from paid survey panels of U.S. consumers, members and anonymous visitors. How the score works →

The server answers from a snapshot of the catalog refreshed hourly, so it is never more than an hour behind the site. It is the same data as the pages — nothing is available here that isn't public there.

Terms

Free to use, including commercially, with attribution and a link to ChainReaction (CC BY 4.0 — the same licence as the 2026 Fast Food Census). Scores change as ratings arrive; quote the rating count with the score and the date you pulled it. There is no rate limit today; if you are building something that will call it heavily, say hello first.

Other ways in

• The whole dataset as a CSV: /reports/fast-food-census-2026/data.csv
• A plain-text guide to the site for language models: /llms.txt
• schema.org structured data on every item, chain, ranking and comparison page.

Contact

hello@chainreactionhq.com — for a chain you want scored, a tool you wish existed, or anything the server gets wrong.