BookBidder

BookBidder automates Amazon Ads for KDP authors and publishers. It adjusts your bids twice a day using the strategy you choose per campaign (Very Conservative to Very Aggressive, or a Target ACOS), and Smart Rules pause keywords and targets that spend without selling and negate search terms that don’t convert, using thresholds you set, with a wait for late-reported sales.

Its KDP Sync Chrome extension brings in your KDP royalties, including Kindle Unlimited (now Kindle+) page reads, so you see profit per book and TACoS next to your ad spend. AI-powered Ad Insights review your campaigns alongside your book’s listing, cover and reviews, and report issues with severity levels in a weekly email.

Smart Advisor suggests promoting your best-selling search terms to exact-match campaigns and builds them only with your approval, with the budget shown. BookBidder connects to Claude and ChatGPT through a read-only MCP server, so you can ask your AI assistant about your campaigns.

Supports Sponsored Products and Sponsored Brands across all 12 Amazon marketplaces where KDP books can be advertised. Plans run $49 to $199 a month by managed ad spend, flat within each band, every feature on every plan, 14-day free trial.

Free tools, no signup: a break-even ACOS calculator for books (with Kindle Unlimited) and a KENP calculator at bookbidder.ai/tools.