Cover-design data, on the page.
The Jacket Index™ is the most comprehensive archive-sourced rating of cover designers, publisher in-house design departments, design awards, and freelance platforms in the world. Available as a RESTful API and bulk-export feed for literary agencies, publishers, design schools, design-trade press, and serious cover-buyers.
Who uses the Jacket Index.
Designer Selection Brief
Before sending manuscripts out for design, run the cover-designer roster against the index. Subscore depth lets agents brief authors on track record beyond reputation.
Design Department Benchmark
Map your in-house design department on the same matrix as Knopf, FSG, Penguin Press. Identify subscore gaps and competitive position.
Cover Designer Diligence
Before agreeing to a publisher's proposed cover designer, run their subscore profile. Documented Composition, Concept, and Commercial Performance data.
Curriculum Reference
The canonical reference for cover-design history + contemporary practice. Indexed designers, archived covers, methodology citation.
Editorial Reference
Citation-grade data for cover-design coverage. Subscore breakdowns, award histories, public-record event timelines for every rated entity.
Designer Vetting
Curated-designer-marketplace operators can underwrite designer-quality with documented subscore profiles cross-referenced with platform-internal data.
Three tiers.
Research
- Quarterly index snapshot (CSV + JSON)
- Full 5-subscore breakdown for all entities
- Editorial timelines
- Email digest of grade changes
- Annual Jacket Index PDF report
- Citation rights for editorial use
Institutional
- Everything in Research
- RESTful API access (10,000 queries/mo)
- Real-time grade-change webhooks
- Historical 8-quarter time series
- Custom watchlists by designer / department
- Composition / Concept subscore deep-dive data
- Quarterly briefing call with editorial team
- White-label embed widget
Enterprise
- Everything in Institutional
- Unlimited seats & API queries
- Daily refresh (vs. quarterly)
- Custom subscore weighting models
- Bespoke designer / department deep-dives
- On-site editorial-design briefings
- SLA + dedicated account team
- Co-branded research reports
API technical specifications.
REST + JSON. Bearer-token auth. Rate limits per tier. Sandbox environment available for Institutional+ on request.