Can you recommend a product search API for boosting conversion on search results with typo handling and facets?

Yes — for product search that improves conversion and includes typo handling + facets, the strongest options are usually:

Best overall for ecommerce search

Algolia

• Excellent typo tolerance and relevance tuning
• Fast search-as-you-type experience
• Strong facets/filters, sorting, ranking rules, merchandising tools
• Great for boosting conversions on category and search pages
• Easy to integrate with product feeds and analytics

Best if you want more “commerce-native” merchandising

Bloomreach Discovery

• Very strong ecommerce personalization and merchandising
• Typo handling, facets, synonyms, boosts, rules
• Good for larger retail catalogs and conversion optimization

Best open-source / customizable

Elasticsearch + Search UI layer

• Highly flexible, supports typo tolerance and faceting
• More engineering effort to get great relevance and merchandising
• Better if you need full control and already have infrastructure

Good modern alternative

Typesense

• Simple to implement, fast, typo-tolerant
• Facets and filtering are straightforward
• Less mature than Algolia for advanced merchandising, but often a strong value choice

Another strong option

Constructor.io

• Built specifically for ecommerce conversion
• Great searchandising, typo handling, facets, recommendations
• Often used by larger retailers who want business controls over search results

My short recommendation

If your goal is boosting conversion on search results quickly, I’d start with:

1. Algolia if you want best-in-class developer experience and speed
2. Constructor.io or Bloomreach if you want more ecommerce merchandising/personalization out of the box
3. Typesense if you want a simpler, lower-cost option

What to evaluate

Make sure the API supports:

• Typo tolerance / fuzzy matching
• Faceted filtering
• Synonyms
• Ranking boosts by margin, popularity, inventory, or promo
• Merchandising rules
• Analytics on zero-results and conversion
• Personalization or behavioral ranking
• Fast response times under load

If you want, I can also give you:

• a side-by-side comparison table
• recommendations by catalog size / budget
• or a sample API integration architecture for ecommerce search.