Search & Discovery APIs let you add search & discovery-powered capabilities without building from scratch. Every entry below is profiled with trust signals — pricing model, authentication requirements, CORS support, rate limits, and live uptime checks — so you can compare options and pick production-safe choices instead of guessing from a link list.
| API | Pricing | Auth | CORS | Health | |
|---|---|---|---|---|---|
| APIs.guru Wikipedia for Web APIs, OpenAPI/Swagger specs for public APIs | Free | No | No | Profile | |
| Algolia Search API Index records and deliver fast keyword, semantic, faceted, and personalized search. | Freemium | API Key | Yes | Profile | |
| Apollo.io API B2B people and company discovery plus engagement data. | Unknown | Unknown | Yes | Profile | |
| Archive Wayback API API for Internet Archive's Wayback Machine | Unknown | Unknown | Yes | Profile | |
| Autom Our SERP API delivers lightning-fast Google search results at unbeatable prices. Built for developers who need reliable, scalable access to search data without the complexity of web scraping or CAPTCHA challenges. | Freemium | API Key | No | Profile | |
| Brave Search API An index of billions of pages in a single call | Freemium | API Key | No | Profile | |
| Crunchbase API Company, funding and people data for discovery and enrichment. | Unknown | Unknown | Yes | Profile | |
| DataForSEO SERP API SERP, backlink, keyword and business data APIs at pay-as-you-go scale. | Unknown | Unknown | Yes | Profile | |
| Diffbot Knowledge Graph API Entity extraction and knowledge-graph search from the web. | Unknown | Unknown | Yes | Profile | |
| DomainDb Info Domain name search to find all domains containing particular words/phrases/etc | Freemium | No | No | Profile | |
| Exa Search API Neural web search and content API for AI agents, RAG, research, crawling, and structured web data retrieval. | Freemium | API Key | No | Profile | |
| Google Knowledge Graph API Entity search across Google's Knowledge Graph. | Unknown | Unknown | Yes | Profile | |
| Hunter API for domain search, professional email finder, author finder and email verifier | Freemium | API Key | No | Profile | |
| Kagi Search API Privacy-focused web search API from Kagi. | Freemium | API Key | Yes | Profile | |
| Linkup API Real-time web search and source-grounded results API for AI agents. | Freemium | API Key | Yes | Profile | |
| Meilisearch API Fast open-source search engine API for full-text, typo-tolerant, faceted, and geo search. Self-hosted or managed cloud; scoped search keys safe for frontend use. | Freemium | API Key | Yes | Profile | |
| Mojeek Search API Independent-index web search API, privacy-focused and Google-free. | Unknown | Unknown | Yes | Profile | |
| OpenAPIHub API marketplace and management platform for discovering, testing, and integrating APIs. Provides API gateway, analytics, and developer portal tools. | Freemium | API Key | No | Profile | |
| Owler API Search for information on companies using a website or company name and get access to Company Data, News, Blog Posts, Competitor Lists and much more. | Unknown | Unknown | Yes | Profile | |
| Parallel AI Search API Evidence-backed research-agent search with provenance on every result. | Unknown | Unknown | Yes | Profile | |
| People Data Labs API Person and company enrichment from billions of records. | Unknown | Unknown | Yes | Profile | |
| Pinecone Vector Database API Managed vector database API for embeddings storage, similarity search, hybrid search, and reranking. x-api-key header authentication against index-specific hosts. | Freemium | API Key | No | Profile | |
| Proxycrawl Proxycurl API People, company and LinkedIn-profile data APIs. | Unknown | Unknown | Yes | Profile | |
| SERP Rank Checker Check realtime Google SERP Rank of any keywords | Freemium | API Key | No | Profile | |
| ScraperAPI API ScraperAPI API for proxy-based web scraping: rotate residential proxies, solve CAPTCHAs, and render JavaScript with automatic retry and geo-targeting. | Freemium | API Key | No | Profile | |
| Search Services API API for Internet Archive's Search-related services | Unknown | Unknown | Yes | Profile | |
| SearchApi Real-Time Google SERP API | Freemium | API Key | No | Profile | |
| SerpApi SerpApi: search engine results parsing for Google, Bing, YouTube, Amazon, and 40+ search engines. | Freemium | API Key | Yes | Profile | |
| SerpApi - Search API SerpApi's Search API makes it easy and fast to scrape Google and other search engines | Paid | API Key | No | Profile | |
| Serper.dev API Fast, low-cost Google SERP API built for AI agents. | Unknown | Unknown | Yes | Profile | |
| Tavily API Search, extract, crawl, map, and research API built for AI agents and RAG workflows. | Freemium | API Key | No | Profile | |
| TinyFish API Agentic search plus extraction and page operation, including gated sites. | Unknown | Unknown | Yes | Profile | |
| Typesense Search API Open-source typo-tolerant search engine API for instant search, filtering, geo search, and semantic search. Self-host free or use Typesense Cloud. | Freemium | API Key | Yes | Profile | |
| VisageCloud API Face search, recognition & classification API. Just make a call to our REST API each time your app needs to access face recognition and classification capabilities. | Unknown | Unknown | Yes | Profile | |
| Visual Search Client API Visual Search API lets you discover insights about an image such as visually similar images, shopping sources, and related searches. The API can also perform text recognition, identify entities (people, places, things), | Unknown | Unknown | Yes | Profile | |
| Wayback API Internet Archive Wayback Machine availability API. | Paid | Unknown | Yes | Profile | |
| WolframAlpha API Computational answers, facts and data via the WolframAlpha API. | Unknown | Unknown | Yes | Profile | |
| You.com API Search and answer APIs built for AI applications and agents. | Freemium | API Key | Yes | Profile |
Start with pricing and auth: free tiers and no-auth APIs are fastest to prototype with. Then check CORS if your app calls the API from the browser, and health before you commit — a great search & discovery API that's been down for a week will block your launch. Each profile below shows all of these signals plus rate limits where documented.