Domainr is a domain name search service with instant, per-keystroke search and context-aware suggestions for top-level domains. It is described as an ICANN-accredited domain status API provider with direct access to domain registry data. The Fastly Domain Research API checks whether a domain is available, premium-priced or for sale in a major aftermarket. Domainr is part of Fastly.
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Meilisearch is a search engine that indexes content and exposes it through search, conversational interfaces and APIs. It supports full-text search, semantic search and hybrid search, and can be used on the managed Meilisearch Cloud or self-hosted as an open source engine. Official SDKs are available for several programming languages and frameworks.
PublicWWW is a source code search engine that searches HTML, JavaScript, CSS and plain text in web page source code, supporting queries such as regex and ccTLDs. It also offers an API and an MCP server for AI assistants.
Qdrant is an open-source vector search engine written in Rust, providing fast and scalable vector similarity search with a convenient API. It supports metadata filters stored in JSON, hybrid search combining dense and sparse vectors, and multivector retrieval. It is available as the Qdrant Vector Search Engine, Qdrant Cloud, and Qdrant Hybrid Cloud.
searchcode.com is an MCP server providing structured code intelligence for LLMs, with six specialized tools to analyze, search and retrieve code from public git repositories. It is free during beta with no signup or API key.
DNSlytics is an online investigation tool for viewing information about IP addresses, domain names and providers. It offers DNS lookups, email testing, WHOIS lookups, and reports on AS/BGP, CIDR and TLD data. Premium website access and a premium API provide additional page views, monitors and data.
Libraries.io is a free service that collects publicly available open source package information scraped from the internet. Users can search packages by license or language and explore new, trending or popular packages. The data is not validated, corrected or curated for accuracy. API access is free to registered users, subject to a rate limit.
Merklemap is a subdomain and certificate transparency search engine. It collects Certificate Transparency data by live tailing CT logs and indexing certificates, and offers a web interface, an API, and a CLI for searching subdomains and SSL/TLS certificates.
OmniRoute by Cheaper Inference is an open-source AI router that routes requests across providers through one OpenAI-compatible endpoint, with automatic fallback. It accepts OpenAI, Claude, Gemini and Responses API requests at /v1 and ships as a self-hosted gateway with a local dashboard. The catalog covers chat, media, search, local runtimes and cloud agents.
ZincSearch is a search engine that provides full text indexing capability. It ships as a single binary with an embedded web UI for querying data, and offers compatibility with Elasticsearch APIs for data ingestion and Elasticsearch DSL for querying. It is schema-less, with authentication and aggregation and highlight support. The project is in Pre GA status.