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Metaphor API

Freemium
search apineural searchaideveloper toolllmragnatural language processingapicontent discovery

An API for developers to build applications with neural search capabilities, allowing them to find high-quality, relevant content by understanding natural language queries rather than just matching keywords.

Try it out

Metaphor provides a powerful API that enables applications to perform "neural search," a more intuitive and human-like way of finding information online. It's designed for developers who need to integrate high-quality, content-aware search beyond simple keyword matching. The service processes natural language prompts to find relevant links, returning clean HTML and metadata for easy integration into LLM-powered agents and other data-driven tools. Its unique value lies in its model, which is trained to predict the next link a person would find useful, resulting in higher signal results than traditional search engines. This makes it ideal for building sophisticated research, discovery, and autonomous agent applications.

Pros

  • Neural search model provides higher relevance and better content discovery than traditional keyword-based search.
  • Returns clean, LLM-ready HTML content from URLs, simplifying data extraction.
  • Powerful filtering capabilities by date, domain, and specific included/excluded links.
  • Simple and well-documented API with official client libraries for Python and TypeScript.
  • Generous free tier with 1,000 API calls per month, ideal for development and small projects.

Cons

  • Search queries can have higher latency compared to traditional search engine APIs.
  • Pricing can become expensive for high-volume applications.
  • The search index may be less comprehensive and updated less frequently than giants like Google or Bing.
  • The concept of 'neural search' requires a different approach to query-crafting than developers are used to.

Key features

  • Neural Search from natural language prompts
  • Find Similar Links based on a source URL
  • Get Content from any URL, returning clean HTML
  • Advanced Date and Domain Filtering
  • Official Python SDK
  • Official TypeScript/JavaScript SDK
  • Content Highlights and Keyword Extraction

Integrations

LangChainLlamaIndexPythonNode.jsREST APIAI AgentsRAG (Retrieval-Augmented Generation) Systems

Target audience

Developers, AI engineers, and product teams building applications that require advanced search capabilities, such as AI agents, research tools, RAG pipelines, and content discovery platforms.

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Founded

2022

Headquarters

San Francisco, USA

Pricing Tiers

Basic

1,000 API calls per month and 50 search results per day. For hobbyists and developers getting started.

Free

Launch

20,000 API calls per month, with additional calls at $5 per 1,000. Includes higher rate limits (10 searches/second).

$100/mo

Scale

For high-volume needs, offering custom API call limits, dedicated support, and enterprise features. Requires contacting sales.

Custom

Frequently Asked Questions

Top Alternatives to Metaphor API

Google Custom Search API

Choose this if you need access to Google's massive, up-to-the-minute index and prefer a traditional, keyword-based search approach.

You.com API

A strong alternative for building AI chat applications, as it provides search results along with conversational AI and app integrations.

Brave Search API

A competitor focused on privacy and an independent index, offering specific features for RAG that may be better for certain privacy-sensitive applications.

Bing Search API

Often a more cost-effective choice than Google for large-scale, traditional keyword-based search with a comprehensive web index.

Ready to get started?

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