--- title: Build a deep research tool | daily.dev description: A walkthrough of building a command-line deep research tool using the Browserbase SDK for web search and page fetching, combined with OpenAI for summarization.... canonical: https://daily.dev/posts/build-a-deep-research-tool-tmfhcopmn twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Build a deep research tool | daily.dev og:description: A walkthrough of building a command-line deep research tool using the Browserbase SDK for web search and page fetching, combined with OpenAI for summarization.... og:url: https://daily.dev/posts/build-a-deep-research-tool-tmfhcopmn og:image: https://api.daily.dev/og/posts/TmFHCOPMn.png og:image:alt: Build a deep research tool og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Build a deep research tool **[Aaron Francis](https://daily.dev/sources/aarondfrancis)** · 7 min read · 0 upvotes · 0 comments ## Summary A walkthrough of building a command-line deep research tool using the Browserbase SDK for web search and page fetching, combined with OpenAI for summarization. The tool searches the web via Browserbase's search API, fetches up to 30 unique URLs, deduplicates and diversifies sources, then summarizes findings into a markdown report. The TypeScript project is open source, configurable via environment variables, and costs roughly $1 per 1,000 pages fetched. The author also outlines a multi-loop agentic pattern where synthesis results feed back into new searches. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [How to Build Your Own Deep Research](https://daily.dev/posts/how-to-build-your-own-deep-research-kefeu6vfz) · PromptLayer Blog · 1 upvotes · 0 comments - [Build an AI Agent with Real-Time Web Search in JavaScript](https://daily.dev/posts/build-an-ai-agent-with-real-time-web-search-in-javascript-qcyztz206) · Amit Merchant · 5 upvotes · 0 comments - [Building a browser API in one shot](https://daily.dev/posts/building-a-browser-api-in-one-shot-ulgi5fqya) · Read the Tea Leaves · 42 upvotes · 0 comments --- [View this post on daily.dev](https://daily.dev/posts/build-a-deep-research-tool-tmfhcopmn) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Build a deep research tool","url":"https://daily.dev/posts/build-a-deep-research-tool-tmfhcopmn","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/build-a-deep-research-tool-tmfhcopmn"},"datePublished":"2026-03-24T16:00:24.742Z","dateModified":"2026-03-24T16:01:00.787Z","description":"A walkthrough of building a command-line deep research tool using the Browserbase SDK for web search and page fetching, combined with OpenAI for summarization....","image":"https://i.ytimg.com/vi/2NcLtWazHFU/sddefault.jpg","thumbnailUrl":"https://i.ytimg.com/vi/2NcLtWazHFU/sddefault.jpg","isAccessibleForFree":true,"articleSection":"Aaron Francis","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Aaron Francis","logo":"https://media.daily.dev/image/upload/s--K_v3T0Hp--/f_auto/v1733559692/logos/aarondfrancis","url":"https://daily.dev/sources/aarondfrancis"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/build-a-deep-research-tool-tmfhcopmn","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"","timeRequired":"PT7M","video":{"@type":"VideoObject","name":"Build a deep research tool","description":"A walkthrough of building a command-line deep research tool using the Browserbase SDK for web search and page fetching, combined with OpenAI for summarization....","thumbnailUrl":"https://i.ytimg.com/vi/2NcLtWazHFU/sddefault.jpg","uploadDate":"2026-03-24T16:00:24.742Z","duration":"PT7M","url":"https://api.daily.dev/r/TmFHCOPMn","embedUrl":"https://www.youtube.com/embed/2NcLtWazHFU"}} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Aaron Francis","item":"https://daily.dev/sources/aarondfrancis"},{"@type":"ListItem","position":3,"name":"Build a deep research tool"}]} ```