**Provider I’d choose: Tavily.** This repo is a Python `langgraph`/LangChain product-research agent. The graph already has a `search_agent` node wired in, but [src/nodes/search_agent.py](/home/user/worktrees/attempt-13b985c7-b96c-4337-b9e6-ed4524fde8fe-cap-0/src/nodes/search_agent.py:5) is still a stub, and [AgentState](/home/user/worktrees/attempt-13b985c7-b96c-4337-b9e6-ed4524fde8fe-cap-0/src/graph/state.py:13) expects product records with `price`, `ratings`, and `url`. The best fit is a model-agnostic search/retrieval API that returns structured URLs plus clean page content, not just snippets. Tavily is the best managed provider here because its official `langchain-tavily` package supports Search, Extract, Map, Crawl, and Research, which fits the repo’s existing LangChain/LangGraph shape directly. Tavily Search returns JSON results with `title`, `url`, `content`, `score`, and optional `raw_content`; it also supports date filters, topics like `general`, `news`, and `finance`, domain filters, country boosting, and cleaned parsed HTML in markdown/text via `include_raw_content`. Its Extract tool can then retrieve clean content from chosen URLs for review and product-detail grounding. Sources: Tavily Search API docs, Tavily LangChain docs, Tavily pricing docs. ([docs.tavily.com](https://docs.tavily.com/documentation/api-reference/endpoint/search)) ([docs.tavily.com](https://docs.