Grounding OpenAI responses in trusted data with the Bigdata Search Service
September 2025•Oscar Sanchez Iglesias, Senior Product Manager, Bigdata API
Discover how Bigdata’s real-time financial search engine empowers OpenAI to deliver responses that are accurate, current, and grounded in trusted market data.
OpenAI models are undeniably powerful, but when it comes to financial research and market analysis, they can sometimes rely on outdated training data or generate hallucinations. That’s why OpenAI offers the capability to configure specialised tools to complement their capabilities and become proficient in any field.
Bigdata has created a tool for OpenAI, enabling it to ground its responses in accurate, up-to-date, and trustworthy financial data: Bigdata Search Service.
What is Bigdata Search Service?
It’s a proprietary search engine that indexes millions of documents in real-time from over 13,000 trustworthy financial sources. It does an excellent job of detecting entities (companies, people, organizations, products, and places) and the events in which those entities are involved.
Let’s take the most powerful Search Engine, Google, which is focused on general context and oriented towards an advertising business model. Unlike it, Bigdata Search Engine is laser-focused on financial data and oriented to retrieve the most novel and accurate information to support financial research.
How does it work?
We can configure the OpenAI Responses API to leverage the Bigdata Search Service using the Model Context Protocol (MCP) as a tool.
Given an input text and the permission to use the tool, the OpenAI model will automatically issue queries to Bigdata Search Service until it has enough relevant data to respond.
For example, suppose you ask the model to list the analysts who participated in NVIDIA’s most recent earnings call. In that case, the answer is no longer a guess based on historical patterns: it’s a precise, structured list grounded in the actual transcript.
OpenAI, together with Bigdata Search Service, becomes the perfect financial assistant, delivering accurate, market-ready intelligence.
This advancement marks a new chapter in the application of AI across equity research, risk analysis, and financial decision-making. When you ground OpenAI responses in Bigdata’s trusted financial content, you can ensure every answer is more reliable, current, and actionable.
Get started today with the Bigdata Search Service for OpenAI.