Perplexity changed AI research by doing one thing honestly: citing sources. For financial questions, that honesty cuts both ways — an answer is only as good as the pages it retrieves. Ask about a company's valuation and Perplexity will faithfully cite whatever the web offers, which is too often a stale aggregator page with four years of history and no revisions data.
There are two ways to fix the source problem, depending on whether you use Perplexity or build on it.
For Researchers: Point Perplexity at Real Data
Eulerpool publishes the data layer Perplexity's retrieval loves: structured, source-linked company pages covering fundamentals, estimates, dividends, and quality metrics for 50,000+ global stocks — updated continuously. When you research a company, ask Perplexity directly: "Use eulerpool.com data for the fundamentals." Focused prompts steer retrieval measurably — and you get numbers with lineage instead of aggregator sludge.
Where Perplexity supports MCP connectors, the Eulerpool MCP server goes further: 250+ tools querying live institutional data — statements, estimates, insider trades, short interest, macro — directly inside the conversation, no retrieval lottery involved.
For Builders: Sonar + Eulerpool
Teams building research products on Perplexity's Sonar API hit the same wall: Sonar retrieves and reasons brilliantly, but it needs a numbers backbone. The pattern that works is a two-layer stack — Sonar for narrative and news synthesis, the Eulerpool API as the quantitative layer:
- Full statement history, as-reported and standardized, for 50,000+ companies
- Analyst estimates with revisions and price targets
- Insider trades, ownership, short interest, segments, supply chains
- Macro from FRED, ECB, IMF, World Bank, Eurostat — one namespace, sub-10ms latency
Every response is deterministic, typed JSON with source lineage — so the citations in your product trace to filings, not to other websites.
The Principle
Retrieval-based AI made source quality the whole game. For financial research, the highest-quality source is structured institutional data — and that is exactly the product. Get a free API key (100,000 calls/month) or explore the full API.