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The Ultimate API for Deep Research

Production‑grade deep research & citations in one call. The same engine that powers Fay.

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Features

Accuracy Over Hype

We trade raw speed for rigor, because your users notice bad data, not millisecond latency.

Quality Check Pipeline

Every output passes multi‑layer validation before you ever see it.

Cited Facts

No black‑box answers. Each insight is tied to its origin.

Leads the Pack

Out‑performs OpenAI, Perplexity, etc. on depth, completeness, and format.

One Endpoint, Infinite Research

Your query in → formatted output, async delivery, and private data in. No extra endpoints.

Upload files effortlessly with our intuitive drag-and-drop interface, streamlining your workflow.

Flexible Output Format

Return structured JSON, ready‑to‑paste Markdown, or CSV. Just set `output_format`.

Webhook Ready

Just supply a `callback_url`; Fay pings you with the full payload when it’s done.

Bring Your Own Sources

Not just external, mount internal data instantly via MCP or direct OAuth integrations.

Integrations

Connect Data In and Data Out

Use Fay’s engine on your proprietary content or trigger research inside the tools you already automate with.

Connect effortlessly with popular third-party apps, expanding functionality and enabling smooth workflows between tools you already use.

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Frequently Asked Questions

All the essentials you need before integrating Fay’s live research engine.

What exactly is the Deep Research API?

A single-endpoint, async API that turns any plain-language query into structured, citation-backed research using the same engine that powers Fay’s AI coworker.

What exactly is the Deep Research API?

A single-endpoint, async API that turns any plain-language query into structured, citation-backed research using the same engine that powers Fay’s AI coworker.

What exactly is the Deep Research API?

A single-endpoint, async API that turns any plain-language query into structured, citation-backed research using the same engine that powers Fay’s AI coworker.

How is it different from ChatGPT wrappers or flat data vendors?

Fay crawls the live web, links dozens of public & private signals, runs a multi-layer quality-check pipeline, and returns fully cited output—no frozen CSV dump or black-box answer.

How is it different from ChatGPT wrappers or flat data vendors?

Fay crawls the live web, links dozens of public & private signals, runs a multi-layer quality-check pipeline, and returns fully cited output—no frozen CSV dump or black-box answer.

How is it different from ChatGPT wrappers or flat data vendors?

Fay crawls the live web, links dozens of public & private signals, runs a multi-layer quality-check pipeline, and returns fully cited output—no frozen CSV dump or black-box answer.

Can the API push results back to me when they’re ready?

Yes. Provide a callback_url and Fay will POST the payload to your webhook the moment validation passes.

Can the API push results back to me when they’re ready?

Yes. Provide a callback_url and Fay will POST the payload to your webhook the moment validation passes.

Can the API push results back to me when they’re ready?

Yes. Provide a callback_url and Fay will POST the payload to your webhook the moment validation passes.

What sources does Fay use by default?

The engine crawls live web pages, filings, job posts, tech-stack fingerprints, social chatter, review sites, and more, then cross-links them into one ranked output.

What sources does Fay use by default?

The engine crawls live web pages, filings, job posts, tech-stack fingerprints, social chatter, review sites, and more, then cross-links them into one ranked output.

What sources does Fay use by default?

The engine crawls live web pages, filings, job posts, tech-stack fingerprints, social chatter, review sites, and more, then cross-links them into one ranked output.

How do you ensure accuracy?

Every result goes through a multi-layer quality-check pipeline; each fact is tied to a citation you can audit.

How do you ensure accuracy?

Every result goes through a multi-layer quality-check pipeline; each fact is tied to a citation you can audit.

How do you ensure accuracy?

Every result goes through a multi-layer quality-check pipeline; each fact is tied to a citation you can audit.