Mercor AI Interview: Questions, Rules and How to Prepare (2026)

The short answer: the Mercor AI interview is a recorded video interview with an AI interviewer. Most take about 20 minutes, and the questions are generated from your résumé and the job description. It’s the only screening Mercor offers: there are no human, phone or chat interviews instead. You can take a free practice interview as often as you like. Official interviews can be retaken up to three times across all your applications, but each retake resets your application progress and hiring managers can see the count. You may not use large language models to write your answers. So the best preparation is knowing every line of your résumé, practicing your answers out loud, and setting up a quiet room with Chrome, a camera and a microphone.

Everything about Mercor below comes from its own help center and published reporting, with sources at the end.

Disclosure: Huru is made by Beatview, Inc., which also makes Beatview, an AI recruiting agent that recruitment agencies use to run AI video interviews. We’re not affiliated with Mercor.

The Mercor AI interview at a glance

How the Mercor AI interview works

You apply to a listing, and the application asks you to complete an AI interview. Some roles also include forms or a cognitive or task-based assessment. In the interview, an AI interviewer asks role-specific questions, transcribes your answers and evaluates your performance. Mercor says it uses the video, audio and transcript of official interviews to assess candidates and recommend profiles to employers, and that in certain instances human contractors help assess interview or matching performance. You’re notified if your application moves to the next stage.

If you’ve already completed an interview that another listing also requires, Mercor reuses it instead of asking again. That’s convenient, but it also means one weak interview can follow you to several applications, which is why the retake rules matter (more below).

What the Mercor AI interview asks

Mercor doesn’t publish a fixed question list, because the questions are generated from your résumé and the listing. Expect four kinds:

1. Your background. A walk-through of your experience and why you’re applying.
2. Deep dives into your résumé. What you actually did on a project, the decisions you made, and the results, with numbers.
3. Domain questions. Questions about the field the listing is for, whether that’s software, medicine, law, finance or writing.
4. A problem to reason through. Mercor suggests having paper, a pen and, where relevant, a calculator ready, and some interviews require screen sharing, so be ready to work something out.

Mercor also asks candidates not to share specific interview questions or screenshots. So the practice questions below aren’t leaked questions: we wrote them to match the kinds of questions Mercor describes.

Practice questions

Background

• “Walk me through your background and what you’re working on now.”
• “Why are you interested in this project?”
• “Which part of your experience is most relevant to this role?”

Deep dives into your résumé

• “Tell me about the project on your résumé you’re proudest of. What exactly was your part?”
• “You mention [a result]. How did you measure it?”
• “What was the hardest decision you made on that project, and what would you do differently?”
• “Tell me about a time you found an error in someone else’s work.”

Domain questions (examples by field)

• Software: “How would you review a pull request that works but is hard to read?”
• Medicine: “A patient’s symptoms don’t fit the most likely diagnosis. How do you reason through it?”
• Law: “How would you explain the difference between two similar legal standards to a non-lawyer?”
• Finance: “How would you sanity-check a valuation model someone else built?”
• Writing: “How do you judge whether an explanation is clear for its audience?”

Problems to reason through

• “Estimate a number you can’t look up, and explain each assumption.”
• “Here are two answers to the same question. Which is better, and why?”
• “Find the mistake in this short piece of work and explain how you’d fix it.”

For each one, answer in a clear order: the point first, then the evidence, then the result. STAR (situation, task, action, result) works well for the stories; our STAR method guide has examples. If you’re judging two answers, say what criteria you’re using before you pick one.

How to prepare, step by step

1. Match the listing to your résumé. For each requirement, find the line on your résumé and the story behind it.
2. Re-read every line of your résumé. The questions come from it, so be ready to explain any claim, number or tool on it. If you can’t talk about something for two minutes, rewrite it or remove it.
3. Prepare three to five stories you can adapt: a project you led, a hard problem, a mistake you caught, a disagreement, and a time you learned something fast. Our tell me about yourself guide helps with the opening.
4. Take Mercor’s free practice interview. It isn’t tied to an application, doesn’t affect future opportunities and isn’t shared with companies, so use it to get used to the format.
5. Practice out loud with follow-up questions. Reading answers in your head isn’t the same as saying them to an interviewer who probes. A mock interview with a live AI interviewer is the closest thing to the real format.
6. Set up your room the day before. Use a computer, not a phone, since some interviews require one. Use the latest Chrome, test your camera and microphone, and ideally wear headphones with an external microphone. Keep your full face visible, find a quiet space, and have paper, a pen and a calculator ready. If screen sharing is required, only full-screen sharing works.
7. During the interview, keep talking. Mercor warns that long silences may prompt the AI to speak. If you need a moment, say so (“Let me think about that for a second”) and think out loud.

The rules on AI use

Mercor is strict about this, and it’s worth reading the policy rather than guessing:

• In the AI interview: you must not use large language models to write your responses.
• In assessments: unless a task explicitly allows it, using AI tools breaks Mercor’s LLM Usage Policy. Some assessments disable copy and paste, and sharing screenshots or templates is prohibited.
• On projects: the LLM Usage Policy allows grammar and wording checks, and subtle edits to phrasing and tone if the ideas and structure stay yours. It prohibits using models to evaluate the quality of model responses, to write justifications or explanations, or to predict code behavior. Mercor says submissions that are evidently produced by AI will be flagged.

Practicing beforehand is preparation; what the rules control is how you produce your answers in the interview and your work. If you practice with any tool, including Huru, close it before you start.

Retakes: use them carefully

You can retake an official interview up to three times across all your applications. A retake resets your application progress, and hiring managers can see how many times you’ve retaken. Mercor’s waiting room asks you to save retakes for technical problems, and an attempt that ends much earlier than its planned length doesn’t count.

So treat your first official attempt as the one that counts. Use the free practice interview for warm-ups, and if something breaks (your microphone dies, the page crashes), report it to Mercor support with a screenshot or recording, the interview name, and your operating system and browser.

Is Mercor legit?

Yes, Mercor is a real company with real work, but it’s worth knowing the full picture.

• It’s a large, funded company. In October 2025 TechCrunch reported that Mercor raised $350 million at a $10 billion valuation. It connects AI labs with domain experts who help train AI models, had more than 30,000 experts on its roster and was paying contractors more than $1.5 million a day.
• It had a data breach in 2026. On March 31, 2026, Mercor confirmed it had been targeted, and it said the breach was the result of a hack of the open-source tool LiteLLM. A hacker group claimed to have taken 4 TB of data, including candidate profiles. Mercor hadn’t said whether that data was authentic. By early April, five contractors had filed lawsuits over the alleged exposure of their personal data, and Wired reported that Meta paused its contracts with Mercor. Mercor said it was investigating and would communicate with customers and contractors directly. That’s as of TechCrunch’s report on April 9, 2026.
• What it says about your data. Mercor says it doesn’t sell interview or résumé data, doesn’t use your interview data to train external AI models, and lets you delete your account and data, including your interview and transcript, from Account Settings. It can’t do that while you have an active contract, a payout in process or an unanswered offer, and it may keep data where the law requires.

Two practical rules apply to any platform like this. Apply only through the company’s own site. And never pay to get work: the FTC says honest employers will never ask you to pay to get a job.

Practice with a live AI interviewer, free

For more on AI-run interviews, see our guides to AI interviews, how AI interview scoring works and video interview practice. Applying to micro1 too? Our micro1 AI interview guide compares the two.

Frequently asked questions

Sources

• Mercor help center: AI Interview, Assessments, LLM Usage Policy and How Mercor Uses AI and Data. Read on 8 November 2026.
• TechCrunch, Mercor quintuples valuation to $10B with $350M Series C, 27 October 2025. Read on 8 November 2026.
• TechCrunch, After data breach, $10B-valued startup Mercor is having a month, 9 April 2026. Read on 8 November 2026.
• Federal Trade Commission, Job Scams. Read on 8 November 2026.