What is the Mercor AI interview?

It is Mercor's standard screening step: a video interview, usually about 20 minutes, in which an AI interviewer asks role-specific questions, makes a transcript of your answers and evaluates them for the listing. Mercor does not offer human, chat or phone interviews instead.

Mercor is a real company that hires experts for human evaluation work for AI labs, and it publishes its candidate rules openly — the AI interview, ID verification, background checks and payments are all documented in its talent docs. An AI interview is how it screens everyone, not a warning sign. We are not affiliated with Mercor and cannot vouch for a specific listing: apply through mercor.com, read the contract and pay terms before you start, and never pay anyone to get hired.

How long is the Mercor AI interview?

Mercor says most interviews take about 20 minutes, and some are shorter or longer. You do not have to start it immediately — pick a time when you can sit somewhere quiet.

Can I retake the Mercor AI interview?

Yes, up to three times across all related applications, from the Assessments tab. A retake resets your application progress, hiring managers can see the retake count, and only the most recent attempt is evaluated. An attempt that ends far too early ("Interview too short") must be retaken and counts toward the limit.

Can I use ChatGPT or other AI during the Mercor interview?

Not to answer. Mercor's LLM Usage Policy allows AI for grammar and wording checks only, and work that is evidently AI-generated is flagged. Use AI before the interview, to rehearse — not during it.

Does Mercor have a practice interview?

Yes. The Practice Interview is free, can be taken as many times as you like, is not tied to any application and is not shared with companies.

How long does the Mercor background check take?

Mercor's documentation does not give a duration. It says the check runs once you are matched or start onboarding, is done by a third-party provider, and covers identity, criminal-record and watchlist screening (plus regulatory checks for some finance and legal roles); a failed check can lead to the offer being withdrawn.

Is Colloqa affiliated with Mercor?

No. Colloqa is an independent interview-practice tool. We describe the Mercor interview from Mercor's public documentation so you can prepare; our AI interviewer is not Mercor's and our questions are not Mercor's.

Mercor AI interview: how it works and how to prepare

Every Mercor application goes through the same first step: a roughly 20-minute video interview with Mercor's AI interviewer, about your experience in the field you applied for. Here is what that interview is, according to Mercor's own documentation, and how to rehearse it out loud before it counts.

Practise the Mercor interview out loud

Free: 1 full practice interview a day, no card.

Facts checked against Mercor's own pages on October 19, 2026

Colloqa is not affiliated with Mercor, and we have no inside knowledge of how its AI interviewer scores you. Every fact about the interview below comes from Mercor's own talent documentation, linked next to it. The example questions are ours, written to match the kinds of interviews Mercor describes — not Mercor's actual questions.

What the Mercor AI interview is

Mercor hires experts — physicians, lawyers, engineers, consultants and others — for human evaluation work for AI labs. Its AI interview is the standard and only way it screens applicants: there is no human, chat or phone alternative.

Format: A video interview with an AI interviewer: camera and microphone on, your face in frame, answers spoken out loud. Captions are on by default. It is in English unless the listing says otherwise. (source)
Length: Most interviews take about 20 minutes; some are shorter or longer. (source)
What is asked: Role-specific questions. Some interviews are technical and go deep into your prior experience; others test language or reasoning skills. Some include a whiteboard that saves automatically. (source)
Pauses and clarifying: If you stay silent for long, the AI may cut in — you can tell it you were not finished. You can ask it to repeat or clarify a question. (source)
Setup: A computer, not a phone. Chrome (latest) is recommended; Edge and Safari work; Firefox does not. The waiting room runs setup checks: a working microphone is required, and some interviews require sharing your entire screen (not a window or a tab). (source)
Using AI tools: Mercor's LLM Usage Policy allows AI for grammar and wording checks only — not for composing your answers, writing explanations, evaluating model responses or predicting what code does. Work that is evidently AI-generated is flagged. (source)
Retakes: Up to three retakes across all related applications, from the Assessments tab. A retake resets your application progress, hiring managers can see how many times you retook it, and only your most recent attempt is evaluated. (source)
After the interview: One interview covers every later application that needs the same interview. Mercor keeps the recording and an AI-generated transcript to evaluate you and recommend your profile to employers; you cannot download them. Mercor says it does not sell interview data or use it to train AI models. (source)

How the interview runs

You reach the interview step of an application. After you apply, a checklist appears — résumé, assessments, work authorization and, for most roles, the AI interview. You can start it whenever suits you; progress saves.
Setup checks in the waiting room. Microphone, camera, face in frame, lighting and — when the interview needs it — a full-screen share. The Start button stays grey until the required checks pass.
About 20 minutes with the AI interviewer. It asks role-specific questions and you answer out loud. Keep answers to the point: a long silence can make it cut in.
Submit the application. A confirmation shows the expected timeline. You are notified when the application moves to the next stage; only your latest interview attempt counts.
If you are matched: checks before the project. ID verification and, once you are matched or start onboarding, a background check by a third-party provider — before you sign and start work.

The kinds of questions to expect

Mercor describes interviews that dig into your experience and interviews that test language or reasoning. Below are examples of each kind — written by us, to practise with. Mercor's real questions differ by role.

Your experience, in depth

Checks that the expertise on your résumé is real — and that you can explain it.

Pick a project on your résumé and walk me through it. What was your part, specifically?
What was the hardest decision in that project, and what did you trade off?
How would you explain [a core concept in your field] to a smart person outside it?

Reasoning in your field

Mercor’s work is judging and improving AI answers in your domain, so expect to reason step by step.

An answer to a question in your field looks plausible but is subtly wrong. How would you spot it, and how would you explain the error?
Walk me through how you would solve [a typical problem in your field], step by step.
What is a common misconception in your field, and how would you correct it?

Language and communication

Some interviews test how clearly you express yourself in English, not only what you know.

Describe your current or most recent role in under two minutes.
Summarise a complicated piece of your work so that a client could act on it.
Tell me about a time you had to explain a mistake to someone senior.

Replace the brackets with your own field before you practise. The point is not to memorise answers but to get used to explaining your work out loud, clearly, without long pauses.

How to prepare for the Mercor AI interview

Take Mercor's free practice interview first. It is unlimited, not tied to any application and not shared with companies — the quickest way to see the real format and test your setup.
Prepare two or three projects you can explain in depth. Pick the ones closest to the role. For each: the problem, what you did yourself, the result and one thing you would do differently.
Keep answers brief, but do not go silent. Mercor advises short answers and no long pauses — a long silence can make the AI cut in. If it does, say you were not finished and carry on.
Ask it to repeat or clarify. You are allowed to. Answering the question you guessed is worse than asking once.
Set up like Mercor asks. Desktop Chrome, a quiet room, headphones with an external microphone, your face lit and in frame, pen and paper (and a calculator if your field needs one). Close everything you would not want on a shared screen.
Do not use an LLM to answer. Mercor's policy allows AI only for grammar and wording; AI-written work is flagged. The interview is about how you reason — let it show.
Save retakes for real problems. You have three across all related applications, they reset your application progress, and hiring managers see the count. Rehearse before the official attempt, not with it.

Mercor's free practice and practising with Colloqa

Mercor offers its own Practice Interview: free, as many times as you like, not linked to any application and not shared with companies. Do it — it is the real format, and it checks your camera, microphone and browser.

Colloqa is a different tool for the same goal: rehearsing an interview out loud with an AI interviewer that follows up on what you say. Use it for the parts a format check does not cover.

Your field and your résumé. Set up the interview for the role you applied for, or paste the job description, and the questions are built around it.
Follow-ups. The AI interviewer asks "why", "what exactly did you do" and "give me an example" when an answer is vague — the depth a technical interview pushes for.
Repetition. Run the same kind of interview until your stories come out clearly and without long pauses. The free plan is 1 full session a day, no card.
Feedback on how you answered. After each session: what worked, what fell apart and the one thing to drill next, plus a skill profile tracked across sessions. The detailed written feedback is part of the paid plan.
English practice. Mercor interviews are in English unless a listing says otherwise. Rehearse in your own language first, then switch to English — 12 languages are supported.

Rehearse the Mercor interview out loud today: one full practice session a day is free.

Practise with an AI interviewer

Mercor AI interview: questions candidates ask

It is Mercor's standard screening step: a video interview, usually about 20 minutes, in which an AI interviewer asks role-specific questions, makes a transcript of your answers and evaluates them for the listing. Mercor does not offer human, chat or phone interviews instead.
Mercor is a real company that hires experts for human evaluation work for AI labs, and it publishes its candidate rules openly — the AI interview, ID verification, background checks and payments are all documented in its talent docs. An AI interview is how it screens everyone, not a warning sign. We are not affiliated with Mercor and cannot vouch for a specific listing: apply through mercor.com, read the contract and pay terms before you start, and never pay anyone to get hired.
Mercor says most interviews take about 20 minutes, and some are shorter or longer. You do not have to start it immediately — pick a time when you can sit somewhere quiet.
Yes, up to three times across all related applications, from the Assessments tab. A retake resets your application progress, hiring managers can see the retake count, and only the most recent attempt is evaluated. An attempt that ends far too early ("Interview too short") must be retaken and counts toward the limit.
Not to answer. Mercor's LLM Usage Policy allows AI for grammar and wording checks only, and work that is evidently AI-generated is flagged. Use AI before the interview, to rehearse — not during it.
Yes. The Practice Interview is free, can be taken as many times as you like, is not tied to any application and is not shared with companies.
Mercor's documentation does not give a duration. It says the check runs once you are matched or start onboarding, is done by a third-party provider, and covers identity, criminal-record and watchlist screening (plus regulatory checks for some finance and legal roles); a failed check can lead to the offer being withdrawn.
No. Colloqa is an independent interview-practice tool. We describe the Mercor interview from Mercor's public documentation so you can prepare; our AI interviewer is not Mercor's and our questions are not Mercor's.