The Mercor AI interview is a recorded, role-specific conversation with an AI interviewer that most applicants finish in about 20 minutes. Mercor's own documentation says the AI generates questions from your résumé and the job description, transcribes your answers and evaluates your performance for the listing. You can retake an interview up to three times, hiring managers can see how many times you did, and only your most recent attempt counts. Every Mercor fact below comes from Mercor's talent documentation, checked in October 2026.
Take the assessment yourself and follow the employer's rules — use CoPilot Interview to practice beforehand. Mercor publishes explicit rules on AI tools, covered below, and this guide sticks to format and preparation. It does not list leaked questions, which Mercor asks candidates not to share.
How the Mercor AI interview works
| Detail | What Mercor's docs say |
|---|---|
| Interviewer | An AI interviewer asks role-specific questions, generates a transcript of your answers and evaluates your performance for the listing. |
| Where questions come from | Your résumé and the job description. |
| Length | About 20 minutes for most interviews; some are shorter or longer. |
| Language | English unless the listing says otherwise. Captions are on by default and can be turned off. |
| Content | Some interviews are technical and go deep into your prior experience; others test language or reasoning. Some include a whiteboard that saves automatically. |
| Reuse | You complete each unique interview once. If another application needs the same interview, your existing result carries over. |
| Timing | You don't have to start right away; choose a time that suits you. Listings can close, though, so don't wait too long. |
| Human alternative | None. Mercor says its AI interview is the standard and only screening method, and it can't be done by chat, call or another medium. |
| Transcript | Mercor doesn't share recordings or transcripts with candidates. |
To start, open your dashboard's Application tab, open the application and start the interview from its step list. Steps can be done in any order. Mercor keeps the video, audio and an AI transcript of official interviews to evaluate you and recommend your profile to employers; it says it doesn't sell interview data and doesn't share practice interviews with companies.
For how Mercor's format compares with HireVue and micro1, see our broader guide to how employer-side AI interviewers work.
Retakes: three attempts, and they're visible
- The limit. You can retake an interview up to three times across all applications that use it.
- How. On the Assessments tab, click Retake assessment on the interview card, pick a reason (technical issue, interrupted, just testing, improve performance, other, or different domain or language) and confirm. No support ticket is needed.
- The cost. A retake resets your application progress. The waiting room asks you to save retakes for technical issues and notes that hiring managers can see your retake count.
- Latest attempt wins. Mercor reviews only your most recent completed attempt, which replaces the earlier one. Retake only if you're confident you'll do better.
- Too short doesn't count. An attempt that ends much earlier than its planned length shows "Interview too short." You have to retake it, and that retake counts toward your limit.
The free alternative to burning retakes is Mercor's Practice Interview. Its docs describe it as free, not tied to any application, not affecting future opportunities, and repeatable as often as you like. If you don't see it on your dashboard, ask Mercor support before planning around it.
Résumé-driven questions: treat your résumé as the script
Because the AI builds questions from your résumé and the job description, your résumé decides much of what you'll be asked. Mercor's own requirements and advice:
- Format: PDF only, text-based rather than a scanned image, one to two pages, under 2 MB, with a simple layout and clear headings such as Education, Experience, Skills and Certifications.
- Content: three to five bullets per role that start with outcomes, two to four representative projects showing the problem, your role, the stack and the result, and core skills kept separate from tools you only use occasionally. Mercor discourages long keyword lists.
- Timing: a submitted application can't be edited, so update your résumé before you click Submit on new applications.
Then prepare as if every line will be questioned, because any of them can be. The table shows how we would expect a résumé line to turn into questions. These are examples we wrote, not Mercor's questions.
| Résumé line (example) | Questions to be ready for (examples we wrote) |
|---|---|
| "Cut API p95 latency 40% by adding a Redis cache" | What did you cache and for how long? How did you handle invalidation? How did you measure p95 before and after? |
| "Labeled and reviewed 2,000 clinical notes for model training" | What guidelines did you follow? How did you handle an ambiguous note? How was quality checked? |
| "Led migration of 30 services to Kubernetes" | What did you migrate first and why? What broke? What would you do differently? |
| "Python, SQL, Spark (daily); Rust (occasional)" | Walk through a recent Spark job you wrote. Why did you choose Python over Rust for it? |
For each bullet, prepare a 60-to-90-second story: the context, what you did, how you did it, the result and what you would change. Remove anything you can't explain under follow-up questions. If you're switching fields, our guide to answering "tell me about yourself" helps you frame a short summary of your background, which most interviews ask for early.
Domain assessments and work trials
Mercor also uses assessments alongside interviews, and its docs call them a primary entry point to the platform. They look at your domain expertise, how you approach real-world problems, how you follow instructions and handle ambiguity, and the quality and clarity of your written or spoken answers.
- Types: grouped into categories such as Data Type Assessments and Domain-Specific Assessments. Some roles add a cognitive or task-based assessment with a practice step first.
- Recommended assessments: appear only after you upload your résumé, up to two at a time. Passing one means you're considered for new roles that use it, even without a traditional application.
- Scoring varies: two listings can use the same assessment with different scoring and weighting.
- Single submission: most assessments allow only one submission and open read-only afterward.
- Timing: most have no strict time limit. Timed ones show the time on the start screen, and once started the timer can't be paused. Don't reload the page mid-assessment.
- Review and feedback: human reviewers may look at your work. Mercor support doesn't share scores, and feedback exists only for some assessments, in which case it arrives by email.
- Work trials: some offers include a work trial, a single paid assessment before an offer. Each person is eligible for only one, and deadlines are strict.
Mercor's rules on AI tools and sharing
Mercor's interview FAQ points to its LLM Usage Policy: you may check grammar and wording, but you should not use large language models to compose your responses, rate model responses, generate rationales or explanations, or evaluate code. Its assessment rules add that, unless an assessment explicitly says otherwise, you may not use AI or LLM tools to generate responses, copy external content, collaborate with others or repost assessment content. Some assessments disable copy and paste, and the policy says submissions that are evidently AI-produced will be flagged.
On sharing, you may talk about your general experience, but not specific questions, screenshots or confidential information about projects or clients.
Setup checklist for the Mercor interview
- Browser: latest Google Chrome is recommended; Edge and Safari are supported; Firefox and mobile browsers are not. Listings that need you to share your screen can only be done on a computer.
- Waiting-room checks: "Working mic" is required (test it by reading a phrase aloud), and so is sharing your entire screen, not a window or tab, when the interview needs it. Face in frame, good lighting, a sharp camera and a steady camera help the recording but don't block the start button. Play the test sound to check your speakers.
- Audio and room: headphones and an external microphone are recommended, in a quiet room with a stable connection.
- Materials: pen and paper, plus a calculator if the role calls for one.
- Permissions: in Chrome, click the lock icon in the address bar, allow the camera and microphone, then refresh.
If "Start interview" stays grayed out, a required check has failed or is still waiting. Allow camera and microphone access, select Restart devices and read the message under the button.
When something goes wrong
- The AI isn't responding: wait 30 to 60 seconds, refresh and rejoin, check your connection, clear Chrome's cache and cookies, and turn off VPNs, ad blockers and privacy extensions.
- It talks over you: keep answers brief and avoid long silences, since extended pauses can make the AI interject. If it interrupts, tell it you weren't finished. Ask it to repeat or clarify when needed.
- Your tab froze or you disconnected: reopen the Assessments tab and try again. If the session ended, retake it from the interview card.
- Still stuck: email support@mercor.com with your operating system and browser version, the interview name and application, and a screenshot or screen recording.
A 5-day prep plan
| Day | Focus | What you should have at the end |
|---|---|---|
| 1 | Fix your résumé to Mercor's format rules and the listing's wording | A text-based PDF and six to eight stories tied to its bullets |
| 2 | Mercor's Practice Interview, then the setup checks on your real device | No surprises about the waiting room, captions or the AI's pacing |
| 3 | A scored mock built from your résumé and the job description | Scores per answer and a list of weak spots |
| 4 | Domain refresh: explain your core concepts and past trade-offs out loud | Two-minute explanations you can give without notes |
| 5 | A short second mock focused on your weakest area, then rest | A calm first attempt at the official interview |
For day 3, CoPilot Interview's desktop Mock Interview builds the interview from your résumé and a job description. You choose the level, 3, 5 or 8 questions, the mix of behavioral, technical, system design and coding, and an optional focus. It reads each question aloud, scores your spoken answer out of 10 with what to fix and a model answer, and ends with a report card. Without installing anything, the browser AI mock interview offers 113 real questions across 9 tracks. For behavioral stories, the free STAR story builder gives each one a clear shape, and if English isn't your first language, our tips for non-native speakers fit an English-language AI interview well.
Practice from your own résumé first
CoPilot Interview's Mock Interview builds questions from your résumé and the job description, reads them aloud and scores each answer out of 10, so your official Mercor attempt isn't your first. The free plan includes 15 minutes every day.
Try a free AI mock interviewFAQ
How long is the Mercor AI interview?
Mercor says most of its AI interviews take about 20 minutes, though some are shorter or longer. An attempt that ends much earlier than planned shows "Interview too short" and has to be retaken.
How many times can I retake the Mercor AI interview?
Up to three times across all applications that use that interview. Only your most recent attempt is reviewed, a retake resets your application progress, and hiring managers can see your retake count.
Does Mercor ask questions about my résumé?
Yes. Mercor says its AI interviewer generates questions based on your résumé and the job description, so prepare to explain every project, tool and result you list.
Can I use ChatGPT during the Mercor interview?
No. Mercor's policy allows grammar and wording checks but not using large language models to compose your responses. Take the assessment yourself and follow the employer's rules — use CoPilot Interview to practice beforehand.
Can I do the Mercor interview with a human instead?
No. Mercor says its AI interview is the standard and only method for screening candidates and cannot be done by chat, call or another medium.
Is the Mercor practice interview shared with companies?
No. Mercor says practice interviews are not shared with any companies and do not affect future opportunities. Its docs describe the Practice Interview as free and repeatable.
Can I get my Mercor interview transcript or feedback?
Mercor says it cannot share interview recordings or transcripts. Feedback is available only for some assessments, and when it is, you receive a link by email after you submit.