# Strella Docs > Documentation for Strella, an AI-moderated user research platform. ## Developer & API reference The pages below are the product Guides (how to use Strella). For the REST API itself — endpoints, request/response schemas, auth — use these machine-readable sources: - [OpenAPI 3.1 specification](https://app.strella.io/api/public/v1/openapi.json): every endpoint, schema, and authentication requirement for the Strella public REST API (base path `/api/public/v1`, API-key auth). - [API reference](https://app.strella.io/docs/api): the interactive Scalar reference rendered from that spec. - [Welcome to Strella](https://app.strella.io/docs/product): Strella is an AI-moderated user-research platform. Design a study, recruit participants, let the AI run interviews for you, then analyze, report, and share. - [Changelog](https://app.strella.io/docs/product/changelog): New features, improvements, and fixes shipped to Strella — most recent first. ## Get started - [Run your first study](https://app.strella.io/docs/product/get-started/quickstart): End-to-end walkthrough: from a blank study to your first analyzed interview, in about 15 minutes of clicking plus however long recruiting takes. - [How AI helps you in Strella](https://app.strella.io/docs/product/get-started/ai-assistants): AI helps at every stage of a study: setting up, running interviews, analyzing results, and sharing findings. Here is each place it helps and what it does. - [Glossary](https://app.strella.io/docs/product/get-started/glossary): The vocabulary you will see across the app and the docs. ## Build a study - [The Build screen](https://app.strella.io/docs/product/build/build-screen): Build is where you author your screener and your question guide, with an AI assistant to help, all on one screen. - [Start with the study setup chat](https://app.strella.io/docs/product/build/project-setup-chat): Use the AI setup chat to turn a research question into a first-draft screener and question guide in a few minutes. - [Set up your study details](https://app.strella.io/docs/product/build/project-details): Name your study, describe what participants will be doing, and pick who on your team gets notified. - [Write research objectives](https://app.strella.io/docs/product/build/research-objectives): Research objectives are the 2 to 5 things you want to learn from this study. They organize the AI analysis, so make them specific. - [Build your screener](https://app.strella.io/docs/product/build/screener): The screener is the short questionnaire that decides whether someone qualifies for the interview. Build it in the top region of the Guide panel. - [Build your question guide](https://app.strella.io/docs/product/build/interview-guide): The question guide is the ordered set of steps the AI moderator runs through with each participant. Add steps from five groups: Ask, Survey, Structure, Usability, and Test. - [Best practices](https://app.strella.io/docs/product/build/best-practices): Rules and rules of thumb for screeners and question guides that produce genuine, useful responses. - [Add survey questions to your interview](https://app.strella.io/docs/product/build/survey-questions): Survey steps collect structured answers in the middle of an interview: multiple choice, ranking, open text, sliders, ratings, file uploads, grids, and NPS. - [Add a stimulus to your interview](https://app.strella.io/docs/product/build/stimulus): Show participants an image, a video, a website, an embed, a written concept, or a Figma prototype during the interview. A stimulus usually pairs with a task or open question. - [Host a prototype and add it to your interview](https://app.strella.io/docs/product/build/host-a-prototype): Publish an HTML prototype built with an AI tool such as Claude, v0, Lovable, or Bolt to the public web, then show it to participants during the interview. - [Add a card sort](https://app.strella.io/docs/product/build/card-sort): A card sort asks participants to drag a set of cards into groups, so you learn how they naturally organize your ideas, features, or content. - [Add a tree test](https://app.strella.io/docs/product/build/tree-test): A tree test gives participants a task and a bare menu of labels, so you learn whether people can find things in your navigation before you build it. - [Randomize sections (A/B variants)](https://app.strella.io/docs/product/build/randomization): A Randomization block splits your interview into branches. Each participant sees one, picked at random and kept if they come back. - [Conditional sections](https://app.strella.io/docs/product/build/conditional-sections): Show a section only to participants who match a rule, based on screener answers, earlier survey responses, or quotas. - [Version history](https://app.strella.io/docs/product/build/version-history): Build keeps a running history of your question guide, so you can see earlier versions, preview them, and restore one without losing your current work. - [Use the build assistant](https://app.strella.io/docs/product/build/build-assistant): The Assistant panel in Build reads your draft and helps you edit it: rewriting questions, suggesting follow-ups, adding sections. - [Preview your interview](https://app.strella.io/docs/product/build/preview): Take your own interview from end to end before you publish. - [Upload an existing discussion guide](https://app.strella.io/docs/product/build/upload-a-guide): Drop a guide you already wrote into the Assistant and have Strella rebuild it as a question guide, question for question. - [Import from another study](https://app.strella.io/docs/product/build/import): Select screener questions and interview items from another study, then add them to or replace the current guide. ## Configure the interview - [How the AI moderator works](https://app.strella.io/docs/product/configure/how-the-ai-moderator-works): Strella runs every interview with an AI moderator that talks to the participant by voice, follows your guide, and asks follow-ups in real time. - [Voice, language & behavior](https://app.strella.io/docs/product/configure/voice-language-behavior): Configure how the AI moderator sounds and how it conducts the interview. Find all settings in Settings → AI moderator. - [Recording modes](https://app.strella.io/docs/product/configure/recording-modes): Choose what the call captures: webcam, screen share, captions, and the privacy options in between. Find all settings in Settings → Interview setup. - [Custom dictionary & pronunciation](https://app.strella.io/docs/product/configure/custom-dictionary): Teach the AI moderator how to pronounce names, product terms, and jargon so it says them correctly. - [Customize the participant experience](https://app.strella.io/docs/product/configure/participant-experience): Brand the pages your participants see: study title, description, logo, colors, font, custom closed message, post-interview redirects. - [What the AI moderator can't do](https://app.strella.io/docs/product/configure/moderator-limits): An honest list of limits, so you can set expectations and design around them. ## Recruit participants - [How recruitment works](https://app.strella.io/docs/product/recruit/overview): There are two ways to bring people into your study: hire from a third-party panel, or bring your own. Both add participants to the same participant table. - [Schedule moderated interviews](https://app.strella.io/docs/product/recruit/schedule-moderated-interviews): Set the times you and your teammates are free to run interviews, so participants in a human moderated study can book one. - [Hire from a participant panel](https://app.strella.io/docs/product/recruit/hire-from-panel): Place an order through Strella to source participants from Respondent or User Interviews. Strella handles vendor targeting and payouts. - [Bring your own participants](https://app.strella.io/docs/product/recruit/bring-your-own): Send a share link to your own list, or import an existing list via CSV. Both add people to the same Participants table. - [Manage share links & redirects](https://app.strella.io/docs/product/recruit/share-links): Create one or more share links per study. Give each link its own recruitment settings and redirect destinations so different audiences are handled the right way. - [Pass data with URL parameters](https://app.strella.io/docs/product/recruit/url-parameters): Add parameters to any share link to tag participants with custom fields, pre-fill their details, set their language, and send your own IDs back to your tools. - [Control access & scheduling](https://app.strella.io/docs/product/recruit/access-and-scheduling): Open and close your study. Cap participant counts, schedule a close date, and disqualify off-target answers automatically. - [Set quotas](https://app.strella.io/docs/product/recruit/quotas): Quotas cap how many participants of a given segment can complete the study. Set them per screener answer. - [Approve, reject & invite](https://app.strella.io/docs/product/recruit/approve-reject-invite): Once participants start arriving, you decide who moves forward. The Participants table is where you approve, reject, invite, and tag. - [Pay participants you recruited](https://app.strella.io/docs/product/recruit/pay-participants): Pay the participants you brought in yourself in one step: pick who to pay, set one payment method and one incentive, and confirm. - [Report a participant](https://app.strella.io/docs/product/recruit/report-participant): Strella auto-pays panel participants a set time after their interview. Here is how the payment window works and how to report a fraudulent or low-quality participant before they are paid. - [Watch the funnel](https://app.strella.io/docs/product/recruit/funnel): The funnel shows stage-by-stage conversion, from clicking your share link through finishing the interview, so you can spot drop-off. ## Run your study - [Publish your study](https://app.strella.io/docs/product/run/publish): Publishing opens your study to participants. Strella runs final checks, locks the screener, and switches the study from draft to live. - [Edit a study after launch](https://app.strella.io/docs/product/run/edit-after-launch): Almost everything in a live study stays editable. Edits affect future participants only. Anyone already in flight finishes on the version they started. ## Analyze your interviews - [Get oriented in Results](https://app.strella.io/docs/product/analyze/overview): Results is where finished interviews turn into insight. Five sub-tabs cover the work from a single recording to organization-wide themes. - [Bring in interviews you ran elsewhere](https://app.strella.io/docs/product/analyze/upload-interviews): Upload a recording, a transcript, or your notes from research you ran outside Strella, and analyze it alongside your Strella interviews. - [Review a single interview](https://app.strella.io/docs/product/analyze/review-interview): Watch the recording, read the transcript, add highlights, exclude from analysis, or regenerate the transcript, all in one session view. - [Browse analysis](https://app.strella.io/docs/product/analyze/browse-analysis): Themes, sentiment, and quotes across every interview, grouped by objective or by question, with segments compared side by side. Click any quote to jump to the source moment. - [Code responses](https://app.strella.io/docs/product/analyze/code-responses): Turn open-ended answers into a set of categories you can count and filter by, generated automatically or from your own prompt. - [See how participants complete on-screen tasks](https://app.strella.io/docs/product/analyze/task-analysis): For tasks on a live website or app, Strella watches the screen recording to grade pass/fail and map the screens each participant moved through. - [See how participants sorted your cards](https://app.strella.io/docs/product/analyze/card-sort-analysis): For card sort questions, Strella combines every sort into one card-by-group table, and keeps each individual sort on the participant who made it. - [See how participants use your Figma prototype](https://app.strella.io/docs/product/analyze/figma-prototypes): Read the click heatmap, paths, and screen metrics Strella captures when a participant moves through a Figma prototype during an interview. - [Use Strella's AI chat](https://app.strella.io/docs/product/analyze/ai-chat): Ask the AI analyst questions in plain language. It reads every completed interview, cites quotes, and can create a report or a highlight reel from what it finds. - [AI chat best practices](https://app.strella.io/docs/product/analyze/ai-chat-best-practices): How to prompt the AI analyst so it gives sharp, well-sourced answers, and how to turn a good conversation into a chart, report, or highlight reel. ## Share findings - [Build & share a report](https://app.strella.io/docs/product/share/reports): Generate a written report of your study, customize the cover image, and share it by link or download it. - [Create & share a highlight reel](https://app.strella.io/docs/product/share/highlight-reels): A highlight reel is a shareable collection of highlights, from one or more interviews. Save the ones worth keeping, then share or download them. ## Account & admin - [Teammates, organizations & workspaces](https://app.strella.io/docs/product/account/teammates-and-workspaces): Invite people to your organization, switch between organizations you belong to, and group studies into workspaces. - [Delete projects](https://app.strella.io/docs/product/account/delete-projects): Remove one project or a whole selection from your dashboard, and what to settle before you do. - [Project defaults](https://app.strella.io/docs/product/account/project-defaults): Set the settings every new project starts with, so your team configures each study once instead of every time. - [Billing & credits](https://app.strella.io/docs/product/account/billing): Strella supports pre-purchased wallet credits, pay-as-you-go card checkout, and invoiced billing for enterprise. View your balance and transaction history in Billing. - [Connect Figma](https://app.strella.io/docs/product/account/figma): Connect your Figma account so a Prototype step captures where participants click and turns it into a heatmap. Prototype steps work without the connection, and the connection adds the click data. - [API, MCP & AI assistants](https://app.strella.io/docs/product/account/api-mcp-assistants): Strella exposes a public REST API, an MCP server, and connectors for Claude, ChatGPT, and Figma Make. Generate keys and configure connections here. - [Participant data access](https://app.strella.io/docs/product/account/participant-data-access): Control how much participant personal information each teammate and AI tool can read through the Strella API and AI assistants. - [Media links and who can open them](https://app.strella.io/docs/product/account/media-links): Photos, videos, and documents in a project are reached by a link that never expires. Some of those links open for anyone; most ask the person to be signed in to the workspace running the study. - [Activity logs](https://app.strella.io/docs/product/account/audit-logs): See who did what in your organization. Useful for compliance, debugging access issues, and tracking down changes. ## Reference - [Step types](https://app.strella.io/docs/product/reference/step-types): Every kind of step you can add to a question guide, grouped by purpose. - [Screener question types](https://app.strella.io/docs/product/reference/screener-question-types): The five types of question you can add to a screener. - [Recording settings](https://app.strella.io/docs/product/reference/recording-modes): Every toggle on the Interview setup tab and what it controls. - [Participant statuses & funnel stages](https://app.strella.io/docs/product/reference/statuses-and-funnel): The tabs in the Participants table and the stages in the recruitment funnel. - [Supported languages](https://app.strella.io/docs/product/reference/languages): The languages the AI moderator can run interviews in. Pick one or many in Settings → AI moderator. - [Voice options](https://app.strella.io/docs/product/reference/voice-options): Voices come from four providers. Each has different strengths in quality, expressiveness, and language coverage. - [Browser & device requirements](https://app.strella.io/docs/product/reference/browser-device-requirements): What participants need to take part. What you need to author and review. ## MCP server - [MCP server](https://app.strella.io/docs/product/mcp): Connect Strella to Claude, ChatGPT, Figma Make, and other AI assistants via the Model Context Protocol. Explore projects, analyze transcripts, and manage studies through natural conversation. - [Connect an AI client](https://app.strella.io/docs/product/mcp/connect): Add the Strella connector to Claude, ChatGPT, Figma Make, Claude Code, or Cursor. Directory listings for Claude and ChatGPT, plus step-by-step setup for every other client. - [Tools & skills reference](https://app.strella.io/docs/product/mcp/tools): Every tool the Strella connector exposes, with parameters, field selection, and behavior, plus the skills your AI loads for complex workflows. - [Use cases & example prompts](https://app.strella.io/docs/product/mcp/use-cases): Copy-paste prompts for exploring research, analyzing transcripts, and managing projects through your AI assistant, plus a walkthrough of what each one does. - [What's new](https://app.strella.io/docs/product/mcp/whats-new): Recent additions to the Strella connector - [Security & privacy](https://app.strella.io/docs/product/mcp/security): What data the AI can access through the Strella connector, who can make changes, how sign-in works, who can see your conversations, and how to disconnect. - [FAQ & troubleshooting](https://app.strella.io/docs/product/mcp/faq): Common questions about connecting Strella to your AI tools: setup, privacy, technical details, and fixes for missing tools or repeated errors.