This documentation covers SEARCH, REVIEW, and PREDUPE. ACTIVITY and VERIFY are hosted on a separate domain (
resdefio.com) and are documented separately.1. What is Research Defender?
Research Defender protects survey data quality by identifying fraudulent, duplicate, and low-effort respondents before and during a survey. It combines digital fingerprinting, duplication detection, and open-end text analysis into a set of API products you call as respondents move through your survey flow.2. The Products
SEARCH
Fingerprinting, bot/click-farm detection, and duplication scoring.
PREDUPE
Detect prior survey attempts before the respondent enters.
REVIEW
Open-end text quality analysis.
Platform Guides
Platform-specific setup for Qualtrics, Forsta, Alchemer, and more.
3. How It Fits Your Survey Flow
- At entry, call SEARCH (optionally with PREDUPE parameters) to fingerprint the respondent, detect duplicates, and check for fraud signals before they enter the survey.
- During the survey, use REVIEW to analyze open-ended responses for copy/paste, profanity, low engagement, and LLM-generated text.
- Apply your term logic based on the scores returned. Research Defender publishes recommended term logic for each product.
4. Protecting Your Integration
Nefarious respondents may attempt API suppression or link manipulation to bypass security checks. Research Defender offers two options to protect against this:- V3 server-to-server tokens (GETTOKEN) — hide sensitive scores behind a server-side response.
- V4 Hashed Validation — validate request inputs and outputs with a SHA-256 value signed by your private key.
5. Next Steps
Environments & Authentication
Base URLs and how publishable and private keys are used.
API Reference
Parameters, response schemas, and a live playground for every endpoint.