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+---
+title: TruthTracer | AI-Powered Misinformation Detection Platform
+description: A comprehensive misinformation detection platform that uses Perplexity's Sonar API to analyze claims, trace trust chains, and provide Socratic reasoning for fact verification
+sidebar_position: 25
+keywords: [TruthTracer, misinformation detection, fact-checking, trust chain analysis, Socratic reasoning, Perplexity, Sonar API, NestJS, React]
+---
+
+**TruthTracer** is a comprehensive misinformation detection platform that leverages Perplexity's Sonar API to provide multi-layered claim analysis. The platform combines fact-checking, trust chain tracing, and Socratic reasoning to deliver accurate, evidence-based verification results with confidence scores and detailed sourcing.
+
+### Demo
+
+<iframe
+  className="w-full aspect-video rounded-xl"
+  src="https://www.youtube.com/embed/twXeyK5ajyE"
+  title="YouTube video player"
+  frameBorder="0"
+  allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture"
+  allowFullScreen
+></iframe>
+
+## Features
+
+* **Multi-method Analysis** combining fact-checking, trust chain analysis, and Socratic reasoning
+* **AI-Powered Verification** using Perplexity's Sonar, Sonar Deep Research, and Sonar Reasoning models
+* **Real-time Processing** with parallel execution of multiple analysis methods
+* **Evidence-based Results** providing sources, confidence scores, and detailed reasoning
+* **Clean Architecture** with NestJS backend and React frontend
+* **Production-Ready** with Docker deployment, comprehensive testing, and API documentation
+* **Configurable Confidence Scoring** with customizable weights and thresholds
+
+## Prerequisites
+
+* Node.js 18+ and npm
+* Perplexity API key (Sonar models access)
+* Docker (optional for deployment)
+* Git for repository cloning
+
+## Installation
+
+```bash
+# Clone the backend repository
+git clone https://github.com/anthony-okoye/truth-tracer-backend.git
+cd truth-tracer-backend
+
+# Install dependencies
+npm install
+
+# Clone the frontend repository
+git clone https://github.com/anthony-okoye/truth-tracer-front.git
+cd truth-tracer-front
+
+# Install frontend dependencies
+npm install
+```
+
+## Configuration
+
+Create `.env` file in the backend directory:
+```ini
+# Required
+SONAR_API_KEY=your_perplexity_api_key
+SONAR_API_URL=https://api.perplexity.ai
+
+# Optional configuration
+SONAR_TIMEOUT=30000
+SONAR_MAX_RETRIES=3
+CONFIDENCE_WEIGHT_FACT_CHECK=0.35
+CONFIDENCE_WEIGHT_TRUST_CHAIN=0.25
+CONFIDENCE_WEIGHT_SOCRATIC=0.20
+```
+
+## Usage
+
+1. **Start Backend**:
+```bash
+   cd truth-tracer-backend
+   npm run start:dev
+   ```
+
+2. **Start Frontend**:
+```bash
+   cd truth-tracer-front
+   npm start
+   ```
+
+3. **Access Application**: Open http://localhost:3000 in your browser
+
+4. **Analyze Claims**:
+   - Enter a claim in the text area
+   - Click "Analyze Claim" to run fact-checking, trust chain analysis, and Socratic reasoning
+   - View results with confidence scores, sources, and detailed explanations
+
+## Code Explanation
+
+* **Backend**: NestJS application with clean architecture following TypeScript best practices
+* **AI Integration**: Perplexity Sonar API with three specialized models - Sonar for fact-checking, Sonar Deep Research for trust chain analysis, and Sonar Reasoning for logical evaluation
+* **Parallel Processing**: Simultaneous execution of all three analysis methods for efficient claim verification
+* **Response Sanitization**: Custom JSON parsing and validation to handle various API response formats
+* **Confidence Scoring**: Weighted scoring system combining results from all three analysis methods
+* **Frontend**: React application with intuitive claim submission interface and detailed results visualization
+* **Testing**: Comprehensive test suite including unit tests, end-to-end tests, and claim analysis testing
+
+## How the Sonar API is Used
+
+TruthTracer leverages Perplexity's Sonar API through three distinct analysis approaches:
+
+```typescript
+// Parallel execution of multiple Sonar models
+const [factCheckResult, trustChainResult, socraticResult] = await Promise.all([
+  sonarClient.chat.completions.create({
+    model: "sonar",
+    messages: [{ role: "user", content: factCheckPrompt }],
+    max_tokens: 500
+  }),
+  sonarClient.chat.completions.create({
+    model: "sonar-deep-research", 
+    messages: [{ role: "user", content: trustChainPrompt }],
+    max_tokens: 2500
+  }),
+  sonarClient.chat.completions.create({
+    model: "sonar-reasoning",
+    messages: [{ role: "user", content: socraticPrompt }],
+    max_tokens: 4000
+  })
+]);
+```
+
+## Links
+
+- [Live Demo](https://truthtracer.netlify.app/)
+- [Backend Repository](https://github.com/anthony-okoye/truth-tracer-backend)
+- [Frontend Repository](https://github.com/anthony-okoye/truth-tracer-front)