Liar’s Ledger
The record doesn’t lie. Politicians do.
Liar’s Ledger is a Chrome browser extension that detects politicians mentioned in news articles and surfaces their official voting records in real time — no searching, no tab switching.
What it does
- You click Scan This Page on any political news article
- Two independent AI models extract the specific claim being made about each politician
- The extension matches that claim against official congressional records
- Results appear in a bottom bar — sponsored legislation, roll-call votes, and interest group ratings
Core principles
Neutral by architecture — The AI never sees voting data and never makes political judgments. It only converts article text to structured data. All ground truth comes from official government sources.
Dual-model verification — Claude (Anthropic) and Mistral independently analyze each article. When both agree on a claim, it’s marked ✓ Verified Statement. When they disagree, both interpretations are shown.
Keys server-side — All API keys live in the backend proxy at api.liarsledger.com. Nothing sensitive ships in the extension.
Quick links
- Architecture — how the full pipeline works
- Dual-Model Verification — how claims are verified
- Data Sources — Congress.gov, GovTrack, VoteSmart
- Backend Proxy — server architecture and deployment
- Installation — developer mode setup
- Contributing — how to help
Data sources
| Source | Data | Key required |
|---|---|---|
| Congress.gov | Sponsored/cosponsored legislation | Yes (server-side) |
| GovTrack | Roll-call vote history | No |
| VoteSmart | Interest group ratings, vote history | Yes (server-side) |