Free directory of MCP server facts with checked information from public records
Stage
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Founded
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Based in
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Pricing model
Freemium
Free
Pricing
Free plan includes upload and process small files, Chrome/VS Code extension, unlimited downloads, and visualization with tables and charts. Pro plan costs $2.49/month (monthly) or is available yearly, includes ad-free experience, compare and analyze data, edit JSON from diagrams, unlimited diagrams
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Key features
Interactive tree view with expand/collapse and color-coded syntax highlighting
Side-by-side JSON comparison with visual diff viewer
AI-powered JSON diagram generation from natural language
Convert JSON data into dynamic charts and graphs
Chrome extension for instant visualization on any webpage
Multi-format support for YAML, XML, CSV, TOML, TOON and Mermaid
REST API client with diagram visualization of responses
Customizable themes and multi-node color customization
Export diagrams as images and download graphs
Free JSON API with no authentication required
Server search and filtering by name and description
Rankings by downloads, stars and record checks
Server comparison and topic filtering
Self-test command for your own server
Record checks with badge for README
Corrections log tracking fact updates
CC BY 4.0 licensed data export
Change tracking for registry updates
Allowlist export for company filtering
What makes it different
Supports 6+ data formats including JSON, YAML, XML, CSV, TOML and TOON in one tool
AI-powered assistant to generate and transform JSON using natural language commands
Chrome and VS Code extensions for seamless workflow integration
Privacy-first design with data stored only upon manual upload
Native mobile apps for Android and iOS for on-the-go visualization
Scheduled re-checking of all facts on a regular basis, unlike the official registry which only checks on publication
Every fact shown with its source and the date checked
No ads, sponsors or paid placements; income never changes listings or rankings
Corrections publicly logged and requests always answered with reasoning
Open API accessible to everyone without authentication key
JSON Viewer
ProtocolProbe