Host Registry

A curated registry of network hosts found in Obsidian plugin source code, maintained by the Plugin Observer project.

This registry maps hostnames to categories, enabling automated classification of network activity in Obsidian plugins.

Usage

Consume the registry via raw GitHub URL:

https://raw.githubusercontent.com/plugin-observer/host-registry/main/registry.json

Categories metadata:

https://raw.githubusercontent.com/plugin-observer/host-registry/main/categories.json

Data format

registry.json maps category slugs to arrays of hostnames:

{
  "cloud-ai": ["api.openai.com", "api.anthropic.com", ...],
  "code-hosting": ["github.com", "api.github.com", ...]
}

categories.json provides metadata for each category slug:

[
  { "slug": "cloud-ai", "label": "Cloud AI Provider", "description": "AI/ML inference and generation APIs" }
]

Category taxonomy

Slug	Label	Description
cloud-ai	Cloud AI Provider	AI/ML inference and generation APIs
code-hosting	Code Hosting	Source code hosting and package registries
cloud-storage	Cloud Storage/Sync	Cloud file storage, sync, and productivity APIs
plugin-infra	Plugin Infrastructure	Obsidian core infrastructure and release endpoints
cdn	CDN	Content delivery networks
media	Media/Reference	Media content and reference data APIs
image-hosting	Image Hosting	Image upload and hosting services
social	Social Media	Social media platform APIs
translation	Translation Service	Machine translation APIs
analytics	Analytics/Tracking	Usage tracking and telemetry services
productivity	SaaS Task/Project Management	Task management and productivity SaaS APIs
weather-geo	Weather/Geolocation/Mapping	Weather, geolocation, and mapping APIs
entertainment	Media/Streaming Metadata	Streaming and entertainment metadata APIs
auth-identity	OAuth/Login Endpoints	OAuth providers and identity verification endpoints
plugin-backend	Plugin Server Infrastructure	Custom backend servers operated by plugin authors
communication	Chat/Messaging Integration	Chat and messaging platform APIs
academic-research	Citation/Reference/Library	Academic citation, reference, and library APIs
finance	Financial Data/Payments	Financial data feeds and payment APIs
gaming	Game Metadata/Achievements	Game metadata and achievement tracking APIs
unclassified	Not Yet Classified	Hosts awaiting classification
unknown	Unknown	Unrecognized or suspicious hosts

Schemas

JSON schemas for both files are in the schema/ directory:

• schema/registry.schema.json
• schema/categories.schema.json

Contributing

See CONTRIBUTING.md for how to add hosts or propose new categories.