Lemmy
Lemmy is a free, open-source, self-hostable federated link aggregator and discussion platform built as a Reddit alternative. It exposes a versioned REST API at /api/v4/ for creating posts, commenting, managing communities, voting, searching, and administering instances. Lemmy federates across the Fediverse using the ActivityPub protocol, allowing users on different Lemmy instances and compatible platforms (Mastodon, PeerTube, Friendica) to interact without a central server. Each instance operator configures their own rate limits; default limits include 50 comments per 10 minutes, 100 searches per 10 minutes, and 5 new registrations per day. Authentication uses JWT bearer tokens obtained via the login endpoint. The software is licensed under AGPL-3.0 and written in Rust with an Actix web framework backend.
Lemmy publishes 14 APIs on the APIs.io network, including Account API, Admin API, Authentication API, and 11 more. Tagged areas include Communities, Federated, Fediverse, Link Aggregator, and Open-Source.
The Lemmy catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.
Lemmy’s developer surface includes authentication, documentation, getting-started guide, engineering blog, and 10 more developer resources.
Kin Score
APIs 14
Individual APIs this provider publishes, each with its own machine-readable definition.
Lemmy Account API
User account management and settings
Lemmy Admin API
Administrative actions
Lemmy Authentication API
Account registration, login, and password management
Lemmy Comment API
Creating and managing comments
Lemmy Community API
Community management and discovery
Lemmy Federation API
ActivityPub federation and cross-instance operations
Lemmy Images API
Image upload and retrieval
Lemmy Notifications API
User notifications and alerts
Lemmy Person API
User profiles and discovery
Lemmy Post API
Creating and managing posts
Lemmy Private Messages API
Direct messaging between users
Lemmy Reports API
Content reporting and moderation
Lemmy Search API
Search across posts, comments, communities, and users
Lemmy Site API
Site-level information and configuration
Scroll for all 14
Pricing Plans 1
Published pricing tiers and plan structures.
Lemmy Plans Pricing
PLANSRate Limits 1
Documented rate limits and quota policies.
Lemmy Rate Limits
RATE LIMITSFinOps 1
Cost, billing, and metering signals for API financial operations.
Lemmy Finops
FINOPSSemantic Vocabularies 1
JSON-LD contexts and semantic vocabularies used across these APIs.
Lemmy Context
JSON-LDSpectral Rules 1
Spectral governance rulesets for linting and validating these APIs.
Lemmy API Rules
SPECTRALJSON Schema 3
Standalone JSON Schema definitions for this provider's data models.
Examples 3
Example request and response payloads for these APIs.
Security Posture 2
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Agentic Access 1
Recommended x-agentic-access execution contracts for AI agents.
Resources
Get Started 1
Portal, sign-up, and the first successful call
Documentation 1
Reference material describing how the API behaves
Agent Surfaces 1
MCP servers, agent skills, and machine-readable catalogs
Build 2
SDKs, sample code, and the tooling you integrate with
Access & Security 2
Authentication, authorization, and security posture
Operate 1
Status, limits, changes, and where to get help
Commercial 3
Pricing, plans, and the legal terms of use
Company 2
The organization behind the API
Other 1
Properties that don't map to a standard resource type