# Lemmy

**Canonical:** https://apis.io/providers/lemmy/  
**Website:** https://join-lemmy.org  
**APIs profiled:** 14

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.

## Kin Score — 44.9 / 100 (developing)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 44.9).

| Facet | Score |
|---|---|
| Discoverability | 74.1 |
| Contract Quality | 72.8 |
| Governance | 9.8 |
| Contract Governance | 9.8 |
| Operational Transparency | 60.5 |
| Developer Ergonomics | 11.9 |
| Commercial Clarity | 39.5 |
| Access Clarity | 39.5 |

## Agent readiness — 29.1 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Free · Self-serve signup — onboarding: self-serve, pricing: free, trial: no (confidence: high).

## APIs (14)

- **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

## Agentic access (1)

- **Lemmy Agentic Access** — 52 operations · 32 acting · 1 human-in-the-loop

## Security (2)

- **Lemmy Authentication** — http · 1 scheme
- **Lemmy Domain Security** — TLSv1.3 · DNSSEC · DMARC

## Plans (1)

- **Lemmy Plans Pricing**

## Tags

Communities, Federated, Fediverse, Link Aggregator, Open-Source, Social Networks

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/lemmy/). Scores are computed from the provider's own public artifacts under a published rubric.