Logseq

Logseq is a privacy-first, open-source platform for knowledge management and collaboration, built around a local-first outliner that stores notes as plain Markdown and Org-mode files linked into a personal knowledge graph. Its developer surface is a JavaScript/TypeScript plugin SDK (@logseq/libs) plus an in-app HTTP APIs server that exposes the same Editor and App proxy methods to local automation; there is no hosted public REST API. The project is developed in Clojure/ClojureScript, licensed AGPL-3.0, and backed by a16z.

Logseq is profiled on the APIs.io network. Tagged areas include Company, Knowledge-Management, Note Taking, Productivity, and Open-Source.

Logseq’s developer surface includes documentation, API reference, getting-started guide, engineering blog, support, changelog, and 9 more developer resources.

🌐 Visit website 📡 Source on GitHub

21.4/100 emerging ▬ flat Agent 0/100 human only library Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

0 APIs

Company Knowledge-Management Note Taking Productivity Open-Source Plugins SDK Knowledge Graph Markdown Local-First Developer Tools

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 21.4/100 · emerging

Contract Quality 0.0 / 25

Developer Ergonomics 10.5 / 20

Access Clarity 2.1 / 20

Operational Transparency 3.1 / 13

Contract Governance 0.0 / 12

Discoverability 5.7 / 10

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

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Security Posture 1

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Logseq Domain Security

TLSv1.3

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Build 3

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Packages

Packages

SDKs

SDKs

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 3

Status, limits, changes, and where to get help

Roadmap

Roadmap

Support

Support

ChangeLog

ChangeLog

Commercial 1

Pricing, plans, and the legal terms of use

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: logseq
name: Logseq
description: Logseq is a privacy-first, open-source platform for knowledge management and collaboration, built around a local-first
  outliner that stores notes as plain Markdown and Org-mode files linked into a personal knowledge graph. Its developer surface
  is a JavaScript/TypeScript plugin SDK (@logseq/libs) plus an in-app HTTP APIs server that exposes the same Editor and App
  proxy methods to local automation; there is no hosted public REST API. The project is developed in Clojure/ClojureScript,
  licensed AGPL-3.0, and backed by a16z.
deliveryModel:
  model: library
  open_source: false
  commercial: false
  callable_host: false
  label: Library · distributed through package registries, no callable service
  confidence: low
  source:
  - none
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
image: https://avatars.githubusercontent.com/u/63385289?v=4
url: https://raw.githubusercontent.com/api-evangelist/logseq/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- a16z
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-20'
tags:
- Company
- Knowledge-Management
- Note Taking
- Productivity
- Open-Source
- Plugins
- SDK
- Knowledge Graph
- Markdown
- Local-First
- Developer Tools
tags_raw:
- Company
- Knowledge Management
- Note Taking
- Productivity
- Open Source
- Plugins
- SDK
- Knowledge Graph
- Markdown
- Local-First
- Developer Tools
apis: []
common:
- type: Website
  url: https://logseq.com
- type: DeveloperPortal
  url: https://plugins-doc.logseq.com
- type: Documentation
  url: https://docs.logseq.com
- type: APIReference
  url: https://plugins-doc.logseq.com
- type: GettingStarted
  url: https://logseq.github.io/plugins/
- type: Blog
  url: https://blog.logseq.com
- type: GitHubOrganization
  url: https://github.com/logseq
- type: Roadmap
  url: https://logseq.io/p/NX4mc_ggEV
- type: Support
  url: https://discuss.logseq.com
- type: PrivacyPolicy
  url: https://blog.logseq.com/privacy-policy
- type: Packages
  url: packages/logseq-packages.yml
- type: SDKs
  url: packages/logseq-packages.yml
- type: ChangeLog
  url: changelog/logseq-changelog.yml
- type: LLMsTxt
  url: llms/logseq-llms.txt
- type: DomainSecurity
  url: security/logseq-domain-security.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-20'
  status: enriched
  artifacts_added: 4
  pass: local-v1

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