Vikunja

Vikunja is an open-source, self‑hostable task management platform offering lists, Kanban, Gantt, and table views. It emphasizes data ownership, privacy, and European hosting, with optional cloud hosting. The software is released under AGPL‑v3 and provides import tools for Todoist, Trello, and Microsoft To‑Do.

Vikunja is listed with 2 APIs on the APIs.io network. Tagged areas include Company, OpenSource, TaskManagement, SelfHostable, and European.

The Vikunja catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

Vikunja’s developer surface includes authentication, changelog, getting-started guide, documentation, pricing, support, and 16 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

40.9/100 developing Agent 20/100 agent aware Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

2 APIs

CompanyOpenSourceTaskManagementSelfHostableEuropean

Kin Score

Kin Score How this is scored →
scored 2026-10-31 · rubric v0.25.0

Composite quality — 40.9/100 · developing

Contract Quality 5.1 / 21

Developer Ergonomics 6.5 / 17

Access Clarity 11.2 / 17

Operational Transparency 3.5 / 11

Contract Governance 2.2 / 10

Discoverability 4.9 / 9

Regulatory Posture 4.0 / 15

Agent readiness — 20/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 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 4 / 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

Pagination 5 / 5

Distinct Operations 3 / 3

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

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.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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Agent readiness — checks not met, largest first (exact, from this profile):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)

10 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 24.0 — up to +19.0 composite points
Developer Ergonomics scores 38.1 — up to +12.4 composite points
Contract Governance scores 22.0 — up to +9.4 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from the provider profile at artifacts.apis.io/vikunja/apis.yml: open an issue on github.com/api-evangelist/vikunja to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 2

Individual APIs this provider publishes, each with its own machine-readable definition.

Vikunja API

Vikunja provides a task management API documented at the public documentation site. No machine‑readable contract (OpenAPI, GraphQL, AsyncAPI, gRPC, or WSDL) was found.

Vikunja API

Vikunja API as documented publicly: 20 operations. Contract generated from the documentation by API Evangelist (2026-10-28); not the provider's own document.

Pricing Plans 1

Published pricing tiers and plan structures.

Vikunja Plans Pricing

3 plans

PLANS

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Vikunja Context

8 classes · 8 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Vikunja API Rules

12 rules · 9 errors 2 warnings 1 info

SPECTRAL

JSON Schema 6

Standalone JSON Schema definitions for this provider's data models.

GetApiV1FiltersIdResponse

7 properties

JSON SCHEMA

GetApiV1FiltersResponse

7 properties

JSON SCHEMA

PostApiV1FiltersIdRequest

4 properties

JSON SCHEMA

PostApiV1FiltersIdResponse

7 properties

JSON SCHEMA

PutApiV1FiltersRequest

4 properties

JSON SCHEMA

PutApiV1FiltersResponse

7 properties

JSON SCHEMA

Security Posture 3

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

Vikunja Authentication

1 scheme

SECURITY

Vikunja Domain Security

TLSv1.3 · DNSSEC · DMARC

SECURITY

Vikunja Vulnerability Disclosure

no policy recorded

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

Login

GettingStarted

GettingStarted

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

Conformance

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 4

Authentication, authorization, and security posture

Authentication

Authentication

Security

Security

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

ChangeLog

ChangeLog

Support

Support

Commercial 3

Pricing, plans, and the legal terms of use

Plans

Plans

Pricing

Pricing

PrivacyPolicy

PrivacyPolicy

Company 1

The organization behind the API

Website

Website

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: vikunja
name: Vikunja
image: https://vikunja.io/og/index.webp
description: Vikunja is an open-source, self‑hostable task management platform offering lists, Kanban, Gantt, and table views.
  It emphasizes data ownership, privacy, and European hosting, with optional cloud hosting. The software is released under
  AGPL‑v3 and provides import tools for Todoist, Trello, and Microsoft To‑Do.
url: https://artifacts.apis.io/vikunja/apis.yml
x-type: company
x-source: harvest:new-submission
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-28 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-28'
modified: '2026-10-28'
tags:
- Company
- OpenSource
- TaskManagement
- SelfHostable
- European
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Plans
  url: plans/vikunja-plans-pricing.yml
- type: Spectral
  url: rules/vikunja-rules.yml
- type: JSONLD
  url: json-ld/vikunja-context.jsonld
- type: Vocabulary
  url: vocabulary/vikunja-vocabulary.yml
- type: DataModel
  url: data-model/vikunja-data-model.yml
- type: Authentication
  url: authentication/vikunja-authentication.yml
- type: Conformance
  url: conformance/vikunja-conformance.yml
- type: LLMsTxt
  url: llms/vikunja-llms.txt
- type: Hosts
  url: hosts/vikunja-hosts.yml
- type: Vendors
  url: vendors/vikunja-vendors.yml
- type: Security
  url: https://vikunja.io/security
- type: Login
  url: https://console.vikunja.io/login
- type: ChangeLog
  url: https://vikunja.io/changelog
- type: GettingStarted
  url: https://vikunja.io/docs/fail2ban
- type: VulnerabilityDisclosure
  url: security/vikunja-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/vikunja-domain-security.yml
- type: Website
  url: https://vikunja.io/
- type: Documentation
  url: https://vikunja.io/docs
- type: Pricing
  url: https://vikunja.io/pricing
- type: PrivacyPolicy
  url: https://vikunja.io/privacy
- type: Support
  url: https://vikunja.io/support
- type: GitHubOrganization
  url: https://github.com/go-vikunja
apis:
- name: Vikunja API
  description: Vikunja provides a task management API documented at the public documentation site. No machine‑readable contract
    (OpenAPI, GraphQL, AsyncAPI, gRPC, or WSDL) was found.
  humanURL: https://vikunja.io/docs
  baseURL: null
  aid: vikunja:vikunja-api-2
- aid: vikunja:vikunja-api
  name: Vikunja API
  description: 'Vikunja API as documented publicly: 20 operations. Contract generated from the documentation by API Evangelist
    (2026-10-28); not

    the provider''s own document.'
  humanURL: https://vikunja.io/docs/api-v2
  baseURL: https://dl.vikunja.io
  properties:
  - type: OpenAPI
    url: openapi/_ae-authored/vikunja-openapi-generated.yml
    x-provenance: generated
  - type: JSONSchema
    url: json-schema/vikunja-put-api-v1-filters-response-schema.json
  - type: JSONSchema
    url: json-schema/vikunja-get-api-v1-filters-id-response-schema.json
  - type: JSONSchema
    url: json-schema/vikunja-get-api-v1-filters-response-schema.json
  - type: JSONSchema
    url: json-schema/vikunja-post-api-v1-filters-id-response-schema.json
  - type: JSONSchema
    url: json-schema/vikunja-put-api-v1-filters-request-schema.json
  - type: JSONSchema
    url: json-schema/vikunja-post-api-v1-filters-id-request-schema.json
x-submission-probe: 200, 2026-10-26
x-coverage:
  state: unreadable
  reason: no-machine-readable-spec
  detail: Documentation pages exist but no OpenAPI, GraphQL, AsyncAPI, gRPC, or WSDL spec could be retrieved.
  evidence:
  - url: https://api.vikunja.io/openapi.json
    status: 404
  checked: '2026-10-28'
x-enrichment:
  date: '2026-10-28'
  status: enriched
  artifacts_added: 26
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Vikunja API — frequently asked questions

Does Vikunja have an API?

Yes. APIs.io lists 2 APIs from Vikunja, including Vikunja API and Vikunja API.

Is there an OpenAPI specification for the Vikunja API?

Yes. APIs.io indexes 1 OpenAPI specification for Vikunja, each linked for download from this page.

How do I authenticate with the Vikunja API?

Vikunja uses bearer-token authentication (1 scheme). The details are profiled on APIs.io as Vikunja Authentication.

How much does the Vikunja API cost?

APIs.io lists 3 pricing plans for Vikunja, with each plan's price, limits and inclusions under Pricing Plans on this page.

Is the Vikunja API ready for AI agents?

Vikunja has a Kin Score of 40.9 out of 100 (developing) and an Agent Readiness score of 20.1 (agent-aware), scored by API Evangelist on 2026-10-31.

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