4dayweek-io

4dayweek.io operates a job marketplace that lists roles offering a four‑day work week, nine‑day fortnights, half‑day Fridays, flexible hours and other reduced‑hour schedules. The platform serves job seekers looking for better work‑life balance and allows employers with genuine reduced‑hours policies to post openings. It offers free browsing and a paid Pro subscription for early access and alerts, and integrates an auto‑apply service for members.

4dayweek-io publishes 3 API contracts indexed on the APIs.io network: 4dayweek.io Public API, Jobs API, and MCP API. Tagged areas include Remote Jobs, Flexible Schedule, Work-Life Balance, and Recruiting.

The 4dayweek-io catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

4dayweek-io’s developer surface includes engineering blog, API reference, and 17 more developer resources.

🌐 Visit website📡 Profile data on GitHub
28.1/100 thin ▼ -5.0 Agent 38/100 agent ready Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →
1 published contract 1 MCP Servers
Remote JobsFlexible ScheduleWork-Life BalanceRecruiting

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0
Composite quality — 28.1/100 · thin
Contract Quality 13.0 / 21
Developer Ergonomics 0.8 / 17
Access Clarity 2.9 / 17
Operational Transparency 0.0 / 11
Contract Governance 2.2 / 10
Discoverability 4.9 / 9
Regulatory Posture 2.2 / 15
Agent readiness — 38/100 · agent ready
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
Documented Reversibility 0 / 6
MCP Server 12 / 12
Machine-Readable Auth 0 / 10
Idempotency 0 / 9
Stable Error Semantics 8 / 8
Request/Response Examples 7 / 7
Rate-Limit Signaling 7 / 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
Pagination 5 / 5
Distinct Operations 3 / 3
MCP Tool Quality 6 / 6
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):
  • Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey)
  • 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
  • Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
  • Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented)
  • Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks
7 more unmet checks in the Agent Readiness table above.
Kin Score — facets with the most composite points still available (weight × headroom):
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/4dayweek-io/apis.yml: open an issue on github.com/api-evangelist/4dayweek-io 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 →

Standards implemented 2

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

Model Context Protocol (MCP)
measured — observed by APIs.io (documented)
OpenAPI
measured — observed by APIs.io (published)

APIs 3

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

4dayweek-io 4dayweek.io Public API

The 4dayweek.io Public API API from 4dayweek-io — 1 operation(s) for 4dayweek.io public api.

4dayweek-io Jobs API

The Jobs API from 4dayweek-io — 2 operation(s) for jobs.

4dayweek-io MCP API

Read-only Model Context Protocol endpoint for AI assistants. JSON-RPC over streamable HTTP, so it does not follow REST conventions and is described here only so that a client ge...

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

4dayweek-io MCP Server

Remote MCP server at 4dayweek.io.

MCP SERVER

Semantic Vocabularies 1

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

4Dayweek Io Context

10 classes · 65 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

4dayweek-io API Rules

14 rules · 10 errors 1 warnings 3 info

SPECTRAL

JSON Schema 3

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

LegacyListResponse

5 properties

JSON SCHEMA

V2Job

27 properties

JSON SCHEMA

V2ListResponse

5 properties

JSON SCHEMA

Security Posture 1

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

4Dayweek Io Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

4Dayweek Io Agentic Access

10 operations · 2 acting

10 operations · 2 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

Login
Login

Documentation 1

Reference material describing how the API behaves

APIReference
APIReference

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess
 LLMsTxt
LLMsTxt
 MCPServer
MCPServer

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Spectral
Spectral
 JSONLD
JSONLD
 Vocabulary
Vocabulary
 DataModel
DataModel
 ErrorCatalog
ErrorCatalog
 Conformance
Conformance

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy

Company 3

The organization behind the API

Newsroom
Newsroom
 Blog
Blog
 Website
Website

Other 2

Properties that don't map to a standard resource type

Hosts
Hosts
 Vendors
Vendors

Source (apis.yml)

apis.yml Raw ↑ 
aid: 4dayweek-io
name: 4dayweek-io
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - security
  generated: '2026-11-06'
  method: derived
image: https://4dayweek.io/api/og/home
description: 4dayweek.io operates a job marketplace that lists roles offering a four‑day work week, nine‑day fortnights, half‑day
  Fridays, flexible hours and other reduced‑hour schedules. The platform serves job seekers looking for better work‑life balance
  and allows employers with genuine reduced‑hours policies to post openings. It offers free browsing and a paid Pro subscription
  for early access and alerts, and integrates an auto‑apply service for members.
url: https://artifacts.apis.io/4dayweek-io/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-31 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-31'
modified: '2026-10-31'
tags:
- Remote Jobs
- Flexible Schedule
- Work-Life Balance
- Recruiting
tags_raw:
- Remote Jobs
- Flexible Schedule
- Work‑Life Balance
- Recruiting
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/4dayweek-io-agentic-access.yml
- type: Spectral
  url: rules/4dayweek-io-rules.yml
- type: JSONLD
  url: json-ld/4dayweek-io-context.jsonld
- type: Vocabulary
  url: vocabulary/4dayweek-io-vocabulary.yml
- type: DataModel
  url: data-model/4dayweek-io-data-model.yml
- type: ErrorCatalog
  url: errors/4dayweek-io-problem-types.yml
- type: Conformance
  url: conformance/4dayweek-io-conformance.yml
- type: LLMsTxt
  url: llms/4dayweek-io-llms.txt
- type: MCPServer
  url: mcp/4dayweek-io-mcp.yml
- type: Hosts
  url: hosts/4dayweek-io-hosts.yml
- type: Vendors
  url: vendors/4dayweek-io-vendors.yml
- type: TermsOfService
  url: https://4dayweek.io/terms
- type: PrivacyPolicy
  url: https://4dayweek.io/privacy
- type: Newsroom
  url: https://4dayweek.io/press
- type: Login
  url: https://4dayweek.io/login
- type: Blog
  url: https://4dayweek.io/blog
- type: APIReference
  url: https://4dayweek.io/developers
- type: DomainSecurity
  url: security/4dayweek-io-domain-security.yml
- type: Website
  url: https://4dayweek.io/
apis:
- aid: 4dayweek-io:4dayweek-io-4dayweek-io-public-api-api
  name: 4dayweek-io 4dayweek.io Public API
  description: The 4dayweek.io Public API API from 4dayweek-io — 1 operation(s) for 4dayweek.io public api.
  humanURL: https://4dayweek.io/developers
  baseURL: https://4dayweek.io
  tags:
  - 4dayweek.io Public API
  properties:
  - type: OpenAPI
    url: openapi/4dayweek-io-4dayweek-io-public-api-api-openapi.yml
  - type: JSONSchema
    url: json-schema/4dayweek-io-v2-job-schema.json
  - type: JSONSchema
    url: json-schema/4dayweek-io-legacy-list-response-schema.json
  - type: JSONSchema
    url: json-schema/4dayweek-io-v2-list-response-schema.json
- aid: 4dayweek-io:4dayweek-io-jobs-api
  name: 4dayweek-io Jobs API
  description: The Jobs API from 4dayweek-io — 2 operation(s) for jobs.
  humanURL: https://4dayweek.io/developers
  baseURL: https://4dayweek.io
  tags:
  - Job
  tags_raw:
  - Jobs
  properties:
  - type: OpenAPI
    url: openapi/4dayweek-io-jobs-api-openapi.yml
  - type: JSONSchema
    url: json-schema/4dayweek-io-v2-job-schema.json
  - type: JSONSchema
    url: json-schema/4dayweek-io-legacy-list-response-schema.json
  - type: JSONSchema
    url: json-schema/4dayweek-io-v2-list-response-schema.json
- aid: 4dayweek-io:4dayweek-io-mcp-api
  name: 4dayweek-io MCP API
  description: Read-only Model Context Protocol endpoint for AI assistants. JSON-RPC over streamable HTTP, so it does not
    follow REST conventions and is described here only so that a client generated from this spec knows the path exists.
  humanURL: https://4dayweek.io/developers
  baseURL: https://4dayweek.io
  tags:
  - MCP
  tags_raw:
  - mcp
  properties:
  - type: OpenAPI
    url: openapi/4dayweek-io-mcp-api-openapi.yml
  - type: JSONSchema
    url: json-schema/4dayweek-io-v2-job-schema.json
  - type: JSONSchema
    url: json-schema/4dayweek-io-legacy-list-response-schema.json
  - type: JSONSchema
    url: json-schema/4dayweek-io-v2-list-response-schema.json
x-enrichment:
  date: '2026-10-31'
  status: enriched
  artifacts_added: 18
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

4dayweek-io API — frequently asked questions

Does 4dayweek-io have an API?

Yes. APIs.io lists 3 APIs from 4dayweek-io, including 4dayweek-io 4dayweek.io Public API, 4dayweek-io Jobs API and 4dayweek-io MCP API.

Is there an OpenAPI specification for the 4dayweek-io API?

Yes. APIs.io indexes 3 OpenAPI specifications for 4dayweek-io, each linked for download from this page.

Does 4dayweek-io have an MCP server?

Yes. APIs.io lists 1 MCP server for 4dayweek-io: Remote MCP server at 4dayweek.io.

Is the 4dayweek-io API ready for AI agents?

4dayweek-io has a Kin Score of 28.1 out of 100 (thin) and an Agent Readiness score of 37.6 (agent-ready), scored by API Evangelist on 2026-11-06.

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