Guestline

Guestline provides hospitality management software solutions as part of The Access Group. Their platform helps hotels, resorts, and other accommodation providers manage bookings, front‑desk operations, housekeeping, revenue, and guest experiences. Integrated with a suite of finance, HR, and property maintenance tools, Guestline enables property owners to streamline operations, improve efficiency, and deliver better service across multiple locations.

Guestline is listed with 1 API on the APIs.io network. Tagged areas include Company, Hospitality, Software, Software-as-a-Service, and Travel.

Guestline’s developer surface includes documentation and 8 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

8.3/100 minimal ▬ flat Agent 14/100 agent aware Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

1 API

Company Hospitality Software Software-as-a-Service Travel

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 8.3/100 · minimal

Contract Quality 0.0 / 21

Developer Ergonomics 1.9 / 17

Access Clarity 0.0 / 17

Operational Transparency 0.0 / 11

Contract Governance 0.0 / 10

Discoverability 5.5 / 9

Regulatory Posture 1.8 / 15

Agent readiness — 14/100 · agent aware

Machine-Readable Contract 0 / 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 5 / 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 6 / 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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<a href="https://apis.io/providers/guestline/"><img src="https://apis.io/badge/guestline/card.svg" alt="Guestline on APIs.io — Kin Score by API Evangelist"></a>

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

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
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)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0

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 0.0 — up to +25.0 composite points
Access Clarity scores 0.0 — up to +20.0 composite points
Developer Ergonomics scores 11.2 — up to +17.8 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/guestline/apis.yml: open an issue on github.com/api-evangelist/guestline 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 1

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

Guestline API

Guestline API portal listing of available APIs.

Security Posture 1

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

Guestline Domain Security

TLSv1.2 · DMARC

SECURITY

Resources

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

WellKnown

WellKnown

AgentSkill

AgentSkill

LLMsTxt

LLMsTxt

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Company 2

The organization behind the API

Newsroom

Newsroom

Website

Website

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: guestline
name: Guestline
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  probe_state: unreadable
  source:
  - security
  generated: '2026-11-06'
  method: derived
image: https://www.theaccessgroup.com/media/emqaqtdb/accessgroup.png?width=1200&height=630&v=1db4fc939acac40
description: Guestline provides hospitality management software solutions as part of The Access Group. Their platform helps
  hotels, resorts, and other accommodation providers manage bookings, front‑desk operations, housekeeping, revenue, and guest
  experiences. Integrated with a suite of finance, HR, and property maintenance tools, Guestline enables property owners to
  streamline operations, improve efficiency, and deliver better service across multiple locations.
url: https://raw.githubusercontent.com/api-evangelist/guestline/refs/heads/main/apis.yml
x-type: company
x-source: harvest:travel
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-12 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-12'
modified: '2026-10-12'
tags:
- Company
- Hospitality
- Software
- Software-as-a-Service
- Travel
tags_raw:
- Company
- Hospitality
- Software
- SaaS
- Travel
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: WellKnown
  url: well-known/guestline-well-known.yml
- type: AgentSkill
  url: skills/_index.yml
- type: LLMsTxt
  url: llms/guestline-llms.txt
- type: Hosts
  url: hosts/guestline-hosts.yml
- type: Vendors
  url: vendors/guestline-vendors.yml
- type: Newsroom
  url: https://www.theaccessgroup.com/en-gb/about/news/
- type: Documentation
  url: https://developers.guestline.com/
- type: DomainSecurity
  url: security/guestline-domain-security.yml
- type: Website
  url: https://guestline.com/
apis:
- name: Guestline API
  description: Guestline API portal listing of available APIs.
  humanURL: https://developers.guestline.com/apis
  aid: guestline:guestline-api
x-coverage:
  state: unreadable
  reason: js-rendered-docs
  detail: Developer portal pages are rendered via JavaScript, preventing machine‑readable spec discovery.
  evidence:
  - url: https://developers.guestline.com/apis
    status: 200
  checked: '2026-10-12'
x-enrichment:
  date: '2026-10-12'
  status: enriched
  artifacts_added: 8
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Guestline API — frequently asked questions

Does Guestline have an API?

Yes. APIs.io lists 1 API from Guestline, including Guestline API.

Is the Guestline API ready for AI agents?

Guestline has a Kin Score of 8.3 out of 100 (minimal) and an Agent Readiness score of 14.0 (agent-aware), scored by API Evangelist on 2026-11-06.

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get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

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