aplusz-app

AplusZ is a travel search platform that helps users find the absolute lowest air ticket price for any route on any day. It offers free unlimited searches, exact best date and price, saved routes, reminders, calendar export, offline functionality, and a Pro plan with unlimited route sets and swaps. The service provides a public fare API (OpenAPI) at https://aplusz.app/openapi.json for developers to query flight pricing data programmatically.

aplusz-app publishes 4 API contracts indexed on the APIs.io network, including Cities API, Fare API, Health API, and 1 more. Tagged areas include Company, Travel, Airfare, Search, and Free.

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

aplusz-app’s developer surface includes documentation, API reference, support, engineering blog, pricing, and 24 more developer resources.

🌐 Visit website📡 Profile data on GitHub
43.6/100 developing Agent 38/100 agent ready Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →
1 published contract 1 MCP Servers 3 Agent Skills
CompanyTravelAirfareSearchFreeBooking

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-10-31 · rubric v0.25.0
Composite quality — 43.6/100 · developing
Contract Quality 11.0 / 21
Developer Ergonomics 5.1 / 17
Access Clarity 8.9 / 17
Operational Transparency 1.7 / 11
Contract Governance 2.2 / 10
Discoverability 5.5 / 9
Regulatory Posture 5.1 / 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 0 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 0 / 6
Agent Skills 5 / 5
Well-Known Catalog 4 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 8 / 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/.
Show this score on your site. Kin Score badge preview for aplusz-app It updates itself when the score changes. Paste this where you link to your API docs: 
<a href="https://apis.io/providers/aplusz-app/"><img src="https://apis.io/badge/aplusz-app/card.svg" alt="aplusz-app on APIs.io — Kin Score by API Evangelist"></a>
Other styles, a README pill and a shields.io endpoint are on the badge page.
Raise your score.
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)
  • Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
  • 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)
  • Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
  • Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks
5 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/aplusz-app/apis.yml: open an issue on github.com/api-evangelist/aplusz-app 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 4

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

aplusz-app Cities API

The Cities API from aplusz-app — 1 operation(s) for cities.

aplusz-app Fare API

The Fare API from aplusz-app — 1 operation(s) for fare.

aplusz-app Health API

The Health API from aplusz-app — 1 operation(s) for health.

aplusz-app Routes API

The Routes API from aplusz-app — 1 operation(s) for routes.

MCP Servers 1

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

aplusz-app MCP Server

Remote MCP server at aplusz.app.

MCP SERVER

Agent Skills 3

Packaged agent skills for driving this provider's APIs from an AI assistant.

find-cheapest-fare

AGENT SKILL

list-routes-from

AGENT SKILL

resolve-city

AGENT SKILL

Pricing Plans 1

Published pricing tiers and plan structures.

Aplusz App Plans Pricing

1 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Aplusz App Rate Limits

0 limits

RATE LIMITS

Semantic Vocabularies 1

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

Aplusz App Context

2 classes · 19 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

aplusz-app API Rules

11 rules · 9 errors 1 warnings 1 info

SPECTRAL

JSON Schema 1

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

Fare

17 properties

JSON SCHEMA

Security Posture 3

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

Aplusz App Authentication

0 schemes

SECURITY

Aplusz App Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Aplusz App Vulnerability Disclosure

security.txt · contact published

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Aplusz App Scopes

OAuth 2.0 · no documented scopes

0 scopes

SCOPES

Agentic Access 1

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

Aplusz App Agentic Access

4 operations

4 operations · 0 acting

AGENTIC

Resources

Documentation 2

Reference material describing how the API behaves

Documentation
Documentation
 APIReference
APIReference

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess
 AgentSkill
AgentSkill
 LLMsTxt
LLMsTxt
 MCPServer
MCPServer
 WellKnown
WellKnown

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

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

Build 2

SDKs, sample code, and the tooling you integrate with

ToolCrosswalk
ToolCrosswalk
 GitHubOrganization
GitHubOrganization

Access & Security 4

Authentication, authorization, and security posture

Security
Security
 SecurityTxt
SecurityTxt
 VulnerabilityDisclosure
VulnerabilityDisclosure
 DomainSecurity
DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support
Support

Commercial 4

Pricing, plans, and the legal terms of use

Plans
Plans
 Pricing
Pricing
 TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy

Company 2

The organization behind the API

Website
Website
 Blog
Blog

Other 3

Properties that don't map to a standard resource type

AgentCard
AgentCard
 Hosts
Hosts
 Vendors
Vendors

Source (apis.yml)

apis.yml Raw ↑ 
aid: aplusz-app
name: aplusz-app
description: AplusZ is a travel search platform that helps users find the absolute lowest air ticket price for any route on
  any day. It offers free unlimited searches, exact best date and price, saved routes, reminders, calendar export, offline
  functionality, and a Pro plan with unlimited route sets and swaps. The service provides a public fare API (OpenAPI) at https://aplusz.app/openapi.json
  for developers to query flight pricing data programmatically.
url: https://artifacts.apis.io/aplusz-app/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-29 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-29'
modified: '2026-10-29'
image: https://aplusz.app/assets/icons/icon-192.png
tags:
- Company
- Travel
- Airfare
- Search
- Free
- Booking
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/aplusz-app-agentic-access.yml
- type: Plans
  url: plans/aplusz-app-plans-pricing.yml
- type: Spectral
  url: rules/aplusz-app-rules.yml
- type: JSONLD
  url: json-ld/aplusz-app-context.jsonld
- type: Vocabulary
  url: vocabulary/aplusz-app-vocabulary.yml
- type: AgentSkill
  url: skills/_index.yml
- type: DataModel
  url: data-model/aplusz-app-data-model.yml
- type: Security
  url: https://aplusz.app/legal/
- type: ErrorCatalog
  url: errors/aplusz-app-problem-types.yml
- type: Conformance
  url: conformance/aplusz-app-conformance.yml
- type: LLMsTxt
  url: llms/aplusz-app-llms.txt
- type: AgentCard
  url: a2a/aplusz-app-a2a.yml
- type: ToolCrosswalk
  url: mcp/aplusz-app-tool-crosswalk.yml
- type: MCPServer
  url: mcp/aplusz-app-mcp.yml
- type: SecurityTxt
  url: well-known/aplusz-app-security.txt
- type: WellKnown
  url: well-known/aplusz-app-well-known.yml
- type: Hosts
  url: hosts/aplusz-app-hosts.yml
- type: Vendors
  url: vendors/aplusz-app-vendors.yml
- type: VulnerabilityDisclosure
  url: security/aplusz-app-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/aplusz-app-domain-security.yml
- type: Website
  url: https://aplusz.app/
- type: Documentation
  url: https://aplusz.app/docs
- type: APIReference
  url: https://aplusz.app/openapi.json
- type: Support
  url: https://aplusz.app/support
- type: Blog
  url: https://aplusz.app/blog
- type: Pricing
  url: https://aplusz.app/pricing
- type: TermsOfService
  url: https://aplusz.app/terms
- type: PrivacyPolicy
  url: https://aplusz.app/privacy
- type: GitHubOrganization
  url: https://github.com/dagrang-repository/aplusz
apis:
- aid: aplusz-app:aplusz-app-cities-api
  name: aplusz-app Cities API
  description: The Cities API from aplusz-app — 1 operation(s) for cities.
  humanURL: https://aplusz.app/
  baseURL: https://aplusz.app
  tags:
  - Cities
  properties:
  - type: OpenAPI
    url: openapi/aplusz-app-cities-api-openapi.yml
  - type: JSONSchema
    url: json-schema/aplusz-app-fare-schema.json
- aid: aplusz-app:aplusz-app-fare-api
  name: aplusz-app Fare API
  description: The Fare API from aplusz-app — 1 operation(s) for fare.
  humanURL: https://aplusz.app/
  baseURL: https://aplusz.app
  tags:
  - Fare
  properties:
  - type: OpenAPI
    url: openapi/aplusz-app-fare-api-openapi.yml
  - type: JSONSchema
    url: json-schema/aplusz-app-fare-schema.json
- aid: aplusz-app:aplusz-app-health-api
  name: aplusz-app Health API
  description: The Health API from aplusz-app — 1 operation(s) for health.
  humanURL: https://aplusz.app/
  baseURL: https://aplusz.app
  tags:
  - Health
  properties:
  - type: OpenAPI
    url: openapi/aplusz-app-health-api-openapi.yml
  - type: JSONSchema
    url: json-schema/aplusz-app-fare-schema.json
- aid: aplusz-app:aplusz-app-routes-api
  name: aplusz-app Routes API
  description: The Routes API from aplusz-app — 1 operation(s) for routes.
  humanURL: https://aplusz.app/
  baseURL: https://aplusz.app
  tags:
  - Routes
  properties:
  - type: OpenAPI
    url: openapi/aplusz-app-routes-api-openapi.yml
  - type: JSONSchema
    url: json-schema/aplusz-app-fare-schema.json
x-enrichment:
  date: '2026-10-29'
  status: enriched
  artifacts_added: 39
  pass: modular-v1
  engine: identity=oss,contract=oss,surfaces=oss,docs=oss,regulatory=oss

aplusz-app API — frequently asked questions

Does aplusz-app have an API?

Yes. APIs.io lists 4 APIs from aplusz-app, including aplusz-app Cities API, aplusz-app Fare API and aplusz-app Health API, and 1 more.

Is there an OpenAPI specification for the aplusz-app API?

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

How do I authenticate with the aplusz-app API?

aplusz-app documents its authentication (0 schemes). The details are profiled on APIs.io as Aplusz App Authentication.

How much does the aplusz-app API cost?

APIs.io lists 1 pricing plan for aplusz-app, with each plan's price, limits and inclusions under Pricing Plans on this page.

Does aplusz-app have an MCP server?

Yes. APIs.io lists 1 MCP server for aplusz-app: Remote MCP server at aplusz.app.

Is the aplusz-app API ready for AI agents?

aplusz-app has a Kin Score of 43.6 out of 100 (developing) and an Agent Readiness score of 38.3 (agent-ready), scored by API Evangelist on 2026-10-31.

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for providers

9 MCP tools reach this
  • find_providersBrowse and filter every provider in the catalog.
  • 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.
All 92 tools →

Call it yourself

curl for this page
This provider 
curl "https://apis.io/api/v1/providers/aplusz-app"
All providers 
curl "https://apis.io/api/v1/providers?limit=25"
Every operation they expose 
curl "https://apis.io/api/v1/providers/aplusz-app/operations?limit=25"
How their score was established 
curl "https://apis.io/api/v1/providers/aplusz-app/evidence"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.