Cities Database API

The Cities Database API by AirLabs provides a global reference dataset of cities keyed to IATA metropolitan area codes, ISO country codes, and geographic coordinates. The API is consumed alongside the AirLabs Airports, Airlines, and Flights APIs to power travel search, mapping, geocoding, and clustering experiences. Authentication uses an api_key query parameter obtained from the AirLabs account dashboard. All responses are JSON arrays of city objects.

Cities Database API publishes 1 API contract indexed on the APIs.io network: Cities API. Tagged areas include Cities, Data, Geography, Location, and Reference Data.

The Cities Database API catalog on APIs.io includes 1 JSON-LD context and 2 Spectral governance rulesets.

Cities Database API’s developer surface includes engineering blog, authentication, documentation, pricing, signup flow, support, and 16 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

30.2/100 thin ▬ flat Agent 21/100 agent aware Front door AI 1/6 silent saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessFreemiumSelf serve⚡ Free to try

1 published contract

Cities Data Geography Location Reference Data Travel

Kin Score

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

Composite quality — 30.2/100 · thin

Contract Quality 11.7 / 21

Developer Ergonomics 3.4 / 17

Access Clarity 2.5 / 17

Operational Transparency 0.9 / 11

Contract Governance 1.4 / 10

Discoverability 5.6 / 9

Regulatory Posture 2.5 / 15

Agent readiness — 21/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 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 4 / 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 does not apply to this provider. The published contracts declare no write operations, and a read-only API cannot create-or-update. The facet is excluded from this provider's denominator entirely — not scored zero. A reference or data API is not deficient for being unable to upsert.

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.

It updates itself when the score changes. Paste this where you link to your API docs:

<a href="https://apis.io/providers/cities-database-api/"><img src="https://apis.io/badge/cities-database-api/card.svg" alt="Cities Database API 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):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
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
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
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)

6 more unmet checks in the Agent Readiness table above.

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

Access Clarity scores 14.5 — up to +17.1 composite points
Developer Ergonomics scores 20.2 — up to +16.0 composite points
Operational Transparency scores 7.9 — up to +12.0 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/cities-database-api/apis.yml: open an issue on github.com/api-evangelist/cities-database-api 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 1

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.

OpenAPI

measured — observed by APIs.io (published)

APIs 1

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

Cities Database API Cities API

The Cities API from Cities Database API — 1 operation(s) for cities.

Postman Collections 1

Ready-to-run Postman collections for exercising this provider's APIs.

AirLabs Database Cities API

POSTMAN

Open Collections 2

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

AirLabs Database Cities API

OPEN COLLECTION

AirLabs Cities Database API

OPEN COLLECTION

Cities Database API pricing

Not yet checked against Cities Database API's own pricing page. Compiled by API Evangelist on 2026-05-04; confirm before you rely on a figure. A free plan or tier is listed.

Plan	Price
Free freemium	Free
Professional paid	Free
Enterprise enterprise	—

Plan details, limits and sources →

Rate limits

Free Tier Default: 10 requests per minute
Free Tier Monthly Quota: 1000 requests per month
Professional Tier Default: 100 requests per minute

Compiled by API Evangelist, not yet checked against Cities Database API's documentation. All 5 limits →

Pricing Plans 1

Published pricing tiers and plan structures.

Cities Database Api Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Cities Database Api Rate Limits

5 limits

RATE LIMITS

Service Levels 1

Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.

Cities Database API

SLA

FinOps 1

Cost, billing, and metering signals for API financial operations.

Cities Database Api Finops

FINOPS

Semantic Vocabularies 1

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

Cities Database Api Context

13 classes · 0 properties

JSON-LD

Spectral Rules 2

Spectral governance rulesets for linting and validating these APIs.

Cities Database API — jsonschema rules

5 rules · 4 warnings 1 info

SPECTRAL

Cities Database API API Rules

5 rules · 3 errors 2 warnings

SPECTRAL

JSON Schema 1

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

AirLabs City

12 properties

JSON SCHEMA

Security Posture 2

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

Cities Database Api Authentication

apiKey · 1 scheme

SECURITY

Cities Database Api Domain Security

TLSv1.3 · DMARC

SECURITY

Agentic Access 1

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

Cities Database Api Agentic Access

1 operation

1 operations · 0 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

Signup

Signup

Login

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

JSONSchema

JSONSchema

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Design & Contract 2

Pagination, idempotency, versioning, errors, and events

JSONLD

JSONLD

Spectral

Spectral

Build 1

SDKs, sample code, and the tooling you integrate with

PostmanWorkspace

PostmanWorkspace

Access & Security 3

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Authentication

Authentication

Operate 3

Status, limits, changes, and where to get help

RateLimits

RateLimits

Support

Support

StatusPage

StatusPage

Commercial 5

Pricing, plans, and the legal terms of use

Plans

FinOps

Pricing

PrivacyPolicy

TermsOfService

Company 2

The organization behind the API

Blog

Blog

Website

Website

Other 1

Properties that don't map to a standard resource type

Account

Account

Source (apis.yml)

aid: cities-database-api
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Freemium · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/cities-database-api.png
name: Cities Database API
url: https://raw.githubusercontent.com/api-evangelist/cities-database-api/refs/heads/main/apis.yml
created: '2024-03-30'
modified: '2026-10-06'
type: Index
access: 3rd-Party
position: Consuming
specificationVersion: '0.23'
tags:
- Cities
- Data
- Geography
- Location
- Reference Data
- Travel
tags_raw:
- Cities
- Data
- Geography
- Locations
- Reference Data
- Travel
description: The Cities Database API by AirLabs provides a global reference dataset of cities keyed to IATA metropolitan area
  codes, ISO country codes, and geographic coordinates. The API is consumed alongside the AirLabs Airports, Airlines, and
  Flights APIs to power travel search, mapping, geocoding, and clustering experiences. Authentication uses an api_key query
  parameter obtained from the AirLabs account dashboard. All responses are JSON arrays of city objects.
apis:
- aid: cities-database-api:cities-database-api-cities-api
  name: Cities Database API Cities API
  description: The Cities API from Cities Database API — 1 operation(s) for cities.
  humanURL: https://airlabs.co/docs/cities
  baseURL: https://airlabs.co/api/v9
  tags:
  - Cities
  properties:
  - type: OpenAPI
    url: openapi/cities-database-api-cities-api-openapi.yml
  - type: Documentation
    url: https://airlabs.co/docs/cities
  - type: APIReference
    url: https://airlabs.co/docs
  - type: Authentication
    url: https://airlabs.co/account/api-key
common:
- type: Plans
  url: plans/cities-database-api-plans-pricing.yml
- type: RateLimits
  url: rate-limits/cities-database-api-rate-limits.yml
- type: FinOps
  url: finops/cities-database-api-finops.yml
- url: https://airlabs.co/blog/
  type: Blog
- type: PostmanWorkspace
  url: https://www.postman.com/kinlaneapi/cities-database-api/overview
- type: AgenticAccess
  url: agentic-access/cities-database-api-agentic-access.yml
- type: DomainSecurity
  url: security/cities-database-api-domain-security.yml
- type: Authentication
  url: authentication/cities-database-api-authentication.yml
- type: Website
  url: https://airlabs.co/
- type: Documentation
  url: https://airlabs.co/docs
- type: Pricing
  url: https://airlabs.co/pricing
- type: Signup
  url: https://airlabs.co/signup
- type: Login
  url: https://airlabs.co/login
- type: Account
  url: https://airlabs.co/account
- type: Authentication
  url: https://airlabs.co/account/api-key
- type: PrivacyPolicy
  url: https://airlabs.co/privacy
- type: TermsOfService
  url: https://airlabs.co/terms
- type: Support
  url: https://airlabs.co/contact
- type: StatusPage
  url: https://airlabs.co/status
- type: JSONLD
  url: json-ld/cities-database-api-context.jsonld
- type: JSONSchema
  url: json-schema/cities-database-api-city-schema.json
- type: Spectral
  url: rules/cities-database-api-rules.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

Cities Database API — frequently asked questions

Does Cities Database API have an API?

Yes. APIs.io lists 1 API from Cities Database API, including Cities Database API Cities API.

Is there an OpenAPI specification for the Cities Database API?

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

How do I authenticate with the Cities Database API?

Cities Database API uses bearer-token authentication (apiKey · 1 scheme). The details are profiled on APIs.io as Cities Database Api Authentication.

How much does the Cities Database API cost?

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

Is the Cities Database API ready for AI agents?

Cities Database API has a Kin Score of 30.2 out of 100 (thin) and an Agent Readiness score of 20.7 (agent-aware), scored by API Evangelist on 2026-11-06.

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/cities-database-api"

All providers

curl "https://apis.io/api/v1/providers?limit=25"

Every operation they expose

curl "https://apis.io/api/v1/providers/cities-database-api/operations?limit=25"

How their score was established

curl "https://apis.io/api/v1/providers/cities-database-api/evidence"

Calls without X-API-Key need no key. Calls with it need a paid plan — get a key.

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.