Urban Sky

Urban Sky is a Denver-based aerospace company, founded in 2016, that designs and operates reusable stratospheric microballoons for high-altitude remote sensing, persistent aerial surveillance, communications relay, and atmospheric data collection. Its balloons launch in under five minutes, float at 61,000-75,000 feet for multi-day missions, and carry the modular Wallabee payload platform with RGB, VNIR, and LWIR thermal sensors delivering 10cm-resolution imagery with real-time downlink. Through its Atmosys software platform, Urban Sky publishes an SDK for developers (JavaScript and Python, delivered via CDN loader) that streams real-time balloon telemetry over WebSocket and provides mission imagery access, serving defense and intelligence, commercial monitoring, and science and weather markets. Urban Sky is a Techstars portfolio company.

Urban Sky is listed with 1 API on the APIs.io network. Tagged areas include Company, Aerospace, Stratospheric Balloons, Remote Sensing, and Earth Observation.

The Urban Sky catalog on APIs.io includes 1 event-driven AsyncAPI specification.

Urban Sky’s developer surface includes engineering blog, documentation, API reference, getting-started guide, authentication, sandbox, and 17 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

33.3/100 thin ▬ flat Agent 23/100 agent aware Front door AI 1/6 silent Heartbeat 39/100 slowing saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

1 API 2 Agent Skills

Company AerospaceStratospheric BalloonsRemote Sensing Earth Observation Aerial Imagery Telemetry Defense Weather Real-Time

Kin Score

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

Composite quality — 33.3/100 · thin

Contract Quality 8.3 / 21

Developer Ergonomics 9.3 / 17

Access Clarity 3.6 / 17

Operational Transparency 0.3 / 11

Contract Governance 0.0 / 10

Discoverability 6.2 / 9

Regulatory Posture 2.9 / 15

Agent readiness — 23/100 · 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 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 6 / 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 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):

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
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link

8 more unmet checks in the Agent Readiness table above.

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

Access Clarity scores 21.1 — up to +15.8 composite points
Contract Quality scores 39.0 — up to +15.3 composite points
Operational Transparency scores 2.6 — up to +12.7 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/urban-sky/apis.yml: open an issue on github.com/api-evangelist/urban-sky 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 →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Space and Satellite (operators, earth observation, ground segment)	undeclared	-	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

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.

Agent Skills

measured — observed by APIs.io (published)

APIs 1

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

Urban Sky SDK (Real-time Balloon Telemetry)

Real-time balloon telemetry feed delivered over WebSocket via the Urban Sky SDK (JavaScript and Python, distributed by CDN loader from sdk.atmosys.com), with balloon and unassig...

Agent Skills 2

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

Urban Sky AI Assistant Guide (provider-published prompts)

AGENT SKILL

Receive real-time balloon telemetry from Urban Sky

AGENT SKILL

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Urban Sky Real-time Balloon Telemetry

Real-time balloon telemetry feed delivered over WebSocket by the Urban Sky SDK (JavaScript and Python). Clients authenticate with an organization-scoped API token and receive pu...

ASYNCAPI

Security Posture 2

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

Urban Sky Authentication

apiKey · 1 scheme

SECURITY

Urban Sky Domain Security

TLSv1.3 · DMARC

SECURITY

Resources

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

Sandbox

Sandbox

Documentation 3

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

AsyncAPI

AsyncAPI

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

AgentSkill

AgentSkill

LLMsTxt

LLMsTxt

Design & Contract 2

Pagination, idempotency, versioning, errors, and events

ErrorCatalog

ErrorCatalog

Conventions

Conventions

Build 3

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Packages

Packages

SDKs

SDKs

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Contact

Contact

Commercial 2

Pricing, plans, and the legal terms of use

PrivacyPolicy

PrivacyPolicy

TermsOfService

TermsOfService

Company 5

The organization behind the API

Website

About

Blog

Careers

LinkedIn

Source (apis.yml)

aid: urban-sky
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  - sandbox
  generated: '2026-11-06'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/urban-sky.png
name: Urban Sky
description: Urban Sky is a Denver-based aerospace company, founded in 2016, that designs and operates reusable stratospheric
  microballoons for high-altitude remote sensing, persistent aerial surveillance, communications relay, and atmospheric data
  collection. Its balloons launch in under five minutes, float at 61,000-75,000 feet for multi-day missions, and carry the
  modular Wallabee payload platform with RGB, VNIR, and LWIR thermal sensors delivering 10cm-resolution imagery with real-time
  downlink. Through its Atmosys software platform, Urban Sky publishes an SDK for developers (JavaScript and Python, delivered
  via CDN loader) that streams real-time balloon telemetry over WebSocket and provides mission imagery access, serving defense
  and intelligence, commercial monitoring, and science and weather markets. Urban Sky is a Techstars portfolio company.
url: https://raw.githubusercontent.com/api-evangelist/urban-sky/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- techstars
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
x-docs-platform: vitepress
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-10-17
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 12
  pass: local-v1
created: '2026-07-17'
modified: '2026-07-21'
tags:
- Company
- Aerospace
- Stratospheric Balloons
- Remote Sensing
- Earth Observation
- Aerial Imagery
- Telemetry
- Defense
- Weather
- Real-Time
apis:
- name: Urban Sky SDK (Real-time Balloon Telemetry)
  description: Real-time balloon telemetry feed delivered over WebSocket via the Urban Sky SDK (JavaScript and Python, distributed
    by CDN loader from sdk.atmosys.com), with balloon and unassigned-device location updates, an organization-scoped API-token
    auth model, a published REST test endpoint for verifying integrations, and advertised mission imagery access with signed
    URLs.
  humanURL: https://docs.urbansky.com/
  baseURL: https://api.ops.atmosys.com
  tags:
  - Telemetry
  - Balloons
  - Real-Time
  - WebSocket
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://urbansky.com/
- type: About
  url: https://urbansky.com/company/about
- type: Blog
  url: https://urbansky.com/news
- type: Careers
  url: https://urbansky.com/careers
- type: Contact
  url: https://urbansky.com/contact
- type: PrivacyPolicy
  url: https://urbansky.com/privacy-policy
- type: TermsOfService
  url: https://urbansky.com/terms-and-conditions
- type: LinkedIn
  url: https://www.linkedin.com/company/urban-sky-strato
- type: GitHubOrganization
  url: https://github.com/urban-sky
- type: DeveloperPortal
  url: https://docs.urbansky.com/
- type: Documentation
  url: https://docs.urbansky.com/
- type: APIReference
  url: https://docs.urbansky.com/api/javascript.html
- type: GettingStarted
  url: https://docs.urbansky.com/guide/getting-started.html
- type: Packages
  url: packages/urban-sky-packages.yml
- type: SDKs
  url: packages/urban-sky-packages.yml
- type: Authentication
  url: authentication/urban-sky-authentication.yml
- type: Sandbox
  url: sandbox/urban-sky-sandbox.yml
- type: ErrorCatalog
  url: errors/urban-sky-error-codes.yml
- type: Conventions
  url: conventions/urban-sky-conventions.yml
- type: AsyncAPI
  url: asyncapi/urban-sky-telemetry-asyncapi.yml
- type: AgentSkill
  url: skills/_index.yml
- type: LLMsTxt
  url: llms/urban-sky-llms.txt
- type: DomainSecurity
  url: security/urban-sky-domain-security.yml

Urban Sky API — frequently asked questions

Does Urban Sky have an API?

Yes. APIs.io lists 1 API from Urban Sky, including Urban Sky SDK (Real-time Balloon Telemetry).

How do I authenticate with the Urban Sky API?

Urban Sky uses bearer-token authentication (apiKey · 1 scheme). The details are profiled on APIs.io as Urban Sky Authentication.

Is the Urban Sky API ready for AI agents?

Urban Sky has a Kin Score of 33.3 out of 100 (thin) and an Agent Readiness score of 23.0 (agent-aware), scored by API Evangelist on 2026-11-06.

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