Hop Aero website screenshot

Hop Aero

Hop Aero is a Y Combinator (Summer 2026) aerospace and defense company based in Los Angeles, California, founded in 2024 by Jacob Balaj and Matija Milenovic. The company develops hypersonic rocket cargo vehicles that deliver payloads point-to-point into austere, contested environments hundreds of miles away in minutes, aiming to give the United States and its allies an asymmetric logistics advantage. Hop Aero has raised a $3M pre-seed round and won a $1.25M U.S. Air Force SBIR award; its team draws on experience from SpaceX, Virgin Orbit, Masten Space Systems, SpinLaunch, and Destinus. This is a hardware-stage company with no public API or developer surface at the time of profiling; this record was added to the API Evangelist network as a portfolio-lead stub and is maintained for network discovery and enrichment.

Hop Aero is profiled on the APIs.io network. Tagged areas include Company, Aerospace, Defense, Space, and Logistics.

🌐 Visit website 📡 Source on GitHub
6.8/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5
0 APIs
CompanyAerospaceDefenseSpaceLogisticsRocketryHypersonicsY Combinator

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 6.8/100 · minimal
Contract Quality 0.0 / 25
Developer Ergonomics 0.0 / 20
Commercial Clarity 0.0 / 20
Operational Transparency 0.0 / 13
Governance 0.0 / 12
Discoverability 6.8 / 10
Agent readiness — 0/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 15
MCP Server 0 / 12
Machine-Readable Auth 0 / 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 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/hop-aero: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Security Posture 1

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

Hop Aero Domain Security

TLSv1.3

SECURITY

Resources

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Company 2

The organization behind the API

Website
Website
 LinkedIn
LinkedIn

Source (apis.yml)

apis.yml Raw ↑ 
aid: hop-aero
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/hop-aero.png
name: Hop Aero
description: Hop Aero is a Y Combinator (Summer 2026) aerospace and defense company based in Los Angeles, California, founded
  in 2024 by Jacob Balaj and Matija Milenovic. The company develops hypersonic rocket cargo vehicles that deliver payloads
  point-to-point into austere, contested environments hundreds of miles away in minutes, aiming to give the United States
  and its allies an asymmetric logistics advantage. Hop Aero has raised a $3M pre-seed round and won a $1.25M U.S. Air Force
  SBIR award; its team draws on experience from SpaceX, Virgin Orbit, Masten Space Systems, SpinLaunch, and Destinus. This
  is a hardware-stage company with no public API or developer surface at the time of profiling; this record was added to the
  API Evangelist network as a portfolio-lead stub and is maintained for network discovery and enrichment.
url: https://raw.githubusercontent.com/api-evangelist/hop-aero/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- y-combinator
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-19'
tags:
- Company
- Aerospace
- Defense
- Space
- Logistics
- Rocketry
- Hypersonics
- Y Combinator
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
apis: []
common:
- type: DomainSecurity
  url: security/hop-aero-domain-security.yml
- type: Website
  url: https://hop-aero.com/
- type: LinkedIn
  url: https://www.linkedin.com/company/hop-aero/
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence