Nebula Security

Nebula Security is an AI-native cybersecurity company backed by Y Combinator (S26) and founded by world-class hackers — members of a top CTF team, DEF CON winners, Black Hat speakers, and cybersecurity PhDs. Its product, Vega, is an AI security agent that audits codebases for vulnerabilities on the Vega backend, alongside human-led product security auditing. Vega runs from the terminal via the Vega CLI (`vega`), which is distributed as an installable Agent Skill and an npm/global binary, authenticates with an API key or OAuth login, and exposes a project → repository → scan → finding drill-down. The team publishes vulnerability research (e.g. an nginx RCE, CVE-2026-42530) and positions "Audited by Nebula Security" as a product credibility marker.

Nebula Security is profiled on the APIs.io network. Tagged areas include Company, Security, Cybersecurity, Vulnerability Management, and Application Security.

Nebula Security’s developer surface includes engineering blog, documentation, API reference, getting-started guide, support, CLI, authentication, and 15 more developer resources.

🌐 Visit website 📡 Source on GitHub
23.0/100 emerging ▬ flat Agent 26/100 agent aware Full breakdown ↓
scored 2026-07-27 · rubric v0.5
AccessSelf serve
0 APIs
CompanySecurityCybersecurityVulnerability ManagementApplication SecurityCode ScanningArtificial IntelligenceDeveloper ToolsCLI

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 23.0/100 · emerging
Contract Quality 0.0 / 25
Developer Ergonomics 11.3 / 20
Commercial Clarity 4.2 / 20
Operational Transparency 0.7 / 13
Governance 0.0 / 12
Discoverability 6.8 / 10
Agent readiness — 26/100 · agent aware
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 15
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 0 / 6
Agent Skills 5 / 5
Well-Known Catalog 4 / 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/nebula-security: 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 2

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

Nebula Security Authentication

apiKey/oauth2 · 2 schemes

SECURITY

Nebula Security Domain Security

TLSv1.3 · DMARC

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

GettingStarted
GettingStarted

Documentation 2

Reference material describing how the API behaves

Documentation
Documentation
 APIReference
APIReference

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

AgentSkill
AgentSkill
 WellKnown
WellKnown
 LLMsTxt
LLMsTxt

Design & Contract 3

Pagination, idempotency, versioning, errors, and events

Conventions
Conventions
 ErrorCatalog
ErrorCatalog
 DataModel
DataModel

Build 3

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization
 CLI
CLI
 Packages
Packages

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity
 Authentication
Authentication

Operate 1

Status, limits, changes, and where to get help

Support
Support

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy

Company 5

The organization behind the API

Website
Website
 About
About
 Blog
Blog
 Twitter
Twitter
 LinkedIn
LinkedIn

Source (apis.yml)

apis.yml Raw ↑ 
aid: nebula-security
name: Nebula Security
description: Nebula Security is an AI-native cybersecurity company backed by Y Combinator (S26) and founded by world-class
  hackers — members of a top CTF team, DEF CON winners, Black Hat speakers, and cybersecurity PhDs. Its product, Vega, is
  an AI security agent that audits codebases for vulnerabilities on the Vega backend, alongside human-led product security
  auditing. Vega runs from the terminal via the Vega CLI (`vega`), which is distributed as an installable Agent Skill and
  an npm/global binary, authenticates with an API key or OAuth login, and exposes a project → repository → scan → finding
  drill-down. The team publishes vulnerability research (e.g. an nginx RCE, CVE-2026-42530) and positions "Audited by Nebula
  Security" as a product credibility marker.
url: https://raw.githubusercontent.com/api-evangelist/nebula-security/refs/heads/main/apis.yml
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://nebusec.ai/nebusec-social.png
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: '2026-07-20'
tags:
- Company
- Security
- Cybersecurity
- Vulnerability Management
- Application Security
- Code Scanning
- Artificial Intelligence
- Developer Tools
- CLI
apis: []
common:
- type: DomainSecurity
  url: security/nebula-security-domain-security.yml
- type: Website
  url: https://nebusec.ai
- type: About
  url: https://nebusec.ai/about
- type: Blog
  url: https://nebusec.ai/research
- type: Documentation
  url: https://github.com/NebuSec/vega-skill/blob/main/README.md
- type: APIReference
  url: https://github.com/NebuSec/vega-skill/blob/main/skills/vega-cli/SKILL.md
- type: GettingStarted
  url: https://github.com/NebuSec/vega-skill#getting-started
- type: GitHubOrganization
  url: https://github.com/NebuSec
- type: Support
  url: mailto:info@nebusec.ai
- type: TermsOfService
  url: https://nebusec.ai/terms/
- type: PrivacyPolicy
  url: https://nebusec.ai/privacy/
- type: Twitter
  url: https://x.com/nebusecurity
- type: LinkedIn
  url: https://www.linkedin.com/company/125323912/
- type: AgentSkill
  name: Vega CLI Agent Skill
  url: skills/nebula-security-vega-cli.md
- type: CLI
  url: cli/nebula-security-cli.yml
- type: Packages
  url: packages/nebula-security-packages.yml
- type: Authentication
  url: authentication/nebula-security-authentication.yml
- type: Conventions
  url: conventions/nebula-security-conventions.yml
- type: ErrorCatalog
  url: errors/nebula-security-error-codes.yml
- type: DataModel
  url: data-model/nebula-security-data-model.yml
- type: WellKnown
  url: well-known/nebula-security-well-known.yml
- type: LLMsTxt
  url: llms/nebula-security-llms.txt
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-20'
  status: enriched
  artifacts_added: 11
  pass: local-v1