Koi Security

Koi (formerly Koi Security, now operating as koi.ai) is an endpoint security platform built for non-binary software — browser extensions, IDE and editor extensions, open-source packages, MCP servers, AI models, AI agents, and containers — the install surface that traditional EDR and MDM tooling was never designed to govern. The platform ships three products: Koi Endpoint (agentless discovery and governance of every binary and non-binary install across macOS, Windows, and Linux), Koi Wings (continuous risk evaluation of code, behavior, publisher ownership changes, and update channels), and Koi Gateway (a network-based gate in front of marketplaces, app stores, and registries). Koi is widely known for the security research it publishes on software supply-chain attacks including GlassWorm, Shai-Hulud, PhantomRaven, GreedyBear, and the first malicious MCP server found in the wild. Koi also operates ExtensionTotal, a free community risk-scoring service for Visual Studio Code extensions that exposes a public HTTP API and a first-party VS Code extension. Koi raised $48M and has been acquired by Palo Alto Networks.

Koi Security publishes 1 API contract indexed on the APIs.io network: Risk API. Tagged areas include Company, Security, Endpoint Security, Supply Chain Security, and Browser Extension.

The Koi Security catalog on APIs.io includes 1 Spectral governance ruleset.

Koi Security’s developer surface includes documentation, API reference, engineering blog, signup flow, support, authentication, and 23 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

36.3/100 thin ▬ flat Agent 27/100 agent aware Front door AI 6/6 dominant open core · MIT Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

1 published contract 1 Agent Skills

Company Security Endpoint Security Supply Chain Security Browser Extension Developer Tools Threat Intelligence MCP Security Risk Scoring

What this lets a business do 1

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

Cybersecurity Management

BC-620

Risk

POST /getExtensionRisk

Kin Score

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

Composite quality — 36.3/100 · thin

Contract Quality 8.8 / 16

Developer Ergonomics 3.6 / 13

Access Clarity 4.4 / 13

Operational Transparency 0.9 / 8

Contract Governance 1.4 / 8

Discoverability 4.8 / 7

Regulatory Posture 3.7 / 15

Open Source Surface 2.5 / 10

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 27/100 · 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 7 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 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.

Open Source Surface applies to this provider. This product is open source and we read its repository directly, so Open Source Surface carries 10 points of the composite. It is scored from what the repository actually publishes — a security policy, a contribution guide, a release history, a code of conduct — read live from the provider rather than inferred from our own catalog pointers. This facet adds; nothing was taken away to make room for it. An open-source project is not excused from the commercial facets, because exemption would strip it of the points it does earn. If we have the wrong repository, or this product is not open source, say so on your provider repo and we will drop the facet rather than have you publish against it.

Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 65 points between them, because both conditional facets apply and carry 35 points together. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 65% 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)
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document

8 more unmet checks in the Agent Readiness table above.

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

Developer Ergonomics scores 28.0 — up to +14.4 composite points
Access Clarity scores 34.2 — up to +13.2 composite points
Operational Transparency scores 10.5 — up to +11.6 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/koi-security/apis.yml: open an issue on github.com/api-evangelist/koi-security 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.

Koi Security Risk API

Extension risk assessment.

Open Collections 1

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

ExtensionTotal Risk API

OPEN COLLECTION

Agent Skills 1

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

Screen a VS Code extension for risk with ExtensionTotal

AGENT SKILL

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Koi Security API Rules

64 rules · 62 errors 1 warnings 1 info

SPECTRAL

OpenAPI Overlays 1

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

Koi Security Extensiontotal Overlay

3 actions · update · koi-security-extensiontotal-openapi.yml

DERIVED

Security Posture 2

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

Koi Security Authentication

apiKey · 1 scheme

SECURITY

Koi Security Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

SignUp

SignUp

Documentation 3

Reference material describing how the API behaves

ContributionGuide

ContributionGuide

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

WellKnown

WellKnown

X-MCPServerCandidate

X-MCPServerCandidate

LLMsTxt

LLMsTxt

AgentSkill

AgentSkill

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Lifecycle

Conventions

ErrorCatalog

Conformance

DataModel

Build 2

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Packages

Packages

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 3

Status, limits, changes, and where to get help

IssueTracker

IssueTracker

Support

Support

StatusPage

StatusPage

Commercial 3

Pricing, plans, and the legal terms of use

License

License

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

CapabilityMap

CapabilityMap

ParentCompany

ParentCompany

Overlay

Overlay

Source (apis.yml)

aid: koi-security
name: Koi Security
description: 'Koi (formerly Koi Security, now operating as koi.ai) is an endpoint security platform built for non-binary software
  — browser extensions, IDE and editor extensions, open-source packages, MCP servers, AI models, AI agents, and containers
  — the install surface that traditional EDR and MDM tooling was never designed to govern. The platform ships three products:
  Koi Endpoint (agentless discovery and governance of every binary and non-binary install across macOS, Windows, and Linux),
  Koi Wings (continuous risk evaluation of code, behavior, publisher ownership changes, and update channels), and Koi Gateway
  (a network-based gate in front of marketplaces, app stores, and registries). Koi is widely known for the security research
  it publishes on software supply-chain attacks including GlassWorm, Shai-Hulud, PhantomRaven, GreedyBear, and the first malicious
  MCP server found in the wild. Koi also operates ExtensionTotal, a free community risk-scoring service for Visual Studio
  Code extensions that exposes a public HTTP API and a first-party VS Code extension. Koi raised $48M and has been acquired
  by Palo Alto Networks.'
deliveryModel:
  model: open-core
  license: MIT
  open_source: true
  commercial: true
  callable_host: true
  label: Open core · an OSS project plus a commercial hosted product
  confidence: high
  source:
  - license
  - openapi
  - 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
  - url: https://www.koi.ai/
    status: 301
    note: declared website redirects to https://www.paloaltonetworks.com/cortex/agentic-endpoint-security — a different registrable
      domain (koi.ai -> paloaltonetworks.com), possible rename or acquisition (probed 2026-09-03, roadmap#169)
  generated: '2026-11-06'
  method: derived
image: https://cdn.prod.website-files.com/67bf17e426d92bdda54af956/689d7637775a71fd67d69618_link%20image.png
url: https://raw.githubusercontent.com/api-evangelist/koi-security/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- battery-ventures
x-acquired-by: palo-alto-networks
x-tier: profiled
x-tier-reason: public-api-and-artifacts
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-19'
x-docs-platform: gitbook
x-docs-platform-confidence: high
x-docs-platform-checked: 2026-10-03
tags:
- Company
- Security
- Endpoint Security
- Supply Chain Security
- Browser Extension
- Developer Tools
- Threat Intelligence
- MCP Security
- Risk Scoring
tags_raw:
- Company
- Security
- Endpoint Security
- Supply Chain Security
- Browser Extensions
- Developer Tools
- Threat Intelligence
- MCP Security
- Risk Scoring
apis:
- aid: koi-security:koi-security-risk-api
  name: Koi Security Risk API
  description: Extension risk assessment.
  humanURL: https://www.koi.ai/blog/6-6-uncover-hidden-risks-cisos-guide-to-using-extensiontotal-api-for-your-organization
  baseURL: https://app.extensiontotal.com/api
  tags:
  - Risk Management
  tags_raw:
  - Risk
  properties:
  - type: OpenAPI
    url: openapi/koi-security-risk-api-openapi.yml
  - type: Documentation
    url: https://www.koi.ai/blog/6-6-uncover-hidden-risks-cisos-guide-to-using-extensiontotal-api-for-your-organization
  - type: SourceCode
    url: https://github.com/extensiontotal/extensiontotal-vscode
common:
- type: CapabilityMap
  url: capabilities/koi-security-capability-edges.yml
  name: Koi Security Business Capability Map
- type: ParentCompany
  url: https://apis.io/providers/palo-alto-networks/
  name: Palo Alto Networks
  x-relationship: acquired
  x-evidence: Koi raised $48M and has been acquired by Palo Alto Networks.
- type: Overlay
  url: overlays/koi-security-extensiontotal-overlay.yaml
- type: IssueTracker
  url: https://github.com/extensiontotal/extensiontotal-vscode/issues
- type: ContributionGuide
  url: https://github.com/extensiontotal/extensiontotal-vscode/blob/main/.github/CONTRIBUTING.md
- type: License
  name: MIT
  url: https://github.com/extensiontotal/extensiontotal-vscode/blob/main/LICENSE
- type: Website
  url: https://www.koi.ai/
- type: DeveloperPortal
  url: https://docs.koi.ai/
- type: Documentation
  url: https://docs.koi.ai/
- type: APIReference
  url: https://www.koi.ai/blog/6-6-uncover-hidden-risks-cisos-guide-to-using-extensiontotal-api-for-your-organization
- type: Blog
  url: https://www.koi.ai/blog
- type: GitHubOrganization
  url: https://github.com/koi-security
- type: SignUp
  url: https://www.koi.ai/get-a-demo
- type: Support
  url: https://www.koi.ai/chat-with-us
- type: TermsOfService
  url: https://www.koi.ai/terms-and-conditions
- type: PrivacyPolicy
  url: https://www.koi.ai/privacy-policy
- type: StatusPage
  url: https://status.koi.ai/
- type: Lifecycle
  url: lifecycle/koi-security-lifecycle.yml
- type: Authentication
  url: authentication/koi-security-authentication.yml
- type: Conventions
  url: conventions/koi-security-conventions.yml
- type: ErrorCatalog
  url: errors/koi-security-problem-types.yml
- type: Conformance
  url: conformance/koi-security-conformance.yml
- type: DataModel
  url: data-model/koi-security-data-model.yml
- type: Packages
  url: packages/koi-security-packages.yml
- type: WellKnown
  url: well-known/koi-security-well-known.yml
- type: DomainSecurity
  url: security/koi-security-domain-security.yml
- type: X-MCPServerCandidate
  url: mcp/koi-security-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- type: LLMsTxt
  url: llms/koi-security-llms.txt
- type: AgentSkill
  url: skills/_index.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

Koi Security API — frequently asked questions

Does Koi Security have an API?

Yes. APIs.io lists 1 API from Koi Security, including Koi Security Risk API.

Is there an OpenAPI specification for the Koi Security API?

Yes. APIs.io indexes 1 OpenAPI specification for Koi Security, each linked for download from this page.

How do I authenticate with the Koi Security API?

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

Is the Koi Security API ready for AI agents?

Koi Security has a Kin Score of 36.3 out of 100 (thin) and an Agent Readiness score of 27.2 (agent-aware), scored by API Evangelist on 2026-11-06.

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