VulnCheck

VulnCheck is an exploit and vulnerability intelligence company that supplies machine-readable data on known exploited vulnerabilities, exploit maturity, threat-actor activity, initial-access exploitation, IP and target intelligence, CPE/PURL identity and vendor advisories. Its Exploit & Vulnerability Intelligence platform enriches CVE records ahead of NIST NVD, publishes the VulnCheck KEV catalog, and exposes everything through a 521-operation REST API at api.vulncheck.com/v3 covering 490+ named indices, alongside a Go SDK, Python SDK, a scripting/agent-oriented CLI, an MCP server and a published Claude Code agent skill. A free Community tier provides VulnCheck KEV and NVD++ data.

VulnCheck publishes 1 API on the APIs.io network. Tagged areas include Company, Security, Vulnerability Intelligence, Exploit Intelligence, and Threat Intelligence.

VulnCheck’s developer surface includes documentation, API reference, getting-started guide, signup flow, support, engineering blog, changelog, and 22 more developer resources.

🌐 Visit website 📡 Source on GitHub
49.7/100 developing Agent 28/100 agent aware Full breakdown ↓
scored 2026-09-04 · rubric v0.18.3
1 APIs 1 MCP Servers
CompanySecurityVulnerability IntelligenceExploit IntelligenceThreat IntelligenceCybersecurityCVEVulnerability ManagementData

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-09-04 · rubric v0.18.3
Composite quality — 49.7/100 · developing
Contract Quality 6.7 / 25
Developer Ergonomics 15.7 / 20
Access Clarity 11.1 / 20
Operational Transparency 8.9 / 13
Contract Governance 0.5 / 12
Discoverability 6.9 / 10
Agent readiness — 28/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 0 / 10
Documented Reversibility 0 / 6
MCP Server 12 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 8 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 7 / 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
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 github.com/api-evangelist/vulncheck: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 1

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

VulnCheck API

Version 3 of the VulnCheck API. A read-only REST API exposing VulnCheck's exploit and vulnerability intelligence: 490+ named indices browsable at /index/{name}, CVE and CPE sear...

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

VulnCheck MCP Server

MCP SERVER

Pricing Plans 1

Published pricing tiers and plan structures.

Vulncheck Plans Pricing

1 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Vulncheck Rate Limits

1 limits

RATE LIMITS

Security Posture 3

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

Vulncheck Authentication

apiKey · 3 schemes

SECURITY

Vulncheck Domain Security

TLSv1.3 · DMARC

SECURITY

Vulncheck Vulnerability Disclosure

security.txt · contact published

SECURITY

Resources

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal
DeveloperPortal
 GettingStarted
GettingStarted
 SignUp
SignUp
 Login
Login

Documentation 2

Reference material describing how the API behaves

Documentation
Documentation
 APIReference
APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

WellKnown
WellKnown
 MCPServer
MCPServer
 AgentSkill
AgentSkill
 LLMsTxt
LLMsTxt

Design & Contract 2

Pagination, idempotency, versioning, errors, and events

Lifecycle
Lifecycle
 Conformance
Conformance

Build 4

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization
 Packages
Packages
 SDKs
SDKs
 CLI
CLI

Access & Security 4

Authentication, authorization, and security posture

Security
Security
 SecurityTxt
SecurityTxt
 VulnerabilityDisclosure
VulnerabilityDisclosure
 DomainSecurity
DomainSecurity

Operate 4

Status, limits, changes, and where to get help

Support
Support
 StatusPage
StatusPage
 ChangeLog
ChangeLog
 RateLimits
RateLimits

Commercial 3

Pricing, plans, and the legal terms of use

TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy
 Plans
Plans

Company 2

The organization behind the API

Website
Website
 Blog
Blog

Source (apis.yml)

apis.yml Raw ↑ 
aid: vulncheck
name: VulnCheck
description: VulnCheck is an exploit and vulnerability intelligence company that supplies machine-readable data on known exploited
  vulnerabilities, exploit maturity, threat-actor activity, initial-access exploitation, IP and target intelligence, CPE/PURL
  identity and vendor advisories. Its Exploit & Vulnerability Intelligence platform enriches CVE records ahead of NIST NVD,
  publishes the VulnCheck KEV catalog, and exposes everything through a 521-operation REST API at api.vulncheck.com/v3 covering
  490+ named indices, alongside a Go SDK, Python SDK, a scripting/agent-oriented CLI, an MCP server and a published Claude
  Code agent skill. A free Community tier provides VulnCheck KEV and NVD++ data.
image: https://www.vulncheck.com/logo.png
url: https://raw.githubusercontent.com/api-evangelist/vulncheck/refs/heads/main/apis.yml
x-type: company
x-source: harvest:secondary-market
specificationVersion: '0.20'
created: '2026-09-04'
modified: '2026-09-04'
tags:
- Company
- Security
- Vulnerability Intelligence
- Exploit Intelligence
- Threat Intelligence
- Cybersecurity
- CVE
- Vulnerability Management
- Data
apis:
- aid: vulncheck-api
  name: VulnCheck API
  description: 'Version 3 of the VulnCheck API. A read-only REST API exposing VulnCheck''s exploit and vulnerability intelligence:
    490+ named indices browsable at /index/{name}, CVE and CPE search, PURL vulnerability lookup, initial-access detection
    rules (Suricata and Snort), VulnCheck C2 hostname and tag feeds, entitlements, and pre-signed offline backup downloads.
    Bearer token authentication; all 521 operations are GET.'
  humanURL: https://docs.vulncheck.com/api
  baseURL: https://api.vulncheck.com/v3
  image: https://www.vulncheck.com/logo.png
  tags:
  - Vulnerability Intelligence
  - Exploit Intelligence
  - CVE
  - Security
  properties:
  - type: OpenAPI
    url: openapi/vulncheck-api-openapi.json
  - type: Documentation
    url: https://docs.vulncheck.com/api
  - type: Authentication
    url: authentication/vulncheck-authentication.yml
  - type: RateLimits
    url: rate-limits/vulncheck-rate-limits.yml
  - type: ErrorCatalog
    url: errors/vulncheck-problem-types.yml
  - type: Conventions
    url: conventions/vulncheck-conventions.yml
  - type: DataModel
    url: data-model/vulncheck-data-model.yml
  - type: Overlay
    url: overlays/vulncheck-api-overlay.yaml
  - type: ToolCrosswalk
    url: mcp/vulncheck-tool-crosswalk.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://www.vulncheck.com/
- type: DeveloperPortal
  url: https://docs.vulncheck.com/
- type: Documentation
  url: https://docs.vulncheck.com/
- type: APIReference
  url: https://docs.vulncheck.com/api
- type: GettingStarted
  url: https://docs.vulncheck.com/getting-started
- type: SignUp
  url: https://console.vulncheck.com/register
- type: Login
  url: https://console.vulncheck.com/login
- type: Support
  url: https://www.vulncheck.com/contact
- type: Blog
  url: https://www.vulncheck.com/blog
- type: GitHubOrganization
  url: https://github.com/vulncheck-oss
- type: TermsOfService
  url: https://www.vulncheck.com/terms
- type: PrivacyPolicy
  url: https://www.vulncheck.com/privacy
- type: StatusPage
  url: https://status.vulncheck.com/
- type: ChangeLog
  url: https://docs.vulncheck.com/changelog
- type: Security
  url: https://www.vulncheck.com/vulnerability-disclosure-policy
- type: SecurityTxt
  url: well-known/vulncheck-security.txt
- type: WellKnown
  url: well-known/vulncheck-well-known.yml
- type: VulnerabilityDisclosure
  url: security/vulncheck-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/vulncheck-domain-security.yml
- type: Packages
  url: packages/vulncheck-packages.yml
- type: SDKs
  url: packages/vulncheck-packages.yml
- type: CLI
  url: cli/vulncheck-cli.yml
- type: MCPServer
  url: mcp/vulncheck-mcp.yml
- type: AgentSkill
  url: skills/_index.yml
- type: LLMsTxt
  url: llms/vulncheck-llms.txt
- type: Lifecycle
  url: lifecycle/vulncheck-lifecycle.yml
- type: Conformance
  url: conformance/vulncheck-conformance.yml
- type: Plans
  url: plans/vulncheck-plans-pricing.yml
- type: RateLimits
  url: rate-limits/vulncheck-rate-limits.yml
x-enrichment:
  date: '2026-09-04'
  status: enriched
  artifacts_added: 26
  pass: local-v3

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