Nucleus Security

Nucleus Security is a risk-based vulnerability and exposure management platform that unifies findings from across an organization's scanning estate - network, application, cloud, container and penetration-test tooling - into a single normalized view, then prioritizes and automates remediation against it. The platform ingests from roughly thirty first-party connectors (Tenable, Qualys, Rapid7, Snyk, Checkmarx, Crowdstrike, Orca, Prisma and others), enriches findings with threat intelligence including CISA KEV, EPSS, CVSS v3/v4 and Nucleus Insights exploitation signals, and drives remediation through ServiceNow, Jira and other ticketing systems. Programmatic access is a first-class deployment model: every platform capability is exposed through an API-key-authenticated REST API documented in-console with Swagger, and Nucleus ships a hosted Model Context Protocol server so AI clients can query Nucleus data under the same RBAC and Asset Group Access Control enforced in the UI. Nucleus also publishes an open, unauthenticated vulnerability intelligence API on its corporate domain, and a FedRAMP Moderate government offering, NucleusGov.

Nucleus Security publishes 2 APIs on the APIs.io network. Tagged areas include Company, Security, Cybersecurity, Vulnerability Management, and Exposure Management.

Nucleus Security’s developer surface includes documentation, API reference, getting-started guide, support, engineering blog, pricing, authentication, and 25 more developer resources.

🌐 Visit website 📡 Source on GitHub

31.3/100 thin ▬ flat Agent 26/100 agent aware Front door AI 6/6 dominant saas Full breakdown ↓
scored 2026-09-24 · rubric v0.22.0

AccessApproval

2 APIs 1 MCP Servers

Company Security Cybersecurity Vulnerability Management Exposure Management Risk Management Threat Intelligence Compliance DevSecOps MCP

Kin Score

Kin Score How this is scored →
scored 2026-09-24 · rubric v0.22.0

Composite quality — 31.3/100 · thin

Contract Quality 0.0 / 23

Developer Ergonomics 8.9 / 18

Access Clarity 8.5 / 18

Operational Transparency 3.4 / 12

Contract Governance 2.0 / 11

Discoverability 6.0 / 9

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 26/100 · agent aware

Machine-Readable Contract 0 / 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 6 / 6

Protected Resource Metadata 5 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

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.

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/nucleus-security: 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 3

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

Nucleus Security Platform REST API

The Nucleus platform API. Every platform capability is exposed over REST, documented with Swagger inside the authenticated customer console, and authenticated with a static API ...

Nucleus MCP Server

Hosted remote Model Context Protocol server included with the Nucleus platform, reachable at a per-tenant URL. Exposes project, asset, finding/vulnerability and Nucleus Query La...

Nucleus Security Website (WordPress REST)

The public WordPress REST API (wp-json) of the Nucleus Security website at nucleussec.com: the route index of the site's content management system, catalogued as one site surfac...

MCP Servers 1

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

Nucleus Security MCP Servers

Nucleus Security operates TWO distinct, real, remote Model Context Protocol servers. The product server is a documented per-tenant endpoint on the customer's own Nucleus instanc...

MCP SERVER

Pricing Plans 1

Published pricing tiers and plan structures.

Nucleus Security Plans Pricing

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Nucleus Security Rate Limits

0 limits

RATE LIMITS

Security Posture 4

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

Nucleus Security Authentication

0 schemes

SECURITY

Nucleus Security Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Nucleus Security Vulnerability Disclosure

Hackerone · contact published

SECURITY

Nucleus Security Trust Center

SOC 2 Type II, FedRAMP Moderate, NIST CSF, CISA Secure by Design Pledge

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Nucleus Security Scopes

1 scope

1 scopes

SCOPES

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 4

MCP servers, agent skills, and machine-readable catalogs

WellKnown

MCPServer

LLMsTxt

AgentSkill

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Conventions

Conformance

ErrorCatalog

Lifecycle

DataModel

Build 3

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Packages

Packages

ToolCrosswalk

ToolCrosswalk

Access & Security 8

Authentication, authorization, and security posture

Security

Security

Compliance

Compliance

TrustCenter

TrustCenter

VulnerabilityDisclosure

VulnerabilityDisclosure

SecurityTxt

DomainSecurity

OAuthScopes

Authentication

Scroll for all 8

Operate 3

Status, limits, changes, and where to get help

Support

Support

StatusPage

StatusPage

RateLimits

RateLimits

Commercial 4

Pricing, plans, and the legal terms of use

Pricing

TermsOfService

PrivacyPolicy

Plans

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: nucleus-security
name: Nucleus Security
description: 'Nucleus Security is a risk-based vulnerability and exposure management platform that unifies findings from across
  an organization''s scanning estate - network, application, cloud, container and penetration-test tooling - into a single
  normalized view, then prioritizes and automates remediation against it. The platform ingests from roughly thirty first-party
  connectors (Tenable, Qualys, Rapid7, Snyk, Checkmarx, Crowdstrike, Orca, Prisma and others), enriches findings with threat
  intelligence including CISA KEV, EPSS, CVSS v3/v4 and Nucleus Insights exploitation signals, and drives remediation through
  ServiceNow, Jira and other ticketing systems. Programmatic access is a first-class deployment model: every platform capability
  is exposed through an API-key-authenticated REST API documented in-console with Swagger, and Nucleus ships a hosted Model
  Context Protocol server so AI clients can query Nucleus data under the same RBAC and Asset Group Access Control enforced
  in the UI. Nucleus also publishes an open, unauthenticated vulnerability intelligence API on its corporate domain, and a
  FedRAMP Moderate government offering, NucleusGov.'
url: https://raw.githubusercontent.com/api-evangelist/nucleus-security/refs/heads/main/apis.yml
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: approval
  trial: false
  try_now: false
  public: false
  label: Requires approval
  confidence: medium
  source:
  - plans
  - authentication
  - scopes
  - rate-limits
  - security
  generated: '2026-09-03'
  method: derived
image: https://nucleussec.com/wp-content/uploads/2024/12/cropped-Nucleus-Full-Color-Logo-270x270.png
x-type: company
x-source: harvest:secondary-market
specificationVersion: '0.20'
created: '2026-08-26'
modified: '2026-08-26'
tags:
- Company
- Security
- Cybersecurity
- Vulnerability Management
- Exposure Management
- Risk Management
- Threat Intelligence
- Compliance
- DevSecOps
- MCP
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
apis:
- name: Nucleus Security Platform REST API
  description: The Nucleus platform API. Every platform capability is exposed over REST, documented with Swagger inside the
    authenticated customer console, and authenticated with a static API key in an x-apikey header. The base URL is templated
    per tenant - the instance name is the customer's own subdomain. Publicly documented operations cover project-scoped metrics,
    findings search, finding processing rules, bulk data export and async job polling.
  humanURL: https://help.nucleussec.com/docs/api-access
  baseURL: https://[instance-name].nucleussec.com/nucleus/api
  tags:
  - Vulnerability Management
  - Findings
  - Assets
  - Metrics
  properties:
  - type: Documentation
    url: https://help.nucleussec.com/docs/api-access
  - type: Authentication
    url: authentication/nucleus-security-authentication.yml
  - type: Conventions
    url: conventions/nucleus-security-conventions.yml
  - type: Lifecycle
    url: lifecycle/nucleus-security-lifecycle.yml
- name: Nucleus MCP Server
  description: Hosted remote Model Context Protocol server included with the Nucleus platform, reachable at a per-tenant URL.
    Exposes project, asset, finding/vulnerability and Nucleus Query Language tools to AI clients over OAuth, enforcing the
    same RBAC and Asset Group Access Control as the console, evaluated at query time. Tested by the provider with ChatGPT,
    Claude and Augment Code.
  humanURL: https://nucleussec.com/platform/mcp-server/
  baseURL: https://[your-nucleus-instance].nucleussec.com/nucleus/mcp
  tags:
  - MCP
  - Artificial Intelligence
  - Agents
  tags_raw:
  - MCP
  - AI
  - Agents
  properties:
  - type: MCPServer
    url: mcp/nucleus-security-mcp.yml
  - type: ToolCrosswalk
    url: mcp/nucleus-security-tool-crosswalk.yml
  - type: Documentation
    url: https://help.nucleussec.com/docs/nucleus-mcp-server
- aid: nucleus-security:nucleussec-com-website-wordpress-rest
  name: Nucleus Security Website (WordPress REST)
  description: 'The public WordPress REST API (wp-json) of the Nucleus Security website at nucleussec.com: the route index
    of the site''s content management system, catalogued as one site surface rather than as separate APIs.'
  baseURL: https://nucleussec.com/wp-json
  tags:
  - WordPress
  x-surface: platform-generated
  properties:
  - type: Documentation
    url: https://nucleussec.com/wp-json
  x-platform: wordpress
  x-platform-surface: rest
common:
- type: Website
  url: https://nucleussec.com/
- type: Documentation
  url: https://help.nucleussec.com/
- type: APIReference
  url: https://help.nucleussec.com/docs/api-access
- type: GettingStarted
  url: https://help.nucleussec.com/docs/quickstart
- type: Support
  url: https://nucleussec.atlassian.net/servicedesk/customer/portal/3
- type: Blog
  url: https://nucleussec.com/blog/
- type: GitHubOrganization
  url: https://github.com/nucleus-security
- type: Pricing
  url: https://nucleussec.com/get-pricing/
- type: TermsOfService
  url: https://nucleussec.com/legal/msa/
- type: PrivacyPolicy
  url: https://nucleussec.com/privacy-policy/
- type: StatusPage
  url: https://status.nucleussec.com/
- type: Security
  url: security/nucleus-security-vulnerability-disclosure.yml
- type: Compliance
  url: security/nucleus-security-trust-center.yml
- type: TrustCenter
  url: security/nucleus-security-trust-center.yml
- type: VulnerabilityDisclosure
  url: security/nucleus-security-vulnerability-disclosure.yml
- type: SecurityTxt
  url: well-known/nucleus-security-security.txt
- type: DomainSecurity
  url: security/nucleus-security-domain-security.yml
- type: WellKnown
  url: well-known/nucleus-security-well-known.yml
- type: OAuthScopes
  url: scopes/nucleus-security-scopes.yml
- type: Authentication
  url: authentication/nucleus-security-authentication.yml
- type: Conventions
  url: conventions/nucleus-security-conventions.yml
- type: Conformance
  url: conformance/nucleus-security-conformance.yml
- type: ErrorCatalog
  url: errors/nucleus-security-problem-types.yml
- type: Lifecycle
  url: lifecycle/nucleus-security-lifecycle.yml
- type: Plans
  url: plans/nucleus-security-plans-pricing.yml
- type: RateLimits
  url: rate-limits/nucleus-security-rate-limits.yml
- type: Packages
  url: packages/nucleus-security-packages.yml
- type: DataModel
  url: data-model/nucleus-security-data-model.yml
- type: MCPServer
  url: mcp/nucleus-security-mcp.yml
- type: ToolCrosswalk
  url: mcp/nucleus-security-tool-crosswalk.yml
- type: LLMsTxt
  url: llms/nucleus-security-llms.txt
- type: AgentSkill
  url: skills/_index.yml
x-enrichment:
  date: '2026-08-26'
  status: enriched
  artifacts_added: 27
  pass: local-v1

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