Apex (Apex Security)

Apex Security was an AI security startup founded in 2023 in Tel Aviv by Matan Derman (CEO) and Tomer Avni (CPO), backed by Sequoia Capital, Index Ventures and angel investors including Sam Altman. Its platform gave enterprises visibility into generative-AI and LLM usage — public tools like ChatGPT and Gemini, Microsoft Copilot, and in-house AI applications — then let them define policy, detect violations and shadow AI, and respond to attacks across the AI attack surface. Tenable announced its intent to acquire Apex on 2025-05-29 and closed the acquisition in June 2025 for approximately $47.8M; the technology was folded into the Tenable One exposure management platform and now ships as Tenable One AI Exposure. Apex no longer operates as an independent company: the apexhq.ai domain has lapsed and was re-registered by an unrelated party on 2026-05-13, and now serves a Namecheap parking page. There is no Apex developer portal, documentation, or public API surface to catalog.

Apex (Apex Security) is profiled on the APIs.io network. Tagged areas include Company, Security, Artificial Intelligence, AI Security, and LLM Security.

Apex (Apex Security)’s developer surface includes pricing and 5 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

9.9/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessPaid

0 APIs

Company Security Artificial Intelligence AI Security LLM Security Exposure Management Acquired Israel

Kin Score

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

Composite quality — 9.9/100 · minimal

Contract Quality 0.0 / 21

Developer Ergonomics 0.0 / 17

Access Clarity 6.3 / 17

Operational Transparency 0.0 / 11

Contract Governance 0.0 / 10

Discoverability 4.1 / 9

Regulatory Posture 0.0 / 15

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

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

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.

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% 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):

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
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
Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey)
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)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes

13 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 0.0 — up to +25.0 composite points
Developer Ergonomics scores 0.0 — up to +20.0 composite points
Operational Transparency scores 0.0 — up to +13.0 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/apex/apis.yml: open an issue on github.com/api-evangelist/apex 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 →

Apex (Apex Security) API pricing

Prices published by Apex (Apex Security), read 2026-10-07 from www.tenable.com/products/tenable-one/pricing.

Plan	Price
Tenable One Foundation	Request a quote Includes: Vulnerability management, web application security, OT & IoT security, attack surface management, AI
Tenable One Advanced	Request a quote Includes: Adds risk measurement, orchestrated remediation, attack path analysis, holistic cloud security
Tenable One Vulnerability Management - 1 Year (100 assets)	$3,500 Includes: Includes Tenable One Web App Scanning trial
Tenable One Vulnerability Management - 2 Years	$6,825
Tenable One Vulnerability Management - 3 Years	$9,975
Tenable One Web App Scanning (5 FQDNs)	$3,578
Nessus Professional - 1 Year	$4,790
Nessus Professional - 2 Years	$9,330.95

All 15 plans, limits and sources →

Pricing Plans 1

Published pricing tiers and plan structures.

Apex Plans Pricing

15 plans

PLANS

Resources

Commercial 2

Pricing, plans, and the legal terms of use

Pricing

Pricing

Plans

Plans

Company 2

The organization behind the API

Website

Website

InvestorProfile

InvestorProfile

Other 2

Properties that don't map to a standard resource type

Acquisition

Acquisition

SuccessorProduct

SuccessorProduct

Source (apis.yml)

aid: apex
deliveryModel:
  model: unknown
  open_source: false
  commercial: false
  callable_host: false
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - none
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: paid
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Paid
  confidence: low
  source:
  - plans
  generated: '2026-11-06'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/apex.png
name: Apex (Apex Security)
description: 'Apex Security was an AI security startup founded in 2023 in Tel Aviv by Matan Derman (CEO) and Tomer Avni (CPO),
  backed by Sequoia Capital, Index Ventures and angel investors including Sam Altman. Its platform gave enterprises visibility
  into generative-AI and LLM usage — public tools like ChatGPT and Gemini, Microsoft Copilot, and in-house AI applications
  — then let them define policy, detect violations and shadow AI, and respond to attacks across the AI attack surface. Tenable
  announced its intent to acquire Apex on 2025-05-29 and closed the acquisition in June 2025 for approximately $47.8M; the
  technology was folded into the Tenable One exposure management platform and now ships as Tenable One AI Exposure. Apex no
  longer operates as an independent company: the apexhq.ai domain has lapsed and was re-registered by an unrelated party on
  2026-05-13, and now serves a Namecheap parking page. There is no Apex developer portal, documentation, or public API surface
  to catalog.'
url: https://raw.githubusercontent.com/api-evangelist/apex/refs/heads/main/apis.yml
x-type: company
x-source: index-ventures-portfolio
x-tier: stub
x-tier-reason: acquired-no-api-surface
x-status: acquired
x-acquired-by: Tenable Holdings, Inc.
x-acquired-announced: '2025-05-29'
x-acquired-closed: 2025-06
x-successor-product: Tenable One AI Exposure
x-successor-url: https://www.tenable.com/products/ai-exposure
x-defunct-domain: apexhq.ai
x-defunct-domain-note: Lapsed after the Tenable acquisition; re-registered 2026-05-13 by an unrelated party and now serving
  a Namecheap parking page (HTTP 200, no company content). The apex root domain does not resolve to a live host; www.apexhq.ai
  returns the parking page and all subpaths 404.
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-19'
tags:
- Company
- Security
- Artificial Intelligence
- AI Security
- LLM Security
- Exposure Management
- Acquired
- Israel
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Pricing
  url: https://www.tenable.com/products/tenable-one/pricing
- type: Plans
  url: plans/apex-plans-pricing.yml
- type: Website
  url: https://www.tenable.com/
- type: Acquisition
  url: https://www.tenable.com/press-releases/tenable-announces-intent-to-acquire-apex-security-to-expand-exposure-management-across-the-ai-attack-surface
- type: SuccessorProduct
  url: https://www.tenable.com/products/ai-exposure
- type: InvestorProfile
  url: https://www.indexventures.com/companies/apex/
x-enrichment:
  date: '2026-07-19'
  status: nochange
  artifacts_added: 0
  pass: local-v1
  notes: 'Second pass re-verified the first and found nothing new. Company is defunct/acquired: Tenable announced intent 2025-05-29
    and closed June 2025; technology now ships as Tenable One AI Exposure. Re-probed 2026-07-19: apexhq.ai A=162.255.119.26
    only, and docs./developer./api.apexhq.ai have NO DNS records at all, so no API host exists. www.apexhq.ai serves a Namecheap
    parking page confirming the domain was re-registered by an unrelated party on 2026-05-13. Because the domain is no longer
    controlled by Apex, any content harvested from it would be MISATTRIBUTED to this company — a second, independent reason
    to write zero artifacts here beyond the absent API surface. No developer portal, docs, OpenAPI, packages, well-known,
    or event surface exists to enrich. Any successor API surface belongs in all/tenable/, not this repo. No artifacts written
    by design — writing any would be fabrication.'

Apex (Apex Security) API — frequently asked questions

How much does the Apex (Apex Security) API cost?

Apex (Apex Security) publishes its prices; its Tenable One Foundation plan is Request a quote as of 2026-10-07. APIs.io lists 15 pricing plans for Apex (Apex Security), with each plan's price, limits and inclusions under Pricing on this page.

Is the Apex (Apex Security) API ready for AI agents?

Apex (Apex Security) has a Kin Score of 9.9 out of 100 (minimal) and an Agent Readiness score of 0.0 (human-only), scored by API Evangelist on 2026-11-06.

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