Halcyon

Halcyon (Halcyon Tech, Inc.) is a cybersecurity company that builds a purpose-built, adaptive anti-ransomware and cyber-resilience platform. Its lightweight endpoint agent combines automated detection and disruption across the full ransomware attack lifecycle — pre-execution, encryption, and data exfiltration — with encryption-key recovery, a managed 24/7 Ransomware Operations Center (ROC), and a ransomware recovery warranty. Halcyon exposes a REST API for device/asset data and a universal API that streams alerts into SIEM, SOAR, and XDR platforms such as Splunk, Microsoft Sentinel, Google SecOps, Sumo Logic, and Exabeam, alongside backup integrations with Veeam, Cohesity, Acronis, and Commvault. Backed by Bain Capital Ventures and Obvious Ventures.

Halcyon publishes 1 API on the APIs.io network. Tagged areas include Company, Ai Infrastructure, Cybersecurity, Ransomware, and Endpoint Security.

Halcyon’s developer surface includes documentation, engineering blog, support, signup flow, and 8 more developer resources.

🌐 Visit website 📡 Source on GitHub

18.4/100 emerging ▬ flat Agent 0/100 human only saas Full breakdown ↓
scored 2026-08-30 · rubric v0.17.2

1 APIs

CompanyAi InfrastructureCybersecurity Ransomware Endpoint Security Threat Detection SIEM

Kin Score

Kin Score How this is scored →
scored 2026-08-30 · rubric v0.17.2

Composite quality — 18.4/100 · emerging

Contract Quality 0.0 / 25

Developer Ergonomics 0.5 / 20

Access Clarity 10.0 / 20

Operational Transparency 0.3 / 13

Contract Governance 0.0 / 12

Discoverability 7.6 / 10

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 Surface 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/. This rating is computed from github.com/api-evangelist/halcyon: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 1

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

Get Started 1

Portal, sign-up, and the first successful call

SignUp

SignUp

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 3

Authentication, authorization, and security posture

TrustCenter

TrustCenter

Compliance

Compliance

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 2

Pricing, plans, and the legal terms of use

PrivacyPolicy

PrivacyPolicy

TermsOfService

TermsOfService

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: halcyon
name: Halcyon
description: Halcyon (Halcyon Tech, Inc.) is a cybersecurity company that builds a purpose-built, adaptive anti-ransomware
  and cyber-resilience platform. Its lightweight endpoint agent combines automated detection and disruption across the full
  ransomware attack lifecycle — pre-execution, encryption, and data exfiltration — with encryption-key recovery, a managed
  24/7 Ransomware Operations Center (ROC), and a ransomware recovery warranty. Halcyon exposes a REST API for device/asset
  data and a universal API that streams alerts into SIEM, SOAR, and XDR platforms such as Splunk, Microsoft Sentinel, Google
  SecOps, Sumo Logic, and Exabeam, alongside backup integrations with Veeam, Cohesity, Acronis, and Commvault. Backed by Bain
  Capital Ventures and Obvious Ventures.
url: https://raw.githubusercontent.com/api-evangelist/halcyon/refs/heads/main/apis.yml
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
image: https://cdn.prod.website-files.com/6568a1bce0ae49e6bedec385/68d553829246f2a4e5ced212_Halcyon_OpenGraph_Homepage.jpg
x-type: company
x-source: vc-portfolio
x-backed-by:
- bain-capital-ventures
- obvious-ventures
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-19'
tags:
- Company
- Ai Infrastructure
- Cybersecurity
- Ransomware
- Endpoint Security
- Threat Detection
- SIEM
tags_raw:
- Company
- Ai Infrastructure
- Cybersecurity
- Ransomware
- Endpoint Security
- Threat Detection
- SIEM
- API
apis:
- name: Halcyon API
  description: Halcyon's REST API for device/asset data plus a universal API for streaming ransomware alerts into SIEM, SOAR,
    and XDR platforms. The API and its documentation are customer-authenticated (access-gated); no public OpenAPI is published.
  humanURL: https://www.halcyon.ai/platform/deployments-integrations
  baseURL: https://api.halcyon.ai
  properties:
  - type: Documentation
    url: https://docs.halcyon.ai/
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://www.halcyon.ai/
- type: Documentation
  url: https://docs.halcyon.ai/
- type: Blog
  url: https://www.halcyon.ai/blog
- type: Support
  url: https://supportal.halcyon.ai/
- type: SignUp
  url: https://www.halcyon.ai/get-a-demo
- type: PrivacyPolicy
  url: https://www.halcyon.ai/policies/privacy-policy
- type: TermsOfService
  url: https://www.halcyon.ai/policies/terms-of-service
- type: GitHubOrganization
  url: https://github.com/halcyon-ai
- type: TrustCenter
  url: security/halcyon-trust-center.yml
- type: Compliance
  url: https://trust.halcyon.ai/
- type: DomainSecurity
  url: security/halcyon-domain-security.yml
- type: LLMsTxt
  url: llms/halcyon-llms.txt
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

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