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Where the information came from. Everything here is assembled from material a member of the public can reach with a browser and no credentials — the company's own website, developer portal and documentation, the specifications it publishes for public use (OpenAPI, AsyncAPI, JSON Schema,
apis.json,llms.txtand similar), its public repositories, and its public status, pricing and changelog pages. Nothing here is obtained by breaching a system, defeating an access control, or using credentials of any kind.The rating is an independent assessment. The Kin Score and Agent Readiness rating are independently calculated scores of a company's public API artifacts, produced by API Evangelist against a published rubric. They are not certifications, endorsements, security assessments, or audits, and they score published artifacts — not the quality, safety, or security of the software.
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Full detail: Where this data comes from
Collection of Microsoft Defender security APIs for threat protection, endpoint security, and security operations.
Areas: Cloud Security · Data Protection · Threat Intelligence · Email Security · Endpoint Security
Everything profiled for Microsoft Defender is published on APIs.io rather than in this repository. Start at the provider page — apis.io/providers/microsoft-defender/ — or go straight to one of the APIs or properties below.
- Microsoft Defender for Cloud Apps API — Cloud Access Security Broker (CASB) API for discovering, investigating, and governing cloud apps.
- Microsoft Defender Threat Intelligence API — Access threat intelligence data, indicators of compromise (IOCs), and threat analytics.
- Microsoft Defender for Office 365 API — API for email and collaboration protection including anti-phishing, anti-malware, and safe attachments.
- Microsoft Defender XDR API — Unified extended detection and response API for automating workflows based on shared incident and advanced hunting tables across Microsoft security products.
- Microsoft Defender for Cloud REST API — REST API for unified security management and advanced threat protection across hybrid cloud workloads in Azure, other clouds, and on-premises.
- Microsoft Defender for Identity API — API for identity-based attack detection and investigation across on-premises Active Directory and hybrid environments, with sensor management via Microsoft…
- Microsoft Defender Alerts API — Manage security alerts generated by Microsoft Defender for Endpoint. Alerts represent detected threats, suspicious activities, and security events on endpoints.
- Microsoft Defender Machines API — Manage devices (machines) that have communicated with Microsoft Defender for Endpoint. Retrieve device information, health status, risk scores, and exposure…
- Microsoft Defender Vulnerabilities API — Retrieve vulnerability information from Microsoft Defender Vulnerability Management. Access CVE data, severity scores, exploit information, and exposure…
Each property below is a page on APIs.io carrying the machine-readable artifact and what it says.
Which operations an agent can call, which act, and which need a human in the loop.
The data models the API reads and writes.
- Microsoft Defender for Endpoint Alert
- AlertComment
- AlertEvidence
- AlertUpdate
- IpAddress
- Machine
- MachineReference
- RelatedUser
- Vulnerability
Data models expressed in JSON Structure.
Linked-data contexts for the provider's vocabulary.
The provider's domain terms, defined.
Postman and Open Collection request collections.
- Microsoft Defender for Endpoint Alerts API
- Microsoft Defender for Endpoint API
- Microsoft Defender for Endpoint Alerts Machines API
- Microsoft Defender for Endpoint Alerts Vulnerabilities API
Spectral rulesets for the provider's contracts.
Authentication, trust centre, and vulnerability disclosure.
- Microsoft Defender Authentication
- Microsoft Defender Domain Security
- Microsoft Defender Vulnerability Disclosure
The permissions the API asks for.
Published plans, tiers and prices.
Published request limits.
What the API costs to run, by operation.
Links to the company's own pages. This repository publishes no copy of their specifications — the canonical document is theirs and lives at the URLs below.
Kin Score 48.8 — developing · rubric 0.25.0 · scored 2026-10-23
| Facet | Score |
|---|---|
| Discoverability | 44.6 |
| Contract quality | 55.7 |
| Contract governance | 9.8 |
| Operational transparency | 52.6 |
| Developer ergonomics | 57.1 |
| Access clarity | 39.5 |
Agent readiness 22.0 — agent-aware
| Agent-readiness dimension | Result |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived (partial credit) |
| Reversibility Documented | — |
| MCP Server | — |
| Auth Clarity | bearer (partial credit) |
| Idempotency | — |
| Error Semantics | documented (partial credit) |
| OpenAPI Examples | documented (partial credit) |
| Rate Limit Signal | derived (partial credit) |
| Event Surface Described | — |
| Agent Skills | — |
| Well Known Catalog | — |
| Consent Identity | — |
| Agent Card | — |
| Dry Run Mode | — |
| Delegated Identity | — |
| Protected Resource Metadata | — |
| Dynamic Client Registration | — |
| Agentic Commerce | — |
| Pagination Ratio | na |
| Operation Distinctiveness | na |
Regulatory alignment 40.2 — Horizontal (data, software, accessibility, platform)
The rubric is published at github.com/api-evangelist/kin-score. The per-check breakdown behind these numbers — which checks were earned, partial or missed — along with score history and how this provider compares to its peers, is available at apis.io/providers/microsoft-defender/.
API Evangelist profiles a company's public API surface the way a developer would find it: the website, developer portal and documentation, the specifications it publishes, its public repositories, and its pricing, status and changelog pages. From that it derives the properties above — contracts split per API, workflows, schemas, collections, governance rules, plans and rate limits — and scores them against the published Kin Score rubric.
The artifacts are published on APIs.io, not in this repository. This repository is the public record for Microsoft Defender: the place to say something is wrong, missing or out of date, and to ask for a re-score or a removal.
- Something about this listing — a wrong description, a missing API, a stale artifact or a question about the rating: open an issue on this repository.
- A new API, or one that is not in the catalog yet — submit it on APIs.io.
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