Falco website screenshot

Falco

Falco is a cloud-native runtime security tool that detects unexpected application behavior and alerts on threats at runtime using eBPF. It is a CNCF graduated project that continuously monitors Linux kernel syscalls and compares them against configurable security rules to detect intrusions, privilege escalation, and other suspicious behaviors.

Falco publishes 3 APIs on the APIs.io network: Health API, Rules API, and Version API. Tagged areas include Cloud-Native, eBPF, Runtime Security, Security, and Threat Detection.

The Falco catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

Falco’s developer surface includes documentation, engineering blog, getting-started guide, changelog, and 13 more developer resources.

🌐 Visit website 📡 Source on GitHub
38.9/100 thin ▬ flat Agent 22/100 agent aware self hosted · Apache-2.0 Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0
AccessFreemium
1 APIs
Cloud-NativeeBPFRuntime SecuritySecurityThreat Detection

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0
Composite quality — 38.9/100 · thin
Contract Quality 11.7 / 20
Developer Ergonomics 5.3 / 16
Access Clarity 2.5 / 16
Operational Transparency 3.6 / 10
Contract Governance 0.9 / 10
Discoverability 5.3 / 8
Open Source Surface 6.5 / 10
Create-or-Update Ergonomics 0.0 / 10
Agent readiness — 22/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 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 7 / 7
Rate-Limit Signaling 7 / 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
Open Source Surface applies to this provider. This product is open source and we read its repository directly, so Open Source Surface carries 10 points of the composite. It is scored from what the repository actually publishes — a security policy, a contribution guide, a release history, a code of conduct — read live from the provider rather than inferred from our own catalog pointers. This facet adds; nothing was taken away to make room for it. An open-source project is not excused from the commercial facets, because exemption would strip it of the points it does earn. If we have the wrong repository, or this product is not open source, say so on your provider repo and we will drop the facet rather than have you publish against it.
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.
The six quality facets above are damped to 80 points between them, because the conditional facet above carries the other 20. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 80% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.
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/falco: 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 5

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

Falco Plugin API

The Falco Plugin API provides a C ABI interface for developing plugins that extend Falco with new event sources and field extractors. Plugins are shared libraries that implement...

Falco gRPC API

The Falco gRPC API provided a streaming interface for consuming Falco alert outputs and querying version information from a running Falco instance. The embedded gRPC server and ...

Falco Health API

Health check endpoints

Falco Rules API

Rules management endpoints

Falco Version API

Version information

Open Collections 5

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

Falco HTTP Health API

OPEN COLLECTION

Falco HTTP Health Rules API

OPEN COLLECTION

Falco HTTP Health Version API

OPEN COLLECTION

Falco HTTP API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Falco Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Falco Rate Limits

5 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Falco Finops

FINOPS

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Falco Context

5 classes · 28 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Falco API Rules

6 rules · 4 warnings 2 info

SPECTRAL

JSON Schema 2

Standalone JSON Schema definitions for this provider's data models.

Falco Alert Output

9 properties

JSON SCHEMA

Falco Rules File

0 properties

JSON SCHEMA

Security Posture 1

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

Falco Domain Security

TLSv1.3 · HSTS

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Falco Agentic Access

4 operations · 1 acting

4 operations · 1 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

GettingStarted
GettingStarted

Documentation 2

Reference material describing how the API behaves

ContributionGuide
ContributionGuide
 Documentation
Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

JSONLD
JSONLD

Build 3

SDKs, sample code, and the tooling you integrate with

CodeOfConduct
CodeOfConduct
 GitHubOrganization
GitHubOrganization
 GitHubRepository
GitHubRepository

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Operate 4

Status, limits, changes, and where to get help

IssueTracker
IssueTracker
 Releases
Releases
 Community
Community
 ChangeLog
ChangeLog

Commercial 1

Pricing, plans, and the legal terms of use

License
License

Company 3

The organization behind the API

LinkedIn
LinkedIn
 Website
Website
 Blog
Blog

Source (apis.yml)

apis.yml Raw ↑ 
aid: falco
name: Falco
description: Falco is a cloud-native runtime security tool that detects unexpected application behavior and alerts on threats
  at runtime using eBPF. It is a CNCF graduated project that continuously monitors Linux kernel syscalls and compares them
  against configurable security rules to detect intrusions, privilege escalation, and other suspicious behaviors.
type: Index
deliveryModel:
  model: self-hosted
  license: Apache-2.0
  open_source: true
  commercial: false
  callable_host: false
  label: Self-hosted open source · you run it yourself
  confidence: high
  source:
  - license
  - openapi
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/falco.png
tags:
- Cloud-Native
- eBPF
- Runtime Security
- Security
- Threat Detection
tags_raw:
- Cloud Native
- eBPF
- Runtime Security
- Security
- Threat Detection
url: https://falco.org
created: '2025-01-01'
modified: '2026-05-19'
position: Consuming
access: 3rd-Party
specificationVersion: '0.23'
apis:
- aid: falco:falco-plugin-api
  name: Falco Plugin API
  description: The Falco Plugin API provides a C ABI interface for developing plugins that extend Falco with new event sources
    and field extractors. Plugins are shared libraries that implement the plugin API and can be loaded at runtime to add support
    for new data sources such as cloud audit logs, container activity, and custom event streams.
  humanURL: https://falco.org/docs/reference/plugins/plugin-api-reference/
  tags:
  - Developer Tools
  - Event Sources
  - Plugin
  properties:
  - type: Documentation
    url: https://falco.org/docs/developer-guide/
  - type: Reference
    url: https://falco.org/docs/reference/plugins/plugin-api-reference/
  - type: GitHubRepository
    url: https://github.com/falcosecurity/plugin-sdk-go
- aid: falco:falco-grpc-api
  name: Falco gRPC API
  description: The Falco gRPC API provided a streaming interface for consuming Falco alert outputs and querying version information
    from a running Falco instance. The embedded gRPC server and gRPC Output have been deprecated in Falco 0.43.0 and will
    be removed in a future release.
  humanURL: https://falco.org/docs/developer-guide/grpc/
  tags:
  - Deprecated
  - gRPC
  - Security
  properties:
  - type: Documentation
    url: https://falco.org/docs/developer-guide/grpc/
  - type: Deprecation Notice
    url: https://falco.org/blog/falco-0-43-0/
  - type: GitHubRepository
    url: https://github.com/falcosecurity/falco
- aid: falco:falco-health-api
  name: Falco Health API
  description: Health check endpoints
  humanURL: https://falco.org/docs/
  tags:
  - Health
  properties:
  - type: OpenAPI
    url: openapi/falco-health-api-openapi.yml
  - type: Documentation
    url: https://falco.org/docs/
  - type: Reference
    url: https://falco.org/docs/reference/
  - type: JSONSchema
    url: json-schema/falco-alert-output.json
  - type: JSONSchema
    url: json-schema/falco-rules.json
  - type: GitHubRepository
    url: https://github.com/falcosecurity/falco
- aid: falco:falco-rules-api
  name: Falco Rules API
  description: Rules management endpoints
  humanURL: https://falco.org/docs/
  tags:
  - Rules
  properties:
  - type: OpenAPI
    url: openapi/falco-rules-api-openapi.yml
  - type: Documentation
    url: https://falco.org/docs/
  - type: Reference
    url: https://falco.org/docs/reference/
  - type: JSONSchema
    url: json-schema/falco-alert-output.json
  - type: JSONSchema
    url: json-schema/falco-rules.json
  - type: GitHubRepository
    url: https://github.com/falcosecurity/falco
- aid: falco:falco-version-api
  name: Falco Version API
  description: Version information
  humanURL: https://falco.org/docs/
  tags:
  - Version
  properties:
  - type: OpenAPI
    url: openapi/falco-version-api-openapi.yml
  - type: Documentation
    url: https://falco.org/docs/
  - type: Reference
    url: https://falco.org/docs/reference/
  - type: JSONSchema
    url: json-schema/falco-alert-output.json
  - type: JSONSchema
    url: json-schema/falco-rules.json
  - type: GitHubRepository
    url: https://github.com/falcosecurity/falco
common:
- type: IssueTracker
  url: https://github.com/falcosecurity/plugin-sdk-go/issues
- type: Releases
  url: https://github.com/falcosecurity/plugin-sdk-go/releases
- type: CodeOfConduct
  url: https://github.com/falcosecurity/.github/blob/main/CODE_OF_CONDUCT.md
- type: ContributionGuide
  url: https://github.com/falcosecurity/.github/blob/main/CONTRIBUTING.md
- type: License
  name: Apache-2.0
  url: https://github.com/falcosecurity/plugin-sdk-go/blob/main/LICENSE
- type: AgenticAccess
  url: agentic-access/falco-agentic-access.yml
- type: DomainSecurity
  url: security/falco-domain-security.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/falco-security-oss
- type: Website
  url: https://falco.org
- type: Documentation
  url: https://falco.org/docs/
- type: Blog
  url: https://falco.org/blog/
- type: Community
  url: https://falco.org/community/
- type: GettingStarted
  url: https://falco.org/docs/getting-started/
- type: ChangeLog
  url: https://falco.org/docs/reference/changelog/
- type: GitHubOrganization
  url: https://github.com/falcosecurity
- type: GitHubRepository
  url: https://github.com/falcosecurity/falco
- type: JSONLD
  url: json-ld/falco-context.jsonld
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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