Patronus Protect

Patronus Protect, from Casdo Labs GmbH, is an on-device AI firewall that detects prompt injection, PII/DLP, sensitive documents and agentic tool risk in text, public HTTPS webpages, documents and MCP servers before they are used by AI agents, RAG pipelines or LLM applications. It exposes a REST Scan API (control.patronus.studio/api/v1), first-party Rust, TypeScript and Python SDK clients, a local CLI with Codex, Claude Code and DeepSeek plugins, a remote OAuth-protected MCP server and a local stdio MCP server, and the open-source Patronus Ark scanning core.

Patronus Protect publishes 1 API contract indexed on the APIs.io network: Scan API. Tagged areas include AI Safety, Prompt Injection, Security, LLM, and Agent-Native.

Patronus Protect’s developer surface includes getting-started guide, pricing, engineering blog, CLI, changelog, and 19 more developer resources.

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53.1/100 developing ▬ flat Agent 62/100 agent native Front door AI 6/6 dominant Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

1 published contract 1 MCP Servers 1 Agent Skills

AI Safety Prompt Injection Security LLM Agent-Native MCP DLP PII On-Device AI Firewall

What this lets a business do 1

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

Cybersecurity Management

BC-620

Scan

Kin Score

Kin Score How this is scored →
scored 2026-10-31 · rubric v0.25.0

Composite quality — 53.1/100 · developing

Contract Quality 11.1 / 21

Developer Ergonomics 12.5 / 17

Access Clarity 8.5 / 17

Operational Transparency 3.5 / 11

Contract Governance 1.9 / 10

Discoverability 5.8 / 9

Regulatory Posture 4.5 / 15

Agent readiness — 62/100 · agent native

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 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 6 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

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):

Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks
Documented Reversibility +6 pts — a reversal operation in the contract, graded up when a window is documented too
Agentic Commerce Well-Known Document +5 pts — a parsing /.well-known/ucp.json or acp.json declaring a version and at least one service — `self` when its endpoints are on the provider's own domain, `platform` when they are on a vendor's
Dry-Run / Simulate Mode +4 pts — OpenAPI: destructive operations expose a dry_run / simulate / preview / validate_only parameter

2 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 52.0 — up to +12.0 composite points
Access Clarity scores 50.0 — up to +10.0 composite points
Contract Governance scores 18.2 — up to +9.8 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/patronus-protect/apis.yml: open an issue on github.com/api-evangelist/patronus-protect 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 →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Agent Skills (SKILL.md packages)	undeclared	-	1	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

APIs 1

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

Patronus Protect Scan API

The Scan API from Patronus Protect — 2 operation(s) for scan.

MCP Servers 1

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

Patronus Protect MCP Server

Patronus ships an MCP server in two deployments. A remote, OAuth-protected MCP server is served at control.patronus.studio/api/mcp (DCR + PKCE, scopes scan:read/scan:write). A l...

MCP SERVER

Agent Skills 1

Packaged agent skills for driving this provider's APIs from an AI assistant.

patronus-security-scan

AGENT SKILL

Pricing Plans 2

Published pricing tiers and plan structures.

Patronus Protect Plans Pricing

6 plans

PLANS

Patronus Protect Price Estimates

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Patronus Protect Rate Limits

0 limits

RATE LIMITS

FinOps 1

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

Patronus Protect Finops

FINOPS

OpenAPI Overlays 1

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

Patronus Protect Openapi Overlay

3 actions · documentation · patronus-protect-openapi.json

GENERATED

JSON Schema 1

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

Patronus local runtime v1 NDJSON frame

0 properties

JSON SCHEMA

Security Posture 3

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

Patronus Protect Authentication

http/oauth2 · 2 schemes

SECURITY

Patronus Protect Domain Security

TLSv1.3 · DMARC

SECURITY

Patronus Protect Vulnerability Disclosure

security.txt · contact published

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Patronus Protect Scopes

2 scopes

SCOPES

Resources

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

Documentation 1

Reference material describing how the API behaves

JSONSchema

JSONSchema

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

MCPServer

AgentSkill

LLMsTxt

WellKnown

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

Conformance

Conformance

Build 4

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

Packages

SDKs

CLI

Access & Security 4

Authentication, authorization, and security posture

SecurityTxt

SecurityTxt

VulnerabilityDisclosure

VulnerabilityDisclosure

Security

Security

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

RateLimits

RateLimits

ChangeLog

ChangeLog

Commercial 2

Pricing, plans, and the legal terms of use

Pricing

Pricing

Plans

Plans

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 2

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Overlay

Overlay

Source (apis.yml)

name: Patronus Protect
aid: patronus-protect
description: Patronus Protect, from Casdo Labs GmbH, is an on-device AI firewall that detects prompt injection, PII/DLP, sensitive
  documents and agentic tool risk in text, public HTTPS webpages, documents and MCP servers before they are used by AI agents,
  RAG pipelines or LLM applications. It exposes a REST Scan API (control.patronus.studio/api/v1), first-party Rust, TypeScript
  and Python SDK clients, a local CLI with Codex, Claude Code and DeepSeek plugins, a remote OAuth-protected MCP server and
  a local stdio MCP server, and the open-source Patronus Ark scanning core.
url: https://patronus.studio/
created: '2026-09-20'
modified: '2026-09-20'
tags:
- AI Safety
- Prompt Injection
- Security
- LLM
- Agent-Native
- MCP
- DLP
- PII
- On-Device
- AI Firewall
tags_raw:
- AI Safety
- Prompt Injection
- Security
- LLM
- agent-native
- MCP
- DLP
- PII
- On-Device
- AI Firewall
apis:
- aid: patronus-protect:patronus-protect-scan-api
  name: Patronus Protect Scan API
  description: The Scan API from Patronus Protect — 2 operation(s) for scan.
  humanURL: https://docs.patronus.studio/api-reference/
  baseURL: https://control.patronus.studio/api/v1
  tags:
  - Scans
  tags_raw:
  - Scan
  properties:
  - type: OpenAPI
    url: openapi/patronus-protect-scan-api-openapi.yml
  - type: Documentation
    url: https://docs.patronus.studio/api-reference/
  - type: APIReference
    url: https://docs.patronus.studio/api-reference/
  - type: ToolCrosswalk
    url: mcp/patronus-protect-tool-crosswalk.yml
  - type: Authentication
    url: authentication/patronus-protect-authentication.yml
  - type: OAuthScopes
    url: scopes/patronus-protect-scopes.yml
  - type: RateLimits
    url: rate-limits/patronus-protect-rate-limits.yml
  - type: ErrorCatalog
    url: errors/patronus-protect-problem-types.yml
  - type: DataModel
    url: data-model/patronus-protect-data-model.yml
  - type: Conventions
    url: conventions/patronus-protect-conventions.yml
common:
- type: RateLimits
  url: rate-limits/patronus-protect-rate-limits.yml
- type: CapabilityMap
  url: capabilities/patronus-protect-capability-edges.yml
  name: Patronus Protect Business Capability Map
- type: Overlay
  url: overlays/patronus-protect-openapi-overlay.yaml
- type: MCPServer
  url: mcp/patronus-protect-mcp.yml
- type: Website
  url: https://patronus.studio/
- type: DeveloperPortal
  url: https://docs.patronus.studio/
- type: GettingStarted
  url: https://patronus-protect.github.io/patronus-security/getting-started/quickstart/
- type: Pricing
  url: https://patronus.studio/pricing
- type: Blog
  url: https://patronus.studio/blog
- type: GitHubOrganization
  url: https://github.com/patronus-protect
- type: Packages
  url: packages/patronus-protect-packages.yml
- type: SDKs
  url: packages/patronus-protect-packages.yml
- type: CLI
  url: cli/patronus-protect-cli.yml
- type: AgentSkill
  url: skills/_index.yml
- type: LLMsTxt
  url: llms/patronus-protect-llms.txt
- type: JSONSchema
  url: json-schema/patronus-protect-runtime-v1.schema.json
- type: Conformance
  url: conformance/patronus-protect-conformance.yml
- type: Plans
  url: plans/patronus-protect-plans-pricing.yml
- type: ChangeLog
  url: changelog/patronus-protect-changelog.yml
- type: WellKnown
  url: well-known/patronus-protect-well-known.yml
- type: SecurityTxt
  url: well-known/patronus-protect-security.txt
- type: VulnerabilityDisclosure
  url: security/patronus-protect-vulnerability-disclosure.yml
- type: Security
  url: security/patronus-protect-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/patronus-protect-domain-security.yml
maintainers:
- FN: Casdo Labs GmbH
  email: team@patronus.studio
  url: https://patronus.studio
x-enrichment:
  date: '2026-09-20'
  status: enriched
  artifacts_added: 26
  pass: local-v3

Patronus Protect API — frequently asked questions

Does Patronus Protect have an API?

Yes. APIs.io lists 1 API from Patronus Protect, including Patronus Protect Scan API.

Is there an OpenAPI specification for the Patronus Protect API?

Yes. APIs.io indexes 1 OpenAPI specification for Patronus Protect, each linked for download from this page.

How do I authenticate with the Patronus Protect API?

Patronus Protect documents its authentication (http/oauth2 · 2 schemes). The details are profiled on APIs.io as Patronus Protect Authentication.

How much does the Patronus Protect API cost?

APIs.io lists 6 pricing plans for Patronus Protect, with each plan's price, limits and inclusions under Pricing Plans on this page.

Does Patronus Protect have an MCP server?

Yes. APIs.io lists 1 MCP server for Patronus Protect: Patronus ships an MCP server in two deployments. A remote, OAuth-protected MCP server is served at control.patronus.studio/api/mcp (DCR + PKCE, scopes scan:read/scan:write). A local stdio MCP server (

Is the Patronus Protect API ready for AI agents?

Patronus Protect has a Kin Score of 53.1 out of 100 (developing) and an Agent Readiness score of 61.8 (agent-native), scored by API Evangelist on 2026-10-31.

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