Arthur AI

Arthur is an enterprise AI governance and observability platform for discovering, monitoring, evaluating, and governing AI and ML systems in production. The Arthur Platform API (internally "Arthur Scope", OpenAPI 3.1) exposes 213 operations across models, tasks, datasets, connectors, metrics, alerts, alert rules, policies, workspaces, projects, agents, and webhooks, secured with OAuth2 via Keycloak. Arthur also ships the open-source Arthur Engine (LLM guardrails plus ML evaluation), the arthur-bench LLM evaluation library, Python client SDKs, and an Agent Toolkit with a Claude Code integration for end-to-end tracing.

Arthur AI publishes 1 API on the APIs.io network: Arthur Platform API. Tagged areas include Company, AI, AI Governance, AI Observability, and Machine Learning.

The Arthur AI catalog on APIs.io includes 1 event-driven AsyncAPI specification.

Arthur AI’s developer surface includes documentation, getting-started guide, engineering blog, pricing, support, authentication, changelog, and 22 more developer resources.

🌐 Visit website 📡 Source on GitHub
44.9/100 thin Agent 61/100 agent native Full breakdown ↓
scored 2026-07-20 · rubric v0.4
1 APIs 1 MCP Servers 0 Features
CompanyAIAI GovernanceAI ObservabilityMachine LearningLLM EvaluationModel MonitoringMLOpsGuardrailsAgents

API Rating

API Evangelist API Evangelist Rating How this is scored →
scored 2026-07-20 · rubric v0.4
Composite quality — 44.9/100 · thin
Contract Quality 9.4 / 25
Developer Ergonomics 13.5 / 20
Commercial Clarity 8.9 / 20
Operational Transparency 3.8 / 13
Governance 0.0 / 12
Discoverability 9.3 / 10
Agent readiness — 61/100 · agent native
Machine-Readable Contract 18 / 18
Agentic Access Contract 0 / 15
MCP Server 12 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 8 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 0 / 7
Typed Event Surface 6 / 6
Agent Skills 5 / 5
Well-Known Catalog 4 / 4
Consent & Bot Identity 0 / 3
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/arthur-ai: 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

Arthur Platform API

The Arthur Platform REST API (Arthur Scope) for managing models, tasks, datasets, connectors, metrics, alerts, alert rules, policies, workspaces, projects, agents, and webhooks....

MCP Servers

arthur-ai-mcp.yml

MCP SERVER

Event Specifications

Arthur Ai Webhooks

ASYNCAPI

Resources

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal
DeveloperPortal
 GettingStarted
GettingStarted
 Login
Login

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

WellKnown
WellKnown
 MCPServer
MCPServer
 LLMsTxt
LLMsTxt
 AgentSkill
AgentSkill

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Conformance
Conformance
 ErrorCatalog
ErrorCatalog
 Lifecycle
Lifecycle
 Conventions
Conventions
 DataModel
DataModel
 Webhooks
Webhooks

Build 3

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization
 Packages
Packages
 SDKs
SDKs

Access & Security 3

Authentication, authorization, and security posture

Authentication
Authentication
 OAuthScopes
OAuthScopes
 DomainSecurity
DomainSecurity

Operate 3

Status, limits, changes, and where to get help

Support
Support
 ChangeLog
ChangeLog
 ChangeLog
ChangeLog

Commercial 3

Pricing, plans, and the legal terms of use

Pricing
Pricing
 TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy

Company 2

The organization behind the API

Website
Website
 Blog
Blog

Other 1

Properties that don't map to a standard resource type

Overlay
Overlay

Source (apis.yml)

apis.yml Raw ↑ 
aid: arthur-ai
name: Arthur AI
description: Arthur is an enterprise AI governance and observability platform for discovering, monitoring, evaluating, and
  governing AI and ML systems in production. The Arthur Platform API (internally "Arthur Scope", OpenAPI 3.1) exposes 213
  operations across models, tasks, datasets, connectors, metrics, alerts, alert rules, policies, workspaces, projects, agents,
  and webhooks, secured with OAuth2 via Keycloak. Arthur also ships the open-source Arthur Engine (LLM guardrails plus ML
  evaluation), the arthur-bench LLM evaluation library, Python client SDKs, and an Agent Toolkit with a Claude Code integration
  for end-to-end tracing.
image: https://platform.arthur.ai/favicon.png
url: https://raw.githubusercontent.com/api-evangelist/arthur-ai/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- homebrew
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-18'
tags:
- Company
- AI
- AI Governance
- AI Observability
- Machine Learning
- LLM Evaluation
- Model Monitoring
- MLOps
- Guardrails
- Agents
apis:
- name: Arthur Platform API
  description: The Arthur Platform REST API (Arthur Scope) for managing models, tasks, datasets, connectors, metrics, alerts,
    alert rules, policies, workspaces, projects, agents, and webhooks. OpenAPI 3.1, OAuth2 (Keycloak), URI-path versioned
    at /api/v1.
  humanURL: https://docs.arthur.ai
  baseURL: https://platform.arthur.ai/api
  tags:
  - AI Governance
  - Model Monitoring
  - Agents
  properties:
  - type: OpenAPI
    url: openapi/arthur-ai-platform-openapi.json
  - type: APIReference
    url: https://platform.arthur.ai/api/docs
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://www.arthur.ai
- type: Documentation
  url: https://docs.arthur.ai
- type: DeveloperPortal
  url: https://docs.arthur.ai
- type: GettingStarted
  url: https://docs.arthur.ai/docs/getting-started
- type: Blog
  url: https://www.arthur.ai/blog
- type: GitHubOrganization
  url: https://github.com/arthur-ai
- type: Pricing
  url: https://www.arthur.ai/pricing
- type: Login
  url: https://engine.platform.arthur.ai/welcome
- type: TermsOfService
  url: https://www.arthur.ai/terms
- type: PrivacyPolicy
  url: https://www.arthur.ai/privacy
- type: Support
  url: https://discord.gg/ZuJuZJucyG
- type: Authentication
  url: authentication/arthur-ai-authentication.yml
- type: OAuthScopes
  url: scopes/arthur-ai-scopes.yml
- type: DomainSecurity
  url: security/arthur-ai-domain-security.yml
- type: Packages
  url: packages/arthur-ai-packages.yml
- type: SDKs
  url: packages/arthur-ai-packages.yml
- type: WellKnown
  url: well-known/arthur-ai-well-known.yml
- type: MCPServer
  url: mcp/arthur-ai-mcp.yml
- type: LLMsTxt
  url: llms/arthur-ai-llms.txt
- type: Overlay
  url: overlays/arthur-ai-platform-overlay.yaml
- type: Conformance
  url: conformance/arthur-ai-conformance.yml
- type: ErrorCatalog
  url: errors/arthur-ai-problem-types.yml
- type: Lifecycle
  url: lifecycle/arthur-ai-lifecycle.yml
- type: Conventions
  url: conventions/arthur-ai-conventions.yml
- type: ChangeLog
  url: changelog/arthur-ai-changelog.yml
- type: ChangeLog
  url: https://docs.arthur.ai/changelog
- type: DataModel
  url: data-model/arthur-ai-data-model.yml
- type: Webhooks
  url: asyncapi/arthur-ai-webhooks.yml
- type: AgentSkill
  url: skills/_index.yml
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence