Arclan

Arclan provides a continuously validated registry of MCP servers, OpenAPI tools, and AI plugins, offering discovery, validation, and reliability metrics for agents. The platform indexes tools from GitHub, npm, PyPI, and well‑known MCP endpoints, delivering up‑to‑date information and security checks.

Arclan publishes 3 API contracts indexed on the APIs.io network: Registry API, Stats API, and Submit API. Tagged areas include Company, Registry, MCP, OpenAPI, and Artificial Intelligence.

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

Arclan’s developer surface includes documentation, API reference, and 13 more developer resources.

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26.1/100 emerging ▬ flat Agent 23/100 agent aware Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessOpen

1 published contract 3 Agent Skills

Company Registry MCP OpenAPI Artificial Intelligence Validation

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 26.1/100 · emerging

Contract Quality 11.3 / 21

Developer Ergonomics 2.5 / 17

Access Clarity 0.0 / 17

Operational Transparency 0.0 / 11

Contract Governance 2.2 / 10

Discoverability 5.6 / 9

Regulatory Posture 2.9 / 15

Agent readiness — 23/100 · 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 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 0 / 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 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

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):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey)
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document

8 more unmet checks in the Agent Readiness table above.

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

Access Clarity scores 0.0 — up to +20.0 composite points
Developer Ergonomics scores 14.8 — up to +17.0 composite points
Operational Transparency scores 0.0 — up to +13.0 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/arclan-ai/apis.yml: open an issue on github.com/api-evangelist/arclan-ai 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 →

Standards implemented 2

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

Model Context Protocol (MCP)

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

OpenAPI

measured — observed by APIs.io (published)

APIs 3

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

Arclan Registry API

The Registry API from Arclan — 3 operation(s) for registry.

Arclan Stats API

The Stats API from Arclan — 1 operation(s) for stats.

Arclan Submit API

The Submit API from Arclan — 1 operation(s) for submit.

Agent Skills 3

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

get-server

AGENT SKILL

list-servers

AGENT SKILL

submit-server

AGENT SKILL

Semantic Vocabularies 1

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

Arclan Ai Context

1 classes · 14 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Arclan API Rules

38 rules · 36 errors 1 warnings 1 info

SPECTRAL

JSON Schema 3

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

RegistryListResponse

0 properties

JSON SCHEMA

ServerDetail

0 properties

JSON SCHEMA

StatsResponse

0 properties

JSON SCHEMA

Security Posture 2

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

Arclan Ai Authentication

0 schemes

SECURITY

Arclan Ai Domain Security

TLSv1.3 · HSTS

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Arclan Ai Scopes

OAuth 2.0 · no documented scopes

0 scopes

SCOPES

Agentic Access 1

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

Arclan Ai Agentic Access

5 operations · 1 acting

AGENTIC

Resources

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgentSkill

LLMsTxt

WellKnown

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

ErrorCatalog

Conformance

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Company 1

The organization behind the API

Website

Website

Other 1

Properties that don't map to a standard resource type

Hosts

Hosts

Source (apis.yml)

aid: arclan-ai
name: Arclan
description: Arclan provides a continuously validated registry of MCP servers, OpenAPI tools, and AI plugins, offering discovery,
  validation, and reliability metrics for agents. The platform indexes tools from GitHub, npm, PyPI, and well‑known MCP endpoints,
  delivering up‑to‑date information and security checks.
accessModel:
  pricing: unknown
  onboarding: open
  trial: false
  try_now: false
  public: true
  gated: none
  gated_source:
  - onboarding
  label: Open access
  confidence: low
  source:
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
image: https://arclan.ai/favicon.svg
url: https://artifacts.apis.io/arclan-ai/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-01 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-11-01'
modified: '2026-11-01'
tags:
- Company
- Registry
- MCP
- OpenAPI
- Artificial Intelligence
- Validation
tags_raw:
- Company
- Registry
- MCP
- OpenAPI
- AI
- Validation
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/arclan-ai-agentic-access.yml
- type: Spectral
  url: rules/arclan-ai-rules.yml
- type: JSONLD
  url: json-ld/arclan-ai-context.jsonld
- type: Vocabulary
  url: vocabulary/arclan-ai-vocabulary.yml
- type: AgentSkill
  url: skills/_index.yml
- type: DataModel
  url: data-model/arclan-ai-data-model.yml
- type: ErrorCatalog
  url: errors/arclan-ai-problem-types.yml
- type: Conformance
  url: conformance/arclan-ai-conformance.yml
- type: LLMsTxt
  url: llms/arclan-ai-llms.txt
- type: WellKnown
  url: well-known/arclan-ai-well-known.yml
- type: Hosts
  url: hosts/arclan-ai-hosts.yml
- type: Documentation
  url: https://arclan.ai/api/docs
- type: DomainSecurity
  url: security/arclan-ai-domain-security.yml
- type: Website
  url: https://arclan.ai/
- type: APIReference
  url: https://arclan.ai/api/registry
apis:
- aid: arclan-ai:arclan-ai-registry-api
  name: Arclan Registry API
  description: The Registry API from Arclan — 3 operation(s) for registry.
  humanURL: https://arclan.ai/api/docs
  baseURL: https://arclan.ai
  tags:
  - Registry
  properties:
  - type: OpenAPI
    url: openapi/arclan-ai-registry-api-openapi.yml
  - type: JSONSchema
    url: json-schema/arclan-ai-registry-list-response-schema.json
  - type: JSONSchema
    url: json-schema/arclan-ai-server-detail-schema.json
  - type: JSONSchema
    url: json-schema/arclan-ai-stats-response-schema.json
- aid: arclan-ai:arclan-ai-stats-api
  name: Arclan Stats API
  description: The Stats API from Arclan — 1 operation(s) for stats.
  humanURL: https://arclan.ai/api/docs
  baseURL: https://arclan.ai
  tags:
  - Stats
  properties:
  - type: OpenAPI
    url: openapi/arclan-ai-stats-api-openapi.yml
  - type: JSONSchema
    url: json-schema/arclan-ai-registry-list-response-schema.json
  - type: JSONSchema
    url: json-schema/arclan-ai-server-detail-schema.json
  - type: JSONSchema
    url: json-schema/arclan-ai-stats-response-schema.json
- aid: arclan-ai:arclan-ai-submit-api
  name: Arclan Submit API
  description: The Submit API from Arclan — 1 operation(s) for submit.
  humanURL: https://arclan.ai/api/docs
  baseURL: https://arclan.ai
  tags:
  - Submit
  properties:
  - type: OpenAPI
    url: openapi/arclan-ai-submit-api-openapi.yml
  - type: JSONSchema
    url: json-schema/arclan-ai-registry-list-response-schema.json
  - type: JSONSchema
    url: json-schema/arclan-ai-server-detail-schema.json
  - type: JSONSchema
    url: json-schema/arclan-ai-stats-response-schema.json
x-enrichment:
  date: '2026-11-01'
  status: enriched
  artifacts_added: 32
  pass: modular-v1
  engine: identity=oss,contract=oss,surfaces=oss,docs=oss,regulatory=oss

Arclan API — frequently asked questions

Does Arclan have an API?

Yes. APIs.io lists 3 APIs from Arclan, including Arclan Registry API, Arclan Stats API and Arclan Submit API.

Is there an OpenAPI specification for the Arclan API?

Yes. APIs.io indexes 3 OpenAPI specifications for Arclan, each linked for download from this page.

How do I authenticate with the Arclan API?

Arclan documents its authentication (0 schemes). The details are profiled on APIs.io as Arclan Ai Authentication.

Is the Arclan API ready for AI agents?

Arclan has a Kin Score of 26.1 out of 100 (emerging) and an Agent Readiness score of 22.9 (agent-aware), scored by API Evangelist on 2026-11-06.

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

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