Arne Kellmann

Arne Kellmann is an AI solution architect who designs and ships production AI systems, covering architecture, retrieval, evaluation, guardrails, and cost control. He works remotely with teams worldwide in English or German, bringing over 15 years of software development and architecture experience. His services include written architecture assessments, production‑ready AI feature implementation, and ongoing guidance to ensure safe and cost‑effective AI deployments.

Arne Kellmann publishes 3 API contracts indexed on the APIs.io network: Documents API, Sandbox API, and Versioning.md API. Tagged areas include Artificial Intelligence, Architecture, Consultant, Remote, and Software.

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

Arne Kellmann’s developer surface includes CLI, sandbox, API reference, engineering blog, pricing, and 28 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

47.4/100 developing Agent 38/100 agent ready Full breakdown ↓
scored 2026-11-02 · rubric v0.26.0 · Show this score on your site →

AccessOpen

1 published contract 1 MCP Servers 1 Agent Skills

Artificial Intelligence ArchitectureConsultantRemote Software

Kin Score

Kin Score How this is scored →
scored 2026-11-02 · rubric v0.26.0

Composite quality — 47.4/100 · developing

Contract Quality 10.1 / 21

Developer Ergonomics 8.0 / 17

Access Clarity 8.9 / 17

Operational Transparency 4.1 / 11

Contract Governance 2.2 / 10

Discoverability 5.5 / 9

Regulatory Posture 4.0 / 15

Agent readiness — 38/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 0 / 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 4 / 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):

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)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented)
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

4 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 47.5 — up to +13.1 composite points
Developer Ergonomics scores 46.9 — up to +10.6 composite points
Access Clarity scores 52.6 — up to +9.5 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/arnekellmann-de/apis.yml: open an issue on github.com/api-evangelist/arnekellmann-de 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)

measured — observed by APIs.io (documented)

OpenAPI

measured — observed by APIs.io (published)

APIs 3

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

Arne Kellmann Documents API

The Documents API from Arne Kellmann — 1 operation(s) for documents.

Arne Kellmann Sandbox API

The Sandbox API from Arne Kellmann — 1 operation(s) for sandbox.

Arne Kellmann Versioning.md API

The Versioning.md API from Arne Kellmann — 1 operation(s) for versioning.md.

MCP Servers 1

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

Arne Kellmann MCP Server

Remote MCP server at arnekellmann.de.

MCP SERVER

Agent Skills 1

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

assess-architecture-fit

AGENT SKILL

Pricing Plans 1

Published pricing tiers and plan structures.

Arnekellmann De Plans Pricing

1 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Arnekellmann De Rate Limits

1 limits

RATE LIMITS

Semantic Vocabularies 1

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

Arnekellmann De Context

1 classes · 5 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Arne Kellmann API Rules

35 rules · 33 errors 1 warnings 1 info

SPECTRAL

Security Posture 2

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

Arnekellmann De Authentication

0 schemes

SECURITY

Arnekellmann De Domain Security

TLSv1.3 · HSTS

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Arnekellmann De Scopes

OAuth 2.0 · no documented scopes

0 scopes

SCOPES

Agentic Access 1

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

Arnekellmann De Agentic Access

3 operations · 1 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

Sandbox

Sandbox

DeveloperPortal

DeveloperPortal

Documentation 1

Reference material describing how the API behaves

APIReference

APIReference

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgentSkill

LLMsTxt

MCPServer

WellKnown

Design & Contract 9

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

Idempotency

Conventions

Lifecycle

ErrorCatalog

Conformance

Scroll for all 9

Build 5

SDKs, sample code, and the tooling you integrate with

CLI

ToolCrosswalk

SDKs

Packages

GitHubOrganization

GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

SecurityTxt

SecurityTxt

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

RateLimits

RateLimits

Commercial 4

Pricing, plans, and the legal terms of use

Plans

Pricing

TermsOfService

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: arnekellmann-de
name: Arne Kellmann
description: Arne Kellmann is an AI solution architect who designs and ships production AI systems, covering architecture,
  retrieval, evaluation, guardrails, and cost control. He works remotely with teams worldwide in English or German, bringing
  over 15 years of software development and architecture experience. His services include written architecture assessments,
  production‑ready AI feature implementation, and ongoing guidance to ensure safe and cost‑effective AI deployments.
url: https://artifacts.apis.io/arnekellmann-de/apis.yml
accessModel:
  pricing: unknown
  onboarding: open
  trial: false
  try_now: false
  public: true
  gated: none
  gated_source:
  - onboarding
  label: Open access
  confidence: high
  source:
  - plans
  - authentication
  - rate-limits
  - security
  - sandbox
  generated: '2026-11-02'
  method: derived
image: https://arnekellmann.de/og-image.png
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: '2026-11-02'
tags:
- Artificial Intelligence
- Architecture
- Consultant
- Remote
- Software
tags_raw:
- AI
- Architecture
- Consultant
- Remote
- Software
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/arnekellmann-de-agentic-access.yml
- type: RateLimits
  url: rate-limits/arnekellmann-de-rate-limits.yml
- type: Plans
  url: plans/arnekellmann-de-plans-pricing.yml
- type: Spectral
  url: rules/arnekellmann-de-rules.yml
- type: JSONLD
  url: json-ld/arnekellmann-de-context.jsonld
- type: Vocabulary
  url: vocabulary/arnekellmann-de-vocabulary.yml
- type: AgentSkill
  url: skills/_index.yml
- type: DataModel
  url: data-model/arnekellmann-de-data-model.yml
- type: CLI
  url: cli/arnekellmann-de-cli.yml
- type: Idempotency
  url: conventions/arnekellmann-de-conventions.yml
- type: Conventions
  url: conventions/arnekellmann-de-conventions.yml
- type: Lifecycle
  url: lifecycle/arnekellmann-de-lifecycle.yml
- type: ErrorCatalog
  url: errors/arnekellmann-de-problem-types.yml
- type: Conformance
  url: conformance/arnekellmann-de-conformance.yml
- type: LLMsTxt
  url: llms/arnekellmann-de-llms.txt
- type: ToolCrosswalk
  url: mcp/arnekellmann-de-tool-crosswalk.yml
- type: MCPServer
  url: mcp/arnekellmann-de-mcp.yml
- type: SecurityTxt
  url: well-known/arnekellmann-de-chatgpt-security.txt
- type: WellKnown
  url: well-known/arnekellmann-de-well-known.yml
- type: Hosts
  url: hosts/arnekellmann-de-hosts.yml
- type: Vendors
  url: vendors/arnekellmann-de-vendors.yml
- type: SDKs
  url: packages/arnekellmann-de-packages.yml
- type: Packages
  url: packages/arnekellmann-de-packages.yml
- type: Sandbox
  url: https://arnekellmann.de/sandbox
- type: GitHubOrganization
  url: https://github.com/ArneFfm
- type: DomainSecurity
  url: security/arnekellmann-de-domain-security.yml
- type: Website
  url: https://arnekellmann.de/
- type: DeveloperPortal
  url: https://arnekellmann.de/developers
- type: APIReference
  url: https://arnekellmann.de/api
- type: Blog
  url: https://arnekellmann.de/blog
- type: Pricing
  url: https://arnekellmann.de/pricing
- type: TermsOfService
  url: https://arnekellmann.de/terms
- type: PrivacyPolicy
  url: https://arnekellmann.de/privacy
apis:
- aid: arnekellmann-de:arnekellmann-de-documents-api
  name: Arne Kellmann Documents API
  description: The Documents API from Arne Kellmann — 1 operation(s) for documents.
  humanURL: https://arnekellmann.de/api
  baseURL: https://arnekellmann.de
  tags:
  - Documents
  properties:
  - type: OpenAPI
    url: openapi/arnekellmann-de-documents-api-openapi.yml
- aid: arnekellmann-de:arnekellmann-de-sandbox-api
  name: Arne Kellmann Sandbox API
  description: The Sandbox API from Arne Kellmann — 1 operation(s) for sandbox.
  humanURL: https://arnekellmann.de/api
  baseURL: https://arnekellmann.de
  tags:
  - Sandbox
  properties:
  - type: OpenAPI
    url: openapi/arnekellmann-de-sandbox-api-openapi.yml
- aid: arnekellmann-de:arnekellmann-de-versioning-md-api
  name: Arne Kellmann Versioning.md API
  description: The Versioning.md API from Arne Kellmann — 1 operation(s) for versioning.md.
  humanURL: https://arnekellmann.de/api
  baseURL: https://arnekellmann.de
  tags:
  - Versioning.md
  properties:
  - type: OpenAPI
    url: openapi/arnekellmann-de-versioning-md-api-openapi.yml
x-enrichment:
  date: '2026-11-01'
  status: enriched
  artifacts_added: 38
  pass: modular-v1
  engine: identity=oss,contract=oss,surfaces=oss,docs=oss,regulatory=oss

Arne Kellmann API — frequently asked questions

Does Arne Kellmann have an API?

Yes. APIs.io lists 3 APIs from Arne Kellmann, including Arne Kellmann Documents API, Arne Kellmann Sandbox API and Arne Kellmann Versioning.md API.

Is there an OpenAPI specification for the Arne Kellmann API?

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

How do I authenticate with the Arne Kellmann API?

Arne Kellmann documents its authentication (0 schemes). The details are profiled on APIs.io as Arnekellmann De Authentication.

How much does the Arne Kellmann API cost?

APIs.io lists 1 pricing plan for Arne Kellmann, with each plan's price, limits and inclusions under Pricing Plans on this page.

Does Arne Kellmann have an MCP server?

Yes. APIs.io lists 1 MCP server for Arne Kellmann: Remote MCP server at arnekellmann.de.

Is the Arne Kellmann API ready for AI agents?

Arne Kellmann has a Kin Score of 47.4 out of 100 (developing) and an Agent Readiness score of 38.3 (agent-ready), scored by API Evangelist on 2026-11-02.

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