Fakturai

Fakturai provides a German B2B e-invoicing service that generates ZUGFeRD/Factur‑X compliant PDFs via a REST API and MCP server. It supports EN 16931, offers validation against the official KoSIT validator, and integrates with automation platforms like Claude, Cursor, n8n, Make, Zapier. The platform includes a SaaS control room, API‑Key management, pricing plans, and documentation in German and English.

Fakturai is listed with 1 API on the APIs.io network. Tagged areas include Invoicing, E-Invoicing, German, and Automation.

Fakturai’s developer surface includes authentication, documentation, API reference, getting-started guide, pricing, engineering blog, and 12 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

29.3/100 thin Agent 6/100 agent aware Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessFreemiumSelf serve⚡ Free to try

1 API

Invoicing E-Invoicing German Automation

Kin Score

Kin Score How this is scored →
scored 2026-11-13 · rubric v0.28.0

Composite quality — 29.3/100 · thin

Contract Quality 0.0 / 21

Developer Ergonomics 7.3 / 17

Access Clarity 8.7 / 17

Operational Transparency 1.0 / 11

Contract Governance 0.5 / 10

Discoverability 5.5 / 9

Regulatory Posture 4.6 / 15

Agent readiness — 6/100 · agent aware

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 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

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 Contract +18 pts — api_specs includes an OpenAPI document Ask about this →
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author Ask about this →
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) Ask about this →
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes Ask about this →
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0 Ask about this →
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented) Ask about this →

11 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 0.0 — up to +25.0 composite points Ask about this →
Operational Transparency scores 9.5 — up to +11.8 composite points Ask about this →
Contract Governance scores 4.5 — up to +11.5 composite points Ask about this →

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.

Not sure how this applies to your stack? Ask about any one item. Kin Lane reads every question, looks at your profile and your situation, and replies with what a fix would take — scoped to that one area, priced up front, yours whether you ship it or not. Ask a question →

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/fakturai-de/apis.yml: open an issue on github.com/api-evangelist/fakturai-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 1

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)

APIs 1

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

fakturai invoice API

Generate technically checked EN 16931 ZUGFeRD / Factur‑X invoice PDFs for German B2B workflows.

Fakturai API pricing

Prices published by Fakturai, read 2026-11-07 from fakturai.de/en/pricing. A free plan or tier is listed.

Plan	Price
Free	Free
Starter	€19/ month
Business	€49/ month

Plan details, limits and sources →

Pricing Plans 1

Published pricing tiers and plan structures.

Fakturai Plans Pricing

3 plans

PLANS

Security Posture 3

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

Fakturai Authentication

1 scheme

SECURITY

Fakturai Domain Security

TLSv1.3 · DMARC

SECURITY

Fakturai Vulnerability Disclosure

security.txt · contact published

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

WellKnown

WellKnown

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

Conformance

Conformance

Access & Security 5

Authentication, authorization, and security posture

Security

Security

Authentication

Authentication

SecurityTxt

SecurityTxt

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

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 1

Properties that don't map to a standard resource type

Hosts

Hosts

Source (apis.yml)

aid: fakturai-de
name: Fakturai
description: Fakturai provides a German B2B e-invoicing service that generates ZUGFeRD/Factur‑X compliant PDFs via a REST
  API and MCP server. It supports EN 16931, offers validation against the official KoSIT validator, and integrates with automation
  platforms like Claude, Cursor, n8n, Make, Zapier. The platform includes a SaaS control room, API‑Key management, pricing
  plans, and documentation in German and English.
url: https://artifacts.apis.io/fakturai-de/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-07 (modular-v1; was harvest)
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Freemium · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-13'
  method: derived
specificationVersion: '0.20'
created: '2026-11-07'
modified: '2026-11-07'
tags:
- Invoicing
- E-Invoicing
- German
- Automation
tags_raw:
- invoicing
- e-invoicing
- German
- API
- automation
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Plans
  url: plans/fakturai-de-plans-pricing.yml
- type: Security
  url: https://fakturai.de/de/datenschutz
- type: Authentication
  url: authentication/fakturai-de-authentication.yml
- type: Conformance
  url: conformance/fakturai-de-conformance.yml
- type: LLMsTxt
  url: llms/fakturai-de-llms.txt
- type: SecurityTxt
  url: well-known/fakturai-de-security.txt
- type: WellKnown
  url: well-known/fakturai-de-well-known.yml
- type: Hosts
  url: hosts/fakturai-de-hosts.yml
- type: VulnerabilityDisclosure
  url: security/fakturai-de-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/fakturai-de-domain-security.yml
- type: Website
  url: https://fakturai.de/
- type: Documentation
  url: https://fakturai.de/de/docs/api
- type: APIReference
  url: https://fakturai.de/de/docs/api
- type: GettingStarted
  url: https://fakturai.de/de/signup
- type: Pricing
  url: https://fakturai.de/de/preise
- type: Blog
  url: https://fakturai.de/de/blog
- type: TermsOfService
  url: https://fakturai.de/de/impressum
- type: PrivacyPolicy
  url: https://fakturai.de/de/datenschutz
apis:
- name: fakturai invoice API
  description: Generate technically checked EN 16931 ZUGFeRD / Factur‑X invoice PDFs for German B2B workflows.
  humanURL: https://fakturai.de/de/docs/api
  baseURL: https://api.fakturai.de
  aid: fakturai-de:fakturai-invoice-api
x-enrichment:
  date: '2026-11-07'
  status: enriched
  artifacts_added: 19
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Fakturai API — frequently asked questions

Does Fakturai have an API?

Yes. APIs.io lists 1 API from Fakturai, including fakturai invoice API.

How do I authenticate with the Fakturai API?

Fakturai uses bearer-token authentication (1 scheme). The details are profiled on APIs.io as Fakturai Authentication.

How much does the Fakturai API cost?

Fakturai publishes its prices; its Starter plan is €19/ month as of 2026-11-07. APIs.io lists 3 pricing plans for Fakturai, with each plan's price, limits and inclusions under Pricing on this page.

Is the Fakturai API ready for AI agents?

Fakturai has a Kin Score of 29.3 out of 100 (thin) and an Agent Readiness score of 5.6 (agent-aware), scored by API Evangelist on 2026-11-13.

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

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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.

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