NormAPI

NormAPI provides a German e‑invoicing API supporting XRechnung and ZUGFeRD standards. It offers validation and generation of invoices via REST endpoints, with a free tier of 50 invoices per month and enterprise plans. The service includes documentation, pricing, and legal information, targeting developers and businesses needing compliant e‑invoices in Germany.

NormAPI publishes 1 API contract indexed on the APIs.io network: REST API. Tagged areas include Company, e-invoicing, XRechnung, ZUGFeRD, and Germany.

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

NormAPI’s developer surface includes sandbox, documentation, API reference, pricing, and 16 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

45.4/100 developing Agent 37/100 agent ready Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

3 published contracts 1 MCP Servers

Companye-invoicingXRechnungZUGFeRDGermany

Kin Score

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

Composite quality — 45.4/100 · developing

Contract Quality 10.0 / 21

Developer Ergonomics 6.9 / 17

Access Clarity 10.7 / 17

Operational Transparency 1.2 / 11

Contract Governance 1.9 / 10

Discoverability 6.0 / 9

Regulatory Posture 4.6 / 15

Agent readiness — 37/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 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 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):

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
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks

6 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 47.1 — up to +13.2 composite points
Developer Ergonomics scores 40.5 — up to +11.9 composite points
Operational Transparency scores 10.5 — up to +11.6 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/normapi-com/apis.yml: open an issue on github.com/api-evangelist/normapi-com 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 →

APIs 1

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

NormAPI REST API

API for German e‑invoicing supporting validation, parsing and generation of XRechnung and ZUGFeRD invoices.

MCP Servers 1

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

NormAPI MCP Server

Remote MCP server at normapi.com.

MCP SERVER

Pricing Plans 1

Published pricing tiers and plan structures.

Normapi Com Plans Pricing

5 plans

PLANS

Semantic Vocabularies 1

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

Normapi Com Context

25 classes · 140 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

NormAPI API Rules

12 rules · 10 errors 1 warnings 1 info

SPECTRAL

JSON Schema 7

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

CustomerAllowance

2 properties

JSON SCHEMA

CustomerMonth

0 properties

JSON SCHEMA

CustomerPage

4 properties

JSON SCHEMA

InvoiceRequest

24 properties

JSON SCHEMA

ParseResult

10 properties

JSON SCHEMA

RuleExplained

3 properties

JSON SCHEMA

ValidationResult

8 properties

JSON SCHEMA

Scroll for all 7

Security Posture 3

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

Normapi Com Authentication

http · 1 scheme

SECURITY

Normapi Com Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Normapi Com Vulnerability Disclosure

security.txt · contact published

SECURITY

Agentic Access 1

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

Normapi Com Agentic Access

14 operations · 9 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

Sandbox

Sandbox

DeveloperPortal

DeveloperPortal

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

MCPServer

MCPServer

WellKnown

WellKnown

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

Conformance

Conformance

Build 2

SDKs, sample code, and the tooling you integrate with

SDKs

SDKs

Packages

Packages

Access & Security 4

Authentication, authorization, and security posture

SecurityTxt

SecurityTxt

Security

Security

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Commercial 4

Pricing, plans, and the legal terms of use

Plans

Pricing

TermsOfService

PrivacyPolicy

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: normapi-com
name: NormAPI
image: https://normapi.com/en/opengraph-image-1nh35u?aea9578972dfe4f7
description: NormAPI provides a German e‑invoicing API supporting XRechnung and ZUGFeRD standards. It offers validation and
  generation of invoices via REST endpoints, with a free tier of 50 invoices per month and enterprise plans. The service includes
  documentation, pricing, and legal information, targeting developers and businesses needing compliant e‑invoices in Germany.
url: https://raw.githubusercontent.com/api-evangelist/normapi-com/refs/heads/main/apis.yml
x-type: company
x-source: harvest:new-submission
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-26 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-26'
modified: '2026-10-26'
tags:
- Company
- e-invoicing
- XRechnung
- ZUGFeRD
- Germany
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Plans
  url: plans/normapi-com-plans-pricing.yml
- type: Conformance
  url: conformance/normapi-com-conformance.yml
- type: LLMsTxt
  url: llms/normapi-com-llms.txt
- type: MCPServer
  url: mcp/normapi-com-mcp.yml
- type: SecurityTxt
  url: well-known/normapi-com-normapi-security.txt
- type: WellKnown
  url: well-known/normapi-com-well-known.yml
- type: Hosts
  url: hosts/normapi-com-hosts.yml
- type: SDKs
  url: packages/normapi-com-packages.yml
- type: Packages
  url: packages/normapi-com-packages.yml
- type: Security
  url: https://normapi.com/en/security
- type: Sandbox
  url: https://normapi.com/en/account/playground
- type: DeveloperPortal
  url: https://api.normapi.de</code
- type: VulnerabilityDisclosure
  url: security/normapi-com-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/normapi-com-domain-security.yml
- type: Website
  url: https://normapi.com
- type: Documentation
  url: https://normapi.com/en/docs
- type: APIReference
  url: https://normapi.com/openapi.yaml
- type: Pricing
  url: https://normapi.com/en/pricing
- type: TermsOfService
  url: https://normapi.com/en/terms
- type: PrivacyPolicy
  url: https://normapi.com/en/privacy
apis:
- name: NormAPI REST API
  description: API for German e‑invoicing supporting validation, parsing and generation of XRechnung and ZUGFeRD invoices.
  humanURL: https://normapi.com/en/docs
  baseURL: https://api.normapi.de
  properties:
  - type: OpenAPI
    url: openapi/normapi-com-openapi.yml
  aid: normapi-com:normapi-rest-api
x-submission-notes: OAS 3.1.0, 8 ops; MCP; llms.txt; German e-invoicing
x-submitted-by: dmytro@normapi.de (apis.io/add, 2026-10-26)
x-enrichment:
  date: '2026-10-26'
  status: enriched
  artifacts_added: 19
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

NormAPI — frequently asked questions

Does NormAPI have an API?

Yes. APIs.io lists 1 API from NormAPI, including NormAPI REST API.

Is there an OpenAPI specification for the NormAPI?

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

How do I authenticate with the NormAPI?

NormAPI documents its authentication (http · 1 scheme). The details are profiled on APIs.io as Normapi Com Authentication.

How much does the NormAPI cost?

APIs.io lists 5 pricing plans for NormAPI, with each plan's price, limits and inclusions under Pricing Plans on this page.

Does NormAPI have an MCP server?

Yes. APIs.io lists 1 MCP server for NormAPI: Remote MCP server at normapi.com.

Is the NormAPI ready for AI agents?

NormAPI has a Kin Score of 45.4 out of 100 (developing) and an Agent Readiness score of 36.9 (agent-ready), scored by API Evangelist on 2026-10-31.

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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.
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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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