DDD Invoices website screenshot

DDD Invoices

DDD Invoices is a unified e-invoicing, fiscalization, and real-time tax reporting compliance platform delivered as a single API. It lets software companies, ERPs, SaaS platforms, e-commerce systems, marketplaces, payment providers, and POS vendors issue, receive, and archive locally compliant invoices across 30+ countries without building country-specific tax integrations. The platform handles B2B and B2G e-invoicing over the PEPPOL network, national real-time reporting and fiscalization mandates, AI-assisted invoice document processing, and long-term compliant archival, exposing it all through one JSON API with test and production connection keys. Backed by 500 Global, it raised a USD 1.3M seed round.

DDD Invoices publishes 1 API on the APIs.io network. Tagged areas include Company, e-Invoicing, Fiscalization, Tax Compliance, and Real-Time Reporting.

DDD Invoices’ developer surface includes documentation, API reference, quickstart, pricing, signup flow, engineering blog, support, and 13 more developer resources.

🌐 Visit website 📡 Source on GitHub
31.5/100 thin ▬ flat Agent 21/100 agent aware Full breakdown ↓
scored 2026-07-27 · rubric v0.5
AccessSelf serve
1 APIs 1 MCP Servers
Companye-InvoicingFiscalizationTax ComplianceReal-Time ReportingPEPPOLInvoicingAPI

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 31.5/100 · thin
Contract Quality 0.0 / 25
Developer Ergonomics 11.7 / 20
Commercial Clarity 10.5 / 20
Operational Transparency 0.0 / 13
Governance 0.0 / 12
Discoverability 9.3 / 10
Agent readiness — 21/100 · agent aware
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 15
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
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/ddd-invoices: 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 1

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

DDD Invoices EUeInvoices API

Single JSON API for issuing, receiving, and archiving locally compliant invoices — e-invoicing, PEPPOL exchange, fiscalization, and real-time tax reporting across 30+ countries....

MCP Servers 1

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

ddd-invoices-mcp.yml

MCP SERVER

Security Posture 2

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

Ddd Invoices Authentication

apiKey · 1 scheme

SECURITY

Ddd Invoices Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 4

Portal, sign-up, and the first successful call

Quickstart
Quickstart
 SignUp
SignUp
 Login
Login
 Sandbox
Sandbox

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
 MCPServer
MCPServer

Design & Contract 2

Pagination, idempotency, versioning, errors, and events

Conventions
Conventions
 Conformance
Conformance

Access & Security 3

Authentication, authorization, and security posture

Compliance
Compliance
 Authentication
Authentication
 DomainSecurity
DomainSecurity

Operate 2

Status, limits, changes, and where to get help

Support
Support
 SLA
SLA

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

Source (apis.yml)

apis.yml Raw ↑ 
aid: ddd-invoices
name: DDD Invoices
description: DDD Invoices is a unified e-invoicing, fiscalization, and real-time tax reporting compliance platform delivered
  as a single API. It lets software companies, ERPs, SaaS platforms, e-commerce systems, marketplaces, payment providers,
  and POS vendors issue, receive, and archive locally compliant invoices across 30+ countries without building country-specific
  tax integrations. The platform handles B2B and B2G e-invoicing over the PEPPOL network, national real-time reporting and
  fiscalization mandates, AI-assisted invoice document processing, and long-term compliant archival, exposing it all through
  one JSON API with test and production connection keys. Backed by 500 Global, it raised a USD 1.3M seed round.
url: https://raw.githubusercontent.com/api-evangelist/ddd-invoices/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- 500-global
x-tier: stub
x-tier-reason: portfolio-lead
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-18'
image: https://dddinvoices.com/og/default.png
tags:
- Company
- e-Invoicing
- Fiscalization
- Tax Compliance
- Real-Time Reporting
- PEPPOL
- Invoicing
- API
apis:
- name: DDD Invoices EUeInvoices API
  description: Single JSON API for issuing, receiving, and archiving locally compliant invoices — e-invoicing, PEPPOL exchange,
    fiscalization, and real-time tax reporting across 30+ countries. Uses a custom IoT connection-key header for authentication
    with distinct TEST and PROD keys per legal entity.
  humanURL: https://dddinvoices.com/documentation-e-invoicing
  baseURL: https://app.dddinvoices.com/api/service/
  properties:
  - type: Documentation
    url: https://dddinvoices.com/documentation-e-invoicing
  - type: APIReference
    url: https://api.dddinvoices.com/public-api-playground
  - type: Authentication
    url: authentication/ddd-invoices-authentication.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://dddinvoices.com
- type: Documentation
  url: https://dddinvoices.com/documentation-e-invoicing
- type: APIReference
  url: https://api.dddinvoices.com/public-api-playground
- type: Quickstart
  url: https://dddinvoices.com/builders
- type: Pricing
  url: https://dddinvoices.com/pricing
- type: SignUp
  url: https://app.dddinvoices.com/sign-up
- type: Login
  url: https://app.dddinvoices.com/login
- type: TermsOfService
  url: https://dddinvoices.com/terms-and-conditions
- type: PrivacyPolicy
  url: https://dddinvoices.com/privacy-policy
- type: Blog
  url: https://dddinvoices.com/learn
- type: Support
  url: https://calendly.com/ddd-invoices/30min-intro
- type: SLA
  url: https://dddinvoices.com/service-support-level-agreements
- type: Compliance
  url: https://dddinvoices.com/data-processing
- type: LLMsTxt
  url: llms/ddd-invoices-llms.txt
- type: Authentication
  url: authentication/ddd-invoices-authentication.yml
- type: Conventions
  url: conventions/ddd-invoices-conventions.yml
- type: Sandbox
  url: sandbox/ddd-invoices-sandbox.yml
- type: MCPServer
  url: mcp/ddd-invoices-mcp.yml
- type: Conformance
  url: conformance/ddd-invoices-conformance.yml
- type: DomainSecurity
  url: security/ddd-invoices-domain-security.yml
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence