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Germany E-Invoice Deadline Guide

For any date and prior-year turnover: must a German business receive or issue a structured e-invoice, which formats qualify, and when does its own deadline start

Unify Dynamics LLC

Documentation
Tools6read-only
Sign-inNoneno account, no key
Data keptNoneprocessed in memory
PriceFreeoptional Pro limits
StatusLiveMCP + REST
Works withMCP · RESTany agent

Try asking

Real questions, and the tools your agent calls to answer them.

It is March 2027 and my 2026 turnover was EUR 650,000: must I send e-invoices to my German business customers?
Tools called
get_einvoice_obligations
How many days until I must issue e-invoices if my 2026 turnover is about EUR 900,000?
Tools called
days_to_issue_deadline
Does a EUR 240 invoice have to be an e-invoice?
Tools called
check_small_invoice_exemption
Is a ZUGFeRD 2.3 invoice in the BASIC-WL profile accepted as an e-invoice in Germany?
Tools called
check_format_acceptance
As a Kleinunternehmer, do I have to receive e-invoices, and when does anything change for me?
Tools called
explain_kleinunternehmer_position
get_timeline

About

Germany E-Invoice Deadline Guide answers the questions a small German business has about the domestic B2B e-invoice mandate (E-Rechnung). get_einvoice_obligations says, for a date and a prior-year turnover, whether the business must be able to receive e-invoices (since 1 January 2025) and whether it must issue them (transition until the end of 2026, until the end of 2027 for issuers with prior-year turnover up to EUR 800,000, all issuers from 2028). days_to_issue_deadline counts the days until the business's own issuing obligation starts. check_small_invoice_exemption applies the EUR 250 gross limit for small-amount invoices. check_format_acceptance tests whether XRechnung, ZUGFeRD (version 2.0.1 or later, not the MINIMUM and BASIC-WL profiles) or another format qualifies. explain_kleinunternehmer_position states what applies to small businesses under the section 19 UStG scheme. get_timeline lists every dated step with its status and source. Each step names the Federal Ministry of Finance page it comes from, the date of the data and how well it was verified; later BMF letters can shift dates, so the answers say what the page says and when, and leave tax interpretation to a Steuerberater.

Sources: Reference data from official sources (bundesfinanzministerium.de, frankfurt-main.ihk.de); every answer states its source, date and validity period.

Privacy

The publisher, Unify Dynamics LLC, states that tool inputs are processed in memory and not retained.

Data not collectedNo account, no profile, no stored prompts or results.
Privacy policyTerms

What it can do

6 tools, grouped by job. Every one is read-only or compute-only.

OpenAPI
Look up & validate4 tools
  • Get einvoice obligationsReceive and issue obligations of the German domestic B2B e-invoice mandate for a date and prior-year turnover, with the applicable exemptions.
  • Check small invoice exemptionWhether an invoice up to EUR 250 gross (small-amount invoice, section 33 UStDV) falls outside the e-invoice duty.
  • Check format acceptanceWhether an invoice format, version and profile (XRechnung, ZUGFeRD, other EN 16931 formats, PDF) qualifies as an e-invoice.
  • Get timelineFull dated timeline of the mandate with status, effective date, quotes and source page for each step.
Reference & guides2 tools
  • Days to issue deadlineDays until the business's own obligation to issue e-invoices starts, from its 2026 turnover (EUR 800,000 rule).
  • Explain kleinunternehmer positionWhat the e-invoice mandate says about small businesses under section 19 UStG: no duty to issue, but able to receive.

Information

PublisherUnify Dynamics LLC
CategoryMoney & business
LanguagesEnglish
Built forGermany
CompatibilityAny MCP client · any agent · REST
Version0.1.0
MCP endpointhttps://de-einvoice-timeline.connectorbay.com/mcp
REST APIopenapi.json
SupportGet help · Status
CountryGermany
FunctionInvoicing & tax
LayerDeep connectors

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Documentation

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Germany E-Invoice Deadline Guide — connector documentation

  • MCP endpoint: https://de-einvoice-timeline.connectorbay.com/mcp
  • REST API: POST https://de-einvoice-timeline.connectorbay.com/v1/tools/{tool_name}, described by the OpenAPI 3.1 spec at https://de-einvoice-timeline.connectorbay.com/openapi.json
  • Transport: Streamable HTTP, stateless, MCP specification 2025-06-18 or later
  • Authentication: none required. An optional Authorization: Bearer <key> raises rate limits.
  • Health: https://de-einvoice-timeline.connectorbay.com/health · Tool schemas: https://de-einvoice-timeline.connectorbay.com/tools.json
  • Publisher: Unify Dynamics LLC · connectorbay.com/de-einvoice-timeline · agent@connectorbay.com

What Germany E-Invoice Deadline Guide is for

Germany E-Invoice Deadline Guide answers the questions a small German business has about the domestic B2B e-invoice mandate (E-Rechnung). get_einvoice_obligations says, for a date and a prior-year turnover, whether the business must be able to receive e-invoices (since 1 January 2025) and whether it must issue them (transition until the end of 2026, until the end of 2027 for issuers with prior-year turnover up to EUR 800,000, all issuers from 2028). days_to_issue_deadline counts the days until the business's own issuing obligation starts. check_small_invoice_exemption applies the EUR 250 gross limit for small-amount invoices. check_format_acceptance tests whether XRechnung, ZUGFeRD (version 2.0.1 or later, not the MINIMUM and BASIC-WL profiles) or another format qualifies. explain_kleinunternehmer_position states what applies to small businesses under the section 19 UStG scheme. get_timeline lists every dated step with its status and source. Each step names the Federal Ministry of Finance page it comes from, the date of the data and how well it was verified; later BMF letters can shift dates, so the answers say what the page says and when, and leave tax interpretation to a Steuerberater.

Ask your assistant things like:

  • "It is March 2027 and my 2026 turnover was EUR 650,000: must I send e-invoices to my German business customers?"
  • "How many days until I must issue e-invoices if my 2026 turnover is about EUR 900,000?"
  • "Does a EUR 240 invoice have to be an e-invoice?"
  • "Is a ZUGFeRD 2.3 invoice in the BASIC-WL profile accepted as an e-invoice in Germany?"
  • "As a Kleinunternehmer, do I have to receive e-invoices, and when does anything change for me?"

What it does

  • get_einvoice_obligations: Receive and issue obligations of the German domestic B2B e-invoice mandate for a date and prior-year turnover, with the applicable exemptions.
  • days_to_issue_deadline: Days until the business's own obligation to issue e-invoices starts, from its 2026 turnover (EUR 800,000 rule).
  • check_small_invoice_exemption: Whether an invoice up to EUR 250 gross (small-amount invoice, section 33 UStDV) falls outside the e-invoice duty.
  • check_format_acceptance: Whether an invoice format, version and profile (XRechnung, ZUGFeRD, other EN 16931 formats, PDF) qualifies as an e-invoice.
  • explain_kleinunternehmer_position: What the e-invoice mandate says about small businesses under section 19 UStG: no duty to issue, but able to receive.
  • get_timeline: Full dated timeline of the mandate with status, effective date, quotes and source page for each step.

Data sources

Reference data from official sources (bundesfinanzministerium.de, frankfurt-main.ihk.de); every answer states its source, date and validity period.

What it is not

Germany E-Invoice Deadline Guide is independent; not affiliated with, endorsed by or operated by any government body, central bank, standards body or scheme operator. Names of rails, schemes and standards are used only to say what a tool works with. It is read-only: it never sends, pays, files or signs anything for you, and it never looks up private individuals.

Not advice. General information only, not legal, tax, accounting or payment advice. Germany E-Invoice Deadline Guide is an independent tool: it is not affiliated with, endorsed by or operated by any government body, central bank, standards body or scheme operator. Rates, thresholds and rules change; check the cited official source and confirm with a qualified professional before you rely on a result.

Built for: Germany. Languages: English.

Tools

Look up & validate

get_einvoice_obligations — Receive and issue obligations of the German domestic B2B e-invoice mandate for a date and prior-year turnover, with the applicable exemptions. Use for "It is 15 March 2027 and my 2026 turnover was EUR 650,000: must I send e-invoices to my German business customers?". Args: on_date, prior_year_turnover_eur, business_type, customer_type, domestic.

check_small_invoice_exemption — Whether an invoice up to EUR 250 gross (small-amount invoice, section 33 UStDV) falls outside the e-invoice duty. Use for "I issue a EUR 240 invoice: does it need to be an e-invoice?". Args: gross_amount_eur, on_date.

check_format_acceptance — Whether an invoice format, version and profile (XRechnung, ZUGFeRD, other EN 16931 formats, PDF) qualifies as an e-invoice. Use for "Is a ZUGFeRD 2.3 invoice in the BASIC-WL profile accepted as an e-invoice in Germany?". Args: format, version, profile.

get_timeline — Full dated timeline of the mandate with status, effective date, quotes and source page for each step. Use for "Give me the complete German e-invoice timeline with dates and sources.". Args: on_date.

Reference & guides

days_to_issue_deadline — Days until the business's own obligation to issue e-invoices starts, from its 2026 turnover (EUR 800,000 rule). Use for "My 2026 turnover will be about EUR 900,000: how many days until I must issue e-invoices?". Args: turnover_2026_eur, business_type, on_date.

explain_kleinunternehmer_position — What the e-invoice mandate says about small businesses under section 19 UStG: no duty to issue, but able to receive. Use for "I am a Kleinunternehmer: do I have to issue or receive e-invoices?". Args: on_date.

Conventions

  • Read-only. Every tool reads public data or computes; nothing is written anywhere and nothing about the user is stored.
  • Result envelope. ok: true with data, or ok: false with a structured error (bad_input, not_found, upstream_error). degraded lists optional sources that were unreachable.
  • Rate limits. Free tier 60 tool calls/minute and 300/day per user (keyed on the user identifier supplied by the host agent, else client IP); Pro keys raise this. Over-limit calls return HTTP 429 with Retry-After. initialize and tools/list are never counted.

Support

agent@connectorbay.com · connectorbay.com/de-einvoice-timeline/support

Privacy policy

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Germany E-Invoice Deadline Guide — Privacy Policy

Effective 29 September 2026. Unify Dynamics LLC ("we", "us"), Menlo Park, California.

What Germany E-Invoice Deadline Guide is. Germany E-Invoice Deadline Guide is a connector (an MCP server and REST API) that AI assistants call on your behalf: For any date and prior-year turnover: must a German business receive or issue a structured e-invoice, which formats qualify, and when does its own deadline start. You talk to your assistant; the assistant sends us only the arguments needed for that one request.

What we receive. The arguments of each tool call, the technical headers needed to serve the request (an IP address or a client identifier supplied by the assistant, and a Pro API key if you have one), and standard server logs.

Nothing is stored. Every tool is a local calculation or a lookup against bundled reference data; no request is forwarded to any third party. Arguments are used for that one response and are not logged in request bodies, recorded, or used to train anything.

What we do not receive or store. We do not receive your conversation with the assistant, your name, contacts or account credentials, and we build no profile: each request is answered independently. Rate-limit counters (a client identifier and timestamps) are held in memory for at most 24 hours. Hosting access logs (IP addresses and request paths, not request bodies) are kept for up to 30 days for security and abuse prevention.

Sub-processors. None. Hosting: Vercel (United States regions).

Your rights. Because we store no personal data beyond short-lived logs, requests to access, correct or delete data are usually satisfied automatically; you can still contact agent@connectorbay.com and we will respond within 30 days. We do not sell or share personal information.

Children. Germany E-Invoice Deadline Guide is a general-audience service operated by the adult using the assistant.

Changes. We will post changes here with a new effective date.

Terms of service

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Germany E-Invoice Deadline Guide — Terms of Service

Effective 29 September 2026. These terms govern use of the Germany E-Invoice Deadline Guide connector ("the Service") operated by Unify Dynamics LLC ("we", "us").

  1. The Service. Germany E-Invoice Deadline Guide provides: For any date and prior-year turnover: must a German business receive or issue a structured e-invoice, which formats qualify, and when does its own deadline start. It is accessed through an AI assistant or directly over MCP or HTTP, and is read-only.
  2. General information, not professional advice. Output is general information and a drafting aid. It is not legal, tax, accounting, financial or payment advice, and it is not a filing or a payment instruction. General information only, not legal, tax, accounting or payment advice. Germany E-Invoice Deadline Guide is an independent tool: it is not affiliated with, endorsed by or operated by any government body, central bank, standards body or scheme operator. Rates, thresholds and rules change; check the cited official source and confirm with a qualified professional before you rely on a result.
  3. Independent. Germany E-Invoice Deadline Guide is independent; not affiliated with, endorsed by or operated by any government body, central bank, standards body or scheme operator. Official names are used only to describe what a tool works with.
  4. Sources and dates. Reference values state their source, date and validity period. Rules change: check the cited official source before you rely on a result.
  5. Acceptable use. Automated use within the published rate limits is welcome. Do not use the Service to look up private individuals or to circumvent any authority's controls.
  6. Availability. The Service is provided "as is" without warranty. We may change, limit or discontinue it at any time.
  7. Data. Our Privacy Policy describes what we process. In short: your input is answered on our server and nothing is stored.
  8. Pro keys. Optional Pro API keys are issued at our discretion, are personal to the holder and may be revoked for abuse.
  9. Liability. To the fullest extent permitted by law, Unify Dynamics LLC is not liable for any loss arising from use of or reliance on the Service. Our total liability is limited to US $100.
  10. Governing law. California law; venue in San Mateo County, California.
  11. Contact. Unify Dynamics LLC · agent@connectorbay.com · https://connectorbay.com/de-einvoice-timeline

Support

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Germany E-Invoice Deadline Guide support

Email agent@connectorbay.com. We answer within two business days.

When you report a problem, include the question you asked your agent, roughly when, and which agent you used (for example Claude, ChatGPT or Gemini). Never send us passwords, account numbers or ID numbers. Germany E-Invoice Deadline Guide never asks for them.

Get Germany E-Invoice Deadline Guide

Free · No sign-in · Read-only

Streamable HTTP, stateless, no authentication. Paste the endpoint into any MCP-capable agent.

https://de-einvoice-timeline.connectorbay.com/mcp
{
  "mcpServers": {
    "de-einvoice-timeline": {
      "type": "http",
      "url": "https://de-einvoice-timeline.connectorbay.com/mcp"
    }
  }
}