sevdesk

sevdesk is a German cloud accounting, invoicing, and bookkeeping platform for freelancers and small businesses. Its RESTful API (base https://my.sevdesk.de/api/v1) exposes everything the web application does - contacts, invoices, orders, credit notes, vouchers (receipts), bank check accounts and transactions, parts (inventory), tags, plus DATEV and CSV exports - authenticated with a per-administrator API token passed in the Authorization header. Nested resources can be pulled in with the embed query parameter.

sevdesk publishes 9 API contracts indexed on the APIs.io network, including CheckAccount API, CheckAccountTransaction API, Contact API, and 6 more. Tagged areas include Accounting, Invoicing, Bookkeeping, Finance, and Germany.

The sevdesk catalog on APIs.io includes 1 Spectral governance ruleset.

sevdesk’s developer surface includes authentication, documentation, engineering blog, and 9 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

29.3/100 thin ▬ flat Agent 21/100 agent aware Front door AI 1/6 silent saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessFreemiumSelf serveFree trial⚡ Free to try

1 published contract

Accounting Invoicing Bookkeeping Finance Germany Vouchers Contacts Software-as-a-Service ERP Financial Software

What this lets a business do 2

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

Financial Management

BC-200

Credit NoteInvoice

POST /Invoice/Factory/saveInvoice POST /Invoice/{invoiceId}/sendViaEmail POST /CreditNote/Factory/saveCreditNote

Customer Relationship Management

BC-420

Contact

GET /Contact GET /Contact/Factory/getNextCustomerNumber

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 29.3/100 · thin

Contract Quality 9.7 / 19

Developer Ergonomics 4.8 / 15

Access Clarity 1.2 / 15

Operational Transparency 1.0 / 10

Contract Governance 1.2 / 9

Discoverability 5.0 / 8

Regulatory Posture 1.8 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 21/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 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 applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

Show this score on your site.

It updates itself when the score changes. Paste this where you link to your API docs:

<a href="https://apis.io/providers/sevdesk/"><img src="https://apis.io/badge/sevdesk/card.svg" alt="sevdesk on APIs.io — Kin Score by API Evangelist"></a>

Other styles, a README pill and a shields.io endpoint are on the badge page.

Raise your score.

Agent readiness — checks not met, largest first (exact, from this profile):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
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)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document

9 more unmet checks in the Agent Readiness table above.

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

Access Clarity scores 7.9 — up to +18.4 composite points
Developer Ergonomics scores 32.1 — up to +13.6 composite points
Contract Quality scores 51.5 — up to +12.1 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/sevdesk/apis.yml: open an issue on github.com/api-evangelist/sevdesk 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.

OpenAPI

measured — observed by APIs.io (published)

APIs 9

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

sevdesk CheckAccount API

Bank and clearing check accounts.

sevdesk CheckAccountTransaction API

Transactions booked against a check account.

sevdesk Contact API

Contacts - customers, suppliers, and other business partners.

sevdesk Invoice API

Outgoing invoices and their lifecycle.

sevdesk Order API

Orders, quotations, and packing lists.

sevdesk Part API

Parts / articles with stock (inventory).

sevdesk Tag API

Tags and tag relations used to label resources.

sevdesk Voucher API

Vouchers (receipts) used for expense and revenue bookkeeping.

sevdesk Credit Note API

Credit notes issued to contacts.

Scroll for all 9

Open Collections 10

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

sevdesk CheckAccount API

OPEN COLLECTION

sevdesk CheckAccount CheckAccountTransaction API

OPEN COLLECTION

sevdesk CheckAccount Contact API

OPEN COLLECTION

sevdesk CheckAccount CreditNote API

OPEN COLLECTION

sevdesk CheckAccount Invoice API

OPEN COLLECTION

sevdesk CheckAccount Order API

OPEN COLLECTION

sevdesk CheckAccount Part API

OPEN COLLECTION

sevdesk CheckAccount Tag API

OPEN COLLECTION

sevdesk CheckAccount Voucher API

OPEN COLLECTION

sevdesk API

OPEN COLLECTION

Scroll for all 10

sevdesk API pricing

Not yet checked against sevdesk's own pricing page. Compiled by API Evangelist on 2026-07-12 from sevdesk.de/preise/; confirm before you rely on a figure. A free plan or tier is listed.

Plan	Price
Free Trial free	—
Rechnung (Invoicing) paid	—
Buchhaltung (Accounting) paid	—
Buchhaltung Pro paid	—
Warenwirtschaft (Inventory / ERP) paid	—

Plan details, limits and sources →

Rate limits

REST API Requests: not published requests
List Pagination: configurable via limit / offset records
Export Jobs: async / progress-tracked jobs

Compiled by API Evangelist, not yet checked against sevdesk's documentation. Rate-limit details →

Pricing Plans 1

Published pricing tiers and plan structures.

Sevdesk Plans Pricing

5 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Sevdesk Rate Limits

3 limits

RATE LIMITS

Service Levels 1

Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.

sevdesk

SLA

FinOps 1

Cost, billing, and metering signals for API financial operations.

Sevdesk Finops

FINOPS

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

sevdesk API Rules

61 rules · 55 errors 4 warnings 2 info

SPECTRAL

Security Posture 2

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

Sevdesk Authentication

apiKey · 1 scheme

SECURITY

Sevdesk Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

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

Sevdesk Agentic Access

30 operations · 13 acting

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 1

Status, limits, changes, and where to get help

RateLimits

RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

Plans

Plans

FinOps

FinOps

Company 3

The organization behind the API

LinkedIn

Website

Website

Blog

Blog

Other 1

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Source (apis.yml)

aid: sevdesk
url: https://raw.githubusercontent.com/api-evangelist/sevdesk/refs/heads/main/apis.yml
name: sevdesk
kind: company
description: sevdesk is a German cloud accounting, invoicing, and bookkeeping platform for freelancers and small businesses.
  Its RESTful API (base https://my.sevdesk.de/api/v1) exposes everything the web application does - contacts, invoices, orders,
  credit notes, vouchers (receipts), bank check accounts and transactions, parts (inventory), tags, plus DATEV and CSV exports
  - authenticated with a per-administrator API token passed in the Authorization header. Nested resources can be pulled in
  with the embed query parameter.
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: true
  try_now: true
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Freemium (free trial) · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/sevdesk.png
x-docs-platform: redocly
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-10-04
tags:
- Accounting
- Invoicing
- Bookkeeping
- Finance
- Germany
- Vouchers
- Contacts
- Software-as-a-Service
- ERP
- Financial Software
tags_raw:
- Accounting
- Invoicing
- Bookkeeping
- Finance
- Germany
- Vouchers
- Contacts
- SaaS
- ERP
- Financial Software
created: '2026-07-12'
modified: '2026-07-12'
specificationVersion: '0.23'
apis:
- aid: sevdesk:sevdesk-checkaccount-api
  name: sevdesk CheckAccount API
  description: Bank and clearing check accounts.
  humanURL: https://api.sevdesk.de/
  baseURL: https://my.sevdesk.de/api/v1
  tags:
  - CheckAccount
  properties:
  - type: OpenAPI
    url: openapi/sevdesk-checkaccount-api-openapi.yml
  - type: Documentation
    url: https://api.sevdesk.de/
  - type: APIReference
    url: https://api.sevdesk.de/
  - type: PostmanCollection
    url: collections/sevdesk.postman_collection.json
  - type: OpenCollection
    url: collections/sevdesk.opencollection.json
- aid: sevdesk:sevdesk-checkaccounttransaction-api
  name: sevdesk CheckAccountTransaction API
  description: Transactions booked against a check account.
  humanURL: https://api.sevdesk.de/
  baseURL: https://my.sevdesk.de/api/v1
  tags:
  - CheckAccountTransaction
  properties:
  - type: OpenAPI
    url: openapi/sevdesk-checkaccounttransaction-api-openapi.yml
  - type: Documentation
    url: https://api.sevdesk.de/
  - type: APIReference
    url: https://api.sevdesk.de/
  - type: PostmanCollection
    url: collections/sevdesk.postman_collection.json
  - type: OpenCollection
    url: collections/sevdesk.opencollection.json
- aid: sevdesk:sevdesk-contact-api
  name: sevdesk Contact API
  description: Contacts - customers, suppliers, and other business partners.
  humanURL: https://api.sevdesk.de/
  baseURL: https://my.sevdesk.de/api/v1
  tags:
  - Contact
  properties:
  - type: OpenAPI
    url: openapi/sevdesk-contact-api-openapi.yml
  - type: Documentation
    url: https://api.sevdesk.de/
  - type: APIReference
    url: https://api.sevdesk.de/
  - type: PostmanCollection
    url: collections/sevdesk.postman_collection.json
  - type: OpenCollection
    url: collections/sevdesk.opencollection.json
- aid: sevdesk:sevdesk-invoice-api
  name: sevdesk Invoice API
  description: Outgoing invoices and their lifecycle.
  humanURL: https://api.sevdesk.de/
  baseURL: https://my.sevdesk.de/api/v1
  tags:
  - Invoices
  tags_raw:
  - Invoice
  properties:
  - type: OpenAPI
    url: openapi/sevdesk-invoice-api-openapi.yml
  - type: Documentation
    url: https://api.sevdesk.de/
  - type: APIReference
    url: https://api.sevdesk.de/
  - type: PostmanCollection
    url: collections/sevdesk.postman_collection.json
  - type: OpenCollection
    url: collections/sevdesk.opencollection.json
- aid: sevdesk:sevdesk-order-api
  name: sevdesk Order API
  description: Orders, quotations, and packing lists.
  humanURL: https://api.sevdesk.de/
  baseURL: https://my.sevdesk.de/api/v1
  tags:
  - Order
  properties:
  - type: OpenAPI
    url: openapi/sevdesk-order-api-openapi.yml
  - type: Documentation
    url: https://api.sevdesk.de/
  - type: APIReference
    url: https://api.sevdesk.de/
  - type: PostmanCollection
    url: collections/sevdesk.postman_collection.json
  - type: OpenCollection
    url: collections/sevdesk.opencollection.json
- aid: sevdesk:sevdesk-part-api
  name: sevdesk Part API
  description: Parts / articles with stock (inventory).
  humanURL: https://api.sevdesk.de/
  baseURL: https://my.sevdesk.de/api/v1
  tags:
  - Part
  properties:
  - type: OpenAPI
    url: openapi/sevdesk-part-api-openapi.yml
  - type: Documentation
    url: https://api.sevdesk.de/
  - type: APIReference
    url: https://api.sevdesk.de/
  - type: PostmanCollection
    url: collections/sevdesk.postman_collection.json
  - type: OpenCollection
    url: collections/sevdesk.opencollection.json
- aid: sevdesk:sevdesk-tag-api
  name: sevdesk Tag API
  description: Tags and tag relations used to label resources.
  humanURL: https://api.sevdesk.de/
  baseURL: https://my.sevdesk.de/api/v1
  tags:
  - Tag
  properties:
  - type: OpenAPI
    url: openapi/sevdesk-tag-api-openapi.yml
  - type: Documentation
    url: https://api.sevdesk.de/
  - type: APIReference
    url: https://api.sevdesk.de/
  - type: PostmanCollection
    url: collections/sevdesk.postman_collection.json
  - type: OpenCollection
    url: collections/sevdesk.opencollection.json
- aid: sevdesk:sevdesk-voucher-api
  name: sevdesk Voucher API
  description: Vouchers (receipts) used for expense and revenue bookkeeping.
  humanURL: https://api.sevdesk.de/
  baseURL: https://my.sevdesk.de/api/v1
  tags:
  - Voucher
  properties:
  - type: OpenAPI
    url: openapi/sevdesk-voucher-api-openapi.yml
  - type: Documentation
    url: https://api.sevdesk.de/
  - type: APIReference
    url: https://api.sevdesk.de/
  - type: PostmanCollection
    url: collections/sevdesk.postman_collection.json
  - type: OpenCollection
    url: collections/sevdesk.opencollection.json
- aid: sevdesk:sevdesk-credit-note-api
  name: sevdesk Credit Note API
  description: Credit notes issued to contacts.
  humanURL: https://api.sevdesk.de/
  baseURL: https://my.sevdesk.de/api/v1
  tags:
  - CreditNote
  tags_raw:
  - Credit Note
  properties:
  - type: OpenAPI
    url: openapi/sevdesk-credit-note-api-openapi.yml
  - type: Documentation
    url: https://api.sevdesk.de/
  - type: APIReference
    url: https://api.sevdesk.de/
  - type: PostmanCollection
    url: collections/sevdesk.postman_collection.json
  - type: OpenCollection
    url: collections/sevdesk.opencollection.json
common:
- type: CapabilityMap
  url: capabilities/sevdesk-capability-edges.yml
  name: sevdesk Business Capability Map
- type: AgenticAccess
  url: agentic-access/sevdesk-agentic-access.yml
- type: DomainSecurity
  url: security/sevdesk-domain-security.yml
- type: Authentication
  url: authentication/sevdesk-authentication.yml
- type: GitHubOrganization
  url: https://github.com/sevdesk
- type: LinkedIn
  url: https://www.linkedin.com/company/sevdesk
- type: Website
  url: https://sevdesk.de
- type: Documentation
  url: https://api.sevdesk.de/
- type: Plans
  url: plans/sevdesk-plans-pricing.yml
- type: RateLimits
  url: rate-limits/sevdesk-rate-limits.yml
- type: FinOps
  url: finops/sevdesk-finops.yml
- url: https://tech.sevdesk.com/
  type: Blog
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

sevdesk API — frequently asked questions

Does sevdesk have an API?

Yes. APIs.io lists 9 APIs from sevdesk, including sevdesk CheckAccount API, sevdesk CheckAccountTransaction API and sevdesk Contact API, and 6 more.

Is there an OpenAPI specification for the sevdesk API?

Yes. APIs.io indexes 9 OpenAPI specifications for sevdesk, each linked for download from this page.

How do I authenticate with the sevdesk API?

sevdesk uses bearer-token authentication (apiKey · 1 scheme). The details are profiled on APIs.io as Sevdesk Authentication.

How much does the sevdesk API cost?

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

Is the sevdesk API ready for AI agents?

sevdesk has a Kin Score of 29.3 out of 100 (thin) and an Agent Readiness score of 20.7 (agent-aware), scored by API Evangelist on 2026-11-06.

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

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
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.

All 92 tools →

Call it yourself

curl for this page

This provider

curl "https://apis.io/api/v1/providers/sevdesk"

All providers

curl "https://apis.io/api/v1/providers?limit=25"

Every operation they expose

curl "https://apis.io/api/v1/providers/sevdesk/operations?limit=25"

How their score was established

curl "https://apis.io/api/v1/providers/sevdesk/evidence"

Calls without X-API-Key need no key. Calls with it need a paid plan — get a key.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.