Taxfix

Taxfix is a Berlin-based fintech that lets individuals and self-employed people in Germany prepare and file their annual income tax return from a mobile app or web browser. Users either answer a guided set of roughly 70 questions to self-file (Taxfix Basic) or hand the return to an independent tax expert via the Expert Service, with data transmitted to the tax authority over the official ELSTER interface. The company reports more than 10 million tax returns filed and over 5 billion euros in refunds. Taxfix is a consumer (B2C) product and does not publish a public developer API, developer portal, or API documentation; this profile captures its public identity and domain-security posture. Backed by Creandum, Index Ventures and Speedinvest.

Taxfix is profiled on the APIs.io network. Tagged areas include Company, Fintech, Tax, Taxes, and Tax Filing.

Taxfix’s developer surface includes pricing, engineering blog, support, and 4 more developer resources.

🌐 Visit website 📡 Source on GitHub

14.4/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5

0 APIs

CompanyFintechTaxTaxesTax FilingPersonal FinanceGermanyMobile

Kin Score

Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5

Composite quality — 14.4/100 · minimal

Contract Quality 0.0 / 25

Developer Ergonomics 1.3 / 20

Commercial Clarity 6.3 / 20

Operational Transparency 0.0 / 13

Governance 0.0 / 12

Discoverability 6.8 / 10

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 15

MCP Server 0 / 12

Machine-Readable Auth 0 / 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/taxfix: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

PrivacyPolicy

PrivacyPolicy

TermsOfService

TermsOfService

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: taxfix
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/taxfix.png
name: Taxfix
description: Taxfix is a Berlin-based fintech that lets individuals and self-employed people in Germany prepare and file their
  annual income tax return from a mobile app or web browser. Users either answer a guided set of roughly 70 questions to self-file
  (Taxfix Basic) or hand the return to an independent tax expert via the Expert Service, with data transmitted to the tax
  authority over the official ELSTER interface. The company reports more than 10 million tax returns filed and over 5 billion
  euros in refunds. Taxfix is a consumer (B2C) product and does not publish a public developer API, developer portal, or API
  documentation; this profile captures its public identity and domain-security posture. Backed by Creandum, Index Ventures
  and Speedinvest.
url: https://raw.githubusercontent.com/api-evangelist/taxfix/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- creandum
- index-ventures
- speedinvest
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-21'
tags:
- Company
- Fintech
- Tax
- Taxes
- Tax Filing
- Personal Finance
- Germany
- Mobile
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://taxfix.de/
- type: Pricing
  url: https://taxfix.de/kosten/
- type: Blog
  url: https://taxfix.de/ratgeber/
- type: Support
  url: https://support.taxfix.de/hc/de
- type: PrivacyPolicy
  url: https://taxfix.de/datenschutz/
- type: TermsOfService
  url: https://taxfix.de/agb/
- type: DomainSecurity
  url: security/taxfix-domain-security.yml
x-enrichment:
  date: '2026-07-21'
  status: minimal
  artifacts_added: 1
  pass: local-v1