Vatstack website screenshot

Vatstack

VAT number validation and EU tax rates REST API for validating European business VAT IDs via VIES and accessing current VAT rates for all EU member states. Vatstack provides automated VAT compliance for digital businesses including real-time VAT number validation, EU GST rate synchronization, price quotation engine, and automated VAT reporting for EC Sales List and VAT OSS requirements.

Vatstack publishes 7 APIs on the APIs.io network, including Batches API, Evidences API, Hits API, and 4 more. Tagged areas include VAT, Tax, Validation, EU, and Europe.

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

Vatstack’s developer surface includes authentication, documentation, engineering blog, pricing, and 10 more developer resources.

🌐 Visit website 📡 Source on GitHub
51.7/100 developing ▬ flat Agent 31/100 agent aware Full breakdown ↓
scored 2026-08-05 · rubric v0.9.1
AccessFreemiumSelf serve⚡ Free to try
7 APIs
VATTaxValidationEUEuropeComplianceFinanceBusiness

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-05 · rubric v0.9.1
Composite quality — 51.7/100 · developing
Contract Quality 16.1 / 25
Developer Ergonomics 4.3 / 20
Commercial Clarity 10.0 / 20
Operational Transparency 6.8 / 13
Governance 7.0 / 12
Discoverability 7.4 / 10
Agent readiness — 31/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
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
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/vatstack: 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 7

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

Vatstack Batches API

The Batches API from Vatstack — 2 operation(s) for batches.

Vatstack Evidences API

The Evidences API from Vatstack — 2 operation(s) for evidences.

Vatstack Hits API

The Hits API from Vatstack — 1 operation(s) for hits.

Vatstack Quotes API

The Quotes API from Vatstack — 2 operation(s) for quotes.

Vatstack Rates API

The Rates API from Vatstack — 2 operation(s) for rates.

Vatstack Supplies API

The Supplies API from Vatstack — 2 operation(s) for supplies.

Vatstack Validations API

The Validations API from Vatstack — 2 operation(s) for validations.

Scroll for all 7

Pricing Plans 1

Published pricing tiers and plan structures.

Vatstack Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Vatstack Rate Limits

8 limits

RATE LIMITS

FinOps 1

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

Vatstack Finops

FINOPS

Semantic Vocabularies 1

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

Vatstack Context

9 classes · 21 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Vatstack API Rules

5 rules · 4 warnings 1 info

SPECTRAL

JSON Schema 8

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

Batch

9 properties

JSON SCHEMA

Error

2 properties

JSON SCHEMA

Evidence

7 properties

JSON SCHEMA

Hit

2 properties

JSON SCHEMA

Quote

13 properties

JSON SCHEMA

Rate

11 properties

JSON SCHEMA

Supply

17 properties

JSON SCHEMA

Validation

16 properties

JSON SCHEMA

Scroll for all 8

Examples 8

Example request and response payloads for these APIs.

Batch Example

3 fields

EXAMPLE

Error Example

3 fields

EXAMPLE

Evidence Example

3 fields

EXAMPLE

Hit Example

3 fields

EXAMPLE

Quote Example

3 fields

EXAMPLE

Rate Example

3 fields

EXAMPLE

Supply Example

3 fields

EXAMPLE

Validation Example

3 fields

EXAMPLE

Scroll for all 8

Security Posture 3

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

Vatstack Authentication

apiKey · 1 scheme

SECURITY

Vatstack Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Vatstack Vulnerability Disclosure

security.txt · contact published

SECURITY

Agentic Access 1

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

Vatstack Agentic Access

23 operations · 10 acting

23 operations · 10 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

GitHubOrg
GitHubOrg

Access & Security 3

Authentication, authorization, and security posture

VulnerabilityDisclosure
VulnerabilityDisclosure
 DomainSecurity
DomainSecurity
 Authentication
Authentication

Operate 2

Status, limits, changes, and where to get help

StatusPage
StatusPage
 RateLimits
RateLimits

Commercial 3

Pricing, plans, and the legal terms of use

Pricing
Pricing
 Plans
Plans
 FinOps
FinOps

Company 2

The organization behind the API

Website
Website
 Blog
Blog

Other 1

Properties that don't map to a standard resource type

X
X

Source (apis.yml)

apis.yml Raw ↑ 
aid: vatstack
name: Vatstack
description: VAT number validation and EU tax rates REST API for validating European business VAT IDs via VIES and accessing
  current VAT rates for all EU member states. Vatstack provides automated VAT compliance for digital businesses including
  real-time VAT number validation, EU GST rate synchronization, price quotation engine, and automated VAT reporting for EC
  Sales List and VAT OSS requirements.
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/vatstack.png
url: https://raw.githubusercontent.com/api-evangelist/vatstack/refs/heads/main/apis.yml
created: '2026-06-13'
modified: '2026-06-13'
specificationVersion: '0.19'
tags:
- VAT
- Tax
- Validation
- EU
- Europe
- Compliance
- Finance
- Business
apis:
- aid: vatstack:vatstack-batches-api
  name: Vatstack Batches API
  description: The Batches API from Vatstack — 2 operation(s) for batches.
  humanURL: https://vatstack.com/docs
  baseURL: https://api.vatstack.com/v1
  tags:
  - Batches
  properties:
  - type: OpenAPI
    url: openapi/vatstack-batches-api-openapi.yml
  - type: Documentation
    url: https://vatstack.com/docs
  - type: Authentication
    url: https://vatstack.com/docs/authentication
  - type: Pricing
    url: https://vatstack.com/pricing
  - type: Plans
    url: plans/vatstack-plans-pricing.yml
  - type: RateLimits
    url: rate-limits/vatstack-rate-limits.yml
  - type: FinOps
    url: finops/vatstack-finops.yml
- aid: vatstack:vatstack-evidences-api
  name: Vatstack Evidences API
  description: The Evidences API from Vatstack — 2 operation(s) for evidences.
  humanURL: https://vatstack.com/docs
  baseURL: https://api.vatstack.com/v1
  tags:
  - Evidences
  properties:
  - type: OpenAPI
    url: openapi/vatstack-evidences-api-openapi.yml
  - type: Documentation
    url: https://vatstack.com/docs
  - type: Authentication
    url: https://vatstack.com/docs/authentication
  - type: Pricing
    url: https://vatstack.com/pricing
  - type: Plans
    url: plans/vatstack-plans-pricing.yml
  - type: RateLimits
    url: rate-limits/vatstack-rate-limits.yml
  - type: FinOps
    url: finops/vatstack-finops.yml
- aid: vatstack:vatstack-hits-api
  name: Vatstack Hits API
  description: The Hits API from Vatstack — 1 operation(s) for hits.
  humanURL: https://vatstack.com/docs
  baseURL: https://api.vatstack.com/v1
  tags:
  - Hits
  properties:
  - type: OpenAPI
    url: openapi/vatstack-hits-api-openapi.yml
  - type: Documentation
    url: https://vatstack.com/docs
  - type: Authentication
    url: https://vatstack.com/docs/authentication
  - type: Pricing
    url: https://vatstack.com/pricing
  - type: Plans
    url: plans/vatstack-plans-pricing.yml
  - type: RateLimits
    url: rate-limits/vatstack-rate-limits.yml
  - type: FinOps
    url: finops/vatstack-finops.yml
- aid: vatstack:vatstack-quotes-api
  name: Vatstack Quotes API
  description: The Quotes API from Vatstack — 2 operation(s) for quotes.
  humanURL: https://vatstack.com/docs
  baseURL: https://api.vatstack.com/v1
  tags:
  - Quotes
  properties:
  - type: OpenAPI
    url: openapi/vatstack-quotes-api-openapi.yml
  - type: Documentation
    url: https://vatstack.com/docs
  - type: Authentication
    url: https://vatstack.com/docs/authentication
  - type: Pricing
    url: https://vatstack.com/pricing
  - type: Plans
    url: plans/vatstack-plans-pricing.yml
  - type: RateLimits
    url: rate-limits/vatstack-rate-limits.yml
  - type: FinOps
    url: finops/vatstack-finops.yml
- aid: vatstack:vatstack-rates-api
  name: Vatstack Rates API
  description: The Rates API from Vatstack — 2 operation(s) for rates.
  humanURL: https://vatstack.com/docs
  baseURL: https://api.vatstack.com/v1
  tags:
  - Rates
  properties:
  - type: OpenAPI
    url: openapi/vatstack-rates-api-openapi.yml
  - type: Documentation
    url: https://vatstack.com/docs
  - type: Authentication
    url: https://vatstack.com/docs/authentication
  - type: Pricing
    url: https://vatstack.com/pricing
  - type: Plans
    url: plans/vatstack-plans-pricing.yml
  - type: RateLimits
    url: rate-limits/vatstack-rate-limits.yml
  - type: FinOps
    url: finops/vatstack-finops.yml
- aid: vatstack:vatstack-supplies-api
  name: Vatstack Supplies API
  description: The Supplies API from Vatstack — 2 operation(s) for supplies.
  humanURL: https://vatstack.com/docs
  baseURL: https://api.vatstack.com/v1
  tags:
  - Supplies
  properties:
  - type: OpenAPI
    url: openapi/vatstack-supplies-api-openapi.yml
  - type: Documentation
    url: https://vatstack.com/docs
  - type: Authentication
    url: https://vatstack.com/docs/authentication
  - type: Pricing
    url: https://vatstack.com/pricing
  - type: Plans
    url: plans/vatstack-plans-pricing.yml
  - type: RateLimits
    url: rate-limits/vatstack-rate-limits.yml
  - type: FinOps
    url: finops/vatstack-finops.yml
- aid: vatstack:vatstack-validations-api
  name: Vatstack Validations API
  description: The Validations API from Vatstack — 2 operation(s) for validations.
  humanURL: https://vatstack.com/docs
  baseURL: https://api.vatstack.com/v1
  tags:
  - Validations
  properties:
  - type: OpenAPI
    url: openapi/vatstack-validations-api-openapi.yml
  - type: Documentation
    url: https://vatstack.com/docs
  - type: Authentication
    url: https://vatstack.com/docs/authentication
  - type: Pricing
    url: https://vatstack.com/pricing
  - type: Plans
    url: plans/vatstack-plans-pricing.yml
  - type: RateLimits
    url: rate-limits/vatstack-rate-limits.yml
  - type: FinOps
    url: finops/vatstack-finops.yml
common:
- type: AgenticAccess
  url: agentic-access/vatstack-agentic-access.yml
- type: VulnerabilityDisclosure
  url: security/vatstack-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/vatstack-domain-security.yml
- type: Authentication
  url: authentication/vatstack-authentication.yml
- type: Website
  url: https://vatstack.com
- type: Documentation
  url: https://vatstack.com/docs
- type: GitHubOrg
  url: https://github.com/vatstack
- type: Blog
  url: https://vatstack.com/articles
- type: Pricing
  url: https://vatstack.com/pricing
- type: StatusPage
  url: https://status.vatstack.com
- type: X
  url: https://x.com/vatstack
- type: Plans
  url: plans/vatstack-plans-pricing.yml
- type: RateLimits
  url: rate-limits/vatstack-rate-limits.yml
- type: FinOps
  url: finops/vatstack-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com