weclapp

weclapp is a German cloud ERP / CRM / commerce platform for small and mid-sized businesses, combining CRM, sales, order management, accounting, inventory / warehouse management, purchasing, and e-commerce in one SaaS suite. Every weclapp tenant exposes a documented REST API at https://.weclapp.com/webapp/api/v1/ with a live Swagger, covering 150+ business entities - parties (customers, suppliers, contacts, leads), articles, sales orders, quotations, sales invoices, shipments, purchase orders, warehouses, and more. Authentication is a per-user API token sent in the AuthenticationToken request header.

weclapp publishes 7 API contracts indexed on the APIs.io network, including Article API, Customer API, Purchase Order API, and 4 more. Tagged areas include ERP, CRM, Cloud ERP, Accounting, and Inventory.

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

weclapp’s developer surface includes engineering blog, pricing, authentication, documentation, and 8 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

33.4/100 thin ▬ flat Agent 20/100 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 →

AccessPaid

1 published contract

ERP CRM Cloud ERP Accounting Inventory Commerce Germany Order Management Business Software Software-as-a-Service

What this lets a business do 5

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

Procurement Management

BC-500

Purchase Order

POST /purchaseOrder

Customer Relationship Management

BC-420

Customer

POST /customer

Financial Management

BC-200

Sales Invoice

POST /salesInvoice

Sales Management

BC-410

Quotation

POST /quotation

Information & Data Management

BC-610

Article

GET /article

Kin Score

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

Composite quality — 33.4/100 · thin

Contract Quality 8.9 / 19

Developer Ergonomics 4.8 / 15

Access Clarity 5.5 / 15

Operational Transparency 0.5 / 10

Contract Governance 1.2 / 9

Discoverability 5.0 / 8

Regulatory Posture 1.8 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 20/100 · 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/.

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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):

Developer Ergonomics scores 32.1 — up to +13.6 composite points
Contract Quality scores 47.6 — up to +13.1 composite points
Access Clarity scores 36.8 — up to +12.6 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/weclapp/apis.yml: open an issue on github.com/api-evangelist/weclapp 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 →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Amazon Seller Ecosystem (Selling Partner Appstore, Amazon Ads partners)	builds-on	19.7 (thin)	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

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 7

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

weclapp Article API

Articles / products in the catalog.

weclapp Customer API

Customer master data (a party in the customer role).

weclapp Purchase Order API

Purchase orders to suppliers.

weclapp Quotation API

Sales quotations / quotes.

weclapp Sales Invoice API

Sales invoices.

weclapp Sales Order API

Sales orders.

weclapp Shipment API

Outbound shipments / deliveries.

Scroll for all 7

Open Collections 8

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

weclapp REST Article API

OPEN COLLECTION

weclapp REST Article Customer API

OPEN COLLECTION

weclapp REST Article Purchase Order API

OPEN COLLECTION

weclapp REST Article Quotation API

OPEN COLLECTION

weclapp REST Article Sales Invoice API

OPEN COLLECTION

weclapp REST Article Sales Order API

OPEN COLLECTION

weclapp REST Article Shipment API

OPEN COLLECTION

weclapp REST API

OPEN COLLECTION

Scroll for all 8

weclapp API pricing

Prices published by weclapp, read 2026-09-20 from www.weclapp.com/en/pricing/.

Plan	Price
ERP Starter	€ 39 per month/user* Includes: Contact Management, Quotations & invoices, Tasks & projects, Accounting & banking, Reporting, E-Invo
ERP Services (yearly)	€ 86 per month/user* Includes: all modules from the ERP Starter package, CRM, Project Management, Time tracking, API-access
ERP Trade (yearly)	€ 163 per month/user* Includes: all modules from the ERP Starter & ERP Service package, Warehouse Management, Production, store/mark
ERP Services (monthly)	€ 95 per month/user*
ERP Trade (monthly)	€ 179 per month/user*
Enterprise	customized quote with price advantages Includes: all modules from ERP Trade, Dedicated Account Manager
Add-on: Contract Management	55€ monthly
Add-on: Helpdesk	55€ monthly

All 15 plans, limits and sources →

Rate limits

REST API Requests: not published requests
Page Size: configurable via pageSize results

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

Pricing Plans 2

Published pricing tiers and plan structures.

Weclapp Plans Pricing

15 plans

PLANS

Weclapp Price Estimates

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Weclapp Rate Limits

2 limits

RATE LIMITS

Service Levels 1

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

weclapp

SLA

FinOps 1

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

Weclapp Finops

FINOPS

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

weclapp API Rules

58 rules · 56 errors 1 warnings 1 info

SPECTRAL

Security Posture 2

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

Weclapp Authentication

apiKey · 1 scheme

SECURITY

Weclapp Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Agentic Access 1

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

Weclapp Agentic Access

42 operations · 21 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

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 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

Plans

Plans

FinOps

FinOps

Company 3

The organization behind the API

Blog

Blog

LinkedIn

Website

Website

Other 1

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Source (apis.yml)

aid: weclapp
url: https://raw.githubusercontent.com/api-evangelist/weclapp/refs/heads/main/apis.yml
name: weclapp
kind: company
description: weclapp is a German cloud ERP / CRM / commerce platform for small and mid-sized businesses, combining CRM, sales,
  order management, accounting, inventory / warehouse management, purchasing, and e-commerce in one SaaS suite. Every weclapp
  tenant exposes a documented REST API at https://<tenant>.weclapp.com/webapp/api/v1/ with a live Swagger, covering 150+ business
  entities - parties (customers, suppliers, contacts, leads), articles, sales orders, quotations, sales invoices, shipments,
  purchase orders, warehouses, and more. Authentication is a per-user API token sent in the AuthenticationToken request header.
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: paid
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Paid
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/weclapp.png
tags:
- ERP
- CRM
- Cloud ERP
- Accounting
- Inventory
- Commerce
- Germany
- Order Management
- Business Software
- Software-as-a-Service
tags_raw:
- ERP
- CRM
- Cloud ERP
- Accounting
- Inventory
- Commerce
- Germany
- Order Management
- Business Software
- SaaS
created: '2026-07-12'
modified: '2026-10-06'
specificationVersion: '0.23'
apis:
- aid: weclapp:weclapp-article-api
  name: weclapp Article API
  description: Articles / products in the catalog.
  humanURL: https://www.weclapp.com/api/
  baseURL: https://{tenant}.weclapp.com/webapp/api/v1
  tags:
  - Article
  properties:
  - type: OpenAPI
    url: openapi/weclapp-article-api-openapi.yml
  - type: Documentation
    url: https://www.weclapp.com/api/
  - type: APIReference
    url: https://www.weclapp.com/api/
  - type: PostmanCollection
    url: collections/weclapp.postman_collection.json
  - type: OpenCollection
    url: collections/weclapp.opencollection.json
- aid: weclapp:weclapp-customer-api
  name: weclapp Customer API
  description: Customer master data (a party in the customer role).
  humanURL: https://www.weclapp.com/api/
  baseURL: https://{tenant}.weclapp.com/webapp/api/v1
  tags:
  - Customers
  tags_raw:
  - Customer
  properties:
  - type: OpenAPI
    url: openapi/weclapp-customer-api-openapi.yml
  - type: Documentation
    url: https://www.weclapp.com/api/
  - type: APIReference
    url: https://www.weclapp.com/api/
  - type: PostmanCollection
    url: collections/weclapp.postman_collection.json
  - type: OpenCollection
    url: collections/weclapp.opencollection.json
- aid: weclapp:weclapp-purchase-order-api
  name: weclapp Purchase Order API
  description: Purchase orders to suppliers.
  humanURL: https://www.weclapp.com/api/
  baseURL: https://{tenant}.weclapp.com/webapp/api/v1
  tags:
  - Purchase Order
  properties:
  - type: OpenAPI
    url: openapi/weclapp-purchase-order-api-openapi.yml
  - type: Documentation
    url: https://www.weclapp.com/api/
  - type: APIReference
    url: https://www.weclapp.com/api/
  - type: PostmanCollection
    url: collections/weclapp.postman_collection.json
  - type: OpenCollection
    url: collections/weclapp.opencollection.json
- aid: weclapp:weclapp-quotation-api
  name: weclapp Quotation API
  description: Sales quotations / quotes.
  humanURL: https://www.weclapp.com/api/
  baseURL: https://{tenant}.weclapp.com/webapp/api/v1
  tags:
  - Quotation
  properties:
  - type: OpenAPI
    url: openapi/weclapp-quotation-api-openapi.yml
  - type: Documentation
    url: https://www.weclapp.com/api/
  - type: APIReference
    url: https://www.weclapp.com/api/
  - type: PostmanCollection
    url: collections/weclapp.postman_collection.json
  - type: OpenCollection
    url: collections/weclapp.opencollection.json
- aid: weclapp:weclapp-sales-invoice-api
  name: weclapp Sales Invoice API
  description: Sales invoices.
  humanURL: https://www.weclapp.com/api/
  baseURL: https://{tenant}.weclapp.com/webapp/api/v1
  tags:
  - Sales Invoice
  properties:
  - type: OpenAPI
    url: openapi/weclapp-sales-invoice-api-openapi.yml
  - type: Documentation
    url: https://www.weclapp.com/api/
  - type: APIReference
    url: https://www.weclapp.com/api/
  - type: PostmanCollection
    url: collections/weclapp.postman_collection.json
  - type: OpenCollection
    url: collections/weclapp.opencollection.json
- aid: weclapp:weclapp-sales-order-api
  name: weclapp Sales Order API
  description: Sales orders.
  humanURL: https://www.weclapp.com/api/
  baseURL: https://{tenant}.weclapp.com/webapp/api/v1
  tags:
  - Sales Order
  properties:
  - type: OpenAPI
    url: openapi/weclapp-sales-order-api-openapi.yml
  - type: Documentation
    url: https://www.weclapp.com/api/
  - type: APIReference
    url: https://www.weclapp.com/api/
  - type: PostmanCollection
    url: collections/weclapp.postman_collection.json
  - type: OpenCollection
    url: collections/weclapp.opencollection.json
- aid: weclapp:weclapp-shipment-api
  name: weclapp Shipment API
  description: Outbound shipments / deliveries.
  humanURL: https://www.weclapp.com/api/
  baseURL: https://{tenant}.weclapp.com/webapp/api/v1
  tags:
  - Shipment
  properties:
  - type: OpenAPI
    url: openapi/weclapp-shipment-api-openapi.yml
  - type: Documentation
    url: https://www.weclapp.com/api/
  - type: APIReference
    url: https://www.weclapp.com/api/
  - type: PostmanCollection
    url: collections/weclapp.postman_collection.json
  - type: OpenCollection
    url: collections/weclapp.opencollection.json
common:
- url: https://www.weclapp.com/de/blog/
  type: Blog
- type: Pricing
  url: https://www.weclapp.com/en/pricing/
- type: CapabilityMap
  url: capabilities/weclapp-capability-edges.yml
  name: weclapp Business Capability Map
- type: AgenticAccess
  url: agentic-access/weclapp-agentic-access.yml
- type: DomainSecurity
  url: security/weclapp-domain-security.yml
- type: Authentication
  url: authentication/weclapp-authentication.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/weclapp
- type: Website
  url: https://www.weclapp.com/
- type: Documentation
  url: https://www.weclapp.com/api/
- type: Plans
  url: plans/weclapp-plans-pricing.yml
- type: RateLimits
  url: rate-limits/weclapp-rate-limits.yml
- type: FinOps
  url: finops/weclapp-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

weclapp API — frequently asked questions

Does weclapp have an API?

Yes. APIs.io lists 7 APIs from weclapp, including weclapp Article API, weclapp Customer API and weclapp Purchase Order API, and 4 more.

Is there an OpenAPI specification for the weclapp API?

Yes. APIs.io indexes 7 OpenAPI specifications for weclapp, each linked for download from this page.

How do I authenticate with the weclapp API?

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

How much does the weclapp API cost?

weclapp publishes its prices; its ERP Starter plan is € 39 per month/user* as of 2026-09-20. APIs.io lists 15 pricing plans for weclapp, with each plan's price, limits and inclusions under Pricing on this page.

Is the weclapp API ready for AI agents?

weclapp has a Kin Score of 33.4 out of 100 (thin) and an Agent Readiness score of 19.6 (agent-aware), scored by API Evangelist on 2026-11-06.

Work with this as data

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