01 · Tenant
The host is the tenant, not weclapp.com
Every call goes to https://{tenant}.weclapp.com. A token from one tenant does not answer for another.
For sales teams in production companies on weclapp
A weclapp MCP server reads quotations, opportunities and customers from the tenant's own REST API. weclapp does not ship an MCP server as of 6 October 2026. Version 2 documents accepting a quotation as a separate call. Pexon leaves that call out. The token is a seller, not an administrator.
What we build
Built on what weclapp SE documents: customers and parties, opportunities, quotations, sales orders, sales invoices. Backends named below are documented resources; "confirmed in blueprint" means the vendor documentation sits behind a login and the resource is checked against your release first.
# weclapp-mcp-server: tool manifest, draft for blueprint week 1
# Every tool runs as the person asking. Nothing is written without a person confirming.
tools:
list_open_quotations: # customer -> quotations that are not accepted
backend: GET /quotation, v1 or v2 as the tenant runs
mode: read
get_quotation: # id -> status, date, customer, items
backend: GET /quotation/id/{id}
mode: read
list_opportunities: # filter -> open opportunities
backend: GET /opportunity on v2, confirmed in blueprint on v1
mode: read
get_party: # id -> the customer or contact
backend: GET /party/id/{id} on v2, or /customer on v1
mode: read
draft_quotation_note: # quotation, text -> a note a person saves
backend: not posted by the agent
mode: propose
audit: every call logged with user, tool, arguments and the weclapp responseThe manifest is the contract. A question that needs an operation not on it gets a new line and a review, not a wider permission.
Checked 6 October 2026
| What we found | |
|---|---|
| Interfaces | weclapp API v1 (REST/JSON, docs public) · weclapp API v2 (REST/JSON, docs public) |
| Authentication | The tenant issues an API token. The public changelog lists the resources and not the header name on the page we read, so the blueprint confirms the header on your tenant rather than copying one from a third-party client. |
| Vendor MCP server | No vendor server. No weclapp MCP server is described on weclapp.com/api or the v2 changelog read on 6 October 2026. |
| Vendor AI assistant | None found. |
| Other connectors | None found. |
weclapp SE (DE). Cloud-first SMEs in trade and services. The DACH overview of 14 May 2026 lists weclapp at more than 12,000 customers, part of 3U Holding, in Marburg, with CRM and ERP in one suite.
Why weclapp is hard for agents
01 · Tenant
Every call goes to https://{tenant}.weclapp.com. A token from one tenant does not answer for another.
02 · Version
v2 moves customers, contacts, leads and suppliers onto /party. A tool built on /customer fails on a tenant that has moved, and the other way around.
03 · Quote
v2 documents POST /quotation/id/{id}/accept and other price actions. Those stay out of the tool list. Reading the quotation is the sales question.
04 · Token
A tenant token can see every record that token's user can see. If that user is an administrator, the assistant is an administrator. The blueprint uses a user with the seller's rights.
One interface per row
01
REST/JSON. Documentation is public. per tenant at https://{tenant}.weclapp.com/webapp/api/v1. Documented resources include customer, quotation, salesOrder and salesInvoice. Interactive docs are at weclapp.com/api
02
REST/JSON. Documentation is public. the v2 changelog collapses customer, contact, lead and supplier into /party, and documents /opportunity and /quotation including linkQuotation
weclapp holds the records. An assistant without a governed way in answers from whatever someone pasted into the chat. The connector is the governed way in: named operations, the person's own permissions, every call logged.
When this is the wrong page
If the question is the ERP stock behind the quote, say so. weclapp is both. This page is the sales question: open quotations and opportunities. Warehouse movements are a different tool list.
Two weeks, €4,900 fixed price. Week one agrees the tool list with your weclapp owners and checks every backend against your release and licence. Week two tests whether a person's own weclapp permissions reach through the connector. You keep the manifest and a costed build plan, whoever builds it. All prices are net and exclude VAT.
What we need from you: a named weclapp administrator, a test or sandbox system we may call, and one business owner who can say which questions the assistant should answer first. The first production connector is usually a use-case pilot from €15,000; it runs in your environment, and the code is yours.
No weclapp MCP server is described on weclapp.com/api or the v2 changelog read on 6 October 2026. This page describes what we add around that fact: a signed tool list and a test that the asking user only sees their own records.
Not on the list we sign. The blueprint starts read-only. A draft the person saves in the CRM is the only write, and only after that is agreed.
Only where the CRM would already show both of them the same records. Calls run as the person who asked. The blueprint tests that with two users before anything is called production.
The two-week Readiness Blueprint is fixed at €4,900: the tool list, a check against your tenant, and a test that permissions survive the round trip. A production connector is usually a use-case pilot from €15,000. Prices are net, excluding VAT.
Next step
Thirty minutes with the engineer who would build the connector, with your weclapp administrator in the room if you like.