Custom MCP servers, skills and plugins for the work your official connector can't finish
You connected the MCP server that came with your CRM, billing or project tool. Then it hit its limits: actions your team relies on are missing, admins can't limit which tools people get, and sign-in errors stall the rollout. We build the missing tools, skills and plugins for Claude and ChatGPT, plus the whole server for any tool with an API but no connector.
The problem
Why can't the official MCP connector finish your team's tasks?
Because the vendor ships one connector for every customer. It gives your assistant the API, not your process.
What it doesn't know
- Which steps run in which order
- What needs sign-off
- What lives in your other tools
Where it breaks in week one
Depending on the tool
- Your reps' logged texts are invisible to it
- Your admin can't choose which tools people get
- Records can't be deleted
- Pipeline stages can't be edited, or invoices can't be approved
- Payments writes run through one generic tool, with no cap on amount or count
The connector came free. It stops right where your real work starts.
What can't official MCP connectors do?
As of October 2026, official MCP connectors for CRM, project, billing and accounting tools handle everyday reads and single-record writes. Depending on the tool, they stop at deleting records, bulk changes, setup changes, cross-object reporting and limits on risky writes. Some popular tools have no merchant-side connector at all.
What your team asks for
Official MCP connectors today
Not available.
The leading CRM connectors have no delete tool, and the accounting connector deletes payroll timesheets only.
What we build
Delete and merge tools that show a preview and wait for a human to confirm
Official MCP connectors today
One record per call.
Several connectors write one record per call, so a 500-record clean-up means 500 separate calls.
What we build
Bulk tools with a dry run, a confirmation step and an audit log
Official MCP connectors today
Read-only or missing.
Pipeline stages and custom field definitions can be read but not edited, and project-tool connectors have no automation or status tools.
What we build
Setup tools scoped to the changes your admins allow
Official MCP connectors today
Limited.
One CRM's query tool has no joins, subqueries or association traversal. Other connectors have no reporting tool at all.
What we build
Reporting tools built on your real questions, across objects and tools
Official MCP connectors today
No admin control.
Your admin can't choose which tools people get. One payments connector runs any write or delete through one generic tool, with confirmation for some actions and no amount or count caps.
What we build
Narrow tools with your business rules checked before every write
Official MCP connectors today
One product each.
Each connector reaches only its own product.
What we build
One server that joins CRM, billing, support and project data
Official MCP connectors today
No server.
No merchant-side server exists for a leading e-commerce platform. A leading help desk offers one only inside ChatGPT, in early access.
What we build
The whole server, built on the vendor's API
We add the missing layer next to the official connector.
Skills and plugins · we build
Your process as steps: what to read, what to check, what to write
No skills or plugins
The assistant guesses your process every time
Official MCP · vendor
Everyday reads and single-record writes
Maintained by the vendor
Free, so we never rebuild it
Custom MCP · we build
Delete and merge, bulk, setup, reporting
Business rules checked before each write
Audit log; runs in your cloud account
Nothing here
No deletes, bulk changes or reports
No rules checked before a write
No audit log
Connector only
Everyday reads and single-record writes, and nothing past the vendor's own tools.
Ask for a clean-up, a setup change, a report across objects or data from another tool, and the request stops here.
With Custom MCP Builds
Two layers added. The rest stays as it is.
Skills and plugins call both servers. The custom server is the only path to deletes, bulk writes, reporting and your other systems, so every one of those actions passes through its rules and audit log.
How does a custom MCP build work?
We learn your tools and your team's requests first, then propose exactly what to build. You get a written gap analysis and a fixed proposal before any build starts.
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30-minute scoping call
Which tools you run, which assistant your team uses, and whether a custom build is the right fix.
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Custom intake form
We send a form tailored to your stack. It covers your tools and plans, the official connectors you've already connected, and the requests the assistant can't handle today.
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Discovery call
With the people who make the requests. We talk to the team members who will use the assistant, and walk through the exact tasks they want it to handle.
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Proposal
A written gap analysis that shows what the official connector can't do for each request, then what we'll build to close the gap: the missing tools (or a whole server, if the tool has an API but no connector), the skills and plugins that use them, the rules they enforce, and a fixed price.
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Build
We build the missing tools, skills and plugins and test them against your team's real requests.
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Hand over
It runs in your own cloud account, with the code in your repository, a step-by-step guide to running it, and one person on your team trained to own it.
What do you get from a custom MCP build?
You get the tools, skills and plugins your official connectors are missing, built for your team's real requests, with your business rules on every write, running in your own account.
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01
A written gap analysis
For each request your team brought, what the official connector can't do and what we'll build to close the gap.
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02
The missing MCP tools
Delete and merge, bulk updates, setup changes, cross-object reporting, or a whole MCP server for any tool that has an API but no official connector.
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03
Skills and plugins that run your process
Which steps run in which order, what needs sign-off, and which tools to call. Built for Claude and ChatGPT.
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04
One view across your stack
A single server that combines CRM, billing, support and project data, so one request can use all of them.
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05
Guardrails on every write
Your business rules are checked first. Deletes and bulk changes show a preview and wait for a human. Payment actions get amount and count limits. Admins choose which tools each team gets.
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06
An audit log of every change
Who asked, what changed, and when.
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Small servers
Only the tools your team needs, so the assistant keeps its context for the work.
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08
Ongoing support subscription (optional)
When a vendor changes its connector or API, we re-run the eval suite on every tool and fix what breaks.
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09
Yours to keep
Plain, documented code in your repository, running in your cloud account, with a step-by-step guide to running, updating and rolling it back, and one person on your team trained to own it. Nothing to rent from us.
Is a custom MCP build right for your team?
It is if your team relies on tools whose official MCP connector is missing actions you need, or on tools that have an API but no MCP connector at all. It isn't if a free connector already covers the work.
It's a fit if
- Your official connector is missing actions your team needs.
- A tool you rely on has an API but no official MCP connector.
- One request needs data from several tools at once.
- You need rules and approvals on what the assistant can change.
- You want the assistant to run recurring jobs on a schedule, using your tools and your rules.
It's not a fit if
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Your official connector already does the job.
Try it first. It's free, and for simple reads and single-record updates it may be enough.
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Your tool has no API.
We build on the vendor's API. Without one, there's nothing to connect to.
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Your vendor's packaged AI already fits your process.
Some platforms bundle their own skills and rules. Check that first.
Custom MCP builds: frequently asked questions
01 / 08
Use it for what it covers: everyday reads and single-record writes. We build next to it and add only what's missing: the tools, skills, plugins and guardrails your team's tasks need.
02 / 08
If it has an API, we build one. The server covers the actions your team needs, with the same rules, approvals and audit log as any other build. If it has no API, there's nothing to build on.
03 / 08
Any tool in your operations stack that has an API: CRM, project management, billing, commerce, accounting and support. One server can combine several of them, so a single request can use data from all of them.
04 / 08
Yes. MCP servers work in both. We test in whichever assistant your team uses, including tasks the assistant runs on a schedule.
05 / 08
Your business rules are checked before every write. Deletes and bulk changes show a preview and wait for a person to confirm. Payment actions get amount and count limits. Admins choose which tools each team gets, and every change is logged.
06 / 08
The tests flag what broke. With the ongoing support subscription, we fix it. Without one, the step-by-step guide shows your team how.
07 / 08
The server runs in your own cloud account. What the assistant reads goes into its context, which means Anthropic or OpenAI under your agreement with them. That's the same as with the official connector.
08 / 08
You get a fixed price in the written proposal, after the scoping call, intake form and discovery call. The gap analysis costs €2,500 and is deducted from the build price if you go ahead. The build is priced on what it covers, because three tools and fifteen tools are different jobs.
Bring the task your official connector couldn't handle.
Book a 30-minute scoping call and bring one task your team wants the assistant to handle. If the official connector already covers it, we'll show you how, and you won't need us. If it doesn't, or your tool has no connector at all, we'll show you what it takes to build.