What an MCP server costs in 2026: build, run and maintenance
Price ranges for building an MCP server, what drives the bill up, and the running cost everyone forgets to count.
The question always arrives at the same moment: someone decided an MCP server is needed, and nobody knows what that costs. Here are honest ranges, what moves them, and the running cost everyone forgets.
Three build tiers
A simple, read-only server. Five to ten tools, API key authentication, no state between calls. The case for a product that wants its data queryable. A few days of work.
A transactional single-tenant server. Read and write, OAuth, a few multi-step workflows, a write log. One to two weeks.
A full multi-tenant server. OAuth with per-client revocation, quotas, isolation, long-running jobs, an in-chat interface, ready for a directory. Three to six weeks.
At my posted rates, building a server runs €4,500 to €7,500 depending on the tier. A migration to the current revision is a €2,400 sprint. A prior audit, €950.
What actually drives the bill up
It is never the number of tools. It is these five things.
Multi-tenant authentication. Going from an API key to a full OAuth chain, with per-client revocation and scopes that mean something, often doubles the work.
State between calls. Now that the protocol is stateless, any multi-step workflow needs handles, storage, TTLs and owner checks. That work is invisible from the outside.
The tool surface. If your API is the starting point, it has to be translated into intents rather than endpoints. That is design work, and it decides the final quality.
Directory conformance. Accurate privacy policy, hardening, revocation, presentation. A project in its own right, quoted separately at €1,200 with me.
Existing production. A server already live with users costs more to change than a new one, because you need a compatibility strategy and a rollback window.
The running cost people forget
The build is a one-off. The rest recurs, and that is where budgets go wrong.
Hosting. Usually modest, especially now the protocol is stateless: no sticky sessions, no shared store, plain round-robin is enough.
Inference, if you run any. This is the line that surprises. With sampling deprecated, a server that needs a model calls a provider itself and pays the bill. What the user paid for through their host application lands on you. Check this before committing to a sale price.
Tracking the protocol. A major revision just shipped, and there will be others, even though the new governance rules aim to avoid ruptures of that scale. Budget an hour a quarter if you automate, more if not. Compliance monitoring is €290 a month if you would rather outsource it.
Support. An MCP server generates a new ticket type: "the agent did not do what I wanted". That is neither a bug nor user error, it is a tool design problem, and it gets fixed by iteration.
Build or have it built
The honest question is not price, it is opportunity cost.
A good developer on your team will ship a decent server. It will take longer than planned, mostly on the parts they have not met yet: the OAuth chain, tool surface design, and conformance with a revision that is less than three weeks old.
Outsourcing makes sense if that time is worth more elsewhere, or if you would rather not learn the protocol at your own expense. It does not make sense if this is going to be a core asset you evolve monthly: in that case the competence belongs in-house, and the right engagement is an audit plus support, not a turnkey build.
I say this because it is true, not because it suits me.
FAQ
Fixed price or time and materials?
Fixed price, if scope is set by a prior audit. Without an audit, any quote is a guess, mine included.
What does migrating to 2026-07-28 cost?
€2,400 for a sprint on a normal-sized server. The real cost depends on how much hidden state there is, which is exactly what the audit measures.
Is it worth it for a small SaaS?
It comes down to one thing: do your users already work inside an AI client. If yes, an MCP server removes a round trip from their journey. If not, you are building for a usage that does not exist for them yet.
Find out what it costs in your case
Audit at €950, or a free written diagnostic within 24 business hours if you want to know where you stand first. Posted fixed prices, no open-ended quotes.
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