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Pillar AI Service

MCP Server Development Services & Model Context Protocol Tools

Reviewed by Umar Abbas • Founder & Principal AI Architect

Last reviewed: 14 August 2026

Standardizing model-to-tool connectivity demands a rigorous protocol engineering lifecycle. We design, benchmark, and deploy custom Model Context Protocol (MCP) servers with strict JSON-RPC schema contracts, authentication middleware, and low-latency transport layers.

Typical Build3 - 6 Weeks
StandardModel Context Protocol
AuthOAuth + Scopes
PrincipleLeast Privilege
Delivery Lifecycle

How we deliver an MCP server

Run under our core engineering process. We start with the tools that unblock the most agent work, and design permissions before writing them.

1. Pick the tools and their limits

Decide what agents should be trusted to read and do, and set the least-privilege scope for each.

2. Design clear schemas

Write tool and resource schemas a model can call correctly, with validation on every input.

3. Add auth, limits, and logs

Wire OAuth, rate limiting, and full call logging, and gate any high-impact action behind approval.

4. Test, host, and hand over

Test against the clients you use, deploy in your infrastructure, and hand over runbooks and monitoring.

What We Build

One server, many agents, one place to audit

The value of the Model Context Protocol is reuse. Build a tool once, and every compatible agent can use it, with access controlled and logged in a single place.

Tool & resource design

Clear schemas a model can call correctly, scoped to the minimum each tool needs.

Auth & permissions

OAuth with least-privilege scopes, so an agent gets only the access its job requires.

Rate limiting & logging

Every call limited and logged, so misuse is capped and every action is traceable.

Testing & hosting

Each tool tested against real clients, then deployed in your infrastructure with monitoring.

Agent AAgent BAgent CMCPServerauth · logDatabaseCRM APIFiles
Protocol Stack

Standards & transports we build on

Model Context Protocol JSON-RPC OAuth Streamable HTTP stdio transport LangGraph

Read our deep dive on the Model Context Protocol and using it in LangGraph agents.

Reference Architecture

A single call, checked at every step

An agent asks for a tool. The server authenticates it, checks the scope, runs the tool against the real system, logs the call, and returns a typed result. Every step is a place to enforce a rule.

Agenttool requestAuth + ScopeOAuthValidateinput schemaRun Toolreal systemLog + Returntyped result

The same checks run for every tool and every agent, because they live in the server, not in each agent’s code. That is what makes the access auditable.

Where This Applies

Industries with many systems and strict access

MCP servers fit organizations with several internal systems and a need to control and audit exactly what an agent can touch.

Banking & Financial Services →

Tightly scoped tools with full logging over core systems, including legacy mainframes.

Fintech →

Reusable tools shared across several agents, controlled from one server.

All industries →

See every sector where we build agent tooling.

Honest Failure Modes

What goes wrong on MCP server projects

1. Exposing too much

The failure: Broad tools are exposed for convenience, and an agent can now do more than intended.

Our prevention: Least-privilege scope per tool, decided before the schema is written.

2. Vague tool schemas

The failure: Unclear tool definitions make the model call them wrong, so results are unreliable.

Our prevention: Precise schemas with descriptions and validation, tested against real clients.

3. No logging or limits

The failure: Calls are neither capped nor recorded, so misuse is invisible and unbounded.

Our prevention: Rate limits and full call logging from the first tool.

4. Treated as a side project

The failure: The server sits between agents and real systems but has no owner or monitoring.

Our prevention: Operate it like a production service, with runbooks and alerting.

Is This the Right Page?

Where this service starts and stops

For the protocol explained rather than built, see our MCP technology page. For connecting existing SaaS and ERP systems generally, see AI integration. For hardening what agents can do with these tools, see AI security. This page is the build service for MCP servers.

A tool is a permission

Every tool you expose is something an agent can now do. Design the scope before the schema, because the server is a security boundary, not just a connector.

Buyer FAQ

Frequently asked questions

What is an MCP server?↓

An MCP server exposes tools and data to AI agents over the Model Context Protocol, a shared standard for how models call external systems. Instead of writing a custom integration for each agent, you build one MCP server that any compatible agent can use. It is the difference between a universal port and a drawer of one-off adapters.

Why build an MCP server instead of direct API calls?↓

Direct calls tie each agent to each system, so every new agent repeats the work and every change touches many places. An MCP server centralizes the tools, their schemas, auth, and logging in one place. You add a tool once and every agent gains it, and you audit access in one place rather than across scattered code.

How do you secure an MCP server?↓

With OAuth authentication, least-privilege scopes per tool, rate limiting, and full logging of every call. Because an MCP server can let an agent act on real systems, we treat it as a security boundary: each tool validates its own inputs, and high-impact actions require approval. We cover this alongside our AI security work, not as an afterthought.

What can we expose through MCP?↓

Read tools for data, such as querying a database or fetching a document, and action tools that do something, such as creating a ticket or updating a record. We scope each to the minimum it needs. The design question is not what is possible but what an agent should be trusted to do, and we make that boundary explicit.

Does MCP work with our existing agents and models?↓

MCP is model-agnostic and supported across a growing set of agent frameworks and clients. A well-built server works with agents on different models without change, which is the point of a standard. We test against the clients you use and design the tools so they are clear for a model to call correctly.

Can you host and operate the MCP server for us?↓

Yes. We can deploy it in your infrastructure, wire monitoring and rate limits, and hand over runbooks, or operate it under a retainer. Because it sits between agents and your real systems, it needs the same operational care as any production service: logging, alerting, and a clear owner.

How is this different from general AI integration?↓

AI integration is the broad work of connecting AI to your systems, by whatever means fits. MCP server development is the specific build of a protocol server so agents can use those systems as tools. If you want a general connection between an app and an API, that is integration. If you want reusable, audited tools for agents, that is an MCP server.

How long does an MCP server build take?↓

A focused server exposing a handful of tools is a matter of a few weeks, including auth, testing, and hosting. The time goes into designing clear tool schemas and safe permissions, not the transport, which the protocol handles. We start with the tools that unblock the most agent work and add more once the pattern is proven.

Give your agents safe, reusable tools

Book a 45-minute session. We will map which systems your agents need and how to expose them as scoped, audited MCP tools.

Book an MCP Design Session

Production Proof

Case studies

Banking Case

Mainframe Access as Tools

Legacy systems exposed as scoped, logged tools an agent could call safely.

Read Reference Architecture →
All Work

More production systems

Browse the full set of agent and tooling builds with their design decisions.

View Case Studies →