Custom MCP Server

An MCP server that lets any agent safely use your tools, data, and APIs.

PriceFrom $12K
Timeline3–5 weeks
TermsFixed scope

We build one MCP server that lets any agent use your tools, data, and APIs — safely. Named tools with typed schemas, auth and permissions, observability, and integration tests, in TypeScript — plus a private deploy or registry submission, across three to five weeks.

MCP is the universal protocol: one server works across Claude Code, Codex, Cursor, and any MCP client. Build it once and the investment compounds instead of locking you in.

Week by week
01Week 1

Surface design

We decide exactly what to expose — the tools, resources, and boundaries — so agents get power without the footguns.

02Weeks 2–3

Build the tools

TypeScript MCP server, named tools with typed schemas, auth and permissions, and structured error handling.

03Week 4

Harden + test

Observability, integration tests against real calls, and rate and permission scoping.

04Week 5

Ship

Private deploy or registry submission, plus a runbook — one server, every MCP client.

Scope

What the engagement covers

Surface design

What we build
  • What to expose (and not)
  • Tools vs resources
  • Blast-radius boundaries
What it unlocks

Agents get exactly the power they need — no accidental 'delete production' tool.

What you receive

A working server, delivered typed and tested — not a proof of concept.

The tool schema an agent reads, the surface it exposes, the permissions around it, and the clients it works across. A sample is shown; yours wraps your stack.

A tool schema

The typed contract an agent reads to call your tool correctly the first time.

tools/create-invoice.tsSample
1// a named tool an agent calls correctly
2export const createInvoice = tool({
3 description: 'Create a draft invoice',
4 input: {
5 customerId: z.string(),
6 amount: z.number().positive(),
7 },
8 access: 'write · scoped',
9 handler: createInvoiceImpl,
10})

The tool surface

Named, scoped actions — each authenticated and audited.

mcp · toolsSample
create_invoicewrite · scoped
get_customerread
list_ordersread
refundwrite · approval
search_docsread

Auth + tests

Every tool authenticated, scoped, and covered by real-call tests.

ci · mcp-serverSample
auth + scopeper-tool
input validationtyped
integration tests42 passing
rate limitsenforced
audit logon
5 pass · 0 warn · 0 fail

One server, every client

The same server works across Claude Code, Codex, Cursor, and any MCP client.

mcp · reachSample
MCP clients
All
Tools exposed
5
P95 latency
80ms
Auth failures
0
PlusPrivate deploy or registry submission · a runbook · 30 days of async Q&A.
Fit

Built for

Platform team

Exposing internal tools to agents

A safe, typed, audited surface over your stack — instead of hand-rolling function-calling per vendor.

API owner

Making a proprietary API agent-accessible

Your API, wrapped as MCP tools any agent can use correctly and safely.

Eng lead

Standardizing agent access

One protocol across every client, so tool access isn't rebuilt for each new agent.

FAQ

Questions, answered

Common questions

Start here

Book a free scoping call.

We scope the exact number with you, and sign a mutual NDA before any code or data is shared.

Starts at$12K
Newsletter

One letter, every week. Working systems — not hot takes.

Build logs, agentic engineering decisions, agent failures, evals, and what survives real users. Sent weekly, never more.

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