Partner Overview
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Custom API Partners

When nothing off the shelf fits.

Some integrations have no connector because the system is bespoke, the domain is unusual, or the client built it themselves. That is normal work for us.

The premise
We do not run a Custom API practice. That is exactly why we are safe to bring in.

You own the client, the roadmap, and the platform work. We build the technical layer between Custom API and everything it has to agree with — and we have no interest in your platform business, your retainer, or your account.

Since 1997 we have engineered this connective work underneath other firms’ client relationships, across payments, travel, telecom, billing, financial services, healthcare, and manufacturing.

Where we plug in

The interfaces we work through, and why we choose one over another.

API design & versioning

Contracts that can change without breaking the consumers already using them.

Authentication & authorization

OAuth, mTLS, signed requests — appropriate to who is calling and from where.

Idempotency & reliability

Retries, ordering and exactly-once semantics where the domain demands them.

Documentation & developer experience

An API a partner’s own developers can adopt without a call.

The four requests we get most

Bespoke system API
Wrapping a bespoke or in-house system in a supportable API.
Public API design
Designing an API a client will expose to their own customers or partners.
Undocumented rescue
Replacing an undocumented integration written by someone who has left.
Beyond direct database
Building the integration layer for a product that has outgrown direct database access.
However you need it delivered

Three ways partners use us on Custom API work.

A scoped work package
A defined integration with acceptance criteria, quoted fixed-scope. The usual way a partner tests whether we behave the way this page says we do.
Embedded in your team
Named engineers inside your tools, on your domain, in your stand-ups. The client sees your firm.
Architecture only
Senior architecture ownership up to ten days a month, where your team can build but wants the decisions defended.
Bring us the Custom API work you would rather not hire for.