Your duty position,
computed and defended.

Nyrex rebuilds every entry you filed, searches the lawful design space for a better landed cost, and produces the evidence file that survives the audit three years later.

Send us your entry summaries See how it works

Classification · Origin · Valuation Preference, exclusions, drawback Decision support — not the filer of record

Position engine — sample session Illustrative. Not customer data.

4,182 SKUs, final assembly split between Vietnam and Mexico. Rebuild what we actually paid in duty last year by authority — then show me what we can lawfully change, and what we can defend.

@ledger Reconstructing 11,904 entry summaries from ACE, broker records and commercial invoices 7501 · reconciled

@classify Testing 3 alternative HTS positions against the CROSS ruling record and GRI order of application 1,207 rulings read

@origin Running tariff-shift and substantial transformation across BOM process steps and supplier geography MX shift satisfied

@defend Assembling citations, BOM evidence and valuation support for every position taken grade a · 173

✓ 214 positions re-solved · 41 escalated to counsel · evidence file ready for review

Ask about a SKU, an entry, or a sourcing scenario… Entry ledger Refund eligibility Move assembly

The problem

Most importers treat duty as an output of the supply chain. It is an optimization problem with a legal constraint set — currently solved one lever at a time, by hand, in a regime that now changes faster than advice can be written.

Worked example — illustrative SKU WH-4402 Wire harness, aluminium content 34% Declared value $412,000

Baseline

Section 301

Section 232 — metals content

Lawfully movable

Baseline surcharge
Applies to the portion no other authority covers
Fixed
Section 301
Follows the origin determination, not the shipping route
Origin-dependent
Section 232
Charged on declared metal content, weighted by value
A bill-of-materials computation
The movable share
Classification, origin design, valuation structure, preference claims
Where the work is

Read that middle segment as an engineer. The duty owed depends on the declared metal content of the product, weighted by value, per SKU, per shipment, against a legal rule. It is done badly by hand and exactly by software — and it is wrong in both directions today.

How it works

Six levers,
solved together.

Classification, country of origin, customs value, program claims, deferral and product design all interact — and each one sits with a different function, advised by a different specialist, on a different cycle. Nyrex searches them jointly and grades what it finds.

Walk through the method

Aerial view of freight containers in a marshalling yard

Entry ledger — FY25Reconciled

ENT-2419-0087 · MX$41,208

ENT-2419-0088 · VN$118,940

ENT-2419-0091 · CN$302,556

Duty by authority4 authorities

› parsed 11,904 CBP 7501 summaries › matched 4,182 SKUs to bills of materials › 1,914 entries missing origin support

The entry ledger

We ingest ACE and broker data, entry summaries, commercial invoices and BOMs, then reconstruct exactly what was paid, on what, under which authority. Most importers cannot answer that today without a two-week fire drill.

Container ship being loaded by gantry cranes at dusk

Position engine · SKU WH-4402Solving

A8544.42.9090 — as filed

B8544.30.0000 — argued

COrigin re-determined MX

Landed cost delta−$1.42 / unit

› GRI 1 then GRI 3(b) applied › 1,207 CROSS rulings weighed › confidence below floor → counsel

The position engine

Given the bill of materials, the process steps and where they happen, supplier geography and commercial structure, Nyrex searches for the lowest defensible landed cost — and returns a confidence and defensibility grade with every position, never a bare number.

Stacked red and blue shipping containers

Defensibility fileReady

Rulings relied onHQ H301619

Case lawCIT 21-00109

Origin evidenceBOM + process

Valuation supportAttached

Reasoning chainReviewable

› built for a CBP auditor, not a board deck › 41 positions routed to outside counsel

The defensibility file

Every position generates its own evidence package: the rulings and case law relied on, the BOM and process evidence behind the origin claim, the valuation documentation, the reasoning. A saving you cannot defend is a deferred penalty with interest.

What we believe

We do not replace your trade counsel. We tell them where to look.

A trade attorney gives a superb answer for the twelve SKUs you asked about. Nyrex gives a good answer for all four thousand — and flags the forty worth an attorney's hour.

Capabilities

What you can
ask it.

The first answer is usually money already lost. After that, it becomes a standing position on every SKU you import — re-solved when the law moves, and modelled before you move a factory.

Ask about your SKUs

Freight containers stacked in a port yard

Leakage & recovery7 findings

Unclaimed USMCA preference$1.81M

Unfiled 232 exclusions$640K

Drawback on re-exports$312K

Content declaration errors$204K

Refund eligibilityUnder review

› every finding carries its own evidence

Leakage and refund recovery

Against your own filings: unclaimed preference, misclassification in both directions, incorrect valuation basis, uncorrected content declarations, unfiled exclusions, drawback left on the table. Recoverable dollars, computed from documents you already have.

Cargo ships berthed along a container pier

Regime change logLive

Authority substituted142 SKUs

232 coverage expanded38 SKUs

Exclusion window openedAction

› positions re-solved within 24h of change › delta and required action surfaced per SKU

Continuous re-solution

A duty position is not a filing. Regime changes are monitored, every affected position is re-evaluated automatically, and you learn what moved for your SKUs that week — with the change log published, not buried in a background job.

Sourcing scenario4,182 SKUs

Assembly in VietnamBaseline

Assembly in MexicoShift satisfied

Assembly in ThailandNot satisfied

› landed cost modelled across the full SKU set › tested against substantial transformation

Sourcing simulation

If final assembly moves from Vietnam to Mexico, what happens to landed cost across all 4,182 SKUs — and does the change actually satisfy substantial transformation, or does it only look like it does? Footprint decisions currently model freight precisely and duty approximately.

What you get

Four commitments that hold
whether or not you save a dollar.

GRADED

Every position is graded

Confidence and defensibility, returned with the number. Anything under the floor is escalated to counsel rather than filed.

CITED

Every position is cited

Grounded in specific rulings, CIT decisions and statutory text — reviewable line by line by a person who will have to argue it.

RE-SOLVED

Every position is re-solved

When the legal basis moves, your affected SKUs are re-evaluated and the required action is surfaced that week, with a published change log.

NO CONTINGENCY

We take no share of your savings

Being paid a percentage of duty minimised buys aggression, and you get audited alone three years later. Fixed diagnostic, fixed subscription.

Founder

Rishul Chanana

Founder · Nyrex

The problem was never
intelligence. It was coverage.

Rishul builds systems that read messy operational documents and turn them into decisions. Nyrex started from one observation about import data: almost everything needed to test whether a company overpaid duty is already sitting in its own entry summaries and bills of materials, in a format nobody reads at scale.

The company is being built with customs counsel and licensed brokers in the loop by design, not as a review step bolted on afterwards. Nyrex is decision support: it narrows four thousand SKUs down to the forty a human should argue about, with the evidence already assembled. It does not render legal opinions and it is not the filer of record.

A saving you cannot defend is not a saving. It is a deferred penalty with interest.

founder@nyrex.site LinkedIn

Trust & data

Restraint is the product.

Entry data, bills of materials and supplier geography are among the most sensitive commercial records a company holds — and the buyer here fears a penalty case far more than they want a saving. So the defaults run conservative: positions below the confidence floor go to counsel rather than into a filing, aggressive-but-arguable is flagged as exactly that, and the word our engine is optimising for is defensible, not minimal.

SOC 2 Type II — in progress Single-tenant isolation Role-based access No training on customer entry data US data residency Audit log on every position Counsel escalation by default

Scope, stated plainly.
Nyrex is decision support for your trade function and your counsel.
We are not a customs broker. We are not the filer of record.
We do not provide legal advice, and we are not paid a share of duty saved.

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Get started

Send us last year's entry summaries.
We'll tell you what you overpaid.

Before you pay us anything. The diagnostic runs on documents you already have, and the finding comes back with its evidence attached.

Start the diagnostic See how it works

Six levers,solved together.