Fuel surcharge labWorking prototype · 03API reference ↗
UNDERSTAND THE PROCESS

One reference.
Every step explained.

Follow a fuel reference through a real published lookup table into a stored surcharge result.

Your demonstration

Workspaces keep each walkthrough separate.

Follow a calculation

01 / SOURCE INPUT

Prepare a reference

Manually supplied demo observations. No live retrieval.

02 / LOOKUP TABLE

The applicable version

Selection follows the surcharge effective period, regardless of when the calculation runs.

Create a workspace to inspect demo versions.

03 / CALCULATION

A visible decision

The API prepares the reference, selects a table version, matches its band and records the result.

Identical retries reuse the stored result. Unresolved rules block lookup rather than invent a surcharge.

04 / DATED RESULT

Ready when you are

A completed run will appear here with its effective period and revision.

Inspect the explanation ↓

Lookup tables and versions

Published baseline copies retain actual bands. New drafts and their applicability are demo changes. The inspection date changes lifecycle labels only.

PREPARE → CHECK → PUBLISH

Prepare the next lookup table

Reuse existing rules, or bring in a CSV. Save a draft, review its differences and preview the effect before publishing it for an effective period.

Demo calculation history

Only results computed in this workspace.

No workspace selected.

Published rate history

Actual imported publications. These are not claimed as reproduced calculations.

Loading published rates…

Regional and local methods

Compare shared resources with local sources, units and reference windows. Shared table assignments are explicit demo choices.

Published table evidence