Technical PoCMarketplace
Exchange optimisationFinding the swap
Finding the swap
that simple search misses.
This working proof of concept ranks directed item compatibility, builds a graph of acceptable exchanges, and identifies two- to five-party cycles in which every participant receives an item they requested.
Ranked exchange plans
From bilateral swaps to coordinated cycles
Each arrow means the owner of the item on the left is willing to receive the next item.
BenStrategy board game bundle→
EvaAcoustic travel guitar
↺ closes the cycle
LeoCompact reading chair→
AbbasOlympus film camera→
SaraStudio headphones
↺ closes the cycle
AmirFilter coffee maker→
NoraCity bicycle→
OskarsFantasy book collection→
MilaLarge indoor monstera
↺ closes the cycle
Explainable scoring
Every score can be inspected
Example direction: Leo offers Compact reading chair and evaluates Olympus film camera. Hard constraints are applied before a weighted 100-point score.
Matched requested signals: Photography, camera.
Estimated value €120 is inside the preferred €95–€150 band.
Very good meets the minimum condition of Good.
Compatible through local exchange at 1.05 km.
Uses normalized verification, completion and response signals from the item owner.
Listing age is 6 days.
Development status
What exists now and what comes next
Marketplace workflow
Accounts, listings, search, saved items, bilateral offers, private trade chat, completion, reviews, reports and administration.
Exchange engine
Hard-constraint filtering, explainable directed ranking, graph construction, unique cycle detection, fairness adjustment and deterministic tests.
Production optimisation
Consented preference learning, fraud-resistant value confidence, privacy controls, constrained solver benchmarks and monitored marketplace integration.