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Open-Policy Exchange
~6 min to deploy
eBay Listing Margin Gate
Folds eBay final-value fees and promoted-listing rates into the margin check before a listing or price change goes live.
For: eBay sellers running repricers or automated listing tools
SOC 2 CC8.1ISO 27001 A.8.34Listing evidence trail
What it enforces
Fee-adjusted margin floor
Blocks a listing price whose margin, after final-value and promoted-listing fees, is under the floor.
Repricer floor breach
Blocks a repricer update that would push the price below the encoded floor.
Promotion-stacking check
Escalates a listing that combines a markdown with a promoted-listing rate above the ceiling.
ebay-listing-margin-gate.yaml
# eBay Listing Margin Gate
# Fork: set your own category fee rate and floor.
apiVersion: decionis.dev/v1
kind: PolicyPack
metadata:
name: ebay-listing-margin-gate
surface: ebay
workflow_key: listing_price_change
standards: [SOC2-CC8.1, ISO27001-A.8.34]
defaults:
mode: shadow
emit_dossier: true
margin_floor_pct: 10
rules:
- name: fee_adjusted_margin_floor
when: "action == 'listing.publish'"
decision: |
BLOCK IF (price - item.cost_basis - fees.final_value - fees.promoted) / price < margin_floor_pct / 100
ALLOW OTHERWISE
reason_code: fee_adjusted_margin_below_floor
- name: repricer_floor_breach
when: "action == 'listing.reprice' AND actor.type == 'automation'"
decision: |
BLOCK IF new_price < listing.encoded_price_floor
ALLOW OTHERWISE
reason_code: repricer_below_encoded_floor
- name: promotion_stacking_check
when: "action == 'listing.publish'"
decision: |
ESCALATE IF markdown_pct > 0 AND fees.promoted_rate_pct > 8
ALLOW OTHERWISE
reason_code: markdown_and_promoted_rate_stacked
Fork it, change the thresholds to match your environment, and deploy in shadow mode first — it defaults to listen-only so nothing in your live pipeline changes.
How to install it
Follow the install path for this surface, then paste the forked YAML as your policy config.