Penny Engine: small tools for smart agents

Commerce

penny_margin — Unit margin, markup and break-even units. Free, no signup, deterministic.
REST docs

penny_marketplace_profit — Ecommerce net contribution after goods, fees, ads and shipping. Free, no signup, deterministic.
REST docs

penny_target_price — Find minimum price for target gross margin after fees. Free, no signup, deterministic.
REST docs

penny_catalog_audit — Batch-audit up to 50 product records for duplicate SKUs, missing attributes, malformed URLs and estimated net contribution per order. Useful for scheduled ecommerce catalog ingestion and agent product publishing. No external network calls. Free, no signup.
REST docs

Business

penny_cleaning_quote — Commercial cleaning quote by labor and target margin. Free, no signup, deterministic.
REST docs

Marketing

penny_campaign_economics — Customer acquisition cost and break-even click price. Free, no signup, deterministic.
REST docs

penny_subscription_ltv — Simple monthly churn lifetime value estimates. Free, no signup, deterministic.
REST docs

Developer

penny_url_clean — Remove common tracking parameters from HTTP links without fetching. Free, no signup, deterministic.
REST docs

penny_slugify — Turn a short string into a lowercase ASCII URL slug. Free, no signup, deterministic.
REST docs

penny_json_inspect — Parse and inspect bounded JSON input without retaining it. Free, no signup, deterministic.
REST docs

penny_html_extract — Extract structured page title, meta tags, headings and JSON-LD from supplied HTML without browsing or executing scripts. Free, no signup, deterministic.
REST docs

penny_csv_to_json — Transform CSV text into a bounded array of JSON records with quoted cell support. Free, no signup, deterministic.
REST docs