For the complete documentation index, see llms.txt.
11 endpoints

Marketing API

Same bearer token, same credit pool, same JSON envelope as every other endpoint — drop them into apps, sites, workflows, or agents without rebuilding formulas, validation, or docs.

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Advertising
CTR Calculatorctr-calculator
Calculate click-through rate, required clicks for a target CTR, or bulk campaign CTR.
1cr · v2026-04-22
Email
Email Open Rate Calculatoremail-open-rate-calculator
Calculate email delivery rate and open rate from campaign counts.
1cr · v2026-04-22
Unsubscribe Rate Calculatorunsubscribe-rate-calculator
Calculate campaign unsubscribe rate and subscriber-list loss rate.
1cr · v2026-04-22
Funnels
Conversion Rate Calculatorconversion-rate-calculator
Calculate conversion rate from visitors and conversions.
1cr · v2026-04-22
ROI
Social Media ROI Calculatorsocial-media-roi-calculator
Calculate social media campaign ROI, ROAS, conversion rate, and unit costs.
2cr · v2026-04-22
Retention
Churn Rate Calculatorchurn-rate-calculator
Calculate churn, retention, ending customers, and net customer growth.
1cr · v2026-04-22
SaaS Metrics
ARPU Calculatorarpu-calculator
Calculate ARPU for a period plus monthly and annualized ARPU.
1cr · v2026-04-22
Surveys
Net Promoter Score Calculatornet-promoter-score-calculator
Calculate NPS from promoter, passive, and detractor counts.
1cr · v2026-04-22
Unit Costs
Cost Per Lead Calculatorcost-per-lead-calculator
Calculate cost per lead and optional funnel metrics.
1cr · v2026-04-22
Unit Economics
Customer Acquisition Cost Calculatorcustomer-acquisition-cost-calculator
Calculate CAC from marketing spend, sales spend, and new customers.
1cr · v2026-04-22
Customer Lifetime Value Calculatorcustomer-lifetime-value-calculator
Estimate LTV from order value, purchase frequency, gross margin, and lifespan.
1cr · v2026-04-22