Friendbuy Referral and Loyalty API
Friendbuy referral and loyalty REST API for DTC e-commerce brands to build refer-a-friend and loyalty programs with Shopify-native integration, fraud detection, reward fulfillment, and analytics for customer acquisition and retention at scale. Enables AI agents to manage referral campaign creation for DTC word-of-mouth automation, handle advocate enrollment and referral link generation for acquisition automation, access referral conversion tracking for attribution automation, retrieve reward distribution and coupon fulfillment for incentive automation, manage loyalty points accrual and redemption for DTC retention automation, handle fraud detection and referral validation for program protection automation, access referral analytics and attribution reporting for optimization automation, retrieve A/B test configuration for referral variant testing automation, manage customer segment targeting for personalized referral automation, and integrate Friendbuy with Shopify, Klaviyo, Attentive, and DTC marketing tools for end-to-end referral and loyalty automation.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
DTC referral. GDPR, SOC2. API keys. US. Customer referral and behavioral data.
⚡ Reliability
Best When
A DTC e-commerce brand on Shopify wanting AI agents to automate referral program management, advocate enrollment, loyalty points accrual, and reward fulfillment through Friendbuy's DTC-native referral and loyalty platform.
Avoid When
WIDGET-FIRST ARCHITECTURE: Friendbuy is primarily designed around client-side widget (JavaScript widget on storefront); automated server-side API integration handles less functionality than widget flow; automated pure API integration without widget may miss advocate sharing experience optimization. SHOPIFY ORDER WEBHOOK FOR CONVERSION: Friendbuy referral conversion tracking typically uses Shopify order webhook; automated non-Shopify checkout must use server-side conversion API; automated Shopify-only assumptions for non-Shopify platforms creates conversion tracking gap. REWARD TYPE CONFIGURATION PRECEDES FULFILLMENT: Friendbuy reward types (discount code, store credit, gift card) must be configured in dashboard; automated reward fulfillment via API requires pre-configured reward type; automated ad-hoc reward type via API only creates unsupported operation error. SANDBOX ENVIRONMENT LIMITATIONS: Friendbuy sandbox environment has reduced feature set vs production; automated integration testing in sandbox may not replicate all production behaviors; automated sandbox-only testing creates production behavior surprises at launch.
Use Cases
- • Running Shopify referral programs from DTC customer acquisition agents
- • Tracking referral conversions from attribution and reward fulfillment agents
- • Managing loyalty points for DTC brands from retention automation agents
- • Detecting referral fraud from program protection agents
Not For
- • Enterprise omnichannel programs (use Extole or Antavo for large enterprise)
- • B2B SaaS affiliate programs (use Rewardful or PartnerStack for SaaS)
- • Complex rule-based promotions (use Talon.One for enterprise rule engines)
Interface
Authentication
Friendbuy uses API key (secret key + publishable key pattern) for authentication. REST API with JSON. Los Angeles, CA HQ. Founded 2012 by Dave Geisberg. Backed by Upfront Ventures, Softbank ($17M raised). Clients: Netflix, Intuit, Dollar Shave Club. Products: Refer-a-friend, loyalty programs, Shopify app, fraud detection, analytics. GDPR. SOC2. Shopify Plus Partner. Serves DTC brands. Competes with Smile.io and LoyaltyLion for DTC referral.
Pricing
Los Angeles CA. Upfront Ventures backed. Monthly subscription by order volume. Demo required.
Agent Metadata
Known Gotchas
- ⚠ SECRET KEY vs PUBLISHABLE KEY: Friendbuy uses secret key (server-side) and publishable key (client-side widget); automated server API must use secret key; automated publishable key server-side use creates unauthorized for conversion and reward operations
- ⚠ CONVERSION EVENT MUST INCLUDE REFERRAL CODE: Friendbuy server-side conversion tracking requires referral code from original referral link; automated conversion API must pass referral_code attribute; automated conversion without referral_code creates conversion recorded but not attributed to referrer
- ⚠ REWARD PENDING STATE BEFORE FULFILLMENT: Friendbuy rewards move through pending → approved → fulfilled states; automated reward fulfillment must poll for approved status; automated immediate fulfillment trigger after conversion creates early fulfillment before approval processing
- ⚠ CUSTOMER DEDUPLICATION BY EMAIL: Friendbuy deduplicates customers by email; automated customer creation with existing email updates existing record; automated new customer creation with duplicate email creates silent update instead of error
- ⚠ WEBHOOK RETRY ON FAILURE: Friendbuy retries webhooks on failure up to 5 times with backoff; automated webhook processor must return 200 quickly or implement idempotency; automated slow webhook creates timeout and duplicate webhook delivery on retry
Alternatives
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Scores are editorial opinions as of 2026-03-07.