{"id":"customerio-api","name":"Customer.io API","homepage":"https://customer.io","repo_url":"https://github.com/customerio/customerio-python","category":"communication","subcategories":["email","sms","push-notifications","behavioral-messaging"],"tags":["customerio","email","sms","push","behavioral-messaging","automation","rest-api","sdk"],"what_it_does":"Behavioral messaging platform for sending automated email, SMS, push notifications, and in-app messages triggered by user events, with a Track API for event ingestion and Transactional API for on-demand sends.","use_cases":["Triggering event-based email/SMS from agent-detected user actions","Sending transactional messages with dynamic content via API","Managing customer data and attributes programmatically","Creating and updating segments based on behavioral data","A/B testing message variants via API"],"not_for":["High-volume bulk marketing without behavioral triggers","Teams needing deep ecommerce catalog integration (use Klaviyo)","Simple transactional-only email without automation needs"],"best_when":"You need event-driven, multi-channel messaging (email + SMS + push) with sophisticated behavioral segmentation triggered by agent actions.","avoid_when":"You only need simple transactional email or are in ecommerce and need catalog-level personalization.","alternatives":["brevo-api","klaviyo-api","sendgrid-api"],"af_score":80.7,"security_score":null,"reliability_score":null,"package_type":"mcp_server","discovery_source":["github"],"priority":"low","status":"evaluated","version_evaluated":"current","last_evaluated":"2026-03-01T09:50:05.456469+00:00","performance":{"latency_p50_ms":150,"latency_p99_ms":600,"uptime_sla_percent":99.9,"rate_limits":"Track API: 100 requests/second; Transactional: 100/second","data_source":"llm_estimated","measured_on":null}}