MemberPress Developer Tools exposes REST endpoints over mepr_members, mepr_transactions, mepr_subscriptions, and the memberpressproduct CPT. It also broadcasts webhooks for events like mepr-event-transaction-completed, mepr-event-subscription-created, and mepr-event-member-signup. Those payloads are written to the same custom tables the core plugin maintains, plus the WordPress options and postmeta the API surfaces.

The default MemberPress admin focuses on per-row screens. Members, Transactions, and Subscriptions each get their own list, and the Reports module aggregates the headline numbers. None of that gives a developer or operator a visual sense of API traffic, webhook fan-out, or which integrations are pulling which slices of member data. Yet the activity is right there in the same tables that back the REST responses.

SleekView Charts reads those tables directly. A Number card pins down active members the API can see. A Pie splits transactions by status (complete, pending, refunded, failed) so webhook consumers know what shape of payload is flowing. A Bar ranks membership products by member count for integration prioritisation. An Area trends transaction volume over time so a noisy webhook spike maps back to real signups.

MemberPress Developer Tools makes the membership data accessible over REST and webhooks, which solves the integration problem but creates a new operational one. Every webhook consumer is now downstream of the same mepr_transactions and mepr_subscriptions tables, and a small shape change (a spike in failed transactions, a new membership product driving most signups, a gateway-side retry storm) ripples out to every connected system. Watching that shape on a dashboard, not in a log file, is the difference between proactive integration ownership and reactive firefighting.

A growing failed-transaction slice on the pie tells the integrations team to brief downstream consumers before they alarm. A flat area trend on signups during a launch surfaces a regression while there is still time to fix it. Same custom tables, the same ones Developer Tools serialises, organised as a cockpit the engineering team can actually read.