Sentry Rate Limits & Quota Optimization

Overview

Manage Sentry rate limits, sampling strategies, and quota usage to control costs without losing visibility into critical errors. Covers client-side sampling, beforeSend filtering, server-side inbound filters, per-key rate limits, spike protection, and the usage stats API.

Prerequisites

• Sentry account with a project DSN configured
• SENTRY_AUTH_TOKEN with org:read and project:write scopes (Settings > Auth Tokens)
• SENTRY_ORG and SENTRY_PROJECT slugs known
• SDK installed: @sentry/node (npm) or sentry-sdk (pip)
• Current event volume visible at sentry.io/stats/

Instructions

Step 1 — Understand Rate Limit Behavior

When your project exceeds its quota, Sentry returns 429 Too Many Requests with a Retry-After header. The SDK automatically stops sending events until the cooldown expires. Events generated during this window are permanently lost — there is no replay mechanism.