GraphQL API Gateway with Per-Client Rate Limiting for Multi-Tenant SaaS Applications
Multi-tenant SaaS exposing GraphQL APIs need per-client rate limiting that understands query complexity. A heavy nested query from one client can consume 100x more resources than a simple query but counts as one request. A GraphQL-aware API gateway with query complexity-based rate limiting would prevent the 'noisy neighbor' problem that causes service degradation for all tenants.
Problem Statement
A SaaS company's GraphQL API serves 200 clients. Client A sends a deeply nested query that fetches 50K database rows. This query takes 30 seconds and consumes 90% of the API server's resources, causing timeouts for all other clients. The rate limiter doesn't catch it because Client A is under their request-per-minute limit. The problem recurs every time Client A runs their integration.
The Idea
A GraphQL-aware API gateway with query-complexity-based rate limiting for multi-tenant SaaS, so one client's expensive nested query doesn't degrade performance for all other clients.
Why Now
GraphQL APIs are standard for SaaS products but rate limiting is still based on request count, not query complexity. A client can send one deeply nested query that consumes more resources than 100 simple queries, but it counts as 1 request. As SaaS companies scale to hundreds of API clients, complexity-based rate limiting becomes essential to prevent service degradation.
Target User
Backend engineers at SaaS companies exposing GraphQL APIs to external clients
Target Market
SaaS companies with GraphQL APIs serving multiple clients or tenants
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