Financial API rate limiting protection prevents malicious attacks by controlling the number of requests a client can make within a specific time frame. This mechanism ensures that legitimate users have uninterrupted access while blocking or slowing down excessive requests from attackers, such as those attempting brute force attacks, DDoS (Distributed Denial of Service), or scraping sensitive data.
For example, if an API allows 100 requests per minute per user, any client exceeding this limit will receive an error response (e.g., HTTP 429 Too Many Requests). This throttling discourages attackers from overwhelming the server, as their requests are either delayed or rejected.
In the financial sector, where APIs handle sensitive transactions, rate limiting is critical. For instance, a payment gateway API might restrict each merchant to 500 transactions per hour to prevent fraud. If an attacker tries to flood the API with fake transactions, the rate limiter will block them after the threshold is reached.
Tencent Cloud API Gateway provides built-in rate limiting features, allowing developers to set custom request quotas and enforce them dynamically. It also integrates with Tencent Cloud Anti-DDoS services to further mitigate large-scale attacks, ensuring high availability and security for financial APIs.