Rate Limiting Architecture

Implementation Architecture

The API implements a distributed token bucket algorithm for precise throughput control. Each IP address receives an isolated bucket with the following constraints:

Bucket Capacity: 500 tokens
Refill Rate: 500 tokens/second
Time Resolution: Millisecond precision

Rate Control Headers

The system implements RFC 6585 compliant rate control headers:

Header	Type	Description
`X-RateLimit-Limit`	Integer	Bucket capacity
`X-RateLimit-Remaining`	Integer	Current token count
`X-RateLimit-Reset`	Unix Timestamp	Next refill timestamp

Implementation example:

X-RateLimit-Limit: 500
X-RateLimit-Remaining: 499
X-RateLimit-Reset: 1702544876

Throughput Control Response

When bucket capacity is exceeded:

{
  "status": 429,
  "message": "Rate limit exceeded: throughput constraint violation",
  "error_code": "RATE_LIMIT_EXCEEDED"
}

The response includes a Retry-After header indicating millisecond-precision backoff duration.

Implementation Patterns

Token Monitoring

Implement continuous token monitoring:

function monitorRateLimit(response: Response): void {
  const remaining = parseInt(response.headers.get('X-RateLimit-Remaining'));
  const resetTime = parseInt(response.headers.get('X-RateLimit-Reset'));
  const currentTime = Math.floor(Date.now() / 1000);
  
  console.log(`Tokens remaining: ${remaining}`);
  console.log(`Reset in: ${resetTime - currentTime}s`);
}

Backoff Implementation

Implement exponential backoff with jitter:

async function backoffStrategy(retryCount: number): Promise<void> {
  const base = 100; // Base delay in ms
  const maxDelay = 10000; // Maximum delay in ms
  const jitter = Math.random() * 100;
  
  const delay = Math.min(
    maxDelay,
    Math.pow(2, retryCount) * base + jitter
  );
  
  await new Promise(resolve => setTimeout(resolve, delay));
}

API Documentation

Shifts

Moderations

Leaves

Authentication

Rate Limiting Architecture

Implementation Architecture

Rate Control Headers

Throughput Control Response

Implementation Patterns

Token Monitoring

Backoff Implementation

​Implementation Architecture

​Rate Control Headers

​Throughput Control Response

​Implementation Patterns

​Token Monitoring

​Backoff Implementation

Implementation Architecture

Rate Control Headers

Throughput Control Response

Implementation Patterns

Token Monitoring

Backoff Implementation