API · 4 min read ·
Safe demo APIs with validation and rate limits
- validation
- rate-limit
- demo API
Problem
Portfolios claim API skill without showing a request/response path — or they proxy expensive APIs with no limits.
Approach
Expose POST /api/demo that validates JSON, sanitizes input, rate-limits by IP, and returns a mock result with zero paid upstream calls.
Result
Interactive playground at /lab/playground.
What I learned
Demo endpoints should prove engineering habits (validation, limits), not burn API budget.
Related insights
Keep exploring
Ask the grounded assistant about this decision, or open the lab playground.