Free developer tools
AI API calculators and testers
Estimate cost, check endpoint settings, compare model pricing, and plan API key budgets before running larger workloads.
Cost calculator
Token cost calculator
Estimate AI API request cost from input tokens, output tokens, cached tokens, model pricing, and request volume.
Spend estimator
AI API cost calculator
Calculate estimated daily and monthly AI API spend for chat apps, coding agents, SaaS features, and developer tools.
Endpoint tester
OpenAI-compatible base URL tester
Check whether a base URL shape looks ready for OpenAI-compatible clients, SDKs, and coding tools.
Budget planner
API key budget calculator
Plan per-key daily and monthly AI API budgets before giving an API key to a client, app, teammate, or coding agent.
Model pricing
Model price comparison
Compare model input, output, and cached token costs to choose a safer routing policy for AI API workloads.