Problems / Agents and tools, easy
Every tool call goes through an MCP gateway (auth, allow-lists, quotas) limited to 600 calls a minute. Agents make about 18 tool calls a second.
Free to open. Runs in your browser, no sign-up.
Success ≥ 95% of tasks, p99 ≤ 90 s.
3 requests a second for 45 seconds: 100% task (writes).
What each component does in this design, and what calls it. The simulator mimics each one from these settings.
| Component | Its job here | Settings |
|---|---|---|
| Load balancerLoad balancer | Traffic enters here.Calls Agent API.Layer 4 balancers route by IP and port; layer 7 balancers read HTTP and can route by path or header. | – |
| Agent APIApp service | Load balancer forwards to it.Calls Agent orchestrator.Little's law: throughput ≈ concurrency ÷ latency. 200 slots at 50 ms serve about 4,000 req/s. | 3 replicas × 500 slots · timeout 180 s |
| Agent orchestratorAgent orchestrator | Agent API calls it.Calls Model, MCP gateway.An agent loops: think, call a tool, read the result, repeat until done. | 400 slots · 6 steps |
| ModelLLM endpoint | Agent orchestrator calls it.Latency has two parts: time to the first token, then a steady stream of tokens per second. | 300 streams |
| MCP gatewayMCP gateway | Agent orchestrator calls it.Calls MCP tool servers.MCP (Model Context Protocol) is an open standard for connecting models to tools and data. | 2000 slots · 600 calls/min |
| MCP tool serversTool / MCP server | MCP gateway calls it.Tools give the model actions such as search or database queries; each call is another round trip. | 200 slots |
Try it first. Open one hint at a time if you get stuck.
18 × 60 ≈ 1,080 calls a minute.
Look for 429s on the gateway.
Raise the MCP gateway quota.