Concurrency Guard

Try before payment

Inspect a representative partial result, exact price and copy-ready upgrade instructions. No wallet, signature or payment required.

Copy-ready MCP call

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "concurrency_guard",
    "arguments": {"requested_slots":1,"active_slots":2,"lease_id":"lease-1","idempotency_key":"job-1","lease_valid_until":4102444800,"counter_observed_at":4102444700,"policy":{"maximum_slots":4,"maximum_counter_age_seconds":300}}
  }
}

What the agent receives

Allow or throttle with projected and available slots.

No API key or subscription. The first paid request returns HTTP 402 payment requirements; an x402 client signs and retries automatically.