Concept

Idempotency

Idempotency lets a client repeat the same operation safely without creating duplicate work.

Why it matters

Client retries, network retries, and wait-mode fallbacks can all send the same operation more than once.

How ReqRun approaches it

ReqRun deduplicates by project plus idempotency_key. The API key resolves the project automatically.

TypeScript

await reqrun.chat.completions.create({
  model: "gpt-5-nano",
  messages: [{ role: "user", content: "Classify ticket 842" }],
  wait: true,
  idempotency_key: "ticket-842-classification",
});