---
title: "What is an idempotency key? · Audon"
description: "Idempotency key: A key of 8–200 characters sent with every execute call, one per intent and reused on every retry of that intent."
url: https://audon.ai/glossary/idempotency-key
last_updated: 2026-11-02
---
# What is an idempotency key?

A key of 8–200 characters sent with every execute call, one per intent and reused on every retry of that intent.

Agent actions

## Idempotency key

A key of 8–200 characters sent with every execute call, one per intent and reused on every retry of that intent. The same key returns the original action’s current state and never executes again; the same key with a different body is an `idempotency_conflict`.

Used in [Agent Action Control](https://audon.ai/product/agent-action-control) · [Action Control concepts](https://audon.ai/docs/action-control#idempotency)

## Related terms.

- [Protected action

   A business action an AI agent proposes (a refund, a customer credit, a discount, a subscription change or an order cancel) that runs through Audon.](https://audon.ai/glossary/protected-action)
- [Decision

   What Audon decided about a proposed action.](https://audon.ai/glossary/decision)
- [Outcome

   What actually happened at the provider.](https://audon.ai/glossary/outcome)
- [Unknown outcome

   The state of an action when the provider’s answer doesn’t say what happened (a timeout after sending, a 409 or a 5xx).](https://audon.ai/glossary/unknown-outcome)
- [Monitoring mode

   The mode an organization starts in.](https://audon.ai/glossary/monitoring-mode)
- [Agent key

   A key (aa_agent_…) bound to one agent that carries only integrity:execute.](https://audon.ai/glossary/agent-key)

[All terms](https://audon.ai/glossary)

Last updated 2 November 2026

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