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Resources/Idempotency key contract template (.NET)

Idempotency key contract template (.NET)

A key format, storage checklist, and replay rules to prevent duplicate side effects in .NET APIs.

FreeFeb 04, 2026

What’s inside

Individual files are accessible (best for SEO/AI), plus you can download the full ZIP.

idempotency-contract-template.mdmdidempotency-key-strategy.mdmdREADME.mdmdrequest-cache-schema.sqlsql

Source code

This resource is backed by a public GitHub repository with source code, templates, and documentation you can fork, review, and integrate.

View on GitHub

From this article

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Idempotency keys for APIs: stop duplicate orders, emails, and writes
When retries create duplicate side effects, idempotency keys are the only safe fix. This playbook shows how to design keys, store results, and prove duplicates cannot recur.

Use this when retries are creating duplicate orders, emails, or writes.

What you get

  • idempotency-contract-template.md
  • idempotency-key-strategy.md
  • request-cache-schema.sql
  • README.md

How to use

  • On call: confirm the key is required and stored before side effects.
  • Tech lead: add a shared middleware for key validation and replay.
  • CTO: require idempotency on all state changing endpoints.

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Canonical: https://matrixtrak.com/resources/idempotency-keys-contract-template-dotnet