--- title: Protecting Your RAG Agent | daily.dev description: A practical walkthrough of techniques used to protect a RAG agent from malicious users and prompt injection attacks. Covers rate limiting with FastAPI, request... canonical: https://daily.dev/posts/protecting-your-rag-agent-o1axl3ef1 twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Protecting Your RAG Agent | daily.dev og:description: A practical walkthrough of techniques used to protect a RAG agent from malicious users and prompt injection attacks. Covers rate limiting with FastAPI, request... og:url: https://daily.dev/posts/protecting-your-rag-agent-o1axl3ef1 og:image: https://api.daily.dev/og/posts/o1AXL3eF1.png og:image:alt: Protecting Your RAG Agent og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Protecting Your RAG Agent **[Viget](https://daily.dev/sources/viget)** · 12 min read · 1 upvotes · 0 comments ## Summary A practical walkthrough of techniques used to protect a RAG agent from malicious users and prompt injection attacks. Covers rate limiting with FastAPI, request validation with Pydantic (including control character rejection and length limits), token usage caps via Amazon Bedrock settings, regex-based prompt filtering for common jailbreak patterns, AWS Bedrock Guardrails for content and PII filtering, and wrapping user input in XML tags paired with system prompt instructions to mark untrusted data. Code examples are provided for each technique using Python, FastAPI, Pydantic AI, and Amazon Bedrock. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [How to Build Production-Grade AI Guardrails for Enterprise Applications: A Practical Guide](https://daily.dev/posts/how-to-build-production-grade-ai-guardrails-for-enterprise-applications-a-practical-guide-zengcqngi) · freeCodeCamp · 1 upvotes · 0 comments --- Tags: [#rag](https://daily.dev/tags/rag), [#fastapi](https://daily.dev/tags/fastapi), [#prompt-injection](https://daily.dev/tags/prompt-injection), [#amazon-bedrock](https://daily.dev/tags/amazon-bedrock) [View this post on daily.dev](https://daily.dev/posts/protecting-your-rag-agent-o1axl3ef1) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Protecting Your RAG Agent","url":"https://daily.dev/posts/protecting-your-rag-agent-o1axl3ef1","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/protecting-your-rag-agent-o1axl3ef1"},"datePublished":"2026-06-08T16:26:26.527Z","dateModified":"2026-06-08T16:26:49.589Z","description":"A practical walkthrough of techniques used to protect a RAG agent from malicious users and prompt injection attacks. 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