{"uid":"cap_jaRafCoj3Ze5Jdc6fn87U","slug":"workflows-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-4bbda06a","name":"A2A Indirect Prompt-Injection & Jailbreak Firewall","description":"Scans untrusted web pages, emails, MCP responses, or A2A payloads for hidden prompt injections and returns sanitized text. (Live x402 v2, IETF MPP & MCP endpoint at https://workflows.agentdiet.dev/v1/llm-guard)","url":"https://workflows.agentdiet.dev/v1/llm-guard?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","required":["text"],"properties":{"text":{"type":"string","minLength":1,"description":"Untrusted text, HTML, or tool output to scan for hidden prompt injection or jailbreak payloads"}}},"responseSchema":{"type":"object"},"example":null,"exampleRequest":null,"tags":[],"displayCostAmount":"0.005","displayCostAsset":"USD","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.005/call","primary":{"kind":"static","protocol":"mpp","network":"tempo","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"mpp","network":"tempo","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_Ypns9Q2l92pKsnvJyAF2u","protocol":"mpp","methodType":"crypto","chain":"tempo","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":"workflows.agentdiet.dev","brandSlug":"workflows-agentdiet-dev-mpp","brandBaseUrl":"https://workflows.agentdiet.dev","brandDocsUrl":null,"whatItDoes":"Scans untrusted text, HTML, emails, MCP responses, or A2A payloads for hidden prompt injections and jailbreak attempts, returning sanitized output.","exampleAgentPrompt":"Before passing this scraped webpage content to our LLM pipeline, scan it for hidden prompt injections or jailbreak payloads and give me back the sanitized text: [paste raw HTML or text here].","exampleUseCases":[{"title":"Agent pipeline web scrape guard","prompt":"I'm building an agent that fetches web pages and summarizes them — before each page hits the LLM, scan the raw HTML for any hidden prompt injection instructions so the model can't be hijacked."},{"title":"Email-to-agent inbox firewall","prompt":"My AI assistant reads incoming emails and acts on them autonomously. Can you screen this email body for embedded jailbreak or prompt injection attacks before the agent processes it?"},{"title":"MCP tool response sanitization","prompt":"This is the raw response from an external MCP tool my agent just called — check it for any indirect prompt injection payloads and return the cleaned version I can safely pass to my LLM."}],"resultDescription":"Returns a JSON object containing the scan result for the submitted text, including detection of hidden prompt injection or jailbreak payloads and a sanitized version of the input safe for LLM consumption.","failureModes":["Missing required 'text' parameter returns a 400 or validation error","Empty string input rejected due to minLength:1 constraint","Overly long payloads may be truncated or time out","Payment not fulfilled (x402 payment required) results in 402 response before scan is performed","Ambiguous or heavily obfuscated injections may evade detection"],"whenToPreferThis":"Choose this endpoint when your AI agent ingests untrusted external content — web pages, emails, third-party API responses, MCP tool outputs, or A2A payloads — and needs a dedicated firewall layer before that content reaches its LLM context. Prefer it over generic content filters when the threat model specifically involves indirect prompt injection and jailbreaking of autonomous agents.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T10:57:15.256Z","isFirstParty":false,"canonicalSlug":"workflows-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-c768e008"}