{"uid":"cap_yaX3_9PoVoqpN7zYJt-Dt","slug":"prompt-guard-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-d89b582a","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://prompt-guard.agentdiet.dev/v1/injection-guard)","url":"https://prompt-guard.agentdiet.dev/v1/injection-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_cyy_nzEBX1IRdepFugFty","protocol":"mpp","methodType":"crypto","chain":"tempo","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":"prompt-guard.agentdiet.dev","brandSlug":"prompt-guard-agentdiet-dev-mpp","brandBaseUrl":"https://prompt-guard.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 you process this scraped webpage content, run it through the prompt injection firewall to make sure there are no hidden jailbreak instructions embedded in it: [paste content here].","exampleUseCases":[{"title":"Sanitize scraped web content for agent pipeline","prompt":"I'm about to feed this HTML from an untrusted website into my AI pipeline — can you first scan it for any hidden prompt injection or jailbreak payloads and give me the sanitized version?"},{"title":"Guard agent from malicious email instructions","prompt":"Check this email body for any embedded prompt injection attacks before my AI assistant processes it — I don't want hidden instructions hijacking what it does next."},{"title":"Validate MCP tool response before consumption","prompt":"Before my agent acts on this MCP tool response, run it through the injection guard to make sure there's no adversarial content trying to override my agent's instructions."}],"resultDescription":"Returns a structured object indicating whether prompt injection or jailbreak content was detected, along with sanitized text safe for further LLM processing.","failureModes":["Empty or missing 'text' parameter returns a validation error","Extremely large payloads may be truncated or rejected","Obfuscated or encoded injections may evade detection","Payment failure via x402 prevents processing","Non-text binary content passed as text may produce unreliable results"],"whenToPreferThis":"Use this endpoint when your AI agent pipeline ingests content from untrusted external sources — web pages, emails, third-party API responses, MCP tool outputs, or A2A messages — and you need a dedicated security layer to detect and strip hidden prompt injections or jailbreak attempts before they reach your LLM. Prefer this over generic content filters when the threat model specifically involves adversarial LLM instruction injection rather than spam or malware.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T07:25:25.333Z","isFirstParty":false,"canonicalSlug":"prompt-guard-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-3e4a7f21"}