{"uid":"cap_Hcdr9_WV8nKwBwuzz4Kp8","slug":"mcp-compiler-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-60e35891","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://mcp-compiler.agentdiet.dev/v1/system-prompt-guard)","url":"https://mcp-compiler.agentdiet.dev/v1/system-prompt-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_z1hlgO_e02aInY2xpVAB0","protocol":"mpp","methodType":"crypto","chain":"tempo","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":"mcp-compiler.agentdiet.dev","brandSlug":"mcp-compiler-agentdiet-dev-mpp","brandBaseUrl":"https://mcp-compiler.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 that scraped webpage content, run it through the prompt-injection firewall first — I want to make sure there are no hidden jailbreak instructions embedded in the HTML trying to hijack you.","exampleUseCases":[{"title":"Screening scraped web content before processing","prompt":"I just pulled the text from that third-party site, but before you summarize it or act on anything in it, can you scan it for hidden prompt injections? I don't trust the source and don't want it to manipulate you."},{"title":"Securing an email-processing agent pipeline","prompt":"My agent reads inbound emails and takes actions based on them — can you check this email body for any embedded jailbreak attempts or prompt injection tricks before the agent processes it?"},{"title":"Validating MCP tool responses in an agent swarm","prompt":"Before my orchestrator agent acts on this MCP tool response, run it through the prompt-injection firewall and return the sanitized version — I want to make sure no rogue tool is trying to override my agent's instructions."}],"resultDescription":"Returns a sanitized version of the input text with hidden prompt injections and jailbreak payloads removed or flagged, along with detection metadata indicating whether malicious content was found.","failureModes":["Empty or missing 'text' parameter returns a validation error","Extremely long payloads may be truncated or rejected","Obfuscated or novel injection techniques may evade detection","Payment failure (402) if x402 micropayment is not properly configured","Non-text binary content may not be parsed correctly"],"whenToPreferThis":"Choose this endpoint when your AI agent pipeline ingests untrusted external content — scraped web pages, inbound emails, third-party API responses, MCP server outputs, or A2A payloads — and you need to sanitize it before passing it to an LLM to prevent indirect prompt injection or jailbreak hijacking. Prefer it over generic content filters when the threat model is specifically adversarial prompt manipulation targeting AI agents.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T07:25:51.740Z","isFirstParty":false,"canonicalSlug":"mcp-compiler-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-2be101c9"}