{"uid":"cap_y6gb2fRhkO3wRIO4-EUQh","slug":"x402-audit-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-28b2787c","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://x402-audit.agentdiet.dev/v1/system-prompt-guard)","url":"https://x402-audit.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_2xTYulFLc1hoN6rxYL3qI","protocol":"mpp","methodType":"crypto","chain":"tempo","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":"x402-audit.agentdiet.dev","brandSlug":"x402-audit-agentdiet-dev-mpp","brandBaseUrl":"https://x402-audit.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 my agent processes this scraped webpage, run it through the prompt-injection firewall to check for hidden jailbreak instructions and give me the sanitized version: '<html>...</html>'","exampleUseCases":[{"title":"Protecting agent from malicious web scrape","prompt":"I just scraped this webpage to feed into my AI pipeline, but I'm worried it might contain hidden prompt injections — can you scan this HTML for any embedded jailbreak attempts and return the clean version?"},{"title":"Validating inbound email before LLM processing","prompt":"Before my agent reads and summarizes this inbound email, check it for indirect prompt injection attacks or hidden instructions that could hijack the agent's behavior."},{"title":"Sanitizing MCP tool response in agentic workflow","prompt":"My agent just got back a response from an external MCP tool and I need to make sure it doesn't contain adversarial prompts before passing it downstream — can you run it through the jailbreak firewall?"}],"resultDescription":"Returns a structured object indicating whether prompt injection or jailbreak payloads were detected in the input text, along with a sanitized version of the content safe for downstream LLM or agent consumption.","failureModes":["Empty or missing 'text' parameter returns a validation error","Extremely large payloads may time out or be truncated","Novel or obfuscated injection techniques may evade detection","Non-English or encoded injection patterns may reduce detection accuracy","HTTP 402 payment required if x402 payment header is absent or insufficient"],"whenToPreferThis":"Choose this endpoint when your AI agent pipeline ingests untrusted external content — scraped web pages, emails, user submissions, MCP tool outputs, or A2A payloads — before passing that content to an LLM, to protect against indirect prompt injection and jailbreak attacks embedded in third-party data. Prefer this over generic content filters when your specific threat model involves adversarial LLM manipulation rather than spam or toxic language.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T12:51:14.690Z","isFirstParty":false,"canonicalSlug":"x402-audit-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-cd2da2c7"}