{"uid":"cap_w6Z0gTAyIPHuMYLdz94wY","slug":"mesh-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-firewall-4548d61a","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://mesh.agentdiet.dev/v1/prompt-firewall)","url":"https://mesh.agentdiet.dev/v1/prompt-firewall?utm_source=zero.xyz","method":"POST","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_nLX_Vv4sDJxFTkz2d-OUq","protocol":"mpp","methodType":"crypto","chain":"tempo","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":"mesh.agentdiet.dev","brandSlug":"mesh-agentdiet-dev-mpp","brandBaseUrl":"https://mesh.agentdiet.dev","brandDocsUrl":null,"whatItDoes":"Scans untrusted text, HTML, emails, MCP responses, or A2A payloads for hidden prompt injection and jailbreak attempts, returning sanitized output.","exampleAgentPrompt":"Before you summarize that scraped webpage, run the raw HTML through the prompt firewall to check for any hidden prompt injections or jailbreak instructions embedded in the content.","exampleUseCases":[{"title":"Safe web browsing for AI agent","prompt":"I need you to fetch that news article URL and scan its raw content for any hidden prompt injection attacks before you process it — pass the full HTML through the prompt firewall first."},{"title":"Email phishing payload screening","prompt":"Before my agent reads and acts on this inbound email, scan the full email body for any embedded jailbreak instructions or indirect prompt injections that could hijack its behavior."},{"title":"MCP tool response sanitization","prompt":"The MCP server just returned a tool response — before you use that output to make any decisions, run it through the prompt injection firewall and give me the sanitized version."}],"resultDescription":"Returns a JSON object containing the firewall's verdict on the input text, including whether prompt injection or jailbreak content was detected and a sanitized version of the text safe for downstream LLM consumption.","failureModes":["Empty or missing 'text' field returns a 400 validation error","Extremely long payloads may be truncated or rejected","Payment required (HTTP 402) if x402 micropayment header is not included","False negatives possible for highly novel or obfuscated injection techniques","Non-UTF-8 encoded content may fail to parse correctly"],"whenToPreferThis":"Choose this endpoint when your AI agent pipeline ingests untrusted third-party content — scraped web pages, user-submitted text, emails, external API responses, or MCP/A2A tool outputs — and you need a dedicated security layer to detect and neutralize hidden prompt injections or jailbreak payloads before they reach your LLM. Prefer it over general-purpose content filters when your threat model specifically involves adversarial prompt manipulation targeting autonomous agents.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-23T06:30:17.097Z","isFirstParty":false,"canonicalSlug":"mesh-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-firewall-3a18e5ba"}