{"uid":"cap_p5yhGlkC8NwxlQJ2nDl3s","slug":"sec-intel-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-cb9779a7","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://sec-intel.agentdiet.dev/v1/llm-guard)","url":"https://sec-intel.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_I6fKo0pD-KM9CO-hb_nB8","protocol":"mpp","methodType":"crypto","chain":"tempo","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":"sec-intel.agentdiet.dev","brandSlug":"sec-intel-agentdiet-dev-mpp","brandBaseUrl":"https://sec-intel.agentdiet.dev","brandDocsUrl":null,"whatItDoes":"Scans untrusted text, HTML, emails, MCP responses, or A2A payloads for hidden prompt-injection and jailbreak attacks, returning sanitized output.","exampleAgentPrompt":"Before you process this scraped webpage content, run it through the LLM Guard firewall to check for hidden prompt injection or jailbreak payloads — here's the raw HTML: [paste content here].","exampleUseCases":[{"title":"Safe web content ingestion for RAG","prompt":"I'm about to feed this scraped article into my RAG pipeline — can you first scan it for any hidden prompt injection instructions embedded in the HTML before I index it?"},{"title":"Email body safety check before agent reply","prompt":"This incoming email is about to be read by my autonomous email-reply agent — please scan the full email body first to make sure it doesn't contain any hidden jailbreak or prompt-hijacking instructions."},{"title":"MCP tool response sanitization","prompt":"My agent just got back a response from an untrusted MCP tool — before it acts on it, scan the payload for any indirect prompt injections or adversarial instructions hidden inside."}],"resultDescription":"Returns a structured object indicating whether the input text contains prompt-injection or jailbreak content, along with sanitized text safe for downstream LLM consumption. May include threat classification, flagged spans, and a clean version of the input.","failureModes":["Empty or missing 'text' parameter returns a validation error","Extremely long inputs may be truncated or rejected","False negatives possible for novel/obfuscated injection techniques","Network timeout if the service is unavailable","402 Payment Required if USDC micropayment is not included or insufficient"],"whenToPreferThis":"Choose this endpoint when your agent is consuming text from untrusted external sources — scraped web pages, user emails, third-party API/MCP responses, or A2A payloads — before passing them into an LLM context window. Especially valuable in autonomous agent pipelines where a compromised tool response could hijack agent behavior. Prefer this over generic content moderation endpoints when the specific threat model is prompt injection and jailbreak rather than hate speech or NSFW content.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T07:23:41.839Z","isFirstParty":false,"canonicalSlug":"sec-intel-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-63e04ebf"}