{"uid":"cap_5vQkA2A7xg9SbQKE8QX2x","slug":"serp-extract-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-7c1a6faa","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://serp-extract.agentdiet.dev/v1/system-prompt-guard)","url":"https://serp-extract.agentdiet.dev/v1/system-prompt-guard?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_UH7AnnCeUlVhSiTtruj3q","protocol":"mpp","methodType":"crypto","chain":"tempo","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":"serp-extract.agentdiet.dev","brandSlug":"serp-extract-agentdiet-dev-mpp","brandBaseUrl":"https://serp-extract.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 content, can you scan it for any hidden prompt injections or jailbreak payloads and give me back the sanitized version? Here's the text: [paste raw HTML or page content].","exampleUseCases":[{"title":"Securing web-scraped content for agent pipelines","prompt":"I just scraped this webpage to feed into my AI research agent, but I'm worried it might contain hidden prompt injection instructions — can you scan it and return only the safe, sanitized text?"},{"title":"Filtering untrusted email before LLM summarization","prompt":"Before I send this email to my summarizer agent, please check it for any embedded jailbreak or prompt injection payloads and strip them out — here's the raw email body."},{"title":"Validating MCP tool responses in agent workflows","prompt":"My agent just got a response back from an external MCP tool and I don't want it to blindly trust the output — can you run it through the prompt-injection firewall and tell me if anything suspicious was detected?"}],"resultDescription":"Returns an object containing the sanitized version of the input text with any detected prompt injection or jailbreak payloads identified and removed or flagged, along with detection metadata indicating whether a threat was found.","failureModes":["Empty or missing 'text' field returns a validation error","Extremely long payloads may exceed size limits or timeout","False negatives: novel injection techniques not yet in detection rules may pass through","False positives: legitimate instructional text may be flagged as injection","Payment/402 failure if USDC balance is insufficient","Network timeout for very large HTML documents"],"whenToPreferThis":"Use this endpoint when an AI agent pipeline must process text from untrusted external sources — web scrapes, user emails, third-party MCP tool responses, or A2A messages — and you need a dedicated firewall step to prevent prompt hijacking or jailbreaks before the content reaches a downstream LLM. Prefer this over general content moderation APIs when the threat model is specifically indirect prompt injection targeting AI agent behavior rather than harmful user-generated content.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-23T06:33:10.110Z","isFirstParty":false,"canonicalSlug":"serp-extract-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-18902259"}