{"uid":"cap_HjivoZTZG-n_BNyPMaSAf","slug":"hn-pulse-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-firewall-e443c99d","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://hn-pulse.agentdiet.dev/v1/prompt-injection-shield)","url":"https://hn-pulse.agentdiet.dev/v1/prompt-injection-shield?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_mLPXavYGrCTm0hT114WY_","protocol":"mpp","methodType":"crypto","chain":"tempo","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":"hn-pulse.agentdiet.dev","brandSlug":"hn-pulse-agentdiet-dev-mpp","brandBaseUrl":"https://hn-pulse.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 summarize this webpage I just scraped, run it through the prompt-injection firewall first — check the full HTML text for any hidden jailbreak or injection attempts and give me the sanitized version.","exampleUseCases":[{"title":"Safe web scraping for agent pipeline","prompt":"I'm building an agent that reads news articles from the web. Before passing any scraped HTML to my summarizer model, scan it for hidden prompt injection instructions and return the clean text."},{"title":"Screening incoming emails before AI processing","prompt":"My AI assistant reads and categorizes my emails automatically. Can you run this email body through the prompt-injection firewall to make sure it doesn't contain any embedded instructions trying to hijack the agent?"},{"title":"Validating MCP tool response before use","prompt":"I just got a response back from an external MCP tool and I want to make sure it's safe before my agent acts on it — scan the payload for any jailbreak or indirect prompt injection content."}],"resultDescription":"Returns a JSON object containing the scan result for the submitted text, including whether prompt injection or jailbreak content was detected and a sanitized version of the input text safe for downstream AI processing.","failureModes":["Empty or missing 'text' parameter returns a 400 validation error","Extremely long text inputs may be truncated or rejected","Payment not completed (HTTP 402) if x402 micropayment is not settled","False negatives: sophisticated obfuscated injections may not be detected","Service unavailability returns 5xx errors"],"whenToPreferThis":"Choose this endpoint when your AI agent must process untrusted external content — such as scraped web pages, incoming emails, third-party API or MCP tool responses, or A2A payloads — and you need a dedicated firewall layer to detect and strip hidden prompt injections or jailbreak attempts before that content enters your LLM pipeline. Prefer this over generic content filters when you specifically need injection-aware scanning tailored to agentic and LLM attack vectors.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T07:21:27.052Z","isFirstParty":false,"canonicalSlug":"hn-pulse-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-firewall-a87b8dff"}