{"uid":"cap_OZ-xmjMk6a5FTRfSFfDSA","slug":"arxiv-digest-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-f329d378","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://arxiv-digest.agentdiet.dev/v1/injection-guard)","url":"https://arxiv-digest.agentdiet.dev/v1/injection-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_M2gqEjdW7KrrQtFlziNpE","protocol":"mpp","methodType":"crypto","chain":"tempo","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":"arxiv-digest.agentdiet.dev","brandSlug":"arxiv-digest-agentdiet-dev-mpp","brandBaseUrl":"https://arxiv-digest.agentdiet.dev","brandDocsUrl":null,"whatItDoes":"Scans untrusted text, HTML, emails, MCP responses, or A2A payloads for hidden prompt injections and jailbreak attempts, returning sanitized content.","exampleAgentPrompt":"Before you process this scraped web page content, run it through the injection-guard firewall to check for any hidden prompt injections or jailbreak attempts: [paste content here].","exampleUseCases":[{"title":"Sanitize scraped web content for agent pipeline","prompt":"I'm about to feed this web page's text into my summarization agent — can you first scan it for any hidden prompt injections or jailbreak payloads and give me the sanitized version?"},{"title":"Protect agent from malicious email body","prompt":"I just received this email that my assistant agent is about to parse — please check the email body for any indirect prompt injection attempts before it processes it."},{"title":"Validate MCP tool response before use","prompt":"My agent got back this MCP tool response from an external server — can you run it through the prompt injection firewall to make sure it's not trying to hijack my agent's instructions?"}],"resultDescription":"Returns an object indicating whether a prompt injection or jailbreak payload was detected in the submitted text, along with a sanitized version of the input safe to pass downstream to an LLM or agent pipeline.","failureModes":["Missing or empty 'text' parameter returns a validation error","Extremely long inputs may exceed payload limits or time out","Novel or obfuscated injection techniques may evade detection","Non-UTF-8 or binary content may cause parsing failures","Rate limiting or payment failure (HTTP 402) if credits are exhausted"],"whenToPreferThis":"Choose this endpoint when your AI agent ingests content from untrusted external sources — scraped web pages, emails, third-party API responses, MCP tool outputs, or A2A payloads — and you need to detect and strip adversarial prompt injections or jailbreak instructions before they reach your LLM. Prefer this over generic content filtering when the threat model is specifically prompt hijacking in agentic pipelines.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T07:24:35.722Z","isFirstParty":false,"canonicalSlug":"arxiv-digest-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-63370fac"}