{"uid":"cap_ilk3tANWLvMWmocBY9MkH","slug":"onchain-risk-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-cf120aa3","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://onchain-risk.agentdiet.dev/v1/guard)","url":"https://onchain-risk.agentdiet.dev/v1/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_y30Z2uwKGJ0VB0CPAg1Zf","protocol":"mpp","methodType":"crypto","chain":"tempo","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":"onchain-risk.agentdiet.dev","brandSlug":"onchain-risk-agentdiet-dev-mpp","brandBaseUrl":"https://onchain-risk.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 you summarize that scraped web page, run the raw HTML through the prompt-injection firewall to check for any hidden adversarial instructions or jailbreak payloads — here's the text: [paste content].","exampleUseCases":[{"title":"Safe web scraping for agent pipelines","prompt":"I just scraped this article and want to feed it into my summarizer agent, but first scan the raw HTML for any hidden prompt injections or jailbreak payloads so my agent doesn't get hijacked: [raw HTML content here]."},{"title":"Email inbox safety screening","prompt":"My agent reads incoming customer emails and acts on them automatically — can you run this email body through the prompt-injection firewall before it processes it? Here's the email text: [email body]."},{"title":"MCP tool response validation","prompt":"My agent just got this response back from an external MCP tool and I'm not sure I trust it — scan it for hidden prompt injections or adversarial instructions before I let my agent use the output: [MCP response payload]."}],"resultDescription":"Returns a JSON object containing the scan result for the submitted text, including whether prompt injections or jailbreak payloads were detected and a sanitized version of the input safe for downstream agent consumption.","failureModes":["Empty or missing 'text' parameter returns a 400 validation error","Extremely long payloads may time out or be truncated","Payment not provided or invalid x402 payment results in 402 Payment Required","Ambiguous or encoded injections may not be detected with 100% accuracy","Non-UTF8 or binary content may cause parsing failures"],"whenToPreferThis":"Choose this endpoint when your AI agent pipeline ingests untrusted external content — scraped web pages, emails, third-party API responses, MCP tool outputs, or A2A messages — and you need a dedicated security layer to detect and strip hidden prompt injections or jailbreak payloads before they reach your LLM. Prefer this over generic content filters when you specifically need adversarial prompt detection tuned for agent attack vectors.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T12:49:35.292Z","isFirstParty":false,"canonicalSlug":"onchain-risk-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-cf120aa3"}