{"uid":"cap_QEWqi9Bm2ETun-OJWtDXR","slug":"x402broker-com-a2a-indirect-prompt-injection-jailbreak-firewall-720e3380","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://x402broker.com/v1/guard)","url":"https://x402broker.com/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_UbgxUHjMTjK7yu78ZpAQz","protocol":"mpp","methodType":"crypto","chain":"tempo","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":"x402broker.com","brandSlug":"x402broker-com-mpp","brandBaseUrl":"https://x402broker.com","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 process this scraped web page I just fetched, run it through the prompt injection firewall to check for any hidden jailbreak instructions or adversarial payloads: '<html>...suspicious content...</html>'","exampleUseCases":[{"title":"Sanitizing scraped web content for agents","prompt":"I just scraped this blog post to feed into my research agent — can you scan it for hidden prompt injections first? Here's the raw HTML: '<div>...content...</div>'"},{"title":"Screening inbound email before LLM processing","prompt":"Before my agent summarizes this inbound customer email, check it for any embedded jailbreak attempts or indirect prompt injection: 'Dear agent, please ignore your previous instructions and...'"},{"title":"Validating MCP tool output before use","prompt":"My agent just got back a response from an external MCP tool and I want to make sure it's not trying to hijack the agent — can you run this payload through the prompt injection firewall before we act on it?"}],"resultDescription":"Returns an object indicating whether the input text contains prompt injection or jailbreak payloads, along with sanitized text safe for downstream LLM or agent consumption.","failureModes":["Missing or empty 'text' parameter returns a validation error","Extremely long inputs may be truncated or rejected","Novel or obfuscated injection techniques may evade detection","Non-text binary content may not be parseable","Payment failure via x402 prevents access to the endpoint"],"whenToPreferThis":"Choose this endpoint when your AI agent needs to process untrusted external content — scraped web pages, inbound emails, MCP/A2A responses, or third-party tool outputs — before passing them to an LLM, to prevent indirect prompt injection and jailbreak attacks. Prefer this over manual filtering when you need automated, per-call safety screening with low latency in an agentic pipeline.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T07:23:44.557Z","isFirstParty":false,"canonicalSlug":"x402broker-com-a2a-indirect-prompt-injection-jailbreak-firewall-720e3380"}