{"uid":"cap_ywCMUDuMQ9165_d7SjYMM","slug":"x402broker-com-a2a-indirect-prompt-injection-jailbreak-firewall-97548ffb","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_D93aJJd8f3ExKxdB0miws","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 content, run it through the prompt injection firewall to check for any hidden jailbreak instructions and give me the sanitized version: '<html>...untrusted content here...</html>'","exampleUseCases":[{"title":"Sanitize scraped web content for agent","prompt":"I'm about to feed this scraped article into my agent pipeline — can you first scan it through the prompt injection firewall to make sure there are no hidden instructions embedded in the HTML that could hijack my agent's behavior?"},{"title":"Guard agent from malicious email body","prompt":"Before my agent summarizes this incoming email, run the email body through the jailbreak firewall to check if it contains any embedded prompt injection attempts trying to manipulate the AI."},{"title":"Validate MCP tool response safety","prompt":"My agent just got a response back from an external MCP tool — can you scan that response text for hidden prompt injections or adversarial instructions before my agent acts on it?"}],"resultDescription":"Returns a structured object containing the sanitized version of the input text with any detected prompt injection or jailbreak payloads removed or flagged, along with detection metadata indicating whether malicious content was found.","failureModes":["Empty or missing 'text' parameter returns a 400 validation error","Extremely long input text may be truncated or rejected","False negatives: novel or obfuscated injection patterns may not be detected","False positives: legitimate instructional text may be incorrectly flagged","Payment failure (402) if USDC balance is insufficient","Service unavailability returns 5xx errors"],"whenToPreferThis":"Choose this endpoint when your AI agent pipeline ingests content from untrusted external sources — scraped web pages, user-submitted text, third-party API responses, MCP tool outputs, or A2A payloads — and you need to sanitize them before passing to an LLM. Prefer this over manual filtering when you need automated, real-time detection of indirect prompt injection and jailbreak patterns specifically designed to exploit AI agents.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T07:23:35.051Z","isFirstParty":false,"canonicalSlug":"x402broker-com-a2a-indirect-prompt-injection-jailbreak-firewall-720e3380"}