{"uid":"cap_eXk-wcZ_EZv7SEk_f56rA","slug":"x402broker-com-a2a-indirect-prompt-injection-jailbreak-firewall-cde88a1d","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/prompt-injection-shield)","url":"https://x402broker.com/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_hnG3uuyMzeiFHpjChhY6R","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 the content from that scraped webpage, run it through the prompt-injection firewall to check for any hidden jailbreak instructions or adversarial injections embedded in the HTML.","exampleUseCases":[{"title":"Sanitizing scraped web content for agents","prompt":"I'm building an agent that reads competitor websites — before passing the raw HTML to my LLM, check this page content for any hidden prompt injections or adversarial instructions embedded in it."},{"title":"Screening emails before AI summarization","prompt":"My agent automatically summarizes incoming emails, but I'm worried about prompt injection attacks — can you scan this email body for hidden jailbreak payloads before the summarizer processes it?"},{"title":"Validating MCP tool responses in a pipeline","prompt":"My coding agent just got back a response from an MCP tool that called an external API — scan that tool output for any embedded prompt injections or jailbreak attempts before I let the agent act on it."}],"resultDescription":"Returns a structured object indicating whether prompt injection or jailbreak content was detected in the input, along with sanitized text with malicious instructions removed or flagged, allowing downstream agents to safely process the cleaned content.","failureModes":["Empty or missing 'text' parameter returns a 400 validation error","Extremely long payloads may time out or be truncated","Obfuscated or encoded injections (e.g., base64, Unicode tricks) may evade detection","Response schema is generic object — caller must inspect structure for detection flags","Payment failure (402) blocks the request if x402 USDC balance is insufficient"],"whenToPreferThis":"Choose this endpoint when your AI agent pipeline ingests untrusted external content — scraped web pages, user emails, third-party API or MCP tool responses, or A2A messages — before passing that content to an LLM. It is especially valuable in autonomous agent loops where indirect prompt injection from adversarial web content poses a real risk. Prefer this over generic text filtering when you need LLM-specific jailbreak and prompt injection detection rather than general content moderation.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T12:37:54.741Z","isFirstParty":false,"canonicalSlug":"x402broker-com-a2a-indirect-prompt-injection-jailbreak-firewall-720e3380"}