{"uid":"cap_DXWO3Sl_8N8sSeSt3ezIq","slug":"shopify-spy-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-33fe8ce8","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://shopify-spy.agentdiet.dev/v1/system-prompt-guard)","url":"https://shopify-spy.agentdiet.dev/v1/system-prompt-guard?utm_source=zero.xyz","method":"POST","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_n9qVZheeifGK8xC2Aw617","protocol":"mpp","methodType":"crypto","chain":"tempo","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":"shopify-spy.agentdiet.dev","brandSlug":"shopify-spy-agentdiet-dev-mpp","brandBaseUrl":"https://shopify-spy.agentdiet.dev","brandDocsUrl":null,"whatItDoes":"Scans untrusted text, web pages, emails, MCP responses, or A2A payloads for hidden prompt injections and jailbreak attempts, returning sanitized content.","exampleAgentPrompt":"Before you use that web page's content, scan it for hidden prompt injections or jailbreak payloads and give me back the sanitized version so it's safe to process.","exampleUseCases":[{"title":"Guard agent against malicious web scrape","prompt":"I just scraped this HTML from an external site to feed into my agent pipeline — can you run it through the prompt injection firewall and give me the clean, safe version before I pass it along?"},{"title":"Validate MCP tool response before use","prompt":"My agent just got back a response from an external MCP tool. Can you scan that response text for any hidden prompt injections or jailbreak instructions before my agent acts on it?"},{"title":"Screen inbound email for LLM attacks","prompt":"I'm about to feed this customer email into my AI assistant to draft a reply — please check it first for any embedded prompt injection attacks and return the sanitized text."}],"resultDescription":"Returns a JSON object containing the sanitized version of the input text with hidden prompt injection or jailbreak payloads removed or flagged, along with detection metadata indicating whether malicious content was found.","failureModes":["Empty or missing 'text' field returns a 400 validation error","Extremely large payloads may exceed input limits or increase latency","Payment failure via x402 returns a 402 response requiring USDC payment on Base","False negatives: sophisticated obfuscated injections may not always be detected","Non-UTF-8 or binary content may cause parsing errors"],"whenToPreferThis":"Choose this endpoint when your agent pipeline ingests untrusted external content — scraped web pages, emails, MCP/A2A tool responses, or user-submitted text — and you need a dedicated security layer to strip or flag hidden prompt injection and jailbreak payloads before passing content to your LLM. Prefer this over ad-hoc filtering when you need a consistent, auditable firewall step in your agent workflow, especially in multi-agent or autonomous environments where indirect prompt injection is a real attack surface.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-23T06:32:28.440Z","isFirstParty":false,"canonicalSlug":"shopify-spy-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-2787c422"}