{"uid":"cap_njFTIiPX2Rh3fnZjIaESP","slug":"whale-momentum-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-78a4b524","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://whale-momentum.agentdiet.dev/v1/prompt-shield)","url":"https://whale-momentum.agentdiet.dev/v1/prompt-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_RqXc0F5tcyhSrnVvXsZko","protocol":"mpp","methodType":"crypto","chain":"tempo","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":"whale-momentum.agentdiet.dev","brandSlug":"whale-momentum-agentdiet-dev-mpp","brandBaseUrl":"https://whale-momentum.agentdiet.dev","brandDocsUrl":null,"whatItDoes":"Scans untrusted text, HTML, emails, MCP responses, or A2A payloads for hidden prompt injections and jailbreak attempts, returning sanitized content.","exampleAgentPrompt":"Before you process that web page I just scraped, run the content through the prompt-shield firewall to check for any hidden prompt injections or jailbreak instructions embedded in it.","exampleUseCases":[{"title":"Sanitize scraped web content before agent ingestion","prompt":"I'm about to feed this scraped HTML from an external site into my agent pipeline — can you run it through the prompt-shield firewall first to strip out any hidden prompt injections before my agent reads it?"},{"title":"Screen incoming email for adversarial instructions","prompt":"Before my agent summarizes this incoming email, scan the full email body for any embedded prompt injection or jailbreak payloads that could hijack the agent's behavior."},{"title":"Validate MCP tool response before acting on it","prompt":"My agent just got a response back from an external MCP tool — can you run that response text through the prompt-shield scanner to make sure there are no hidden adversarial instructions in it before we act on the result?"}],"resultDescription":"Returns a JSON object containing the sanitized version of the input text with any detected prompt injection or jailbreak payloads removed or flagged, allowing the agent to safely process the cleaned content.","failureModes":["Empty or missing 'text' parameter returns a validation error","Extremely long input text may hit size limits or timeout","Ambiguous or borderline injection patterns may be missed or over-flagged","Non-English or heavily encoded content may reduce detection accuracy","Service unavailability returns HTTP 402 or 5xx errors"],"whenToPreferThis":"Choose this endpoint when your AI agent needs to process untrusted third-party content — scraped web pages, external emails, MCP tool responses, or A2A payloads — before acting on them, specifically to defend against indirect prompt injection and jailbreak attacks. Prefer it over generic content filters when you need security screening tuned for LLM-specific attack vectors like hidden instructions in HTML or adversarial tool outputs.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T07:21:38.317Z","isFirstParty":false,"canonicalSlug":"whale-momentum-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-87ce958b"}