{"uid":"cap_JFCi_XtgvvXAwdcZuZuCA","slug":"prompt-guard-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-ea5676c9","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://prompt-guard.agentdiet.dev/api)","url":"https://prompt-guard.agentdiet.dev/api?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_cbDomvEfI7hcoZNDGPNl1","protocol":"mpp","methodType":"crypto","chain":"tempo","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":"prompt-guard.agentdiet.dev","brandSlug":"prompt-guard-agentdiet-dev-mpp","brandBaseUrl":"https://prompt-guard.agentdiet.dev","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 that scraped web page, can you run the content through the prompt-injection firewall to check for any hidden jailbreak instructions or malicious prompt overrides embedded in it?","exampleUseCases":[{"title":"Sanitizing scraped web content for an agent","prompt":"I'm about to feed this webpage's raw HTML to my research agent — can you first scan it for any hidden prompt injections or jailbreak payloads and give me the cleaned version?"},{"title":"Checking inbound email before LLM summarization","prompt":"Before my email-summarizer agent reads this inbound message, run it through the prompt-injection firewall to make sure there are no embedded instructions trying to hijack the agent."},{"title":"Validating MCP tool output in an agent pipeline","prompt":"My agent just got a response from an external MCP tool — can you scan that payload for indirect prompt injections before I let the agent act on it?"}],"resultDescription":"Returns an object indicating whether prompt injection or jailbreak content was detected in the input text, along with a sanitized version of the text with malicious instructions removed or flagged.","failureModes":["Empty or missing 'text' parameter returns a 400 validation error","Very large payloads may exceed request size limits","False negatives possible for novel or obfuscated injection techniques","Service unavailability returns 5xx errors","Payment failure via x402 protocol returns 402 Payment Required"],"whenToPreferThis":"Choose this endpoint when your AI agent pipeline processes untrusted external content — scraped web pages, inbound emails, third-party API/MCP responses, or A2A payloads — before passing that content to an LLM or downstream agent. It is purpose-built for indirect prompt injection and jailbreak detection in agentic workflows, unlike general-purpose content moderation APIs that focus on harmful language rather than adversarial LLM manipulation.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T12:38:30.341Z","isFirstParty":false,"canonicalSlug":"prompt-guard-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-3e4a7f21"}