{"uid":"cap_n5-SdTP7OLp4COE_nBqdN","slug":"hn-pulse-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-firewall-a87b8dff","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://hn-pulse.agentdiet.dev/v1/guard)","url":"https://hn-pulse.agentdiet.dev/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_Y291G_irPARwm6HiC7TMX","protocol":"mpp","methodType":"crypto","chain":"tempo","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":"hn-pulse.agentdiet.dev","brandSlug":"hn-pulse-agentdiet-dev-mpp","brandBaseUrl":"https://hn-pulse.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 this scraped web page content, run it through the prompt-injection firewall to check for any hidden jailbreak instructions or adversarial prompts embedded in the text: '<page content here>'.","exampleUseCases":[{"title":"Guarding agent from malicious web pages","prompt":"I'm about to feed this scraped webpage into my AI pipeline — can you first scan it for any hidden prompt injection attacks or jailbreak instructions buried in the HTML?"},{"title":"Sanitizing MCP tool responses","prompt":"Before my agent acts on this MCP tool response, run it through the prompt-injection firewall to make sure there are no adversarial instructions hidden inside it."},{"title":"Screening inbound emails for AI hijacking","prompt":"This email is going to be summarized by my AI agent — can you check it first for any indirect prompt injections or jailbreak payloads that might try to take over the agent's behavior?"}],"resultDescription":"Returns a structured object indicating whether prompt injection or jailbreak content was detected in the input text, along with sanitized/cleaned version of the text safe for downstream LLM consumption.","failureModes":["Empty or missing 'text' parameter returns a 400 validation error","Extremely long text inputs may be truncated or rejected","Payment required (HTTP 402) if USDC micropayment via x402 is not provided","False negatives possible for novel or obfuscated injection techniques","Non-UTF8 or binary content may cause parsing errors"],"whenToPreferThis":"Choose this endpoint when your AI agent is about to process content from untrusted external sources — scraped web pages, emails, third-party API responses, MCP tool outputs, or A2A payloads — and you need to detect and strip hidden prompt injection or jailbreak instructions before they reach your LLM. Prefer this over generic content filters when you specifically need adversarial-prompt detection in agentic pipelines.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T07:26:19.665Z","isFirstParty":false,"canonicalSlug":"hn-pulse-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-firewall-a87b8dff"}