{"uid":"cap_kqFgvGnNr_M0-uInsNnBA","slug":"sec-intel-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-7dcc7125","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://sec-intel.agentdiet.dev/v1/indirect-injection-guard)","url":"https://sec-intel.agentdiet.dev/v1/indirect-injection-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_-cax8V7jR_wyXfbJQAwEJ","protocol":"mpp","methodType":"crypto","chain":"tempo","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":"sec-intel.agentdiet.dev","brandSlug":"sec-intel-agentdiet-dev-mpp","brandBaseUrl":"https://sec-intel.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 this scraped web page, can you run it through the prompt injection firewall to check for any hidden instructions or jailbreak payloads embedded in it?","exampleUseCases":[{"title":"Guard agent from malicious webpage","prompt":"I just fetched the content from that third-party site — before you summarize it, please scan it for any hidden prompt injections or jailbreak instructions that might be trying to hijack you."},{"title":"Sanitize inbound email before processing","prompt":"This email came in from an unknown sender and I want my agent to parse it safely — can you run the body through the injection firewall first to make sure it's not trying to manipulate you?"},{"title":"Validate MCP tool response before use","prompt":"My MCP tool just returned this response but I don't fully trust the source — scan it for embedded prompt injection or jailbreak payloads before we use the data."}],"resultDescription":"Returns a sanitized version of the submitted text along with detection signals indicating whether hidden prompt injection or jailbreak content was found, allowing the agent to safely decide whether to use the cleaned payload.","failureModes":["Empty or missing 'text' parameter returns a 400 validation error","Extremely large payloads may be rejected or truncated","Payment failure (HTTP 402) if x402 micropayment is not resolved","False negatives are possible for novel or obfuscated injection techniques","Non-UTF-8 or binary content may not be processed correctly"],"whenToPreferThis":"Choose this endpoint when your AI agent pipeline ingests content from untrusted external sources — web pages, emails, MCP tool responses, or A2A payloads — and you need a dedicated security layer to detect and neutralize indirect prompt injection or jailbreak attempts before the content reaches your LLM context. Especially valuable in autonomous agent workflows where an attacker could embed adversarial instructions in content the agent fetches or receives.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T07:23:27.695Z","isFirstParty":false,"canonicalSlug":"sec-intel-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-63e04ebf"}