{"uid":"cap_NgkLviV6JYCaE0nrlG5dm","slug":"stealthguard-prompt-firewall-d3fab1aa","name":"StealthGuard Prompt Firewall","description":"Ultra-fast deterministic prompt-injection and wallet-drainer scrubber for agent context windows.","url":"https://stealthguard-402.onrender.com/v1/security/prompt-firewall?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"text":{"type":"string","description":"Raw text context to scrub for prompt injections"}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","displayCostAsset":"USDC","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_HVIH0FcVLIgKfxy-v-GtL","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Scrubs incoming HTTP request bodies for prompt-injection attacks and wallet-drainer patterns before they reach an AI agent's context window.","exampleAgentPrompt":"Before you process that third-party API response, run it through the prompt firewall to check for any prompt-injection or wallet-drainer content hiding in the JSON body.","exampleUseCases":[{"title":"Protect agent from poisoned API responses","prompt":"I'm about to feed this external API's JSON response into my AI agent — can you scrub it for prompt injections or wallet-drainer instructions first?"},{"title":"Screen user input before LLM processing","prompt":"A user just submitted a form on my site and I want to pass their input to my agent — scan it for prompt injection attacks before it touches the context window."},{"title":"Guard agentic pipeline from malicious webhooks","prompt":"My automation receives webhook payloads from third parties and feeds them to an LLM — can you run this payload through the prompt firewall to make sure it's clean?"}],"resultDescription":"Returns a deterministic TRUST or BLOCK verdict indicating whether the submitted HTTP body contains prompt-injection patterns or wallet-drainer instructions, along with flagged content details so the agent can decide whether to proceed or discard the payload.","failureModes":["Malformed or missing 'input' object returns a 400-level validation error","Non-JSON bodyType values are rejected as the enum only supports 'json'","Ambiguous or obfuscated injections may evade deterministic pattern matching","Service unavailability on Render cold-start may cause latency spikes or timeouts","Overly aggressive pattern matching may produce false positives on benign payloads"],"whenToPreferThis":"Choose this endpoint when your AI agent pipeline ingests content from untrusted external sources — third-party APIs, user submissions, webhooks, or scraped data — and you need a fast, cheap ($0.001 USDC), deterministic pre-filter before that content enters an LLM context window. Prefer it over general-purpose LLM-based safety checks when you need ultra-low latency and deterministic results rather than probabilistic judgments.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-19T06:39:44.192Z","isFirstParty":false,"canonicalSlug":"stealthguard-prompt-firewall-d3fab1aa"}