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AgentDiet LLM Guard — Prompt Injection & Jailbreak Firewall
x402
AgentDiet LLM Guard — Prompt Injection & Jailbreak Firewall is a paid API for AI agents from agentdiet.dev, paid per call via x402 or MPP, $0.005/call, status unknown (last checked 2026-10-20).
Scans untrusted text (web pages, emails, MCP responses, A2A payloads) for hidden prompt injections and jailbreak attempts, returning sanitized output.
Price / call$0.005
Success—
StatusUnknown
How this service works
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://agentdiet.dev/v1/llm-guard)
Output
Returns sanitized text with hidden prompt injections stripped out, along with threat detection signals indicating whether injection or jailbreak content was found in the input.
Example use cases
Screen scraped web content for agent
“I'm about to feed this web page's text into my AI pipeline — can you run it through the prompt injection firewall first to make sure there are no hidden instructions trying to hijack my agent?”
Validate incoming A2A payload
“Before my agent acts on this A2A response from a third-party service, scan it for any embedded jailbreak or prompt injection attempts and give me the sanitized version.”
Filter user-submitted email for LLM processing
“A user just forwarded this email for my AI to summarize, but I'm worried it might contain hidden prompt injections — can you check it and return the clean text?”
Technical details
Endpoint
GEThttps://agentdiet.dev/v1/llm-guard?utm_source=zero.xyzWhen to prefer
Use this endpoint when your AI agent needs to process untrusted third-party content — web pages, emails, tool responses, or agent-to-agent messages — before feeding it into an LLM. It is specifically designed for indirect prompt injection threats in agentic pipelines, making it preferable to generic content filters when the attack surface is LLM manipulation rather than spam or malware.
Side effects
- Empty or missing 'text' query parameter returns an error
- Extremely long payloads may be truncated or rejected
- Obfuscated or encoded injections may evade detection
- Non-text binary content will not be parsed correctly
- Rate limits may apply; repeated identical calls may be throttled
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| textrequired | string | Untrusted text, HTML, or tool output to scan for hidden prompt injection or jailbreak payloads |
Output
Schema · Response
{
"type": "object"
}Tags
x402
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