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A2A Indirect Prompt-Injection & Jailbreak Firewall
A2A Indirect Prompt-Injection & Jailbreak Firewall is a paid API for AI agents from mcp-compiler.agentdiet.dev, paid per call via MPP, $0.005/call, status unknown (last checked 2026-10-21).
Scans untrusted text, HTML, emails, MCP responses, or A2A payloads for hidden prompt injections and jailbreak attempts, returning sanitized content.
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://mcp-compiler.agentdiet.dev/v1/tool-poisoning-shield)
Output
Returns a sanitized version of the input text with any detected prompt injection or jailbreak payloads flagged and/or removed, along with metadata indicating whether malicious content was found.
Example use cases
Shield agent from poisoned web scrape
“I just scraped this webpage to feed into our research agent — can you check it for any hidden prompt injections or adversarial instructions embedded in the HTML before we pass it along?”
Screen inbound A2A tool response
“Our agent just got a response back from an external MCP tool. Can you run this payload through the prompt-injection firewall to make sure it's not trying to hijack the agent's behavior?”
Protect LLM from malicious user input
“A user submitted this free-text field in our app and we want to pass it to our LLM — can you scan it first to catch any jailbreak attempts or embedded instructions trying to override the system prompt?”
Technical details
Endpoint
GEThttps://mcp-compiler.agentdiet.dev/v1/tool-poisoning-shield?utm_source=zero.xyzWhen to prefer
Use this endpoint when your AI agent or pipeline processes untrusted external content — web pages, emails, MCP/A2A tool responses, user inputs — and you need to detect or neutralize indirect prompt injection and jailbreak attempts before they reach an LLM. Prefer this over generic content filters when you specifically need agent-oriented security that understands prompt injection attack patterns, not just spam or malware.
Side effects
- Empty or missing 'text' parameter returns a validation error
- Extremely large payloads may be truncated or rejected
- False negatives are possible for novel or obfuscated injection techniques
- Service unavailability may return a 402 or 5xx error
- Very short or benign text may return a pass-through with no changes
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"
}Reviews
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