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A2A Indirect Prompt-Injection & Jailbreak Firewall
A2A Indirect Prompt-Injection & Jailbreak Firewall is a paid API for AI agents from 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://agentdiet.dev/v1/mcp-injection-firewall)
Output
Returns a structured object containing the sanitized version of the input text and indicators of whether prompt injection or jailbreak content was detected and removed.
Example use cases
Safe web scraping for AI agents
“I'm about to feed this scraped webpage content into my agent pipeline — can you first check it for any hidden prompt injections or adversarial instructions embedded in the HTML?”
Email safety screening for agent inbox
“My agent reads and acts on emails automatically. Before it processes this new message, scan the full email body for any jailbreak attempts or indirect prompt injection payloads hiding in the text.”
MCP tool output validation
“My agent just got back a response from an external MCP tool and I want to make sure it hasn't been tampered with — can you scan this tool output for hidden instructions trying to hijack the agent's behavior?”
Technical details
Endpoint
GEThttps://agentdiet.dev/v1/mcp-injection-firewall?utm_source=zero.xyzWhen to prefer
Choose this endpoint when your AI agent pipeline ingests content from untrusted external sources — web pages, emails, third-party APIs, MCP tools, or A2A messages — and you need to screen for adversarial prompt injection or jailbreak payloads before passing that content to your LLM. Ideal for autonomous agent workflows where content provenance cannot be guaranteed.
Side effects
- Empty or missing 'text' parameter returns a validation error
- Extremely large payloads may be rejected or truncated
- Obfuscated or encoded injections may evade detection
- Payment failure (HTTP 402) if x402 microtransaction is not completed
- Network timeout for very large or complex HTML inputs
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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