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A2A Indirect Prompt-Injection & Jailbreak Firewall
A2A Indirect Prompt-Injection & Jailbreak Firewall is a paid API for AI agents from sec-intel.agentdiet.dev, paid per call via MPP, $0.005/call, status unknown (last checked 2026-10-23).
Scans untrusted text, HTML, emails, MCP responses, or 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://sec-intel.agentdiet.dev/v1/mcp-injection-firewall)
Output
Returns a structured object containing the sanitized version of the input text with any detected prompt injection or jailbreak content removed or flagged, along with detection metadata indicating whether a threat was found.
Example use cases
Web scrape safety check for agents
“I'm about to feed this scraped HTML from an untrusted third-party site into my agent pipeline — can you scan it for any hidden prompt injections or adversarial instructions before we process it?”
Email body injection screening
“This email came from an unknown sender and I need my agent to summarize it — first run the body text through the injection firewall to make sure it doesn't contain any jailbreak attempts hidden in the content.”
MCP tool response sanitization
“My agent just got back a response from an external MCP tool I don't fully trust — can you check that response for any indirect prompt injection payloads and give me the clean version to work with?”
Technical details
Endpoint
POSThttps://sec-intel.agentdiet.dev/v1/mcp-injection-firewall?utm_source=zero.xyzWhen to prefer
Choose this endpoint when your AI agent is processing content from untrusted external sources — scraped web pages, inbound emails, third-party MCP/A2A tool responses, or user-submitted text — and you need a dedicated security firewall layer before passing that content into your agent's context window. Prefer this over generic content filters when you specifically need protection against indirect prompt injection and jailbreak techniques targeting LLM-based pipelines.
Side effects
- Empty or missing 'text' field returns a validation error
- Extremely large payloads may be rejected or truncated
- Service unavailability returns a 503 or payment-required 402 error if USDC balance is insufficient
- Ambiguous or highly obfuscated injections may not be detected with 100% accuracy
- Non-text binary content may fail to parse correctly
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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