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A2A Indirect Prompt-Injection & Jailbreak Firewall
A2A Indirect Prompt-Injection & Jailbreak Firewall is a paid API for AI agents from whale-momentum.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 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://whale-momentum.agentdiet.dev/v1/guard)
Output
Returns a JSON object containing the scan result, including whether prompt injection or jailbreak content was detected and a sanitized version of the input text with malicious instructions removed or neutralized.
Example use cases
Sanitize scraped web content for agents
“I'm about to feed this scraped article text into my agent pipeline — can you run it through the prompt injection firewall first and return the clean version so no hidden instructions slip through?”
Guard agent from malicious email bodies
“This email came in from an unknown sender and my agent needs to read it — scan the body for any embedded jailbreak attempts or hidden prompt injections before it touches the LLM context.”
Validate MCP tool response before use
“My agent just got back a response from an external MCP tool and I'm not sure I trust the source — check that response text for any indirect prompt injection payloads and give me the sanitized output.”
Technical details
Endpoint
GEThttps://whale-momentum.agentdiet.dev/v1/guard?utm_source=zero.xyzWhen to prefer
Choose this endpoint when your AI agent pipeline ingests untrusted third-party content — web pages, emails, tool responses, or A2A payloads — and you need to strip hidden prompt injection or jailbreak instructions before those inputs reach your LLM context. It is particularly suited for agentic workflows where indirect prompt injection is a realistic threat vector, such as browsing-enabled agents, email-processing agents, or multi-agent systems consuming external MCP tool outputs.
Side effects
- Empty or missing 'text' parameter returns a validation error
- Extremely large payloads may exceed size limits and return a 400 or 413 error
- Service unavailability or payment failure (HTTP 402) if USDC balance is insufficient
- Ambiguous or highly obfuscated injections may be missed (false negatives)
- Non-text binary content passed as text may produce unreliable scan results
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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