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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/prompt-injection-shield)
Output
Returns a JSON object containing the scan result, including whether a prompt injection or jailbreak payload was detected, and the sanitized version of the input text with adversarial instructions removed or flagged.
Example use cases
Shield agent from malicious web content
“I'm about to feed this scraped article into my agent pipeline — can you first scan it for hidden prompt injections or jailbreak instructions embedded in the text so we only pass the clean version downstream?”
Validate MCP tool response before use
“My agent just got a response back from an external MCP tool — before I let it act on that output, run it through the prompt-injection firewall to make sure there's nothing adversarial hidden in there.”
Screen inbound emails for LLM attacks
“I have this email that was forwarded to my AI assistant — can you check it for any indirect prompt injection attempts or jailbreak payloads before my agent reads and responds to it?”
Technical details
Endpoint
GEThttps://whale-momentum.agentdiet.dev/v1/prompt-injection-shield?utm_source=zero.xyzWhen to prefer
Choose this endpoint when your AI agent pipeline ingests content from untrusted external sources — web pages, emails, tool outputs, or third-party A2A/MCP payloads — before passing that content to an LLM for reasoning or action. It is specifically designed for agent-to-agent and MCP threat surfaces, unlike generic content moderation APIs that focus on human-generated harmful content rather than adversarial LLM manipulation techniques.
Side effects
- Empty or missing 'text' parameter returns a validation error
- Extremely large payloads may time out or be truncated
- Obfuscated injections using novel encoding techniques may evade detection
- Non-UTF8 or binary content may cause parsing errors
- HTTP 402 payment required if funds not provided via x402 protocol
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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