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A2A Indirect Prompt-Injection & Jailbreak Firewall
A2A Indirect Prompt-Injection & Jailbreak Firewall is a paid API for AI agents from shopify-spy.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://shopify-spy.agentdiet.dev/v1/prompt-shield)
Output
Returns a structured object indicating whether the input text contains prompt injection or jailbreak payloads, along with sanitized/cleaned text safe for AI consumption.
Example use cases
Protecting agent from malicious web scrapes
“I'm building an agent that browses the web and summarizes pages — before passing any scraped HTML to the LLM, scan it for hidden prompt injections or jailbreak instructions so my agent doesn't get hijacked.”
Screening MCP tool responses for injection
“My agent just got a response from an external MCP tool and I'm worried it might contain adversarial instructions embedded in the output — can you scan this payload for prompt injection attempts before I let the agent act on it?”
Validating inbound emails before AI processing
“I have an AI email assistant that reads and replies to my inbox — before it processes this incoming email, check the full email body for any hidden prompt injection or jailbreak content that could manipulate the assistant.”
Technical details
Endpoint
GEThttps://shopify-spy.agentdiet.dev/v1/prompt-shield?utm_source=zero.xyzWhen to prefer
Choose this endpoint when your AI agent pipeline ingests untrusted external content — web scrapes, emails, third-party tool outputs, MCP responses, or A2A payloads — and you need a dedicated firewall step before that content reaches your LLM context. Prefer this over generic content filtering when your threat model specifically includes indirect prompt injection and jailbreak attempts targeting agent behavior.
Side effects
- Empty or missing 'text' parameter returns a 400 validation error
- Extremely large payloads may be rejected or time out
- Obfuscated or highly novel injection techniques may not be detected
- Payment not settled via x402 results in HTTP 402 response blocking the scan
- Ambiguous borderline content may produce false positives or false negatives
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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