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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 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://shopify-spy.agentdiet.dev/v1/mcp-injection-firewall)
Output
Returns a sanitized version of the input text with prompt injection and jailbreak payloads removed or flagged, along with detection metadata indicating whether malicious content was found and what was identified.
Example use cases
Sanitize scraped web content for agent pipeline
“I'm about to feed this scraped webpage content into my AI agent — can you first scan it for hidden prompt injections or adversarial instructions embedded in the HTML?”
Screen incoming emails before LLM processing
“Before my agent reads and replies to this email, check the full email body for any jailbreak attempts or indirect prompt injection payloads hiding in the text.”
Validate MCP tool response before agent acts
“My agent just got back a response from an external MCP tool — can you scan that response for hidden prompt injections before I let the agent use it to take any actions?”
Technical details
Endpoint
GEThttps://shopify-spy.agentdiet.dev/v1/mcp-injection-firewall?utm_source=zero.xyzWhen to prefer
Choose this endpoint when your AI agent is about to process text, HTML, or structured payloads retrieved from untrusted external sources — especially web scraping results, user-submitted content, third-party API responses, or MCP/A2A tool outputs — and you need to detect and strip adversarial prompt injections before they reach your LLM context. Particularly valuable in agentic pipelines where tool outputs could contain hidden instructions targeting the agent.
Side effects
- Empty or missing 'text' parameter returns a validation error
- Extremely long payloads may be truncated or rejected
- Obfuscated injections using novel encoding may evade detection
- Service may return a 402 Payment Required if micropayment is not provided
- Network timeout for very large HTML documents
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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