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A2A Indirect Prompt-Injection & Jailbreak Firewall
A2A Indirect Prompt-Injection & Jailbreak Firewall is a paid API for AI agents from json-repair.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 injection 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://json-repair.agentdiet.dev/v1/tool-poisoning-shield)
Output
Returns a structured object indicating whether prompt injection or jailbreak content was detected in the input text, along with a sanitized version of the text safe for downstream LLM consumption.
Example use cases
Shield agent from poisoned web results
“I'm building an agent that scrapes Google results and summarizes them — before passing each page's text to the LLM, scan it for hidden prompt injections or jailbreak instructions so my agent can't be hijacked.”
Validate MCP tool response safety
“My agent just got back a response from an external MCP tool and I want to make sure it doesn't contain any embedded adversarial instructions trying to override my agent's behavior — can you run it through the prompt-injection firewall?”
Screen inbound emails for injection attacks
“Before my AI assistant reads and acts on this inbound customer email, check whether it contains any hidden prompt injection payloads or jailbreak attempts trying to manipulate the agent.”
Technical details
Endpoint
GEThttps://json-repair.agentdiet.dev/v1/tool-poisoning-shield?utm_source=zero.xyzWhen to prefer
Use this endpoint when your AI agent is about to consume content from untrusted external sources — web pages, emails, tool outputs, MCP responses, or A2A payloads — and you need to detect and strip hidden adversarial instructions before they reach your LLM. Prefer this over generic content filters when you specifically need prompt-injection and jailbreak detection tailored to agentic pipelines.
Side effects
- Empty or missing 'text' parameter returns validation error
- Extremely long payloads may be truncated or rejected
- Obfuscated or novel injection techniques may evade detection
- Non-textual binary content not supported
- Rate limiting or payment failure (x402) if micropayment not provided
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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