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A2A Indirect Prompt-Injection & Jailbreak Firewall
A2A Indirect Prompt-Injection & Jailbreak Firewall is a paid API for AI agents from mcp-security.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://mcp-security.agentdiet.dev/v1/injection-guard)
Output
Returns a JSON object indicating whether a prompt injection or jailbreak payload was detected in the input text, along with a sanitized version of the text safe for downstream agent consumption.
Example use cases
Sanitizing scraped web content for agents
“I'm about to feed this scraped article into my AI pipeline — can you scan it for hidden prompt injections or adversarial instructions first and give me the sanitized version?”
Checking inbound email for jailbreak payloads
“Before my email-processing agent reads this customer message, run it through the prompt-injection firewall to make sure there are no hidden instructions trying to hijack my agent.”
Validating MCP tool response before acting
“My agent just got back a response from an external MCP tool — scan that response text for embedded jailbreak attempts or indirect prompt injections before I let the agent act on it.”
Technical details
Endpoint
GEThttps://mcp-security.agentdiet.dev/v1/injection-guard?utm_source=zero.xyzWhen to prefer
Use this endpoint when your AI agent is about to process any untrusted third-party content — scraped web pages, inbound emails, external API responses, MCP tool outputs, or A2A payloads — and you need a fast, per-call firewall check before allowing that content to influence agent behavior. Prefer this over generic text filters when you specifically need prompt-injection and jailbreak detection tailored for LLM agent pipelines.
Side effects
- Empty or missing 'text' parameter returns a validation error
- Extremely long inputs may be truncated or rejected
- Network timeout if the upstream scanning service is unavailable
- False negatives possible for novel or obfuscated injection techniques
- HTTP 402 Payment Required if the x402 micropayment is not provided or fails
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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