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A2A Indirect Prompt-Injection & Jailbreak Firewall
A2A Indirect Prompt-Injection & Jailbreak Firewall is a paid API for AI agents from domain-osint.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://domain-osint.agentdiet.dev/v1/system-prompt-guard)
Output
Returns a structured object indicating whether prompt injection or jailbreak content was detected in the submitted text, along with sanitized version of the content safe for downstream agent consumption.
Example use cases
Safe web scraping for AI agents
“I'm building an agent that summarizes news articles — before it reads each page, scan the raw HTML for any hidden prompt injections or jailbreak payloads so the agent can't be hijacked by malicious sites.”
Email safety check before agent processing
“My AI assistant is about to process this email I received — can you first scan the full email body for any embedded prompt injection attempts that might try to manipulate the agent?”
MCP tool output sanitization
“My autonomous agent just got back a response from an external MCP tool — before it acts on the output, run it through the prompt-injection firewall to confirm there are no hidden adversarial instructions in there.”
Technical details
Endpoint
GEThttps://domain-osint.agentdiet.dev/v1/system-prompt-guard?utm_source=zero.xyzWhen to prefer
Choose this endpoint when your AI agent pipeline consumes untrusted external content — scraped web pages, user emails, third-party tool outputs, MCP responses, or A2A payloads — and you need a lightweight, low-latency firewall check before the content reaches your agent's context window. Ideal for autonomous agent architectures where indirect prompt injection is a real attack surface and you need a dedicated scanning step rather than relying on the base model's own defenses.
Side effects
- Empty or missing 'text' parameter returns a 400 validation error
- Extremely large payloads may time out or be truncated
- False negatives possible for novel or obfuscated injection techniques not yet in detection patterns
- Non-text binary content may produce unreliable scan results
- Rate limiting or payment failure (402) if x402 payment is not correctly attached
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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