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A2A Indirect Prompt-Injection & Jailbreak Firewall
A2A Indirect Prompt-Injection & Jailbreak Firewall is a paid API for AI agents from token-intel.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://token-intel.agentdiet.dev/v1/indirect-injection-guard)
Output
Returns a structured object containing the sanitized version of the input text with any detected prompt injection or jailbreak payloads removed or flagged, along with threat detection signals indicating whether malicious content was found.
Example use cases
Guarding agent from malicious web scrapes
“I'm about to feed this scraped article into my AI pipeline — can you first check it for any hidden prompt injection or jailbreak payloads and return only the safe, sanitized text?”
Screening inbound emails for injection attacks
“This email came in from an unknown sender and my agent is going to summarize it — please scan the email body for any embedded jailbreak instructions before it touches my LLM.”
Validating MCP tool responses before use
“My agent just got this response back from an external MCP tool — run it through the prompt injection firewall to make sure there are no adversarial instructions hidden in it before I act on it.”
Technical details
Endpoint
GEThttps://token-intel.agentdiet.dev/v1/indirect-injection-guard?utm_source=zero.xyzWhen to prefer
Choose this endpoint when your AI agent is processing untrusted external content — scraped web pages, inbound emails, third-party API or MCP tool responses, or A2A payloads — before passing that content to an LLM. It is specifically designed for the indirect prompt injection threat vector (attacker-controlled content reaching your agent) rather than direct user input filtering.
Side effects
- Empty or missing 'text' parameter returns a validation error
- Extremely long inputs may be truncated or rejected
- False negatives possible if novel injection techniques are used
- False positives may strip legitimate instructional content that resembles injection patterns
- Network timeout or 402 payment failure if micropayment is not properly handled
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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