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A2A Indirect Prompt-Injection & Jailbreak Firewall
A2A Indirect Prompt-Injection & Jailbreak Firewall is a paid API for AI agents from mesh.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://mesh.agentdiet.dev/v1/indirect-injection-guard)
Output
Returns a structured object indicating whether prompt injection or jailbreak content was detected, along with sanitized version of the input text with malicious payloads removed or flagged.
Example use cases
Safe web scraping for agent pipelines
“I just scraped this product page HTML to feed into my agent — can you scan it for any hidden prompt injections or adversarial instructions before I pass it along?”
Screening inbound email before agent processing
“This email came in from an unknown sender and my agent is going to summarize it — please check the full email body for any embedded jailbreak attempts or indirect prompt injections first.”
Validating MCP tool response before use
“My agent just got back a response from an external MCP tool — can you run it through the injection firewall to make sure it doesn't contain any hidden instructions trying to hijack the agent?”
Technical details
Endpoint
GEThttps://mesh.agentdiet.dev/v1/indirect-injection-guard?utm_source=zero.xyzWhen to prefer
Choose this endpoint when your AI agent pipeline processes content from untrusted external sources — scraped web pages, inbound emails, third-party API responses, MCP tool outputs, or user-submitted text — and you need to guard against indirect prompt injection or jailbreak attacks before that content influences agent behavior. It is especially valuable in agentic workflows where LLM outputs feed directly into subsequent actions.
Side effects
- Empty or missing 'text' parameter returns a 400 validation error
- Very large payloads may exceed input limits or increase latency
- Sophisticated obfuscated injections may evade detection (false negatives)
- Payment failure via x402 results in 402 response blocking the scan
- Non-text binary content may produce unreliable results
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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