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A2A Indirect Prompt-Injection & Jailbreak Firewall
A2A Indirect Prompt-Injection & Jailbreak Firewall is a paid API for AI agents from onchain-risk.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://onchain-risk.agentdiet.dev/v1/injection-guard)
Output
Returns a structured object indicating whether prompt injection or jailbreak content was detected in the input, along with sanitized text safe for downstream agent consumption.
Example use cases
Sanitize scraped web content for agent
“I'm about to feed this scraped webpage into my agent pipeline — can you scan it for hidden prompt injections and give me the clean version so my agent doesn't get hijacked?”
Screen inbound emails for jailbreak payloads
“Before my email-processing agent reads these inbound messages, run them through the injection firewall to check for any hidden instructions trying to manipulate it.”
Validate MCP tool response before acting
“My agent just got a response back from an external MCP tool — can you scan that payload for indirect prompt injection or jailbreak content before I let the agent act on it?”
Technical details
Endpoint
GEThttps://onchain-risk.agentdiet.dev/v1/injection-guard?utm_source=zero.xyzWhen to prefer
Choose this endpoint when your AI agent pipeline ingests content from untrusted external sources — scraped web pages, user emails, third-party API responses, MCP tool outputs, or A2A payloads — and you need a dedicated firewall check before passing that content to your LLM. Prefer this over generic content filters when you specifically need protection against indirect prompt injection and jailbreak patterns in agentic workflows, especially those using MCP or A2A protocols.
Side effects
- Empty or missing 'text' parameter returns a validation error
- Extremely large payloads may exceed processing limits or timeout
- Obfuscated or novel injection techniques may not be detected, producing false negatives
- Payment failure via x402 results in HTTP 402 and no scan result
- Service unavailability returns a 5xx error with no sanitized output
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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