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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 injection 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/prompt-firewall)
Output
Returns a structured object indicating whether prompt injection or jailbreak content was detected in the input text, along with a sanitized version of the text safe for downstream LLM or agent consumption.
Example use cases
Screening scraped web content for agents
“I'm about to feed this scraped article into my research agent — can you scan it for hidden prompt injections first so it doesn't get hijacked?”
Sanitizing email before AI processing
“Before my email assistant reads and summarizes this incoming message, check it for any embedded prompt injection or jailbreak attempts hiding in the text.”
Validating MCP tool response safety
“My agent just got a response back from an external MCP tool — can you run it through the prompt firewall to make sure there are no adversarial instructions buried in it before we act on it?”
Technical details
Endpoint
GEThttps://onchain-risk.agentdiet.dev/v1/prompt-firewall?utm_source=zero.xyzWhen to prefer
Choose this endpoint when your AI agent pipeline ingests text from untrusted external sources — scraped web pages, user submissions, third-party API responses, emails, or MCP/A2A tool outputs — and you need to guard against indirect prompt injection attacks before that content reaches your LLM. Especially valuable in agentic workflows where compromised tool outputs could redirect agent behavior.
Side effects
- Empty or missing 'text' parameter returns a validation error
- Extremely large payloads may time out or be truncated
- Novel or obfuscated injection techniques may evade detection
- Non-text binary content may not be properly analyzed
- Payment failure via x402 results in HTTP 402 before scan is performed
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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