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A2A Indirect Prompt-Injection & Jailbreak Firewall
A2A Indirect Prompt-Injection & Jailbreak Firewall is a paid API for AI agents from defi-yield.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://defi-yield.agentdiet.dev/v1/guard)
Output
Returns a structured object containing the sanitized version of the input text with any detected prompt injection or jailbreak payloads flagged or removed, allowing the agent to safely consume the cleaned content.
Example use cases
Guarding agent against malicious web content
“I just scraped this article from an untrusted site and want to feed it to you for summarization — but first, can you run it through the prompt injection firewall to make sure there are no hidden instructions embedded in the text?”
Sanitizing MCP tool responses before use
“This MCP server just returned a response and I'm not sure I trust it — can you scan the payload for any embedded jailbreak attempts or adversarial prompt injections before we act on the data?”
Checking inbound emails for prompt injection
“We're building an agent that processes customer emails automatically — can you scan this email body for hidden prompt injection attacks before the agent reads and acts on it?”
Technical details
Endpoint
GEThttps://defi-yield.agentdiet.dev/v1/guard?utm_source=zero.xyzWhen to prefer
Choose this endpoint when your AI agent needs to process content from untrusted external sources — web pages, emails, third-party API responses, MCP tool outputs, or A2A payloads — before incorporating that content into its reasoning chain. It is specifically designed for agentic pipelines where indirect prompt injection is a live threat vector, and it supports x402 micropayment and MCP/A2A protocols natively, making it a drop-in safety layer for autonomous agent workflows.
Side effects
- Empty or missing 'text' parameter returns a validation error
- Extremely large payloads may time out or be truncated
- Payment failure (HTTP 402) if x402 micropayment is not properly attached
- Ambiguous or borderline injections may not be detected with full confidence
- Non-textual binary content cannot be meaningfully scanned
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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