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A2A Indirect Prompt-Injection & Jailbreak Firewall
A2A Indirect Prompt-Injection & Jailbreak Firewall is a paid API for AI agents from workflows.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://workflows.agentdiet.dev/v1/prompt-firewall)
Output
Returns a JSON object containing the scan result for the submitted text, including whether a prompt injection or jailbreak payload was detected and a sanitized version of the input text with malicious instructions removed.
Example use cases
Protect agent from malicious web scrapes
“I just scraped this webpage to feed into my AI pipeline — can you scan it for any hidden prompt injection or jailbreak payloads before I pass it along? Here's the raw HTML content.”
Sanitize inbound email for AI processing
“Before my agent summarizes this inbound customer email, run it through the prompt-injection firewall — I want to make sure there are no hidden instructions embedded in it that could hijack the agent.”
Validate MCP tool response safety
“My agent just got a response back from an external MCP server tool call. Can you check this response text for indirect prompt injections or adversarial instructions before my agent acts on it?”
Technical details
Endpoint
GEThttps://workflows.agentdiet.dev/v1/prompt-firewall?utm_source=zero.xyzWhen to prefer
Choose this endpoint when your AI agent is about to process content from untrusted external sources — web pages, emails, MCP tool responses, or A2A agent payloads — and you need to detect or strip hidden prompt injections and jailbreak attempts before the content reaches your LLM. Prefer this over generic content filters when the specific threat model is adversarial AI manipulation rather than general moderation.
Side effects
- Empty or missing 'text' parameter returns a validation error
- Extremely long payloads may exceed request limits or timeout
- Obfuscated or novel injection patterns may not be detected
- Non-text binary content may not be scannable
- Payment failure via x402 returns 402 status blocking the request
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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