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A2A Indirect Prompt-Injection & Jailbreak Firewall
A2A Indirect Prompt-Injection & Jailbreak Firewall is a paid API for AI agents from company-enrich.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 content.
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://company-enrich.agentdiet.dev/v1/prompt-shield)
Output
Returns a JSON object containing the scan result for the submitted text, including whether prompt injection or jailbreak payloads were detected and a sanitized version of the input safe for downstream agent processing.
Example use cases
Shield agent from malicious email
“I'm about to let you process this email I received — can you first run it through the prompt-injection firewall to make sure it doesn't contain any hidden jailbreak instructions trying to manipulate you?”
Safe MCP tool response handling
“That MCP tool just returned a response with some weird-looking text in it — scan it for hidden prompt injections before you act on anything it says.”
Sanitize scraped web content
“I need you to summarize this scraped article, but first run the raw text through the prompt-shield scanner to strip out any adversarial instructions someone might have embedded in it.”
Technical details
Endpoint
GEThttps://company-enrich.agentdiet.dev/v1/prompt-shield?utm_source=zero.xyzWhen to prefer
Choose this endpoint when your agent is about to process content from untrusted external sources — scraped web pages, incoming emails, third-party API or MCP responses, or user-submitted text — and you need to detect and neutralize hidden prompt injections or jailbreak payloads before they reach your core LLM pipeline. Prefer it over generic content filters when the specific threat model is adversarial prompt manipulation targeting AI agents.
Side effects
- Empty or missing 'text' parameter returns a validation error
- Extremely long inputs may be truncated or rejected
- False negatives possible for novel or obfuscated injection techniques
- Service unavailable if payment (x402) fails or quota is exceeded
- Ambiguous or benign-looking injections may not be flagged with high confidence
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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