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A2A Indirect Prompt-Injection & Jailbreak Firewall
A2A Indirect Prompt-Injection & Jailbreak Firewall is a paid API for AI agents from polymarket-odds.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://polymarket-odds.agentdiet.dev/v1/prompt-injection-shield)
Output
Returns a structured object indicating whether prompt injection or jailbreak content was detected, along with a sanitized version of the input text with any malicious instructions removed or neutralized.
Example use cases
Sanitizing scraped web content for agent pipeline
“I'm about to feed this scraped HTML from an external site into my AI pipeline — can you first check it for any hidden prompt injections or adversarial instructions and return the clean text?”
Checking email body for jailbreak attempts
“I just received this email that my agent is going to summarize — can you scan the body for any embedded jailbreak or prompt injection attacks before passing it along?”
Validating MCP tool response before LLM consumption
“My agent just got a response back from an external MCP tool — before I let the LLM read it, can you run it through the prompt injection firewall to make sure there's nothing malicious hidden in there?”
Technical details
Endpoint
GEThttps://polymarket-odds.agentdiet.dev/v1/prompt-injection-shield?utm_source=zero.xyzWhen to prefer
Choose this endpoint when your AI agent is about to consume content from untrusted external sources — scraped web pages, incoming emails, third-party MCP tool responses, or A2A agent payloads — and you need to detect and strip hidden prompt injection or jailbreak instructions before they reach your LLM. Prefer this over generic content filters when you specifically need LLM-focused adversarial input detection rather than general spam or malware scanning.
Side effects
- Empty or missing 'text' parameter returns a 400 validation error
- Extremely long inputs may be truncated or rejected
- False negatives are possible for novel or obfuscated injection patterns
- HTTP 402 Payment Required if x402 payment is not provided or insufficient
- Service unavailable errors (503) if the upstream firewall engine is down
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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