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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 2026-10-23).
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://polymarket-odds.agentdiet.dev/v1/llm-guard)
Output
Returns a JSON object containing the sanitized version of the input text with any detected prompt injection or jailbreak payloads neutralized, along with detection metadata indicating whether threats were found.
Example use cases
Safe web scraping for an AI agent
“I just scraped this article page for you to summarize, but first scan the raw HTML through the prompt-injection firewall to make sure there are no hidden adversarial instructions buried in it before you process it.”
Screening inbound emails before agent handling
“Before my agent replies to this customer email, run the full email body through the LLM guard to check whether it contains any prompt injection or jailbreak attempts hidden in the text.”
Validating third-party MCP tool output
“My agent just got a response back from an external MCP tool — can you scan that payload for hidden prompt injections before we pass it along to the next step in the workflow?”
Technical details
Endpoint
POSThttps://polymarket-odds.agentdiet.dev/v1/llm-guard?utm_source=zero.xyzWhen to prefer
Choose this endpoint when your AI agent needs to process untrusted external content — scraped web pages, inbound emails, third-party API or MCP responses, or A2A payloads — and must guard against indirect prompt injection or jailbreak attacks before that content influences downstream LLM behavior. It is especially valuable in multi-agent pipelines where one agent's output becomes another agent's input.
Side effects
- Empty or missing 'text' field returns a 400 validation error
- Extremely large payloads may time out or be truncated
- False negatives: sophisticated obfuscated injections may not be detected
- Payment failure via x402 returns 402 Payment Required
- Service unavailability returns 503
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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