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A2A Indirect Prompt-Injection & Jailbreak Firewall
A2A Indirect Prompt-Injection & Jailbreak Firewall is a paid API for AI agents from x402broker.com, 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://x402broker.com/v1/mcp-injection-firewall)
Output
Returns a JSON object containing the sanitized version of the submitted text with any detected prompt injection or jailbreak payloads neutralized, along with detection signals indicating whether malicious content was found.
Example use cases
Securing agent web browsing pipeline
“I need you to scan this HTML I just fetched from an external site — check it for any hidden prompt injections or jailbreak payloads before you summarize it for me.”
Validating MCP tool response safety
“Before you act on that MCP tool response, run it through the injection firewall to make sure there are no adversarial instructions embedded in it trying to hijack your behavior.”
Screening inbound emails for AI manipulation
“Can you check this email body for hidden prompt injection attempts? Someone might be trying to manipulate you through it — sanitize it first before you extract any action items.”
Technical details
Endpoint
GEThttps://x402broker.com/v1/mcp-injection-firewall?utm_source=zero.xyzWhen to prefer
Choose this endpoint when your AI agent pipeline ingests text from untrusted external sources — scraped web pages, emails, MCP tool responses, or A2A payloads — and you need to detect and neutralize hidden prompt injection or jailbreak attempts before processing. Especially valuable in agentic workflows where LLMs act autonomously on external content and are vulnerable to indirect prompt injection attacks.
Side effects
- Empty or missing 'text' parameter returns a validation error
- Extremely long payloads may be truncated or rejected
- False negatives possible for novel or obfuscated injection techniques
- Service unavailability or payment failure returns HTTP 402 or 5xx
- Highly encoded or multi-language injections may evade detection
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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