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A2A Indirect Prompt-Injection & Jailbreak Firewall
A2A Indirect Prompt-Injection & Jailbreak Firewall is a paid API for AI agents from json-repair.agentdiet.dev, paid per call via MPP, $0.005/call, status unknown (last checked 2026-10-28).
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://json-repair.agentdiet.dev/v1/mcp-security)
Output
Returns a structured object indicating whether prompt injection or jailbreak payloads were detected in the input text, along with sanitized version of the content and details about any threats found.
Example use cases
Securing agent web scraping pipeline
“I need you to scan this raw HTML I just scraped from an untrusted site before passing it to the next agent — check it for any hidden prompt injections or jailbreak payloads embedded in the content.”
Validating incoming email for LLM processing
“Before you summarize this email I received, scan the full email body for any hidden prompt injection instructions that might try to hijack your behavior.”
Auditing MCP tool response before use
“This MCP tool just returned a response — can you run it through the injection firewall to make sure it doesn't contain any adversarial instructions trying to override your system prompt before I let you act on it?”
Technical details
Endpoint
GEThttps://json-repair.agentdiet.dev/v1/mcp-security?utm_source=zero.xyzWhen to prefer
Choose this endpoint when your AI agent pipeline processes untrusted external content — scraped web pages, user-submitted text, third-party API/MCP responses, or A2A agent messages — and you need to detect and strip hidden prompt injection or jailbreak payloads before that content reaches your LLM. Prefer this over generic content moderation 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 on novel obfuscated injection techniques
- Pagination cursor mismatch returns an error if cursor is invalid or expired
- Service may return 402 Payment Required if payment headers are missing
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| textrequired | string | Untrusted text, HTML, or tool output to scan for hidden prompt injection or jailbreak payloads |
| limit | integer | Maximum number of items to return per page (1-100) |
| cursor | string | Opaque pagination cursor for fetching the next page |
Output
Schema · Response
{
"type": "object"
}Reviews
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