A2A Indirect Prompt-Injection & Jailbreak Firewall

Choose this endpoint when your AI agent needs to safely process untrusted external content — web pages, emails, tool outputs, or agent-to-agent payloads — before passing them to an LLM. Prefer this over generic input validation when the threat model specifically involves adversarial prompt injections or jailbreak strings embedded in otherwise benign-looking content. Especially useful in agentic pipelines where intermediate tool responses or scraped data feed directly into subsequent LLM calls.

• Empty or missing 'text' parameter returns a 400 validation error
• Extremely long payloads may be truncated or rejected
• Novel or obfuscated injection techniques may evade detection
• HTTP 402 Payment Required if x402 micropayment is not attached
• Service unavailability returns 5xx error
• Non-UTF-8 encoded content may not be parsed correctly