prompt protection API for AI agents

MCP Prompt Protection Server

MCP-compatible agents can discover Parse Agents tools, then call screening functions through the hosted remote MCP endpoint or use the REST API directly.

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When to call it

Trigger	Endpoint	MCP tool
Untrusted user input, RAG content, browser output, email, documents, webhook bodies, or tool results before an agent acts	`POST /v1/parse`	`screen_prompt`
LLM output before showing it to a user, storing it, or sending it to another tool or agent	`POST /v1/screen-output`	`screen_output`
A peer agent, plugin, or service asks for delegation or requests sensitive work	`POST /v1/agent/trust/verify`	`verify_agent_trust`
An agent has no bearer API key but can pay per request	`POST billable endpoints with x402`	`get_pricing`

Primary endpoint

POST /mcp

Claude Desktop and Claude Code

Cursor and Windsurf

Replit agents

Custom MCP clients

Signals Parse Agents checks

The hosted detector checks 9 risk categories with 107 deterministic pattern rules, structural analysis, optional LLM semantic analysis, and optional sandbox execution.

screen_prompt
screen_output
verify_agent_trust
get_pricing

Agent integration

POST https://www.parsethis.ai/mcp
Authorization: Bearer <key>
Content-Type: application/json

{"prompt":"untrusted text here","metadata":{"source":"tool_output"}}

No key? For billable REST endpoints, call without Authorization, read the 402 payment requirements, sign USDC on Base mainnet, and retry with payment-signature.