Agent Preflight
Budgeted agent preflight: allow|block|reuse|defer|advise. Never executes destination tools. Free MCP
Connect it
Settings → Connectors → Add custom connector
URL: https://api.agent-preflight.com/mcpSettings → Apps & Connectors → Advanced → Developer mode
Create connector with URL: https://api.agent-preflight.com/mcp{
"mcpServers": {
"agent-preflight": {
"url": "https://api.agent-preflight.com/mcp"
}
}
}claude mcp add --transport http agent-preflight https://api.agent-preflight.com/mcp{
"servers": {
"agent-preflight": {
"type": "http",
"url": "https://api.agent-preflight.com/mcp"
}
}
}2 tools, verified live
check_requestread-onlyValidate an HTTP API request body against a supplied JSON Schema before sending it. This tool does not execute the request. Use it when an agent needs to determine whether a proposed JSON body satisfies its expected schema. Optional economics adds proceed/abort advice from expected waste versus a $0.002 check.
preflight_tool_callread-onlyFree MCP decision for generic search:web_search or browse:fetch proposals only. Returns structuredContent and JSON text, never destination results. Caller supplies cost estimates, post-consultation budget and history, executes tools and retrieves resultReference itself. Reuse requires explicit permission, positive TTL and matching nonempty goal hashes; history must belong to the caller. estimated
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