Agent Preflight

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V0.3: V0.1 validates a proposed HTTP body against JSON Schema. POST /v0.2/preflight/tool-call returns allow|block|reuse|defer|advise for a budgeted tool call without executing it. Production charges $0.002 USDC per HTTP POST on Base mainnet (eip155:8453) via x402 when payment env is enabled. MCP and /check-request stay unpaid.

AIBasex402 v2exactagent-preflight.com ↗︎

Settled via Coinbase.

Transactions · 30d
1
Volume · 30d
$0.002
Unique buyers · 30d
2
Uptime · 30d
100.0%
Latency p50
27ms
Reported calls · 30d
1

Endpoints (1 live)

  • POST /v0.2/preflight/tool-call — Pre-execution decision for a metered search or browse tool call. Evaluates the proposal; does not execute the external tool. (0.001 USDC on Base)

MCP tools (2)

agent-preflight https://api.agent-preflight.com/mcp

  • check_request — Validate 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_call — Free 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 fees/savings are hypothetical, not receipts; confidence is not calibrated. Paid HTTP is a separate $0.002 per settled POST interface. Full contract: https://agent-preflight.com/docs

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