Observed arrival · 2026-09-18
Agent Preflight: A Gate Before the Tool Call
A developer API evaluates proposed search or browse calls and returns allow, block, reuse, defer, or advise before an agent spends the request.
- For
- Developers building budgeted tool-using agents
- Worth noticing
- It distinguishes an actionable decision from the separate $0.001 HTTP charge and offers unpaid check and MCP endpoints.
Field notes
The service accepts structured intent and context rather than executing the requested operation itself. Its checks cover estimated external and model costs, recent history fingerprints, retry limits, and optional reuse or scope-reduction capabilities. The homepage identifies two supported operation types and separates the paid production endpoint from unpaid /check-request and MCP routes. Privacy notes say analytics retains one-way hashes while excluding raw request bodies, schemas, URLs, and identifiers.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
One card from the complete issue