Official MCP RegistryListed
Agent Preflight
Budgeted agent preflight: allow|block|reuse|defer|advise. Never executes destination tools. Free MCP
First seen 2 Oct 2026. Evidence as of 6 Oct 2026.
2
Tools
From an anonymous probe
1
Source listings
Each with its own history
3
Recorded changes
Since first seen
Tools
| Tool | Description | Behaviour |
|---|---|---|
| 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. | Read-only |
| 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 | Read-only |
Change history
- preflight_tool_call: description changed (+"$0.002" -"$0.001")
- check_request: input schema changed
- check_request: description changed (+"$0.002" -"$0.001")
| Source | Listing | First seen | Last seen | Versions |
|---|---|---|---|---|
| Official MCP Registry | com.agent-preflight/agent-preflight | 2 Oct 2026 | 6 Oct 2026 | 1 |