# Exactlane Preflight

Exactlane is the check before the call.

Exactlane Preflight produces caller-specific static compatibility evidence for autonomous agents before they rely on an external MCP capability.

## Use when
An agent has a caller-provided MCP capability snapshot and needs to determine whether that exact declared capability fits its own bounded workflow requirements.

## Scope
Static only. Evidence is computed from a caller-provided MCP capability snapshot. Live endpoint observation is disabled.

## Does not prove
- live availability
- full MCP conformance
- business-result correctness
- provider trust
- security certification
- payment success

Exactlane produces compatibility evidence only. The caller owns the operational decision.

## Public Agent Preview
Unauthenticated POST https://exactlane.dev/v0/public-access/grants issues short-lived scoped Preview access when enabled. The bearer token is disclosed only on the original 201; exact Idempotency-Key replay returns 200 without the token. See the public_access object in /.well-known/exactlane.json. Caller owns CONTINUE/UPDATE/HOLD. Live probing remains off. Disabled deployments return 403 PUBLIC_ACCESS_DISABLED.

## Machine contract
- https://exactlane.dev/.well-known/exactlane.json
- https://exactlane.dev/openapi.json
- /.well-known/exactlane.json
- /openapi.json
- /llms.txt

Canonical public discovery origin: https://exactlane.dev
Temporary migration hostname: https://preflight.happybitemochi.com