SpendPreflight

npx add-mcp 'https://api.spendpreflight.com/mcp'

A small, explicit decision between a payment quote and a signature.

Operator-maintained documentation
Live features and staging previews are distinguished. Index coverage is not yet available.

Choose a starting point

Use HTTP for a direct screening call, MCP for an assistant tool, or the local SDK guard in the payment path. No SpendPreflight caller account, API key or OAuth is required. An agent still needs its own wallet and payment authorization to pay.

Three outcomes

Allow: proceed only within your policy. Hold: ask a human or explicit policy authority. Block: stop. A model deciding to call a screening tool does not enforce these outcomes; put the guard before signing.

Availability in this documentation

HTTP checks, signed preflight decisions, MCP and npm 0.2.0 are live. The Index interface and rules are deployed, but the crawler is disabled pending capacity checks: missing evidence stays unknown. Scout and Verified Seller remain staging previews. Python is not published on PyPI.

Public prices

Route	Price	Purpose
GET /v1/check	$0.01	Wallet/name screening and domain signals
POST /v1/preflight	$0.02	Allow, hold or block plus reasons
GET /v1/endpoint	$0.005 · requires fresh indexed data	Cached unpaid endpoint observations
get_service_info / health / sample	Free	Reference and service state