INDIVIDUAL MCP TOOL

preflight_x402_endpoint

Preflight an x402 endpoint before paying it: one unpaid probe answering whether the URL serves a well-formed x402 v2 challenge a stock client could sign — 402 status, parseable PAYMENT-REQUIRED, signable accepts, testnet catch — with every check named and what a single probe cannot tell you.

scvd.storenone authenticationAvailability not checked

LIVE ENDPOINT

https://scvd.store/mcp/verifier

No auth detected

Connect to this endpoint to inspect the live schema for preflight_x402_endpoint and invoke it with your own arguments.

Indexed input schema

{}

Risk classification

Potential side effects detected · medium confidence · heuristic, not a guarantee.

A tool name or description suggests retrieving external content.
A tool name or description suggests a financial action.

Parent server

scvd.store

CONNECT WITH APPROVAL

Client installation

Review this server and its permissions before adding it. Secret placeholders must be set locally.

Codex

~/.codex/config.toml

[mcp_servers.scvd-x402-verifier]
url = "https://scvd.store/mcp/verifier"
enabled = true

Claude Code

.mcp.json

{
  "mcpServers": {
    "scvd-x402-verifier": {
      "type": "http",
      "url": "https://scvd.store/mcp/verifier"
    }
  }
}

Claude Desktop

Settings → Connectors → Add custom connector

Name: scvd-x402-verifier
Remote MCP URL: https://scvd.store/mcp/verifier

Add this remote URL as a custom connector in Claude Desktop. Availability depends on the user plan and workspace policy.

Cursor

.cursor/mcp.json

{
  "mcpServers": {
    "scvd-x402-verifier": {
      "url": "https://scvd.store/mcp/verifier"
    }
  }
}

Visual Studio Code

.vscode/mcp.json

Add to Visual Studio Code

{
  "servers": {
    "scvd-x402-verifier": {
      "type": "http",
      "url": "https://scvd.store/mcp/verifier"
    }
  }
}

Generic MCP

Client-specific MCP configuration

{
  "name": "scvd-x402-verifier",
  "transport": "streamable-http",
  "url": "https://scvd.store/mcp/verifier"
}

MCP Inspector

Run the official MCP Inspector locally and enter the indexed Streamable HTTP endpoint.

Related tools

verify_x402_receipt — Verify an x402 signed receipt or offer from any issuer: structure, signature against the issuer's key (pass public_key_hex for a fully offline check; otherwise the did:web key is resolved), liveness.
lookup_endpoint_readiness — Read what the signed weekly x402 readiness corpus holds about one host: rounds probed of rounds since first sighting, the last signed verdict, the tier with its fraction, the gaps counted against the observer.
get_defect_definition — The definition of one named x402 defect class from the store's registered vocabulary: what a clear door asserts, what a buyer loses when it is present, whether it is detectable without paying, which check reports it, and what observation would disprove it.
verify_scvd_artifact — Verify a certificate, stamp or anchor id this store issued: the exact signed bytes and the ed25519 key, so the check can be repeated offline.