X402 Discovery MCP vs SCRIPTMASTERLABS — GhostKey
A side-by-side look at the X402 Discovery MCP and SCRIPTMASTERLABS — GhostKey MCP servers: transport, auth, tools, quality signals, and the config to install either one in Claude, Cursor, Windsurf or VS Code.
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SCRIPTMASTERLABS — GhostKeyAggregators · Remote HTTP/SSECompliant pay-per-use MCP infrastructure for autonomous agents: one discovery surface for web retrieval, compute, market telemetry, document extraction, research and other authorized capabilities, with x402-paid execution where applicable.75GreatAuth: no auth requiredVerdict: choose X402 Discovery MCP for aggregators work as a local process; choose SCRIPTMASTERLABS — GhostKey for aggregators over a hosted endpoint. You can also run both side by side in one mcpServers block.
Which MCP server should you choose?
Choose X402 Discovery MCP when
- You need dedicated capabilities in the Aggregators domain.
- You prefer a local stdio subprocess transport.
- Its auth model fits you: API key required.
- You want tools like
x402_discover, x402_health, x402_register.
SChoose SCRIPTMASTERLABS — GhostKey when
- You need dedicated capabilities in the Aggregators domain.
- You prefer a remote HTTP/SSE transport.
- Its auth model fits you: No auth required.
- You want tools like
ghostkey_status, ghostkey_catalog, ghostkey_quote.
Feature & specification comparison
Rows where the two servers differ are marked.
| Spec | S SCRIPTMASTERLABS — GhostKey | |
|---|---|---|
| Category | Aggregators | Aggregators |
| Quality signal | 53/100 · Good | 75/100 · Great |
| Install command | Confirmed | Confirmed |
| Transport | Local subprocess (stdio) | Remote HTTP/SSE |
| Auth | API key required | No auth required |
| Pricing | Freemium | Freemium |
| Required env vars | None listed | None listed |
| Verified owner | Community listing | Verified |
| GitHub stars | 4 | — |
| Directory activity | 2 views 0 installs 0 upvotes | 0 views 0 installs 0 upvotes |
| Tools | 9 | 10 |
| Full listing | View X402 Discovery MCP | View SCRIPTMASTERLABS — GhostKey |
Tools & capabilities
X402 Discovery MCP tools 9
x402_discoverSemantic search across the live catalog by keyword, category, max pricex402_healthReal-time uptime + latency check for any registered servicex402_registerRegister a new x402 service (HTTPS-only, rate-limited)x402_attestERC-8004 trust score and reputation signals for a servicex402_scanFull x402 compliance scan: live config, trust score, mismatch detectionscout_routeDiscover best service for an intent + execute x402 paymentscout_discoverQuery discovery catalog without executingscout_executeExecute x402 payment to a known service URLscout_auditView agent spend log and budget status
SCRIPTMASTERLABS — GhostKey tools 10
ghostkey_statusReport GhostKey server status and check whether configured ScriptMasterLabs authorities are reachable. Unknown stays unknown; no health result is fabricated.ghostkey_catalogList the capabilities actually exposed by this GhostKey MCP server and identify staged families without pretending they are callable.ghostkey_quoteExplain how to obtain authoritative pricing for a GhostKey/SML paid capability. Pricing and settlement destination come from the fresh live HTTP 402 challenge, never a copied wallet or stale fixed price.ghostkey_policyReturn GhostKey's operating, payment, upstream-rights, browser-session, and trusted-device policy for autonomous agents.ghostkey_device_pairing_createCreate a one-time trusted-device enrollment capability. Requires GhostKey persistent trusted-device storage to be configured. The browser generates its own non-exportable P-256 private key; only the public key is uploaded.ghostkey_device_pairing_statusResolve a one-time trusted-device pairing after the browser has enrolled. Requires the original pairing ID and pairing code and is available only until that pairing capability expires.ghostkey_session_createCreate a short-lived, origin-scoped browser delegation session. Optionally target a previously enrolled trusted device using its private 256-bit routing capability so its extension can claim the session automatically. The user still handles login/CAPTCHA and any new browser-origin permission themselves.ghostkey_session_statusCheck whether a scoped GhostKey browser session is alive and whether its user-controlled browser bridge has a fresh heartbeat.ghostkey_session_actionRelay one authorized browser action into the user's already-authenticated browser. Actions: navigate, inspect, click, input, select, read, wait. Password/hidden fields and off-allowlist navigation are denied. API and bridge documentation: https://ghostkey-mcp.onrender.com/session-bridge/README.txt.ghostkey_session_revokeImmediately revoke a GhostKey browser delegation session and cancel queued work.
Ready-to-paste client configs
Paste either block (or both) into your client config, e.g. claude_desktop_config.json or ~/.cursor/mcp.json. We only show a config when the install command is confirmed.
X402 Discovery MCP
{
"mcpServers": {
"rplryan-x402-discovery-mcp": {
"command": "uvx",
"args": [
"x402-payment-harness"
]
}
}
}
SCRIPTMASTERLABS — GhostKey
{
"mcpServers": {
"scriptmasterlabs-ghostkey": {
"url": "https://ghostkey-mcp.onrender.com/mcp"
}
}
}
Frequently asked questions
X402 Discovery MCP is categorized under Aggregators and uses a local stdio subprocess. SCRIPTMASTERLABS — GhostKey belongs to Aggregators and uses a remote HTTP/SSE transport. Pick X402 Discovery MCP for aggregators work and SCRIPTMASTERLABS — GhostKey for aggregators.
Copy the mcpServers block from the config section on this page into your client's config (for example claude_desktop_config.json or ~/.cursor/mcp.json), then fully restart the client.
X402 Discovery MCP is listed as freemium — a free tier with paid plans. Auth: api key required. SCRIPTMASTERLABS — GhostKey is listed as freemium — a free tier with paid plans. Auth: no auth required. If a server needs environment variables such as API keys, define them under the env key in your client's MCP config.
Yes. MCP clients support multiple servers: add rplryan-x402-discovery-mcp and scriptmasterlabs-ghostkey as separate keys in the same mcpServers object, and your assistant will call tools from either one.
On AllMCPs, X402 Discovery MCP has a quality signal of 53/100 (Good) with 2 views, 0 installs and 4 GitHub stars. SCRIPTMASTERLABS — GhostKey has 75/100 (Great) with 0 views, 0 installs and 0 GitHub stars.