X402 Notary MCP vs PabloLec Keyprobe MCP
A side-by-side look at the X402 Notary MCP and PabloLec Keyprobe MCP MCP servers: transport, auth, tools, quality signals, and the config to install either one in Claude, Cursor, Windsurf or VS Code.
Verdict: choose X402 Notary MCP for security work as a local process; choose PabloLec Keyprobe MCP for security. You can also run both side by side in one mcpServers block.
Which MCP server should you choose?
Choose X402 Notary MCP when
- You need dedicated capabilities in the Security domain.
- You prefer a local stdio subprocess transport.
- You have the keys it needs:
WALLET_PRIVATE_KEY, NOTARY_RAIL, NOTARY_BASE_URL, SOLANA_PRIVATE_KEY. - You want tools like
notarize_inference, notarize_batch, verify_attestation.
Choose PabloLec Keyprobe MCP when
- You need dedicated capabilities in the Security domain.
Feature & specification comparison
Rows where the two servers differ are marked.
| Spec | ||
|---|---|---|
| Category | Security | Security |
| Quality signal | 63/100 · Good | 23/100 · Emerging |
| Install command | Confirmed | Not confirmed yet |
| Transport | Local subprocess (stdio) | — |
| Auth | Not declared | Not declared |
| Pricing | Not declared | Not declared |
| Required env vars | WALLET_PRIVATE_KEYNOTARY_RAILNOTARY_BASE_URLSOLANA_PRIVATE_KEY | None listed |
| Verified owner | Community listing | Community listing |
| GitHub stars | 0 | 0 |
| Directory activity | 2 views 0 installs 0 upvotes | 2 views 0 installs 0 upvotes |
| Tools | 6 | Not listed |
| Full listing | View X402 Notary MCP | View PabloLec Keyprobe MCP |
Tools & capabilities
X402 Notary MCP tools 6
notarize_inferenceGet a cryptographic receipt for one AI inference. Returns a signed Ed25519 attestation, sha256 content hash, and Merkle chain-anchor status for {prompt, response, model_id}. The notary does NOT store your prompt or response — only the hash is retained. Costs $0.001 USDC via x402 (requires WALLET_PRIVATE_KEY for a Base wallet).notarize_batchNotarize up to 20 AI inferences in one call — one signed attestation per record. Ideal for audit trails and agent pipelines. Costs $0.005 USDC via x402 (requires WALLET_PRIVATE_KEY for a Base wallet).verify_attestationFREE — verify any attestation issued by the notary. Supply the attestation_id plus either the original content ({prompt, response, model_id}) or its content_hash. Returns the Ed25519 signature check, hash comparison, and a Merkle inclusion proof once the batch is sealed. No wallet needed.get_receiptFREE — fetch the public receipt for an attestation: content hash, model, timestamps, Ed25519 signature, and Merkle anchor proof. Raw prompt/response are never stored, so receipts contain proof material only. No wallet needed.notary_statsFREE — live aggregate stats: total notarizations, 24h volume, top models by attestation count, sealed/anchored Merkle batches. No wallet needed.notary_pubkeyFREE — the notary's Ed25519 public key (base64, raw 32 bytes) for fully offline signature verification. No wallet needed.
PabloLec Keyprobe MCP tools
No tool names declared yet. Check the project README from the listing page.
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 Notary MCP
{
"mcpServers": {
"forgemeshlabs-x402-notary-mcp": {
"command": "npx",
"args": [
"-y",
"@forgemeshlabs/x402-notary-mcp"
],
"env": {
"WALLET_PRIVATE_KEY": "YOUR_WALLET_PRIVATE_KEY_HERE",
"NOTARY_RAIL": "YOUR_NOTARY_RAIL_HERE",
"NOTARY_BASE_URL": "YOUR_NOTARY_BASE_URL_HERE",
"SOLANA_PRIVATE_KEY": "YOUR_SOLANA_PRIVATE_KEY_HERE"
}
}
}
}
PabloLec Keyprobe MCP
No confirmed install command for PabloLec Keyprobe MCP yet — follow the setup steps linked from its listing page rather than a guessed package name.
Frequently asked questions
X402 Notary MCP is categorized under Security and uses a local stdio subprocess. PabloLec Keyprobe MCP belongs to Security and uses an install path we have not confirmed yet. Pick X402 Notary MCP for security work and PabloLec Keyprobe MCP for security.
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. PabloLec Keyprobe MCP has no confirmed install command yet — follow its own setup instructions.
X402 Notary MCP has no declared pricing — check the project's own site. PabloLec Keyprobe MCP has no declared pricing — check the project's own site. 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 forgemeshlabs-x402-notary-mcp and pablolec-keyprobe-mcp as separate keys in the same mcpServers object, and your assistant will call tools from either one.
On AllMCPs, X402 Notary MCP has a quality signal of 63/100 (Good) with 2 views, 0 installs and 0 GitHub stars. PabloLec Keyprobe MCP has 23/100 (Emerging) with 2 views, 0 installs and 0 GitHub stars.