Server data from the Official MCP Registry
Neutral third-party witness: independently fetch, hash, timestamp, archive any URL or API response.
About
Neutral third-party witness: independently fetch, hash, timestamp, archive any URL or API response.
Security Report
Valid MCP server (2 strong, 4 medium validity signals). No known CVEs in dependencies. Package registry verified. Imported from the Official MCP Registry.
3 files analyzed · 1 issue found
Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.
Permissions Required
This plugin requests these system permissions. Most are normal for its category.
What You'll Need
Set these up before or after installing:
Environment variable: WITNESSD_URL
Environment variable: EVM_PRIVATE_KEY
Environment variable: WITNESSD_API_KEY
How to Install
Add this to your MCP configuration file:
{
"mcpServers": {
"vip-witnessd-witnessd": {
"env": {
"WITNESSD_URL": "your-witnessd-url-here",
"EVM_PRIVATE_KEY": "your-evm-private-key-here",
"WITNESSD_API_KEY": "your-witnessd-api-key-here"
},
"args": [
"-y",
"witnessd-mcp"
],
"command": "npx"
}
}
}Documentation
View on GitHubFrom the project's GitHub README.
witnessd-mcp
MCP server for witnessd — a neutral third-party witness for the machine-readable web.
Give your agent the ability to create tamper-evident evidence: witnessd independently fetches any public URL or API endpoint, hashes and timestamps the response, archives it, and issues a signed certificate. Snapshot hashes are Merkle-batched hourly and anchored on Base, so certificates verify forever — by anyone, without trusting the operator.
Use it before transacting with a counterparty ("witness their published price/terms"), before acting on third-party data ("witness what the API returned"), or whenever a dispute might later hinge on what a URL said at a moment in time.
Tools
| Tool | Price | What it does |
|---|---|---|
witness_url | $0.02 | Independent fetch + hash + timestamp + archive of a URL right now; returns snapshot id + signed certificate |
get_certificate | free | Certificate for any snapshot id: manifest, Ed25519 signature, Merkle proof, Base anchor transaction |
retrieve_snapshot | $0.05 | The archived response body + certificate — works for any snapshot id, any payer (this is how third parties obtain evidence) |
Install
npx -y witnessd-mcp
Claude Desktop / Cursor config:
{
"mcpServers": {
"witnessd": {
"command": "npx",
"args": ["-y", "witnessd-mcp"],
"env": {
"EVM_PRIVATE_KEY": "0x…"
}
}
}
}
Payment — two options
Set one of these environment variables:
EVM_PRIVATE_KEY— a wallet key holding USDC on Base. The server auto-pays each call via x402 (the buyer only signs; no ETH needed for gas). Use a small dedicated wallet, never your main one.WITNESSD_API_KEY— a prepaid credit key (buy a $1 pack viaPOST https://witnessd.vip/api/credits, x402-payable).
Optional: WITNESSD_URL to point at a different witnessd instance (default https://witnessd.vip).
Verify without trusting us
Certificates are self-verifying: leaf_hash = sha256(canonical-json(manifest)), Ed25519-signed, Merkle-proven into an hourly batch root anchored on Base (calldata 0x + wtns1 + root). Standalone checker: witnessd.vip/verify.js.
Privacy & scope
Certificates (hashes, timestamps, proofs) are public; archived content is delivered only to paying requesters and never republished. witnessd only witnesses what any stranger can see — no logins, no private networks, bodies ≤10 MB. Machine-readable service docs: llms.txt · openapi.json · /.well-known/x402.
MIT license.
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