Proofmark Hash runs on your own machine — the client starts it, so there is no endpoint to ping. Last commit 7 Nov 2026.
Hash text with SHA-256, SHA-512 or SHA3-256, and verify a digest.
Today is the operative word: we check Proofmark Hash every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.
This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.
claude mcp add proofmark-hash -- npx -y proofmark-hash
{
"mcpServers": {
"proofmark-hash": {
"command": "npx",
"args": [
"-y",
"proofmark-hash"
]
}
}
}
[mcp_servers.proofmark-hash]
command = "npx"
args = ["-y", "proofmark-hash"]
{
"mcpServers": {
"proofmark-hash": {
"command": "npx",
"args": [
"-y",
"proofmark-hash"
]
}
}
}
{
"servers": {
"proofmark-hash": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"proofmark-hash"
]
}
}
}
Hash text with SHA-256, SHA-384, SHA-512 and compare hashes
Hash and HMAC text locally with MD5, SHA-1, SHA-256, SHA-384 and SHA-512, in hex and base64
Computes MD5, SHA1, SHA256, SHA512, and CRC32 digests from text, base64, or hex input.
Generate and verify TOTP codes offline: RFC 6238 with SHA-1/256/512 and fresh base32 secrets
Fetch public HTTP GET responses as text with status, content type and a content hash.
Mark: stamp files with a signed, timestamped provenance record. Hash locally; verify free.
Proof of existence for files: anchor a SHA-256 hash on Base, look up proofs. Paid with x402.
Hash passwords with bcrypt and issue/verify JWT session tokens over A2A + MCP.
Answers built from our own checks of this server.