Akashi Notari
Proof of existence for files: anchor a SHA-256 hash on Base, look up proofs. Paid with x402.
Connect it
Settings → Connectors → Add custom connector
URL: https://anchor.akashi-notari.com/mcpSettings → Apps & Connectors → Advanced → Developer mode
Create connector with URL: https://anchor.akashi-notari.com/mcp{
"mcpServers": {
"akashi-notari": {
"url": "https://anchor.akashi-notari.com/mcp"
}
}
}claude mcp add --transport http akashi-notari https://anchor.akashi-notari.com/mcp{
"servers": {
"akashi-notari": {
"type": "http",
"url": "https://anchor.akashi-notari.com/mcp"
}
}
}2 tools, verified live
find_proofread-onlyFree. Look up whether a file hash is anchored on Base and when, or read the proof written by a transaction. Pass `hash` or `tx`. Call it before anchor_hash to avoid paying for a hash that is already anchored.
anchor_hashPaid with x402 (USDC on Base). Writes the SHA-256 hash of a file on-chain; the block time becomes the proof of existence. Compute the hash locally and never send the file. The hash, the filename and the payer address become public and permanent. Without a payment in _meta["x402/payment"] the result is the payment requirement.
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