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Canonicalhash

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io.github.Mlartab2/canonicalhashv1.0.0

Deterministic JSON hashing and EIP-712 attestations for AI agents via x402.

Crypto & Web3

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https://canonicalhash-production.up.railway.app/mcp

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Tool list from our last check. Connect live to refresh it.

batch_canonicalize

Batch canonicalize up to 1000 JSON payloads in one call.

payloadsarray, required

Array of JSON payloads, each stringified

This tool isn't marked read-only, so it may change something on the server or in an account you connected.

I understand, run it anyway

Tools (5)

batch_canonicalize

Batch canonicalize up to 1000 JSON payloads in one call.

Canonicalhash MCP server | mcptry

canonicalize

Canonicalize JSON with RFC 8785 and return a SHA-256 hash plus an EIP-712 signed attestation.

Argument	Type	Description
payload*	string	The JSON payload stringified (e.g., '{"b":2,"a":1}')
algorithm	string

Input schema (JSON)

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "payload"
  ],
  "properties": {
    "payload": {
      "type": "string",
      "description": "The JSON payload stringified (e.g., '{\"b\":2,\"a\":1}')"
    },
    "algorithm": {
      "enum": [
        "sha256",
        "sha512"
      ],
      "type": "string",
      "default": "sha256"
    }
  }
}

create_receipt

Generate a tamper-evident EIP-712 action receipt for an agent decision.

Argument	Type	Description
action*	string	Description of the action
metadata	string	Additional metadata stringified JSON

Input schema (JSON)

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "action"
  ],
  "properties": {
    "action": {
      "type": "string",
      "description": "Description of the action"
    },
    "metadata": {
      "type": "string",
      "description": "Additional metadata stringified JSON"
    }
  }
}

structure_extraction

Extract structured JSON from messy text (emails, logs, tickets) using regex or Needle 3.

Argument	Type	Description
text*	string	The messy text to extract from
schema	string	Optional output schema stringified JSON

Input schema (JSON)

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "text"
  ],
  "properties": {
    "text": {
      "type": "string",
      "description": "The messy text to extract from"
    },
    "schema": {
      "type": "string",
      "description": "Optional output schema stringified JSON"
    }
  }
}

verify_attestation

Verify an EIP-712 attestation against the published public key. Always free.

Argument	Type	Description
attestation*	string	The attestation object stringified JSON

Input schema (JSON)

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "attestation"
  ],
  "properties": {
    "attestation": {
      "type": "string",
      "description": "The attestation object stringified JSON"
    }
  }
}