Add hashanchor-mcp — Blockchain hash anchoring for AI agents

[linyao0177]

MCP Server Submission

Name: hashanchor-mcp

Description: Anchor and verify data on the blockchain from any AI agent. One command gives Claude (or any MCP client) the ability to create tamper-proof, timestamped records on Polygon.

npm: https://www.npmjs.com/package/hashanchor-mcp

GitHub: https://github.com/linyao0177/hashanchor-mcp

Install:

npx -y hashanchor-mcp

Claude Desktop config:

{
  "mcpServers": {
    "hashanchor": {
      "command": "npx",
      "args": ["-y", "hashanchor-mcp"],
      "env": {
        "HASHANCHOR_API_KEY": "ha_your_api_key"
      }
    }
  }
}

Tools (9):

Tool	Auth	Description
provision	—	Register a new account and get an API key
anchor_text	API Key	Anchor text content (auto SHA-256)
anchor_hash	API Key	Anchor a pre-computed SHA-256 hash
verify	Public	Verify if a hash is anchored on-chain
check_status	API Key	Check detailed status of a hash
batch_status	API Key	Check status of multiple hashes (max 100)
get_receipt	Public	Get Merkle proof receipt for a hash
get_usage	API Key	Check plan, quota, and rate limits
list_chains	Public	List supported blockchains

Category: Blockchain / Data Integrity / Attestation

License: MIT