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Entity-ID Resolver

Official registry Other

Ambiguous name/ticker to verified IDs: SEC CIK, GLEIF LEI, ISIN, Wikidata, CoinGecko. Non-US too.

Website

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

NPM package entityresolver-mcp
Claude Code 
claude mcp add entity-id-resolver -e 'BUYER_PRIVATE_KEY=<your buyer_private_key>' -e 'ENTITYRESOLVER_URL=<ENTITYRESOLVER_URL>' -- npx -y entityresolver-mcp@0.2.0
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "entity-id-resolver": {
            "command": "npx",
            "args": [
                "-y",
                "entityresolver-mcp@0.2.0"
            ],
            "env": {
                "BUYER_PRIVATE_KEY": "<your buyer_private_key>",
                "ENTITYRESOLVER_URL": "<ENTITYRESOLVER_URL>"
            }
        }
    }
}

Environment variables

  • BUYER_PRIVATE_KEY secret 0x-hex private key of a dedicated low-value wallet holding USDC on Base. Optional — without it only the free demo_resolve tool is available; with it the paid resolve_entity tool settles $0.005 USDC per call via x402.
  • ENTITYRESOLVER_URL Override the service base URL. Defaults to https://entityresolver.xyz.

Frequently asked questions

What is Entity-ID Resolver?

Ambiguous name/ticker to verified IDs: SEC CIK, GLEIF LEI, ISIN, Wikidata, CoinGecko. Non-US too.

How do I install Entity-ID Resolver?

It runs on your machine. In Claude Code: claude mcp add entity-id-resolver -e 'BUYER_PRIVATE_KEY=<your buyer_private_key>' -e 'ENTITYRESOLVER_URL=<ENTITYRESOLVER_URL>' -- npx -y entityresolver-mcp@0.2.0. For other clients, paste the JSON configuration from this page into their MCP settings.

Does Entity-ID Resolver need an API key?

Yes. It expects BUYER_PRIVATE_KEY, which you set in its configuration.

Who maintains Entity-ID Resolver?

It is published by xyz.entityresolver. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.