@realhandles/mcp

An MCP server that lets an AI agent look up a RealHandles identity and cryptographically verify its signed proof.

The signature check runs locally (via @realhandles/verify), so whether a manifest is authentic never depends on trusting realhandles.com. That decision is the math, done on your side.

Whether an account inside that manifest was ever actually checked is a different question, and it is not one a signature can answer: platform, handle and method are whatever the signer typed, so a flawless signature over {platform: "github", handle: "torvalds", method: "oauth"} is a flawless signature over a lie. Only the party that performed a verification holds a record of it, so the verified/claimed split comes from the RealHandles directory, which intersects the signed manifest against its own proof rows. Both halves are required and neither is enough alone. Anything the directory does not back is reported as claimed, including when an older deployment returns no split at all, in which case the result says so rather than promoting the accounts.

Tools

• verify_identity(handle) - resolve a handle (aliases and renames included), verify its signed manifest, and return the accounts split into verified and claimed, the key fingerprint, the did:key, and the trust score (which counts verified accounts only).

• check_link(url) - check whether a URL is a mutually confirmed account of a RealHandles identity (for rendering a "verified" badge).

Related MCP server: Agent Identity MCP Server

Use it

Hosted (no install)

The server runs as a stateless HTTP endpoint, so most clients just need the URL:

https://mcp.realhandles.com/mcp

Nothing to install, no account, no key. Under the 2026-07-28 spec there is no session to establish, so a client can call it directly:

curl -X POST https://mcp.realhandles.com/mcp \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/list"}'

Local (stdio)

Still supported and unchanged. For Claude Desktop, in claude_desktop_config.json:

{
  "mcpServers": {
    "realhandles": {
      "command": "npx",
      "args": ["-y", "@realhandles/mcp"]
    }
  }
}

Either way, ask things like "verify the RealHandles identity for david" or "is https://example.com a confirmed account of a RealHandles user?"

Both transports serve the same two tools from the same definitions in src/tools.ts, and the signature check is local to whoever runs it in both cases. The hosted endpoint reads the directory exactly like the local one does, so running it yourself does not put you in a weaker position than using ours.

To point it at a different deployment, set REALHANDLES_ORIGIN (defaults to https://realhandles.com).

Develop

pnpm install
pnpm build
pnpm test

Tests run on Node's own test runner and Node's own TypeScript stripping, so there is no test dependency to install. They need Node 22.18 or newer for that; the engines floor stays at 18 because it describes the published dist, which is plain JavaScript.

License

MIT

Why the @realhandles/verify range is not a caret

package.json asks for ">=0.10.0 <1.0.0" rather than ^0.10.0, and that is deliberate.

A caret on a 0.x version does NOT cross a minor: ^0.6.0 will never install 0.7.0. This package has been silently stranded by that twice, and the second time it went three minors behind before anybody noticed, because nothing breaks loudly. A manifest carrying a field the pinned verifier does not know still verifies, since verifySignedManifest checks the signature over the payload bytes and re-parses without rejecting unknown properties. So a stale pin does not fail; it just quietly stops being able to SURFACE things the product publishes.

While @realhandles/verify is pre-1.0 and is maintained in lockstep with the site (it is src/lib/manifest.ts, didkey.ts and handles.ts copied verbatim, guarded by pnpm check:verify-sync over there), tracking the newest 0.x is what we actually want. Revisit when it reaches 1.0.