AnchorRegistry MCP Server

by anchorregistry Your server? Claim it

answering

AnchorRegistry is answering right now. Last checked 2 min ago. It exposes 3 tools. Last commit 13 Jun 2026.

On-chain provenance lookup for AnchorRegistry. Resolve AR-IDs, hashes, and full trees. Authless.

Uptime history 47 days of history · worst day 48%

47 days agonow

50.0%

Uptime 24h

92 of 184 checks

Tools

read from the server

881 ms

Response time

average over 24h

Stars

last commit 13 Jun 2026

What the code does

We read the source, 22 h ago · tools taken from the live server · rules 3dff92dd89df

Capabilities

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

Runs an external command worker-configuration.d.ts:2208

    exec(input?: (string | URLPatternURLPatternInit), baseURL?: string): URLPatternURLPatternResult | null;

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

This code can reach further than it looks

We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 2 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add ar-mcp --transport http https://mcp.anchorregistry.ai/mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "ar-mcp": {
      "url": "https://mcp.anchorregistry.ai/mcp"
    }
  }
}

~/.codex/config.toml

[mcp_servers.ar-mcp]
url = "https://mcp.anchorregistry.ai/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "ar-mcp": {
      "url": "https://mcp.anchorregistry.ai/mcp"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "ar-mcp": {
      "url": "https://mcp.anchorregistry.ai/mcp"
    }
  }
}

This server publishes 1 more address. The block above uses the one we reach during checks; the full list is under Endpoints below, and the author may intend a particular one for your client.

Available tools 3

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

verify

ar_verify_arid

Resolve an AnchorRegistry AR-ID to its full provenance record. Use this when you encounter an SPDX-Anchor or DAPX-Anchor tag (e.g. in a README, paper, model card, or website) and need to confirm what the artifact is, who anchored it, when, what type it is, and whether the tree has been sealed, retracted, voided, or affirmed. Free, public, no auth required.

ar_verify_by_hash

Resolve an artifact by its SHA-256 manifest hash. Use this when you have the artifact itself but no AR-ID, and want to check whether it has been anchored. Returns the AR-ID and full provenance record if found, or a clear "not anchored" response otherwise.

resolve

ar_resolve_tree

Resolve the full provenance tree for an AR-ID. Returns every anchor in the tree (root + all descendants) with their relationships, types, manifest hashes, and timestamps. Use this when you need to understand a multi-artifact provenance chain — for example, a research paper anchored as the root with its training dataset and model weights as children.

Endpoints

URL	Transport	State	Latency	Checked
https://mcp.anchorregistry.ai/mcp	streamable-http	answering	788 ms	2 min ago
https://mcp.anchorregistry.ai/sse	sse	answering	283 ms	2 min ago

Alternatives to AnchorRegistry

same job, measured the same way

ARES (Czech business registry)

by milos106

MCP for ARES, the Czech business registry: lookup, due diligence, insolvency, signed provenance

34 installs/wk local only

three.ws Naming

by nirholas

On-chain identity for AI agents: resolve .sol names, reverse-lookup wallets, check handles.

203 installs/wk local only

Proof Layer

by world-999-labs

Signed, hash-chained provenance receipts for AI agent actions.

22 installs/wk local only

Smartpolicy

by smartpolicy-protocol

Runtime authorization for AI agents and smart contracts via an immutable on-chain policy registry

48 installs/wk local only

Sintegra CCC Completa

by mcp-dir

Full lookup of the centralized taxpayer registry (CCC) in Sintegra for a person or company from the

7 tools answering

Gstinapi MCP

by csofttarun

GSTIN verification, GST filing history, HSN/SAC lookup, and MCA company registry for India.

33 installs/wk local only

NDEX Pricing

by nd-x

Swiss market prices for video games and consoles, with provenance. Read-only, OAuth 2.1.

answering

three.ws AgenC

by nirholas

Browse the AgenC on-chain task marketplace, query the agent registry, and link identities.

191 installs/wk local only

AnchorRegistry — questions

Answers built from our own checks of this server.

What can AnchorRegistry do?

It exposes 3 tools, read directly from the server on our last check. Among them: ar_resolve_tree, ar_verify_arid, ar_verify_by_hash. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is AnchorRegistry working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 92 of 184 checks got a reply (50.0%), average response time 881 ms. The bar chart above shows every period we have measured.

How do I connect AnchorRegistry?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does AnchorRegistry need an API key?

No. AnchorRegistry completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 3 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is AnchorRegistry?

It answers our handshake in 881 ms on average, which is faster than 11% of all working MCP servers we measure. That is on the slow side — worth knowing if the tool sits inside an interactive loop. The comparison comes from our own checks across the whole registry, every 15 minutes.

Is AnchorRegistry open source?

Yes — it is published under the MIT licence, written in TypeScript and 0 stars on GitHub. The source link is on this page, so you can read exactly what it does with your data before you connect it.