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AnchorRegistry

@AnchorRegistry

Repository

About AnchorRegistry

AnchorRegistry is the open provenance layer for the agentic economy. Every digital artifact — code, research, data, models, media, agents, transactions — can be anchored to Base L2 with a permanent, machine-resolvable identifier (an AR-ID). When an AI assistant encounters an SPDX

#provenance#blockchain#base-l2#x402#verification#registry#research#reproducibility#on-chain#read-only#ai-trust#agent-discovery

Basic information

Category

Data & Analytics

Transports

stdio

Publisher

AnchorRegistry

Submitted by

Ian Moore

Config

Add this server to your MCP-compatible client using the configuration below.

{
  "mcpServers": {
    "anchorregistry": {
      "type": "http",
      "url": "https://mcp.anchorregistry.ai/mcp"
    }
  }
}

Tools

3

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.

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 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.

Overview

What is AnchorRegistry?

AnchorRegistry's MCP server lets any AI assistant resolve provenance records for artifacts anchored on Base L2. When an assistant encounters an SPDX-Anchor: anchorregistry.ai/AR-2026-XXXXXXX tag in a README, research paper, model card, or website, this server resolves it in one tool call.

How to use AnchorRegistry?

Install as an HTTP connector in Claude Desktop (Settings > Connectors > Add custom connector, URL https://mcp.anchorregistry.ai/mcp) or configure the MCP server in Cursor, VS Code, or Claude Code using the same URL. Once connected, call any of three tools: ar_verify_arid to resolve an AR‑ID, ar_verify_by_hash to look up by SHA‑256 manifest hash, or ar_resolve_tree to resolve a full provenance tree.

Key features of AnchorRegistry?

  • Resolve AR-IDs to full provenance records (title, author, manifest hash, timestamp)
  • Look up artifacts by SHA-256 manifest hash when no AR-ID is known
  • Resolve full provenance trees including descendants, relationships, and timestamps
  • Free to use — no API key or account required
  • Smart contract on Base L2 with peer-reviewed game-theoretic security
  • Open-source server (MIT) and contract (BUSL-1.1) on GitHub

Use cases of AnchorRegistry?

  • Verify artifact provenance from SPDX-Anchor tags in open-source repositories
  • Validate provenance claims in research papers, model cards, or websites
  • Trace the supply chain of linked artifacts via provenance tree resolution

FAQ from AnchorRegistry

What does AnchorRegistry MCP server do?

It resolves provenance records for artifacts anchored on Base L2. The server takes an AR-ID (like AR-2026-qnPOJ1z) or a SHA-256 manifest hash and returns the full provenance record — title, author, type, manifest hash, registrant, transaction hash, block number, anchored timestamp, and seal/retraction status.

How do I install AnchorRegistry MCP?

For Claude Desktop, go to Settings > Connectors > Add custom connector and enter https://mcp.anchorregistry.ai/mcp. For Cursor, VS Code, or Claude Code, add the server to your MCP configuration with type http and URL https://mcp.anchorregistry.ai/mcp.

Does it require an API key or authentication?

No. The server is free and requires no API key, account, or authentication.

What blockchain and smart contract is it built on?

The smart contract is deployed on Base L2 at address 0x3eC509393425BCAa48224FB90C710e100ADA1D2A. The security model is peer-reviewed and published on arXiv (2604.03434).

What tools does AnchorRegistry provide?

Three tools: ar_verify_arid (resolve an AR-ID), ar_verify_by_hash (resolve by 64-character hex SHA-256 manifest hash without 0x prefix), and ar_resolve_tree (resolve a full provenance tree from any anchor in the tree).

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