@AnchorRegistry
Basic information
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
Add this server to your MCP-compatible client using the configuration below.
{
"mcpServers": {
"anchorregistry": {
"type": "http",
"url": "https://mcp.anchorregistry.ai/mcp"
}
}
}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.
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.
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.
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.
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`.
No. The server is free and requires no API key, account, or authentication.
The smart contract is deployed on Base L2 at address `0x3eC509393425BCAa48224FB90C710e100ADA1D2A`. The security model is peer-reviewed and published on arXiv (2604.03434).
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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