Data Angers

What Data Angers does

Data Angers exposes Angers Loire Métropole Open Data through MCP. The underlying source is data.angers.fr, an OpenDataSoft-based portal covering subjects such as mobility, urban services and the environment. The integration is independent and unofficial, and it is delivered through the Pipeworx gateway.

Its workflow follows the structure of the source catalog: locate a relevant dataset, inspect its metadata, then retrieve or summarize records. This makes it suitable for agents that need to answer questions from local public datasets rather than work with a fixed, hard-coded table.

How it works

The hosted MCP endpoint is:

https://gateway.pipeworx.io/data-angers/mcp

An MCP client connects to that URL and can call the three Data Angers tools. The gateway also exposes shared Pipeworx meta-tools on hosted pack endpoints, including routing through ask_pipeworx. The exact tool list is returned during MCP initialization, so clients may see more tools than the three Data Angers-specific operations.

A full Pipeworx gateway endpoint is also available at https://gateway.pipeworx.io/mcp. Both hosted URLs use the same gateway and data sources; the pack endpoint lists Data Angers tools directly, while the full gateway lists tools from the wider catalog.

For clients without MCP support, individual tools can be called over HTTP. The npm package provides a local stdio process that forwards requests to the hosted gateway, so it still needs network access and does not provide offline operation.

Setup and configuration

For a hosted connection, add the endpoint to an MCP client configuration:

{
  "mcpServers": {
    "data-angers": {
      "url": "https://gateway.pipeworx.io/data-angers/mcp"
    }
  }
}

The local option uses the package @pipeworx/mcp-data-angers:

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

Anonymous use is available with a daily limit of 50 calls. A free Pipeworx account and PIPEWORX_API_KEY increase the allowance to 200 calls per day. Set PIPEWORX_META_TOOLS=1 for the local bridge if the shared gateway tools should also be listed. When using an HTTPS proxy, newer Node.js versions can honor the proxy environment through NODE_USE_ENV_PROXY=1.

Tools and capabilities

• search_datasets finds Angers Loire Métropole datasets by keyword and returns dataset IDs, titles, themes and record counts.
• dataset_info returns a dataset’s fields, schema, themes and record count. Use it to identify column names before writing a query.
• query retrieves dataset records with ODSQL. It supports where filters, group_by and select aggregation, order_by sorting, and limit/offset pagination.
• ask_pipeworx can route a plain-language question across the wider Pipeworx catalog when shared meta-tools are enabled or when using the hosted gateway.

Limitations and notes

The data source is limited to datasets published by Angers Loire Métropole Open Data. The npm bridge is a network client rather than a local data service. Hosted pack connections include shared Pipeworx meta-tools, which can increase the number of schemas shown by an MCP client. Calls made with a Pipeworx key are metered and billed according to the gateway account.