District's Open Data portal lists 'MAR Web Services' from OCTO

The District of Columbia's Open Data portal lists a dataset titled "MAR Web Services," published by the Office of the Chief Technology Officer (OCTO) and made accessible through the city's official open-data site. The listing presents the resources as web services intended to be consumed by DC agencies, third-party developers, planners and residents. The dataset appears on the government's Open Data DC (.gov) catalog and is publicly discoverable via the portal.

The portal entry identifies the dataset under the label "MAR Web Services" and links to the web-service interfaces hosted through the city platform. The listing is part of the District's broader open-data program, which centralizes machine-readable datasets and APIs for use in planning, mapping, application development and transparency efforts.

What the Open Data listing shows

The dataset entry on the Open Data DC site is structured as a web-service resource, indicating endpoints that can be queried programmatically. The listing provides metadata, access points and technical details that help developers and agency staff integrate the services into mapping tools, internal workflows, or public applications. The portal's metadata also clarifies publisher responsibility: the Office of the Chief Technology Officer is the listed maintainer.

Open Data DC is the District's official repository for municipal datasets and APIs. The portal is used by a range of local stakeholders — city agencies that depend on shared data, planners who need authoritative geospatial services, independent developers building civic apps, and residents seeking machine-readable public information. By centralizing access, the portal aims to reduce duplication and make it easier to build interoperable services.

Who uses MAR Web Services in DC

Within the District's ecosystem, web services like the MAR listing typically support address validation, mapping layers, or other geospatial functions that underpin city applications and analysis. While the Open Data entry does not prescribe specific uses, the reachable endpoints are intended for programmatic access and integration by municipal teams, private developers and community groups working with civic data.

The inclusion of MAR Web Services in the city's catalog reinforces an ongoing push by OCTO to surface authoritative data sources through a single portal. That centralization helps technology teams across agencies avoid building redundant systems and enables external partners to rely on stable, documented data interfaces.

Watch for updates to the dataset page and its endpoints on Open Data DC as OCTO maintains and documents the services. Interested users can consult the portal entry for endpoint URLs, metadata and contact information for the dataset maintainer to confirm terms of use or technical details.