Documentation
SpecIndex docs
How the index is built, how to search it, how brand check works, and how to connect your own tools through the API and MCP server.
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Guides
What is SpecIndex
The public registry of US commercial pre-construction projects, each with a permanent SpecIndex ID and cited sources.
Search the index
Filter by state, county, CSI division and project stage. How scoring and the open-spec signal work.
Brand check
How we detect a brand in public spec language, what a basis of design line looks like, and how to read a position.
Data sources and refresh
Which public sources feed the index, how often each refreshes, and how citations are attached to every record.
Coverage
What all 50 states means in practice, where document coverage is deepest, and how to read the coverage report.
Alerts and digests
Setting up a weekly digest for a territory or a division. What triggers an alert.
Build on it
API and MCP server
Programmatic access to the same index. The MCP server exposes find_brand_positions, project_positions, find_displacement, search_projects, compare_brands, coverage_report, get_project and match_projects to any MCP compatible agent.