Verified historical geography for your AI agents.
AtlasPI is a REST API + MCP server for historical geography: structured, cited data that cuts LLM hallucinations on historical queries by 3×. Instead of making things up, the agent retrieves facts with sources. Open source, with a citable Zenodo DOI.
What it does
AtlasPI gives AI agents structured, verified historical-geography data — entities, cities, events, trade routes — with confidence scores and academic sources. Instead of inventing, the agent retrieves cited facts via REST API or MCP server, measurably reducing hallucinations on historical queries.
Who it's for
- Developers of AI agents and RAG applications
- Digital-humanities and research projects
- EdTech with interactive maps and timelines
- Game design that needs historical accuracy
Cited historical facts, not invented ones
REST API
50+ endpoints, structured JSON, no authentication to get started.
MCP server
Native integration with Claude Desktop and Model Context Protocol agents.
Cited data
Academic sources, confidence scores and confirmed / uncertain / disputed status.
5,000 years of coverage
From 4500 BC to 2024, with an interactive map and time slider.
Fewer hallucinations
Measured error-rate drop from 0.21 to 0.07 per query (≈3×).
Open source
Apache 2.0 core, with a citable Zenodo DOI for papers.
Build AI agents that don't invent history
Explore the AtlasPI API and MCP server, or contact us for high-volume or dedicated-data use.