MatRouter

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MatRouter is an agent-native routing and aggregation substrate for materials data. It turns an explicit data need into executable routes across heterogeneous sources, then assembles returned records, structures, properties, artifacts, provenance, and execution outcomes into one EvidenceBundle.

The Agent (LLM + MCP + Skill) owns planning, source breadth, retries, scientific interpretation, and prose. MatRouter owns capability truth, source-qualified execution, normalization, provenance, and bundle integrity. It preserves the context needed for downstream reasoning without turning retrieval into a scientific verdict.

Install

MatRouter requires Python 3.11 or newer.

# Python dependency
uv add --prerelease=allow matrouter

# Standalone MCP command
uv tool install --prerelease=allow matrouter

From a checkout:

git clone https://github.com/MatRouter/matrouter.git
cd matrouter
uv sync
uv run matrouter

Python

from matrouter import create_router

with create_router() as router:
    print(router.get_evidence_capability_document())

EvidenceBundle is the core output and the sole record of what was requested, attempted, returned, or missing.

Four narrowly scoped, versioned reference assessments remain available as an explicit opt-in:

matrouter --enable-reference-policies

They are reproducible examples over an assembled bundle, not a universal scientific reasoner and not part of the default routing surface.

Agent plugin

Codex and Claude Code can install the bundled plugin; other MCP hosts can run matrouter as a local stdio server and use the portable Skill when supported. See the user guide for the current installation and configuration procedure.

The sole distributable Skill source is plugins/matrouter/skills/matrouter/.

Scope

MatRouter does not mirror upstream databases, infer missing values, impose a fixed research workflow, or decide scientific truth. OPTIMADE remains complementary: OPTIMADE standardizes provider-side common records; MatRouter orchestrates native and OPTIMADE sources on the Agent side and preserves their source-specific context in a common bundle.

Documentation

User guide: installation, configuration, MCP, sources, and usage.
Development guide: architecture, contracts, and maintenance.
Verification report: current tested surface and limits.
Plugin guide: agent-host installation.

Contact

Quansheng Wu quansheng.wu@iphy.ac.cn, wuquansheng@gmail.com
Tiannian Zhu (朱天念) tnzhu@iphy.ac.cn

License

MatRouter is licensed under Apache-2.0; see LICENSE and NOTICE. Retrieved data remains subject to each upstream provider's terms, licenses, attribution requirements, and access restrictions.

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