# compare_supplement_labels

Compare explicitly selected US label snapshots on one serving basis. Use only when stable label IDs are known. Do not use it to rank products, infer safety or efficacy, or equate different measurement objects. The read-only POST performs no persistence. Anonymous quota: one record unit per distinct label in the request, counted once.

## HTTP

`POST /api/v1/supplement-label-comparisons`

## MCP

Tool name: `compare_supplement_labels`

Transport: Streamable HTTP at `https://anaturalendeavor.com/mcp`.

## Coverage

Market: US only. Source boundary: published, rights-approved stored label snapshots.

## Authentication and limits

Anonymous public read is supported at the published experimental quota. Optional API keys use a Bearer header. Record unit: Each distinct input label, counted once.

## Limitations

Read only. No medical advice, product ranking, safety guarantee, or non-US inference.