# Elements Live

> Research-intensity (RI/RIS/HRI) data for 118 chemical elements and
> thousands of research topics, derived from a continuously updated
> scientific-literature corpus.

- [API docs](https://www.elements-live.com/docs/api): how to get a key and call the API
- [OpenAPI spec](https://www.elements-live.com/v1/openapi.json): full endpoint reference
- [MCP server](https://www.elements-live.com/mcp): hosted Model Context Protocol endpoint
- [Methodology](https://www.elements-live.com/methodology): what RI/RIS/HRI mean
- [Agent skill](https://www.elements-live.com/docs/api/elements-live-skill.md): how an AI assistant should call the tools, read the numbers and cite them (always the latest version)

For a literature question (a reading list, what matters or what is new in a
field), call the `research` MCP tool or https://www.elements-live.com/v1/research?q=<question> first:
one call returns the matching research communities and curated foundational,
now and newest reading lists (Personal key, or per page via x402).

Current element scores need no key: the get_element_ri MCP tool,
https://www.elements-live.com/v1/elements and https://www.elements-live.com/v1/elements/{symbol}.
Element history and topic search are free with any API key (create one
at https://www.elements-live.com/account). Topic/keyword data and paper lists need a
Personal account (https://www.elements-live.com/pricing); the Lab needs Professional.

Without a key, every keyed call can be paid per call in USDC on Base or
Solana with x402, from $0.01; an AI agent should only pay with its
user's approval. Priced calls and prices:
https://www.elements-live.com/.well-known/x402