science.chem.formula
Get molecular formula and molecular weight for any compound by name, CAS number, or SMILES. Returns formula (e.g. "C9H8O4" for aspirin) and weight in daltons (e.g. 180.157). Accepts any chemical identifier format (NCI CACTUS)
This record as markdown: /tools/io-github-whiteknightonhorse-apibase/science.chem.formula.md
What science.chem.formula does on Apibase
AI agents call science.chem.formula to retrieve information from Apibase without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
identifier | string | Yes | Chemical identifier — compound name (e.g. "ibuprofen"), CAS number (e.g. "15687-27-1"), or SMILES string. Returns molecular formula and weight |
Parameters from the server's own tool schema.
Why science.chem.formula is rated Low
Retrieves chemical data without side effects; no modifications, execution, or destructive actions possible.
From the tool's definition Get molecular formula and molecular weight for any compound by name
Attacks that exploit this kind of access
The rule that runs science.chem.formula safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Apibase, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For science.chem.formula, this is the rule to start with:
science.chem.formula is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Apibase, apply this rule, and every science.chem.formula call is checked against it from then on.
Questions about science.chem.formula
Get molecular formula and molecular weight for any compound by name, CAS number, or SMILES. Returns formula (e.g. "C9H8O4" for aspirin) and weight in daltons (e.g. 180.157). Accepts any chemical identifier format (NCI CACTUS). It is categorised as a Read tool in the Apibase MCP Server, which means it retrieves data without modifying state.
science.chem.formula accepts 1 parameter: identifier. Required: identifier. The full parameter table on this page comes from the server's own tool schema.
Register the Apibase MCP server in PolicyLayer and add a rule for science.chem.formula: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Apibase. Nothing to install.
science.chem.formula is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the science.chem.formula rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for science.chem.formula. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
science.chem.formula is provided by the Apibase MCP server (apibase-mcp-client). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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