RxNorm MCP by usefulapi

RxNorm MCP by usefulapi

Look up drug names, RxCUIs, ingredients and interactions in RxNorm. Hosted, no local install.

Live endpoint: https://rxnorm.usefulapi.io/mcp · Homepage: https://usefulapi.io

Connect

• Claude (claude.ai, Desktop): open Customize → Connectors, click + Add → Add custom connector, and paste https://rxnorm.usefulapi.io/mcp.
• Claude Code: claude mcp add --transport http rxnorm https://rxnorm.usefulapi.io/mcp, then run /mcp to log in.
• VS Code: Add to VS Code.
• Cursor and other clients: add the URL as a remote MCP server:

{
  "mcpServers": {
    "rxnorm": {
      "url": "https://rxnorm.usefulapi.io/mcp"
    }
  }
}

Add only the URL. Do not add an Authorization header or an API key to the client config: the server signs you in with OAuth, and the login page asks for your email address and a 6-digit code.

Step-by-step setup, where to find your credentials, and FAQ: https://usefulapi.io/rxnorm/

This server needs no credential — RxNorm is a public data source. On first connect you log in with your email: we send a 6-digit code from [email protected]. The address is used only to send the code; we keep a one-way hash of it as your account id, so your free calls and your plan stay yours.

Tools

Tool	Type	What it does
rxnorm_find_rxcui_by_name	read	Find RxCUI by name
rxnorm_get_drugs	read	Search drugs by name
rxnorm_get_concept_properties	read	Get concept properties
rxnorm_get_related_by_type	read	Get related concepts by type
rxnorm_get_all_related	read	Get all related concepts
rxnorm_get_ndcs	read	Get NDCs for a concept
rxnorm_get_history_status	read	Get concept history / status
rxnorm_get_property	read	Get concept property
rxnorm_get_spelling_suggestions	read	Get spelling suggestions
rxnorm_get_approximate_match	read	Approximate term match
rxnorm_get_term_types	read	List term types
rxnorm_get_drug_classes	read	Get drug classes for a drug
rxnorm_get_class_members	read	Get drug class members
rxnorm_usage_status	meta	Usage status (free-tier meter)
rxnorm_request_feature	meta	Request a missing feature
rxnorm_upgrade	meta	Upgrade to Pro (unlimited*)
rxnorm_cancel_subscription	meta	Cancel the Pro subscription

read tools are read-only; write tools mutate data (clients should confirm them); meta tools report usage, manage your subscription or send a feature request.

Pricing

Plan	Price	Limit
Free	$0	50 tool calls / month
Pro	$9/mo or $90/yr (2 months free)	Unlimited*

*Pro has a fair use limit of 10,000 tool calls a month on this server. For more, write to [email protected].

Pro covers this server only. Subscribe with rxnorm_upgrade (it returns a Stripe Checkout link). Cancel any time with rxnorm_cancel_subscription: Pro continues to the end of the paid period, with no refund for the current period, and running rxnorm_upgrade before then undoes the cancel. Or write to [email protected].

License

MIT