# RxNorm Drug Normalization API

> RxNorm Drug Normalization API is a paid API for AI agents from clonecho.builda.company, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-13).

Normalizes a drug name to its RxCUI identifier and returns matching branded (SBD) and clinical (SCD) drug products

## Facts

- Endpoint: POST https://clonecho.builda.company/x402/rx-normalize
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/rxnorm-drug-normalization-api-2bddde31
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_0rXf-mtHspBDbVShkjha1

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability rxnorm-drug-normalization-api-2bddde31 -d '<json body>'
```

Example prompt: Can you look up the RxNorm code and all the branded and clinical drug products for 'metformin'?

## When to prefer this

Use this endpoint when you need to standardize a free-text drug or medication name to a canonical RxCUI identifier, or when you need to enumerate all branded (SBD) and clinical (SCD) drug product forms for a given drug. Ideal for healthcare applications that need to normalize user-submitted medication names before storing or comparing them, or for agents building drug lookup, drug interaction, or medication reconciliation workflows.

## Known failure modes

- Drug name not found in RxNorm — returns empty or null RxCUI
- Misspelled drug name yields no results or incorrect matches
- Ambiguous drug name may return multiple or unexpected RxCUI codes
- Network or service error returns non-200 HTTP response
- Missing or empty query parameter returns error response

## How this service works

HEALTH: RxNorm normalization for a drug name → RxCUI plus branded (SBD) and clinical (SCD) drug products. ?q=name. Returns JSON.

## Output

A JSON object containing the RxCUI identifier for the queried drug name, along with lists of branded drug products (SBD) and clinical drug products (SCD) that match the normalized drug concept.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/rxnorm-drug-normalization-api-2bddde31/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from clonecho.builda.company](https://www.zero.xyz/host/clonecho.builda.company/llms.txt)