> For the complete documentation index, see [llms.txt](https://doc.duaer.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.duaer.com/getting-started/reactions.md).

# Search reactions in Duaer

In Duaer, search biochemical reactions via Rhea with Duaer Data. One successful search uses 1 credit. This page includes the full English call skill.
## What you get

Reactions in the Duaer data market returns Rhea reactions (id, equation, EC). One successful search uses 1 credit.

Add the node from the [Duaer Data category](/getting-started/duaer-data.md) (Reactions), or copy the skill on the [data market](/getting-started/data-market.md). Related: [Pathways](/getting-started/pathways.md).

## Search on the canvas

1. Open the node creator, select Duaer Data, then Reactions.
2. Enter Words (a new node starts with kinase) or EC (such as 2.7.10.1); both may be set.
3. Limit defaults to 10, max 20. Select Execute step.

A successful search uses 1 credit. Production deliverables land in the [data pool](/getting-started/data-pool.md).

## Call the API

- GET https://api.duaer.com/v1/data/reactions?...
- Authorization: Bearer <Duaer key>
- words or ec is required.

For keys, refer to [Authentication for the Duaer public API](/api/authentication.md). Below is the same English call skill as Copy skill.

## Call skill

Same text as Copy skill on the Duaer data market. Keep it English.

```
---
name: duaer-reactions
description: >-
  Search biochemical reactions through Duaer via Rhea.
  One successful search uses 1 Duaer credit.
---

# Duaer reactions

Search biochemical reactions through Duaer with a Duaer key (Rhea).

## Call

`GET https://api.duaer.com/v1/data/reactions?words=kinase&ec=2.7.10.1&limit=10`

Header: `Authorization: Bearer <Duaer key>`

Use an account key or a model API key.

Provide `words` or `ec` (or both).

- `words` — words in the equation, or a Rhea id (`RHEA:10596`).
- `ec` — optional. Enzyme Commission number (`2.7.10.1` or `ec:2.7.10.1`). Alone is enough.
- `limit` — optional. From 1 to 20. Default 10.

## Result

Each item has `source`, `title`, `url`, `summary`, `rheaId`, `equation`, `ec`, and `status`.
Related pathways: https://skills.duaer.com/pathways.md.
Related compounds: https://skills.duaer.com/compounds.md.

## Credits

One successful search uses 1 credit.
An empty search, a failed search, a compound that matches nothing, or no remaining credits uses 0.
No remaining credits returns 402 and does not search.
A missing key returns 401.

```
## Questions

### How do I fill EC for Duaer Reactions?

Use an Enzyme Commission number such as 2.7.10.1, or ec:2.7.10.1. EC alone is enough without Words.

## Related

- [Search pathways in Duaer](https://doc.duaer.com/getting-started/pathways.md)
- [Search compounds in Duaer](https://doc.duaer.com/getting-started/compounds.md)
- [Search metabolites in Duaer](https://doc.duaer.com/getting-started/metabolites.md)
- [Search proteins in Duaer](https://doc.duaer.com/getting-started/proteins.md)
- [Use the Duaer data market](https://doc.duaer.com/getting-started/data-market.md)