# Nueva EPS API

## Pages

- [Nueva EPS API](https://docs.getarbol.com/api/nueva-eps/index.md) — Member affiliation lookups through your Nueva EPS connections.

- **Base URL:** `https://api.getarbol.com/v1/nueva-eps`
- **Authentication:** an API key or an OAuth access token, as `Authorization: Bearer <token>`. [Get an API key](/en/developers/authentication/).
- **Before you start:** your organization needs a connection to Nueva EPS, which the Arbol team sets up. [How integrations work](/en/developers/integrations/).
- **SDKs and tools:** [TypeScript](/en/developers/sdks/typescript/) (`arbol.nuevaEps`), [Rust](/en/developers/sdks/rust/), the [CLI](/en/developers/cli/) and [MCP](/en/developers/mcp/). Every endpoint has a sample for each.
- **OpenAPI:** [openapi.json](/api/nueva-eps/openapi.json), to import into Postman or generate a client.

Try it with [Look up member affiliation](/api/nueva-eps/affiliations/lookup/):

```bash
curl https://api.getarbol.com/v1/nueva-eps/affiliations/lookup \
  --request POST \
  --header "Authorization: Bearer $ARBOL_API_KEY" \
  --header "Content-Type: application/json" \
  --data '{
  "documentType": "CC",
  "documentNumber": "<documentNumber>"
}'
```

## Sections

- [Affiliations](https://docs.getarbol.com/api/nueva-eps/affiliations/llms.txt)
- [Tags](https://docs.getarbol.com/api/nueva-eps/tags/llms.txt)