# Sisbén API

## Pages

- [Sisbén API](https://docs.getarbol.com/api/sisben/index.md) — A person's Sisbén IV registration, with its official group and subgroup.

- **Base URL:** `https://api.getarbol.com/v1/sisben`
- **Authentication:** an API key or an OAuth access token, as `Authorization: Bearer <token>`. [Get an API key](/en/developers/authentication/).
- **Before you start:** Sisbén is included with Arbol: your organization's Owner turns it on in **Integrations** in Arbol Account ([how](/en/account/colombian-registries/)), or turn it on with [`account.registryInstallations.update`](/api/account/registry-installations/update/).
- **SDKs and tools:** [TypeScript](/en/developers/sdks/typescript/) (`arbol.sisben`), [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/sisben/openapi.json), to import into Postman or generate a client.

Try it with [Look up a Sisbén classification](/api/sisben/classifications/lookup/):

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

## Sections

- [Classifications](https://docs.getarbol.com/api/sisben/classifications/llms.txt)
- [Tags](https://docs.getarbol.com/api/sisben/tags/llms.txt)