Nueva EPS API

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.
Before you start: your organization needs a connection to Nueva EPS, which the Arbol team sets up. How integrations work.
SDKs and tools: TypeScript (arbol.nuevaEps), Rust, the CLI and MCP. Every endpoint has a sample for each.
OpenAPI: openapi.json, to import into Postman or generate a client.

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>"
}'

Affiliations

Look up member affiliation
POST /v1/nueva-eps/affiliations/lookup