LabelFellow API

A REST API to quote, buy, and track shipping labels. Tenant-isolated, USD prepaid credit, idempotent writes.

Authentication

Authenticate with your tenant API key as a bearer token. Each tenant is isolated, with its own balance and shipments.

Quote a shipment

curl https://labelfellow.com/v1/rates \
  -H "authorization: Bearer $API_KEY" \
  -H "content-type: application/json" \
  -d '{"warehouse_id":"wh_...","to":{...},"parcel":{...}}'

Buy a label

curl https://labelfellow.com/v1/shipments \
  -H "authorization: Bearer $API_KEY" \
  -H "idempotency-key: $UNIQUE" \
  -d '{"rate_id":"rate_..."}'

Full reference

The OpenAPI specification covers every endpoint, including tracking events and outbound webhooks.