API reference & sandbox playground

Try the geocoding API live. Requests are forwarded to the production endpoint using your sandbox key — sandbox traffic is free and never counts against your plan's quota.

Download the spec

Use these to import GoGoDuk into your API tooling. The spec mirrors what production serves; we re-cut it on every release.

OpenAPI 3 (JSON)OpenAPI 3 (YAML)Postman collection

Insomnia: import the OpenAPI file directly — File → Import → URL https://gogoduk.com/openapi.json.

Your sandbox key (starts with gdk_; create one in /dashboard/api-keys)

input *lang

Notes

Only sandbox keys (environment = SANDBOX) are accepted here.
Sandbox calls return live data but are excluded from usage logs and quota counters.
Need code examples? Each endpoint page under /docs shows curl, JavaScript, Python, and Go snippets.
Prefer a typed client? See the TypeScript SDK — npm install @gogoduk/sdk.