API v1Stable major · additive within v1

Fat Heron API

Contract-first REST for builders and agents. Same control plane as Fat Heron products — documented here for the developer surface.

Capability index

New here? Human guides — claim email, Domainers day one, research with an AI assistant (goals over jargon).

Projects /v1/builders/projects workspaces for solo, consultancy, or freelance orgs.

Keys /v1/api-keys with fh_live_ and fh_test_ kinds (fh_test_ = sandbox dry-run + sb- projects); webhooks via /v1/notifications/webhooks.

Agents /docs/agents recipes + /llms.txt. OpenAPI: api.fatheron.dev/openapi.json.

Full reference lives in OpenAPI. Auth with a builders JWT or account API key (X-API-Key).

Docs · Fat Heron Developers