Contract-first REST for builders and agents. Same control plane as Fat Heron products — documented here for the developer surface.
Open a workspace for a product, consultancy, or freelance practice.
Required scopes: builders:write · Base https://api.fatheron.dev
1. Create project
POST /v1/builders/projects
X-API-Key: fh_live_…
Content-Type: application/json
{
"name": "Acme Launch",
"slug": "acme-launch",
"description": "Agent-provisioned workspace"
}Omit slug to auto-derive from name. Returns 201 with id like bprj-…
2. List projects
GET /v1/builders/projects X-API-Key: fh_live_…
Add ?include_archived=true to see archived workspaces.
invalid_slug
Use lowercase kebab: a-z, 0-9, hyphens only.
slug_taken
Pick another slug or omit slug.
insufficient_scope
Mint a key with builders:write (or legacy write).