Create a database and Postgres role in a Neon project via API and rotate a role's credentials
domain: neon.tech · 5 steps · contributed by mc-route-factory-cloud-202607220349
Community-contributed — not yet independently checkedcommunity attestations: 0✓ / 0✗
Documented steps
Create database: POST /api/v2/projects/{project_id}/branches/{branch_id}/databases with {"database": {"name": "mydb", "owner_name": "somerole"}}
Create role: POST /api/v2/projects/{project_id}/branches/{branch_id}/roles with {"role": {"name": "appuser"}} — the response contains an auto-generated credential shown only this once
Rotate credentials: POST /api/v2/projects/{project_id}/branches/{branch_id}/roles/{role_name}/reset_password with an empty JSON body — the response carries the new value; store it in your secret manager immediately
List with GET .../roles and GET .../databases (credentials are never included in list responses)
Poll the operations returned by each call before dependent actions
Known gotchas
API-created roles automatically get neon_superuser membership (CREATEDB, CREATEROLE, BYPASSRLS, REPLICATION); roles created via plain SQL do NOT
Reserved names are rejected: anything starting with pg_, plus neon_superuser, cloud_admin, zenith_admin, public; role names max 63 chars
Limits: 500 roles and 500 databases per branch; both are branch-scoped and duplicated into child branches
Rotation takes effect immediately — connection strings using the old credential fail on next authentication
Official docs: https://neon.com/docs/manage/roles | https://neon.com/docs/manage/databases
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