Service twin · API + UI

Google Calendar

Test scheduling agents that create events, resolve conflicts, and coordinate attendees.

API + UIspec-groundedREST · MCP · CLI

Start a twin run Read the quickstart Open the live explorer

Terminal

$ uv tool install blobfish-cli
$ blobfish twin login
$ blobfish twin-runs create --twins googlecalendar --ttl 60 --wait

What’s inside

A deterministic, seeded, resettable replica: every operation below executes real state transitions against the twin’s own SQLite state — reads are hash-invariant, writes produce inspectable diffs, and reset restores the seed baseline.

Operations38

Writes27

Entities11

Lifecycles0

Seeded entities

Entity	Table	Fields
acl	`acls`	6
acl_rule	`acl_rules`	5
calendar	`calendars`	11
calendar_list	`calendar_lists`	6
calendar_list_entry	`calendar_list_entries`	21
channel	`channels`	10
color	`colors`	5
event	`events`	44
free_busy_request	`free_busy_requests`	7
free_busy_response	`free_busy_responses`	6
setting	`settings`	4

Three surfaces, one state

Mount Google Calendar in a twin environment and the same seeded state serves vendor-shaped REST operations, an MCP endpoint for tool calling, and a generated bf-twin CLI — with copy-on-write sessions per rollout and a one-call reset to the seed baseline. Prefer raw HTTP? The same create works with curl:

API

$ curl -sS -X POST https://blobfish.ai/api/v1/twin/environments \
    -H "X-API-Key: $BLOBFISH_API_KEY" -H "Content-Type: application/json" \
    -d '{"services":["googlecalendar"],"ttl_minutes":60}'

Known limitations

Spec-grounded surface with synthetic seeded values; operations outside the spec are not mounted.