Observe test
Read a Test's outcome now and append it as an Observation.
Held to the rule frozen at commit. Low delivery is inconclusive, never a loss; every result is observational.
Requires a key with write scope or higher.
MCP: meta_observe_test.
bearerAuthAuthorizationBearer <token>An API key from Settings → API keys, sent as Authorization: Bearer rsk_….
Authorization has two independent axes.
The scope is ranked — a key satisfies any requirement at or below its own tier:
read— every GET.write— launch ads PAUSED, sync, pull history, edit thresholds, Values, briefs, tests, swipes and research.admin— everythingwritecan. No operation requires more thanwritetoday.
There is no approve scope. It was a rung once; it is not one now, and a key requested with it is rejected.
The approval grant (can_approve) is a separate boolean, not a rung. Changing spend on Meta — activating a launch, pausing or resuming ads, retargeting an ad set, or rebuilding a launch's live creative — needs write and the grant. Keeping them on separate axes is what makes the review gate a control rather than a convention: a key that may propose is not automatically a key that may approve its own proposal.
A key reaches the one workspace — one Meta ad account — it was minted in, and stops working when the operator who minted it leaves the workspace. The same key authenticates the MCP endpoint (/api/mcp) for a headless agent, with the same scope and grant.
testId*stringA Test id, from GET /api/v1/tests.
uuidIdempotency-Key?stringAny unique string up to 256 characters. A retry with the same key and body replays the first success (Idempotency-Replay: true) instead of doing the work twice; the same key with a different body is refused.
length <= 256Created. The body is the tool's own result — the same payload the MCP tool returns.
application/json- response
curl -X POST 'https://winandscale.com/api/v1/tests/497f6eca-6276-4993-bfeb-53cbbbba6f08/observations'{}