Custom metric, built and refined in place
Metric building is the highest-volume thing customers do with the MCP. The first answer is almost never the final one. The MCP is designed to refine in place: change the time range, swap a dimension, add a filter, and the same metric updates. This shows the iteration loop.
Turn 1: Build it
Built a draft metric: "Signup-to-account-created conversion (last 30 days)". View and save it in Fullstory: [metric link]
Note: your org doesn't have a defined event named "account_created". The closest match is "signup_complete", which fires on the /welcome page after signup. Should I use that instead?
Turn 2: Compute it
Signup-to-signup_complete conversion (last 30 days): 62.4%
- 12,418 users hit /signup
- 7,749 of them fired signup_complete
Turn 3: Refine the grouping
Conversion by traffic source (last 30 days):
| Traffic source | Conversion | Users |
|---|---|---|
| Organic search | 78.2% | 4,102 |
| Direct | 71.5% | 3,228 |
| 68.9% | 1,634 | |
| Referral | 59.7% | 540 |
| Paid social | 41.3% | 2,914 |
Turn 4: Tighten the cohort
Conversion by traffic source, mobile only (last 30 days):
| Traffic source | Conversion | Users |
|---|---|---|
| Organic search | 71.8% | 1,883 |
| Direct | 64.2% | 1,541 |
| 58.3% | 749 | |
| Referral | 51.1% | 224 |
| Paid social | 28.7% | 1,612 |
Turn 5: Watch it over time
Daily trend: paid social mobile conversion (last 60 days)
Values range from 22% to 41%.
Notable shifts:
- Dropped from 38% to 24% the week of April 12
- Returned to 33% by April 26
- Currently trending at 29%
What you walk out with
A draft metric, refined through five turns, with a link to view it in Fullstory. If you want to keep it for a dashboard or ongoing monitoring, click through the link and save it. The MCP builds and refines the definition for you, but the final save is a deliberate user action so nothing clutters your org by accident.
Behind the scenes
The MCP routes this workflow through: build_segment, build_metric, compute_metric, and update_metric. Turns 3, 4, and 5 are all update_metric calls — the same draft definition is refined in place across the chain.