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Delx Cohort Retention
x402
Delx Cohort Retention is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-13).
Calculates per-cohort and weighted aggregate retention rates from a bounded list of cohort data
Price / call$0.003
Success—
StatusUnknown
How this service works
Calculate per-cohort and weighted retention from bounded cohorts. Use it as a bounded preflight or analysis step inside an enterprise agent workflow before data, policy, integration, security, or commercial decisions reach production. Returns deterministic machine-readable JSON for $0.003 USDC via x402 on Base. Execution is first-party, local-only, stateless, memory-only, and has no paid upstream or input retention. Results are advisory; the caller remains responsible for authorization and prod…
Output
Returns a deterministic machine-readable JSON object containing per-cohort retention rates for each input cohort and a weighted aggregate retention metric across all cohorts, computed locally without any external calls or data retention.
Example use cases
Pre-launch retention preflight check
“Before we push the new onboarding flow to production, run a cohort retention analysis on these three cohorts from our A/B test — cohort control has 2000 users with 1400 retained, cohort variant-A has 1800 users with 1350 retained, and cohort variant-B has 1600 users with 1200 retained.”
Monthly SaaS cohort health report
“I have four monthly user cohorts from our SaaS product — Jan cohort 500 users 410 retained, Feb cohort 620 users 480 retained, Mar cohort 700 users 511 retained, Apr cohort 430 users 290 retained — can you compute per-cohort and weighted retention for the report?”
Mobile app retention benchmark comparison
“Compute weighted retention across our last five mobile app cohorts: cohort 1 is 300 users 210 retained, cohort 2 is 450 users 290 retained, cohort 3 is 380 users 220 retained, cohort 4 is 520 users 370 retained, cohort 5 is 410 users 300 retained — I need the numbers before the quarterly review.”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/cohort-retentionWhen to prefer
Choose this endpoint when you need a fast, deterministic, stateless cohort retention calculation as a preflight or analysis step in an enterprise agent workflow — especially when data privacy matters since it is local-only with no upstream data retention. Prefer it over general analytics platforms when you need machine-readable JSON output at low cost ($0.003 USDC) without spinning up a full analytics pipeline.
Side effects
- Empty or missing cohorts array returns validation error
- Cohort entries with zero users may cause division-by-zero handling
- Malformed cohort objects with missing required fields return schema errors
- Negative user counts or retained counts exceeding totals may return computation errors
- Request without valid x402 USDC payment on Base results in 402 Payment Required
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| cohorts | array | Input field: cohorts. |
Output
Schema · Response
{
"type": "json",
"example": {
"schema": "delx/util-cohort-retention/v1",
"cohorts": [
{
"start": 100,
"cohort": "2026-07",
"retained": 42,
"retention_percent": 42
}
],
"cohort_count": 1,
"weighted_retention_percent": 42
}
}Tags
x402
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