# Mostly Good Metrics (slim)

> Mostly Good Metrics is a product analytics service in public beta for indie developers and small teams. Apps send events through five SDKs or an HTTP API, and agents query funnels, retention and experiments through a hosted MCP server.

- Full: https://www.anchorterminal.com/tools/mostly-good-metrics.md (~6,300 tokens) · this version ~1,430 tokens · JSON https://www.anchorterminal.com/tools/mostly-good-metrics.json · canonical https://www.anchorterminal.com/tools/mostly-good-metrics
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-11-07 · pricing https://www.anchorterminal.com/tools/mostly-good-metrics#pricing · reviews https://www.anchorterminal.com/tools/mostly-good-metrics#reviews
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)

**E · 41.7/100 · rank #1277 of 1486 · #17 in Product analytics & experimentation · not agent-ready · confidence low**


Assessment: Mostly Good Metrics lets an agent run ad-hoc funnels, retention and up to ten metric queries per call through a hosted MCP server with OAuth, at prices from $0. It is a public beta built by one developer, with no status page, no named legal entity and no security policy found.

## Facts

- Kind: HTTP API · vendor: Mostly Good Metrics · category: Product analytics & experimentation · legal entity: not named · provenance 39/100
- Endpoint: `https://app.mostlygoodmetrics.com/mcp` (HTTP, Streamable HTTP)
- Auth: OAuth or key · pricing: Freemium · x402: no · licence: unknown
- Benchmark probes: not run yet, so Performance is pending
- Live, from our pollers (not part of the score): up at 2026-11-07 18:20 UTC · uptime 30 days 100.0% (200 probes) · p50 167 ms · p95 298 ms over 24 hours
- Surface listed: The hosted MCP server at app.mostlygoodmetrics.com/mcp and the ingestion API at ingest.mostlygoodmetrics.com, read from docs.mostlygoodmetrics.com, mostlygoodmetrics.com (home, about, press, terms, privacy), the OAuth metadata and the Mostly-Good-Metrics repositories on 6 November 2026. No account was made and no tool was called
- MCP tools: Account and projects (6), dashboard (6), events (3), funnels (6), retention (6), queries (7), experiments (7), alerts (5) and goals (7)
- HTTP API: POST /v1/events, GET /v1/experiments and GET /v1/experiments/configs on ingest.mostlygoodmetrics.com, plus a Goals API at api.mostlygoodmetrics.com/api/v2 in limited preview
- SDKs: Swift, Kotlin (Android), React Native, Flutter and JavaScript, plus Capacitor, all MIT on GitHub
- Data retention: Raw event history is kept for the life of a paid subscription; on account deletion data is removed within 14 days, per the privacy policy
- Operator: No legal entity is named in the terms or privacy policy; the about and press pages say Josh Holtz builds it
- Sub-processors: Neon, Resend, Sentry, RevenueCat, Fly.io, MaxMind, GitHub and Google, named in the terms
- Prices: Starter plan $9 per month (plan); Pro plan $29 per month (plan)

- Scores: Reliability 29, Performance pending, Schema & documentation 49, Agent ergonomics 49, Security & auth 33, Payments & pricing 30, Task success pending, Maintenance & community 74, Transparency & trust 45 · total over the 7 assessed categories
- Why: Reliability, Graded on the hosted service with the hosted lines. · Schema & documentation, No OpenAPI file was found. · Agent ergonomics, 53 tools, more than 30 (5). · Security & auth, OAuth 2.0 with PKCE, dynamic client registration and a revocation endpoint for MCP and the CLI; project ingest keys in a Bearer header that… · Payments & pricing, No x402, MPP or L402 (0). · Maintenance & community, CLI v0.1.4 was tagged on 16 October 2026 (30). · Transparency & trust, The service is closed; the SDKs and CLI are MIT.
- Sources: 12, open questions: 4, both in the full twin
- Capabilities: analytics.query, analytics.funnels, analytics.events, analytics.experiments
- JSON: https://www.anchorterminal.com/api/v1/tools/mostly-good-metrics.json
- Verify (for the vendor): the badge `https://www.anchorterminal.com/badges/mostly-good-metrics.svg` or a link to https://www.anchorterminal.com/tools/mostly-good-metrics from a page on mostlygoodmetrics.com or one of its subdomains, then `POST https://www.anchorterminal.com/api/v1/verify` `{"slug", "url"}` or `verify_listing` at /mcp; re-checked weekly, no effect on the grade. Snippets in the full twin.
- Support: support@mostlygoodmetrics.com; https://docs.mostlygoodmetrics.com; more in the full twin

## Before you call it

1. Use query_metrics for several aggregate questions instead of repeated execute_query calls
2. Pass inline definitions to execute_funnel and execute_retention rather than creating saved objects
3. Confirm with the user before delete, revoke_api_key or stop_experiment calls, since the server doesn't ask
4. Start a fresh agent session after connecting, since a running client may not reload the tool list
5. On 429 from ingestion, wait for Retry-After before resending events

## Connect

```bash
claude mcp add --transport http mgm https://app.mostlygoodmetrics.com/mcp
```
Full config and headless snippets are in the full page. Through letme (picks today, calling later): https://letme.dev/mostly-good-metrics

## Similar tools

| Tool | Grade | Score | Shared capabilities | Slim |
| --- | --- | --- | --- | --- |
| Amplitude | B | 69.3 | analytics.query, analytics.funnels, analytics.experiments, analytics.events | https://www.anchorterminal.com/tools/amplitude.min.md |
| PostHog | B | 67.4 | analytics.query, analytics.events, analytics.funnels, analytics.experiments | https://www.anchorterminal.com/tools/posthog.min.md |
| Mixpanel | B | 62 | analytics.query, analytics.funnels, analytics.events, analytics.experiments | https://www.anchorterminal.com/tools/mixpanel.min.md |
| Matomo | C | 61.7 | analytics.query, analytics.events, analytics.funnels, analytics.experiments | https://www.anchorterminal.com/tools/matomo.min.md |
| Countly | E | 38.8 | analytics.query, analytics.events, analytics.funnels, analytics.experiments | https://www.anchorterminal.com/tools/countly.min.md |


## Panel reviews (0, desk reviews from public material, no calls made)