README.md

---
license: cc-by-4.0
language:
  - en
pretty_name: Nerq MCP-server repository mortality (2026-07)
size_categories:
  - 10K<n<100K
tags:
  - mcp
  - model-context-protocol
  - software-supply-chain
  - component-mortality
  - repository-liveness
  - github
task_categories:
  - tabular-classification
---

# Nerq MCP-server repository mortality — dataset dump (2026-07)

**As of:** 2026-07-22 · **Rows:** 28,824 · **License:** CC-BY 4.0
**Publisher: lastseen.dev (organisation).**

Canonical reference: Zenodo DOI https://doi.org/10.5281/zenodo.21869879 (cite this; always resolves to the latest version).

© 2026 lastseen.dev. Licensed CC-BY 4.0 — free to use, share, adapt, and use commercially, with attribution to lastseen.dev (link back). No share-alike. Dated factual observations, without warranty. The continuously-updated series is available via the free lastseen.dev / Nerq API.

## Dataset summary

One row per dated observation of a public GitHub repository linked from an indexed Model Context Protocol (MCP) server, classified by repository liveness. Same population as The Nerq Census No.1 / No.2 (2026).

## Files

- `nerq-mcp-mortality-2026-07.csv` — one row per observation.
- `nerq-mcp-mortality-2026-07.json` — the same rows plus a metadata head.

## Columns

`entity_id`, `registry`, `observed_date`, `state`, `http_status`, `last_commit`, `source`, `provenance`.

Full schema, thresholds, and interval-censoring notes are in `README.md` and `methodology.md`.

## State thresholds

- `deleted` — HTTP 404 (deleted or made private).
- `alive` — reachable, last commit ≤ 180 days before `observed_date`.
- `dormant` — reachable, 180–365 days.
- `abandoned` — reachable, > 365 days.
- `unknown` — unresolved at seed.

## State counts (2026-07-22)

alive 20,390 · deleted 3,448 · abandoned 2,686 · dormant 2,259 · unknown 41 · total 28,824.

## Caveats

`404` conflates deletion and privatization. `last_commit` is the default-branch last commit from `commits.atom`. Prevalence dump, not a lifespan study (MCP births are left-censored). Interval-censoring and a known 2026-07-30 collection gap are disclosed in the methodology.

## Citation

lastseen.dev. *Nerq MCP-server repository mortality — dataset dump (2026-07).* CC-BY-4.0.
Canonical DOI: https://doi.org/10.5281/zenodo.21869879