Public record
Software health reportschema 0.34.0 · metrics 2.10.0 · 2026-09-12 12:19 UTC

mdn / mdn-http-observatory

Backend for HTTP Observatory on MDN

JavaScriptMPL-2.0★ 141 stars⑂ 34 forkssince Jun 2024View on GitHub ↗
KindCommand-line toolLibraryNetwork servicehow this is determined
#http-headers#mdn#security-tools#http#security#privacy

mdn/mdn-http-observatory holds a health index of 94 out of 100, placing it in the Exceptional band. It scores highest on Vitality (98/100) and lowest on AI Readiness (61/100). It was last updated 2 days ago. A single contributor accounts for most of its recent work.

94
overall / 100
Exceptional

Software health index

Metrics are grouped into weighted categories on one standardized 1–100 scale. Overall starts as their weighted mean, calibrated against the distribution of the public record so bands carry percentile meaning; when public evidence triggers the High-Risk Jurisdiction Policy, the rating is adjusted and receives an At Risk ceiling of 34.

94
Exceptional93-100The record's top tier (≈ top 5%); essentially all checked criteria met
Excellent80-92Strong across the board; minor gaps
Good65-79Healthy; gaps are limited and manageable
Moderate50-64Acceptable with notable gaps; review recommended
Weak35-49Material weaknesses across several areas
At Risk20-34Significant weaknesses; adoption warrants caution
Critical1-19Severe problems (abandoned, single-maintainer, no hygiene)
VitalityCommunity &AdoptionSustainability &GovernanceEngineeringQualitySecurityAI Readiness

Score profile

Each axis is a category. The shape matters more than the average — a healthy subject fills the whole shape, while a spike-and-crater profile means strength in one dimension is masking risk in another.

The weighted overall 81 is calibrated to 94 on the published index scale (record calibration 2026-08-02).

Ownership

MDN Web DocsOrganization
13,193 followers134 public repossince May 2014

This repository is backed by an organization — shared, accountable stewardship that can outlive any single maintainer.

Package ecosystems

RegistryPackageVersionDownloads / moVersionsLast publish
npm@mdn/mdn-http-observatory1.7.18,390278 days ago

Metrics by category

Vitality

Is the project alive — is code being written and are releases shipping?

98Exceptional · 21% of overall

Development activity

97Exceptional
How it's scored
36/36Push recency — last push 2 days ago
33.2/36Commit cadence — 48/52 weeks with commits
18/18Commit volume — 272 commits in the last year
10/10OpenSSF Scorecard: Maintained — 30 commit(s) and 1 issue activity found in the last 90 days -- score normalized to 10
Inputs used
commits_last_year272
human_commit_share0.25
days_since_last_push2
active_weeks_last_year48

Release discipline

100Exceptional
How it's scored
27/27Ships releases — 35 releases published
36/36Release recency — latest release 8 days ago
27/27Release cadence — a release every ~29.5 days
0/10OpenSSF Scorecard: Signed-Releases — no data
Inputs used
releases_count35
latest_release_tagv1.7.1
releases_from_tagsno
days_since_latest_release8
mean_days_between_releases29.5
Excluded from scoring (no data or not applicable): OpenSSF Scorecard: Signed-Releases. Remaining weights renormalized.

Community & Adoption

Does the project have users, downloads, attention, and a welcoming setup for contributors?

68Good · 17% of overall

Popularity & adoption

49Weak
How it's scored
34.8/60Stars — 141 stars
12.7/25Forks — 34 forks
1.7/15Watchers — 3 watchers
Inputs used
forks34
stars141
watchers3
growth_stateorganic
growth_factor_pct100

Community health

92Excellent
How it's scored
22.5/22.5README
22.5/22.5License — recognized license (MPL-2.0)
18/18CONTRIBUTING guide
13.5/13.5Code of conduct
0/7.2Issue template
6.3/6.3PR template
Inputs used
has_readmeyes
has_licenseyes
readme_badges0
has_contributingyes
has_issue_templateno
has_code_of_conductyes
readme_badge_services—
has_pull_request_templateyes

Ecosystem adoption (downloads)

65Good
How it's scored
52.3/80Monthly downloads — 8,390 downloads/month across npm
0/20Registry dependents — not reported by this ecosystem
Inputs used
packages@mdn/mdn-http-observatory
dependents—
ecosystemsnpm
total_downloads—
monthly_downloads8,390
unverified_packages_excluded—
Excluded from scoring (no data or not applicable): Registry dependents. Remaining weights renormalized.

Sustainability & Governance

Will the project survive its people — bus factor, responsiveness, who backs it, and package upkeep?

73Good · 23% of overall

Maintainer resilience (bus factor)

42Weak
How it's scored
9/54Bus factor — 1 contributor(s) cover half of all commits
11.1/22.5Commit distribution — top contributor authored 51% of commits
12.2/13.5Contributor breadth — 9 contributors
10/10OpenSSF Scorecard: Contributors — project has 5 contributing companies or organizations
Inputs used
bus_factor1
contributors_sampled9
top_contributor_share0.507

Issue & PR responsiveness

83Excellent
How it's scored
29.6/42Issue resolution — 70% of issues closed
27.2/30PR acceptance — 489/540 decided PRs merged
0/13Newcomer PR acceptance — no first-time contributor's PR decided in 30d
15/15OpenSSF Scorecard: Code-Review — all changesets reviewed
Inputs used
merged_prs489
open_issues18
closed_issues43
prs_merged_7d2
prs_decided_7d2
prs_merged_30d9
prs_decided_30d9
issue_closed_ratio0.705
closed_unmerged_prs51
first_time_authors_30d0
first_time_prs_merged_30d0
first_time_prs_decided_30d0
Excluded from scoring (no data or not applicable): Newcomer PR acceptance. Remaining weights renormalized.

Ownership & stewardship

80Excellent
How it's scored
30/30Ownership backing — organization-owned
0/20Verified domain
25/25Owner reach — 13,193 followers of mdn
25/25Track record — 134 public repos, account ~12 yr old
Inputs used
followers13,193
owner_typeOrganization
is_verifiedno
owner_loginmdn
public_repos134
account_age_days4,505

Package maintenance

100Exceptional
How it's scored
25/25Published & resolvable — 1 package(s) on npm
35/35Publish recency — latest publish 8 days ago
20/20Version history — 27 published versions
20/20Not deprecated — active, not deprecated or yanked
Inputs used
packages@mdn/mdn-http-observatory
ecosystemsnpm
any_deprecatedno
min_days_since_publish8

Engineering Quality

Are baseline engineering and documentation practices in place?

84Excellent · 19% of overall

Engineering practices

90Excellent
How it's scored
24/24CI workflows — 8 workflow(s)
24/24Tests present
16/16Linter config — eslint.config.js
0/9.6Pre-commit hooks
6.4/6.4.editorconfig
20/20OpenSSF Scorecard: CI-Tests — 30 out of 30 merged PRs checked by a CI test -- score normalized to 10
Inputs used
has_ciyes
has_testsyes
has_editorconfigyes
has_linter_configyes
has_precommit_configno

Documentation

75Good
How it's scored
30/30README
0/25Documentation directory
15/15Documentation / homepage site — https://developer.mozilla.org/en-US/observatory
10/10Repository description
10/10Topics — 6 topics
10/10Wiki
Inputs used
topicshttp-headers, mdn, security-tools, http, security, privacy
has_wikiyes
homepagehttps://developer.mozilla.org/en-US/observatory
docs_sitehttps://developer.mozilla.org/en-US/observatory
has_readmeyes
has_docs_dirno
has_descriptionyes

Security

Are visible security and supply-chain practices strong, without unresolved high-risk jurisdiction exposure?

86Excellent · 16% of overall

Security posture

82Excellent
How it's scored
7.5/7.5Binary-Artifacts — no binaries found in the repo
6/7.5Branch-Protection — branch protection is not maximal on development and all release branches
2.5/2.5CI-Tests — 30 out of 30 merged PRs checked by a CI test -- score normalized to 10
0/2.5CII-Best-Practices — no effort to earn an OpenSSF best practices badge detected
7.5/7.5Code-Review — all changesets reviewed
2.5/2.5Contributors — project has 5 contributing companies or organizations
10/10Dangerous-Workflow — no dangerous workflow patterns detected
7.5/7.5Dependency-Update-Tool — update tool detected
0/5Fuzzing — project is not fuzzed
2.5/2.5License — license file detected
7.5/7.5Maintained — 30 commit(s) and 1 issue activity found in the last 90 days -- score normalized to 10
5/5Packaging — packaging workflow detected
3.5/5Pinned-Dependencies — dependency not pinned by hash detected -- score normalized to 7
5/5SAST — SAST tool is run on all commits
5/5Security-Policy — security policy file detected
0/7.5Signed-Releases — no data
0/7.5Token-Permissions — detected GitHub workflow tokens with excessive permissions
7.5/7.5Vulnerabilities — 0 existing vulnerabilities detected
Inputs used
sourceopenssf_scorecard
checks_evaluated17
scorecard_versionv5.5.0
checks_inconclusive1
scorecard_aggregate8.2
Excluded from scoring (no data or not applicable): Signed-Releases. Remaining weights renormalized.

Dependency advisories

100Exceptional
How it's scored
35/35Direct dependencies free of known advisories — no direct dependency carries a known advisory
25/25Indirect dependencies free of known advisories — no indirect dependency carries a known advisory
0/40No advisories left outstanding — no advisory carries a publication date
Inputs used
sourceosv
advisories0
affected_packages0
assessed_packages203
unassessed_packages0
affected_by_severitynone
direct_affected_packages0
Excluded from scoring (no data or not applicable): No advisories left outstanding. Remaining weights renormalized. Matched the npm:@mdn/mdn-http-observatory@1.7.1 runtime dependency closure — what installing the published package pulls in — 203 packages. Reachability is not analyzed.

AI Readiness

How well is the repo equipped to be developed and maintained with AI coding agents? Carries a deliberately small weight (4%): agent tooling is a real maintenance signal, but a repository with none can still reach 100/100.

61Moderate · 4% of overall

Agent context & guidance

40Weak
How it's scored
0/45Agent instructions — no CLAUDE.md / AGENTS.md / editor rules
0/15Machine-readable docs (llms.txt)
40/40Legible commit history — 25 of 25 human commits state their intent (structured subject or explanatory body)
Inputs used
has_llms_txtno
llms_txt_url—
legible_history_share1
agent_instruction_files—
agent_instruction_max_bytes—

Verify loop (build / test / typecheck)

69Good
How it's scored
0/18One-command bootstrap
22/22Automated tests
11/11Lint / format config — eslint.config.js
11/11Static type checking — jsconfig.json
10/10Reproducible environment — Dockerfile, lockfile
0/10Demonstrated agent practice — no agent-authored commits among the last 100
8/8Automated maintenance — 75 of the last 100 commits are automated dependency updates
7/10OpenSSF Scorecard: Pinned-Dependencies — dependency not pinned by hash detected -- score normalized to 7
Inputs used
has_nixno
has_testsyes
lockfilespackage-lock.json
has_dockerfileyes
typed_languageno
bootstrap_files—
has_devcontainerno
has_linter_configyes
typecheck_configsjsconfig.json
agent_commit_share0
toolchain_manifests—
dependency_bot_commit_share0.75

Code legibility for models

82Excellent
How it's scored
27/45Type-checkable code — JavaScript with type-check config (jsconfig.json)
55/55Manageable file sizes — 0/76 source files over 60KB
Inputs used
primary_languageJavaScript
largest_source_bytes29,472
source_files_sampled76
oversized_source_files0

Key facts

141GitHub stars
9contributors
272commits, last 12 months
2days since last push
35releases
1bus factor
18open issues
npmpackage ecosystems

Data collection warnings

  • Star history unavailable: GitHub GraphQL error: Resource not accessible by personal access token
  • Star history carried forward from 2026-07-14: GitHub restricted the stargazers API to repository admins, so it can no longer be collected. The repository has 141 stars today.

More detail

Star and fork history 135 ★ / 34 ⇿
135Stars
34Forks
32Releases

When each star and fork was added, collected from GitHub and bucketed by day. Cumulative growth sits directly above the daily additions it is made of, so the two read against each other: steady organic accretion looks nothing like an abrupt, short-lived burst. Where that difference is measurable, it is reported as growth authenticity.

Star history is shown as collected on 2026-07-14. GitHub restricted the stargazers API to repository administrators in July 2026, so this series can no longer be extended; the current star total above remains live.

02550751001251501353342024-062025-072026-07
Major 1Minor 6Patch 25

Each point covers 2 days.

OpenSSF Scorecard 8.2 / 10
8.2aggregate

Independent, tool-agnostic security assessment from the open-source OpenSSF Scorecard. Each check rewards a security practice, not a specific vendor's tool. Checks Scorecard could not determine are marked n/a and excluded from the security score (never counted as zero).Scorecard v5.5.0 · 2026-09-12 12:18 UTC

10Binary-Artifactsno binaries found in the repo
8Branch-Protectionbranch protection is not maximal on development and all release branches
10CI-Tests30 out of 30 merged PRs checked by a CI test -- score normalized to 10
0CII-Best-Practicesno effort to earn an OpenSSF best practices badge detected
10Code-Reviewall changesets reviewed
10Contributorsproject has 5 contributing companies or organizations
10Dangerous-Workflowno dangerous workflow patterns detected
10Dependency-Update-Toolupdate tool detected
0Fuzzingproject is not fuzzed
10Licenselicense file detected
10Maintained30 commit(s) and 1 issue activity found in the last 90 days -- score normalized to 10
10Packagingpackaging workflow detected
7Pinned-Dependenciesdependency not pinned by hash detected -- score normalized to 7
10SASTSAST tool is run on all commits
10Security-Policysecurity policy file detected
n/aSigned-Releasesno releases found
0Token-Permissionsdetected GitHub workflow tokens with excessive permissions
10Vulnerabilities0 existing vulnerabilities detected
Direct dependencies 24
RegistryPackageVersion constraintManifest
npm@fastify/cors^11.0.1package.json
npm@fastify/helmet^13.0.0package.json
npm@fastify/postgres^6.0.1package.json
npm@fastify/static^10.1.0package.json
npm@sentry/node^10.1.0package.json
npmaxios^1.10.0package.json
npmaxios-cookiejar-support^7.0.0package.json
npmchange-case^5.4.4package.json
npmcommander^15.0.0package.json
npmconvict^6.2.4package.json
npmdayjs^1.11.13package.json
npmfastify^5.4.0package.json
npmfastify-simple-form^3.0.0package.json
npmhtmlparser2^12.0.0package.json
npmhttp-cookie-agent^8.0.0package.json
npmnode_extra_ca_certs_mozilla_bundle^1.0.7package.json
npmpg^8.16.2package.json
npmpg-format^1.0.4package.json
npmpg-pool^3.10.1package.json
npmpostgrator^8.0.0package.json
npmpostgrator-cli^10.0.0package.json
npmstructured-headers^2.0.3package.json
npmtldts^7.0.12package.json
npmtough-cookie^5.0.0package.json
All dependencies 488

Full resolved dependency set from the GitHub dependency graph: 25 direct and 463 indirect (transitive) packages. The transitive closure is complete when the repository commits a lockfile.

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npmlefthook2.1.12indirect
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npmlefthook-linux-arm642.1.12indirect
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npmmodule-details-from-path1.0.4indirect
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Dependency advisories 0

Installing npm:@mdn/mdn-http-observatory@1.7.1 pulls in 203 packages, direct and transitive: 0 carry known advisories, of which 0 are direct dependencies.

No known advisories affect the assessed dependencies.

An advisory means the version recorded in the dependency graph falls inside an advisory’s affected range. Reachability is not analysed, and the graph includes development and test pins — a finding may concern tooling rather than shipped software.

Raw JSON report machine-readable

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94Bearer/bearerCode security scanning tool (SAST) to discover, filter and prioritize security and privacy risks.Exceptional98caddyserver/caddyFast and extensible multi-platform HTTP/1-2-3 web server with automatic HTTPSExceptional99prowler-cloud/prowlerProwler is the world’s most widely used open-source cloud security platform that automates security and compliance across any cloud environment.Exceptional96secureCodeBox/secureCodeBoxsecureCodeBox (SCB) - continuous secure delivery out of the box Exceptional96mitmproxy/mitmproxyAn interactive TLS-capable intercepting HTTP proxy for penetration testers and software developers.Exceptional96cipherstash/stackSearchable, application-level encryption for building privacy-first appsExceptional

Scores are signals, not warranties. They reflect publicly visible practices on GitHub — not a code audit, and not a security guarantee.

Missing data is excluded and weights renormalized, never scored as zero. Methodology is versioned and open: metrics v2.10.0, schema v0.34.0 — full methodology · metrics wiki.

How one result sits in the wider record: aggregate statistics — npm.