Public record
Software health reportschema 0.16.0 · metrics 2.10.0 · 2026-07-20 16:35 UTC

yjacquin / fast-mcp

A Ruby Implementation of the Model Context Protocol

RubyMIT★ 1,182 stars⑂ 107 forkssince Mar 2025View on GitHub ↗
KindNetwork servicehow this is determined

yjacquin/fast-mcp holds a health index of 56 out of 100, placing it in the Moderate band. It scores highest on Engineering Quality (75/100) and lowest on AI Readiness (36/100). It was last updated 216 days ago. A single contributor accounts for most of its recent work.

56
overall / 100
Moderate

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.

56
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 54 is calibrated to 56 on the published index scale (record calibration 2026-08-02).

Ownership

Yorick JacquinPersonal account
59 followers1 public reposince Jun 2019@wax-app

This repository is owned by a personal account. A single-owner project carries more continuity risk than an organization-backed one.

Package ecosystems

RegistryPackageVersionDownloads / moVersionsLast publish
RubyGemsfast-mcppoints to another repo — not scored1.6.0-10294 days ago

Metrics by category

Vitality

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

38Weak · 21% of overall
How it's scored
3.6/36Push recencylast push 216 days ago
2.1/36Commit cadence3/52 weeks with commits
10.8/18Commit volume15 commits in the last year
0/10OpenSSF Scorecard: Maintained0 commit(s) and 0 issue activity found in the last 90 days -- score normalized to 0
Inputs used
commits_last_year15
human_commit_share
days_since_last_push216
active_weeks_last_year3
How it's scored
27/27Ships releases10 releases published
16.2/36Release recencylatest release 294 days ago
27/27Release cadencea release every ~20.2 days
0/10OpenSSF Scorecard: Signed-ReleasesProject has not signed or included provenance with any releases.
Inputs used
releases_count10
latest_release_tagv1.6.0
releases_from_tagsno
days_since_latest_release294
mean_days_between_releases20.2

Community & Adoption

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

72Good · 17% of overall
How it's scored
49.8/60Stars1,182 stars
16.9/25Forks107 forks
6.5/15Watchers16 watchers
Inputs used
forks107
stars1,182
watchers16
growth_stateunverified
growth_factor_pct100
growth_unverified_reasonno_history
How it's scored
22.5/22.5README
22.5/22.5Licenserecognized license (MIT)
18/18CONTRIBUTING guide
0/13.5Code of conduct
0/7.2Issue template
0/6.3PR template
Inputs used
has_readmeyes
has_licenseyes
readme_badges
has_contributingyes
has_issue_templateno
has_code_of_conductno
readme_badge_services
has_pull_request_templateno

Sustainability & Governance

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

46Weak · 23% of overall
How it's scored
9/54Bus factor1 contributor(s) cover half of all commits
8.9/22.5Commit distributiontop contributor authored 60% of commits
13.5/13.5Contributor breadth22 contributors
10/10OpenSSF Scorecard: Contributorsproject has 8 contributing companies or organizations
Inputs used
bus_factor1
contributors_sampled22
top_contributor_share0.603
How it's scored
16.4/42Issue resolution39% of issues closed
22.1/30PR acceptance53/72 decided PRs merged
0/13Newcomer PR acceptanceno first-time contributor's PR decided in 30d
7.5/15OpenSSF Scorecard: Code-ReviewFound 16/28 approved changesets -- score normalized to 5
Inputs used
merged_prs53
open_issues47
closed_issues30
prs_merged_7d
prs_decided_7d
prs_merged_30d
prs_decided_30d
issue_closed_ratio0.39
closed_unmerged_prs19
first_time_authors_30d
first_time_prs_merged_30d
first_time_prs_decided_30d
Excluded from scoring (no data or not applicable): Newcomer PR acceptance. Remaining weights renormalized.
How it's scored
10/30Ownership backingpersonal (user) account
0/20Verified domainnot applicable to user accounts
12.8/25Owner reach59 followers of yjacquin
14.2/25Track record1 public repos, account ~7 yr old
Inputs used
followers59
owner_typeUser
is_verified
owner_loginyjacquin
public_repos1
account_age_days2,589
Excluded from scoring (no data or not applicable): Verified domain. Remaining weights renormalized.

Engineering Quality

Are baseline engineering and documentation practices in place?

75Good · 19% of overall
How it's scored
24/24CI workflows3 workflow(s)
24/24Tests present
16/16Linter config.rubocop.yml
0/9.6Pre-commit hooks
0/6.4.editorconfig
4/20OpenSSF Scorecard: CI-Tests6 out of 24 merged PRs checked by a CI test -- score normalized to 2
Inputs used
has_ciyes
has_testsyes
has_editorconfigno
has_linter_configyes
has_precommit_configno

Documentation

85Excellent
How it's scored
30/30README
25/25Documentation directory
0/15Documentation / homepage site
10/10Repository description
10/10Topics5 topics
10/10Wiki
Inputs used
topicsai, llm, mcp, rack, ruby
has_wikiyes
homepage
docs_site
has_readmeyes
has_docs_diryes
has_descriptionyes

Security

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

48Weak · 16% of overall
How it's scored
7.5/7.5Binary-Artifactsno binaries found in the repo
2.2/7.5Branch-Protectionbranch protection is not maximal on development and all release branches
0.5/2.5CI-Tests6 out of 24 merged PRs checked by a CI test -- score normalized to 2
0/2.5CII-Best-Practicesno effort to earn an OpenSSF best practices badge detected
3.8/7.5Code-ReviewFound 16/28 approved changesets -- score normalized to 5
2.5/2.5Contributorsproject has 8 contributing companies or organizations
10/10Dangerous-Workflowno dangerous workflow patterns detected
7.5/7.5Dependency-Update-Toolupdate tool detected
0/5Fuzzingproject is not fuzzed
2.5/2.5Licenselicense file detected
0/7.5Maintained0 commit(s) and 0 issue activity found in the last 90 days -- score normalized to 0
5/5Packagingpackaging workflow detected
0/5Pinned-Dependenciesdependency not pinned by hash detected -- score normalized to 0
0/5SASTSAST tool is not run on all commits -- score normalized to 0
5/5Security-Policysecurity policy file detected
0/7.5Signed-ReleasesProject has not signed or included provenance with any releases.
0/7.5Token-Permissionsdetected GitHub workflow tokens with excessive permissions
0/7.5Vulnerabilities68 existing vulnerabilities detected
Inputs used
sourceopenssf_scorecard
checks_evaluated18
scorecard_versionv5.5.0
checks_inconclusive0
scorecard_aggregate4.4
How it's scored
12.4/35Direct dependencies free of known advisories2 affected: puma 6.6.0 (high 7.5), sinatra 4.1.1 (moderate 5.3)
0/25Indirect dependencies free of known advisoriestransitive set not separable from development and test dependencies in this scope
35.3/40No advisories left outstanding1 advisory-carrying package(s) unaddressed past 90 days; oldest published 282 days ago
Inputs used
sourceosv
advisories88
affected_packages17
assessed_packages150
unassessed_packages6
affected_by_severitycritical 3, high 9, moderate 4, low 1
direct_affected_packages2
Excluded from scoring (no data or not applicable): Indirect dependencies free of known advisories. Remaining weights renormalized. Matched 150 resolved dependencies against OSV. 6 could not be assessed — no resolved version, an unsupported ecosystem, or beyond the reported package list. This repository publishes no package the index resolves, so the repository dependency graph was assessed instead. That graph mixes development and test pins with shipped dependencies, so only the declared runtime dependencies are scored; transitive findings are reported as context and excluded from the score. 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.

36Weak · 4% of overall
How it's scored
0/45Agent instructionsno CLAUDE.md / AGENTS.md / editor rules
0/15Machine-readable docs (llms.txt)
0/40Legible commit historyno data
Inputs used
has_llms_txtno
llms_txt_url
legible_history_share
agent_instruction_files
agent_instruction_max_bytes
Excluded from scoring (no data or not applicable): Legible commit history. Remaining weights renormalized.
How it's scored
0/18One-command bootstrap
22/22Automated tests
11/11Lint / format config.rubocop.yml
0/11Static type checking
10/10Reproducible environmentDockerfile, lockfile
0/10Demonstrated agent practiceno data
5/8Automated maintenancedependency automation configured, none observed in the sampled commits
0/10OpenSSF Scorecard: Pinned-Dependenciesdependency not pinned by hash detected -- score normalized to 0
Inputs used
has_nixno
has_testsyes
lockfilesGemfile.lock
has_dockerfileyes
typed_languageno
bootstrap_files
has_devcontainerno
has_linter_configyes
typecheck_configs
agent_commit_share
toolchain_manifests
dependency_bot_commit_share0
Excluded from scoring (no data or not applicable): Demonstrated agent practice. Remaining weights renormalized.
How it's scored
0/45Type-checkable codeRuby without a type-check config
55/55Manageable file sizes0/71 source files over 60KB
Inputs used
primary_languageRuby
largest_source_bytes25,635
source_files_sampled71
oversized_source_files0
How it's scored
0/40API schema (OpenAPI/GraphQL/proto)
0/20MCP server
40/40Runnable examplesexamples
Inputs used
example_dirsexamples
has_mcp_signalno
api_schema_files
interfaces_expected_ofnetwork-service

Key facts

1,182GitHub stars
22contributors
15commits, last 12 months
216days since last push
10releases
1bus factor
47open issues
RubyGemspackage ecosystems

Data collection warnings

  • rubygems package 'fast-mcp' points at a different repository (https://github.com/yjacquin/fast_mcp); excluded from ecosystem scoring

More detail

OpenSSF Scorecard 4.4 / 10
4.4aggregate

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 · 2026-07-20 16:35 UTC

10Binary-Artifactsno binaries found in the repo
3Branch-Protectionbranch protection is not maximal on development and all release branches
2CI-Tests6 out of 24 merged PRs checked by a CI test -- score normalized to 2
0CII-Best-Practicesno effort to earn an OpenSSF best practices badge detected
5Code-ReviewFound 16/28 approved changesets -- score normalized to 5
10Contributorsproject has 8 contributing companies or organizations
10Dangerous-Workflowno dangerous workflow patterns detected
10Dependency-Update-Toolupdate tool detected
0Fuzzingproject is not fuzzed
10Licenselicense file detected
0Maintained0 commit(s) and 0 issue activity found in the last 90 days -- score normalized to 0
10Packagingpackaging workflow detected
0Pinned-Dependenciesdependency not pinned by hash detected -- score normalized to 0
0SASTSAST tool is not run on all commits -- score normalized to 0
10Security-Policysecurity policy file detected
0Signed-ReleasesProject has not signed or included provenance with any releases.
0Token-Permissionsdetected GitHub workflow tokens with excessive permissions
0Vulnerabilities68 existing vulnerabilities detected
Direct dependencies 3
RegistryPackageVersion constraintManifest
RubyGemspumaGemfile
RubyGemsrackupGemfile
RubyGemssinatraGemfile
All dependencies 156

Full resolved dependency set from the GitHub dependency graph: 3 direct and 153 indirect (transitive) packages. The transitive closure is complete when the repository commits a lockfile.

RegistryPackageVersionRelation
RubyGemspuma6.6.0direct
RubyGemsrackup2.2.1direct
RubyGemssinatra4.1.1direct
RubyGemsactioncable8.0.2indirect
RubyGemsactionmailbox8.0.2indirect
RubyGemsactionmailer8.0.2indirect
RubyGemsactionpack8.0.2indirect
RubyGemsactiontext8.0.2indirect
RubyGemsactionview8.0.2indirect
RubyGemsactivejob8.0.2indirect
RubyGemsactivemodel8.0.2indirect
RubyGemsactiverecord8.0.2indirect
RubyGemsactivestorage8.0.2indirect
RubyGemsactivesupport8.0.2indirect
RubyGemsaddressableindirect
RubyGemsaddressable2.8.7indirect
RubyGemsast2.4.3indirect
RubyGemsbase64indirect
RubyGemsbase640.2.0indirect
RubyGemsbase640.3.0indirect
RubyGemsbcrypt_pbkdf1.1.1indirect
RubyGemsbenchmark0.4.0indirect
RubyGemsbigdecimal3.1.9indirect
RubyGemsbigdecimal3.2.2indirect
RubyGemsbindex0.8.1indirect
RubyGemsbootsnap1.18.4indirect
RubyGemsbrakeman7.0.0indirect
RubyGemsbuilder3.3.0indirect
RubyGemscapybara3.40.0indirect
RubyGemscoderay1.1.3indirect
RubyGemsconcurrent-ruby1.3.5indirect
RubyGemsconnection_pool2.5.0indirect
RubyGemscrass1.0.6indirect
RubyGemsdate3.4.1indirect
RubyGemsdebug1.10.0indirect
RubyGemsdiff-lcs1.6.2indirect
RubyGemsdotenv3.1.7indirect
RubyGemsdrb2.2.1indirect
RubyGemsdry-configurable1.3.0indirect
RubyGemsdry-core1.1.0indirect
RubyGemsdry-inflector1.2.0indirect
RubyGemsdry-initializer3.2.0indirect
RubyGemsdry-logic1.6.0indirect
RubyGemsdry-schemaindirect
RubyGemsdry-schema1.14.1indirect
RubyGemsdry-types1.8.2indirect
RubyGemsdry-types1.8.3indirect
RubyGemsed255191.3.0indirect
RubyGemserubi1.13.1indirect
RubyGemset-orbi1.2.11indirect
RubyGemsfugit1.11.1indirect
RubyGemsglobalid1.2.1indirect
RubyGemsi18n1.14.7indirect
RubyGemsimportmap-rails2.1.0indirect
RubyGemsio-console0.8.0indirect
RubyGemsirb1.15.1indirect
RubyGemsjbuilder2.13.0indirect
RubyGemsjsonindirect
RubyGemsjson2.10.2indirect
RubyGemsjson2.12.2indirect
RubyGemskamal2.5.3indirect
RubyGemslanguage_server-protocol3.17.0.5indirect
RubyGemslint_roller1.1.0indirect
RubyGemslogger1.6.6indirect
RubyGemslogger1.7.0indirect
RubyGemsloofah2.24.0indirect
RubyGemsmail2.8.1indirect
RubyGemsmarcel1.0.4indirect
RubyGemsmatrix0.4.2indirect
RubyGemsmethod_source1.1.0indirect
RubyGemsmime-typesindirect
RubyGemsmime-types3.6.2indirect
RubyGemsmime-types3.7.0indirect
RubyGemsmime-types-data3.2025.0318indirect
RubyGemsmime-types-data3.2025.0708indirect
RubyGemsmini_mime1.1.5indirect
RubyGemsminitest5.25.5indirect
RubyGemsmsgpack1.8.0indirect
RubyGemsmustermann3.0.3indirect
RubyGemsnet-imap0.5.6indirect
RubyGemsnet-pop0.1.2indirect
RubyGemsnet-protocol0.2.2indirect
RubyGemsnet-scp4.1.0indirect
RubyGemsnet-sftp4.0.0indirect
RubyGemsnet-smtp0.5.1indirect
RubyGemsnet-ssh7.3.0indirect
RubyGemsnio4r2.7.4indirect
RubyGemsnokogiri1.18.6indirect
RubyGemsostruct0.6.1indirect
RubyGemsparallel1.27.0indirect
RubyGemsparser3.3.8.0indirect
RubyGemspp0.6.2indirect
RubyGemsprettyprint0.2.0indirect
RubyGemsprism1.4.0indirect
RubyGemspropshaft1.1.0indirect
RubyGemspry0.15.2indirect
RubyGemspsych5.2.3indirect
RubyGemspublic_suffix6.0.1indirect
RubyGemspublic_suffix6.0.2indirect
RubyGemsraabro1.4.0indirect
RubyGemsracc1.8.1indirect
RubyGemsrackindirect
RubyGemsrack3.1.12indirect
RubyGemsrack3.1.16indirect
RubyGemsrack-protection4.1.1indirect
RubyGemsrack-session2.1.0indirect
RubyGemsrack-session2.1.1indirect
RubyGemsrack-test2.2.0indirect
RubyGemsrails8.0.2indirect
RubyGemsrails-dom-testing2.2.0indirect
RubyGemsrails-html-sanitizer1.6.2indirect
RubyGemsrailties8.0.2indirect
RubyGemsrainbow3.1.1indirect
RubyGemsrake13.2.1indirect
RubyGemsrake13.3.0indirect
RubyGemsrdoc6.13.0indirect
RubyGemsregexp_parser2.10.0indirect
RubyGemsreline0.6.0indirect
RubyGemsrexml3.4.1indirect
RubyGemsrspec3.13.1indirect
RubyGemsrspec-core3.13.5indirect
RubyGemsrspec-expectations3.13.5indirect
RubyGemsrspec-mocks3.13.5indirect
RubyGemsrspec-support3.13.4indirect
RubyGemsrubocop1.78.0indirect
RubyGemsrubocop-ast1.45.1indirect
RubyGemsrubocop-rspec3.6.0indirect
RubyGemsruby-progressbar1.13.0indirect
RubyGemsruby2_keywords0.0.5indirect
RubyGemsrubyzip2.4.1indirect
RubyGemssecurerandom0.4.1indirect
RubyGemsselenium-webdriver4.30.1indirect
RubyGemssolid_cable3.0.7indirect
RubyGemssolid_cache1.0.7indirect
RubyGemssolid_queue1.1.4indirect
RubyGemssqlite32.6.0indirect
RubyGemssshkit1.24.0indirect
RubyGemsstimulus-rails1.3.4indirect
RubyGemsstringio3.1.5indirect
RubyGemsthor1.3.2indirect
RubyGemsthruster0.1.12indirect
RubyGemstilt2.6.1indirect
RubyGemstimeout0.4.3indirect
RubyGemsturbo-rails2.0.13indirect
RubyGemstzinfo2.0.6indirect
RubyGemsunicode-display_width3.1.4indirect
RubyGemsunicode-emoji4.0.4indirect
RubyGemsuri1.0.3indirect
RubyGemsuseragent0.16.11indirect
RubyGemsweb-console4.2.1indirect
RubyGemswebsocket1.2.11indirect
RubyGemswebsocket-driver0.7.7indirect
RubyGemswebsocket-extensions0.1.5indirect
RubyGemsxpath3.2.0indirect
RubyGemszeitwerk2.7.2indirect
RubyGemszeitwerk2.7.3indirect
Dependency advisories 17

This repository publishes no package the index resolves, so its own dependency graph was assessed — 150 packages, which also include development and test pins that never ship: 17 carry known advisories, of which 2 are direct. 6 could not be assessed — no resolved version, an unsupported ecosystem, or beyond the reported package list.

PackageVersionRelationSeverityAdvisoriesFixed in
activestorage8.0.2indirectcritical68.1.2.1
rack-session2.1.0indirectcritical22.1.2
rack-session2.1.1indirectcritical12.1.2
puma6.6.0directhigh28.0.2
activesupport8.0.2indirecthigh38.1.2.1
addressable2.8.7indirecthigh12.9.0
concurrent-ruby1.3.5indirecthigh31.3.7
net-imap0.5.6indirecthigh90.6.4.1
nokogiri1.18.6indirecthigh131.19.4
rack3.1.12indirecthigh213.2.6
rack3.1.16indirecthigh193.2.6
uri1.0.3indirecthigh11.0.4
sinatra4.1.1directmoderate14.2.0
activerecord8.0.2indirectmoderate18.0.2.1
rexml3.4.1indirectmoderate13.4.2
websocket-driver0.7.7indirectmoderate30.8.1
actionview8.0.2indirectlow18.1.2.1

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

Feedback

Spotted something off in this report, or have thoughts to share? Wrong measurements, missed tooling, ideas, questions — anything is welcome. Every message is read and gets a response.

The message is kept through sign-in.

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 v0.16.0 — full methodology · metrics wiki.

How one result sits in the wider record: aggregate statisticsRubyGems.