{"id":50432888,"url":"https://github.com/ruby-oauth/oauth2-mcp","last_synced_at":"2026-05-31T15:02:02.364Z","repository":{"id":360906123,"uuid":"1237548961","full_name":"ruby-oauth/oauth2-mcp","owner":"ruby-oauth","description":"🔮 Rack/Roda-compatible resource-server toolkit for Oauth2.1 MCP 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FLOSS Logo by Aboling0, CC BY-SA 4.0][🖼️galtzo-floss-i]][🖼️galtzo-floss] [![ruby-lang Logo, Yukihiro Matsumoto, Ruby Visual Identity Team, CC BY-SA 2.5][🖼️ruby-lang-i]][🖼️ruby-lang] [![ruby-oauth Logo by Chris Messina, CC BY-SA 3.0][🖼️oauth-i]][🖼️oauth]\n\n[🖼️galtzo-floss-i]: https://logos.galtzo.com/assets/images/galtzo-floss/avatar-192px.svg\n[🖼️galtzo-floss]: https://discord.gg/3qme4XHNKN\n[🖼️ruby-lang-i]: https://logos.galtzo.com/assets/images/ruby-lang/avatar-192px.svg\n[🖼️ruby-lang]: https://www.ruby-lang.org/\n[🖼️oauth-i]: https://logos.galtzo.com/assets/images/oauth/avatar-192px.svg\n[🖼️oauth]: https://github.com/ruby-oauth\n\n# 🔮 OAuth2::MCP\n\n[![Version][👽versioni]][👽version] [![GitHub tag (latest SemVer)][⛳️tag-img]][⛳️tag] [![License: MIT][📄license-img]][📄license] [![Downloads Rank][👽dl-ranki]][👽dl-rank] [![CodeCov Test Coverage][🏀codecovi]][🏀codecov] [![Coveralls Test Coverage][🏀coveralls-img]][🏀coveralls] [![QLTY Test Coverage][🏀qlty-covi]][🏀qlty-cov] [![QLTY Maintainability][🏀qlty-mnti]][🏀qlty-mnt] [![CI Heads][🚎3-hd-wfi]][🚎3-hd-wf] [![CI Runtime Dependencies @ HEAD][🚎12-crh-wfi]][🚎12-crh-wf] [![CI Current][🚎11-c-wfi]][🚎11-c-wf] [![CI Truffle Ruby][🚎9-t-wfi]][🚎9-t-wf] [![CI JRuby][🚎10-j-wfi]][🚎10-j-wf] [![Deps Locked][🚎13-🔒️-wfi]][🚎13-🔒️-wf] [![Deps Unlocked][🚎14-🔓️-wfi]][🚎14-🔓️-wf] [![CI Test Coverage][🚎2-cov-wfi]][🚎2-cov-wf] [![CI Style][🚎5-st-wfi]][🚎5-st-wf] [![Apache SkyWalking Eyes License Compatibility Check][🚎15-🪪-wfi]][🚎15-🪪-wf]\n\n`if ci_badges.map(\u0026:color).detect { it != \"green\"}` ☝️ [let me know][🖼️galtzo-floss], as I may have missed the [discord notification][🖼️galtzo-floss].\n\n---\n\n`if ci_badges.map(\u0026:color).all? { it == \"green\"}` 👇️ send money so I can do more of this. FLOSS maintenance is now my full-time job.\n\n[![Sponsor Me on Github][🖇sponsor-img]][🖇sponsor] [![Liberapay Goal Progress][⛳liberapay-img]][⛳liberapay] [![Donate on PayPal][🖇paypal-img]][🖇paypal] [![Buy me a coffee][🖇buyme-small-img]][🖇buyme] [![Donate on Polar][🖇polar-img]][🖇polar] [![Donate at ko-fi.com][🖇kofi-img]][🖇kofi]\n\n\u003cdetails\u003e\n \u003csummary\u003e👣 How will this project approach the September 2025 hostile takeover of RubyGems? 🚑️\u003c/summary\u003e\n\nI've summarized my thoughts in [this blog post](https://dev.to/galtzo/hostile-takeover-of-rubygems-my-thoughts-5hlo).\n\n\u003c/details\u003e\n\n## 🌻 Synopsis\n\n`oauth2-mcp` is a Ruby resource-server toolkit for securing HTTP Model Context\nProtocol servers with OAuth 2.1-style bearer authorization.\n\nIt builds on the `oauth2` gem for the Ruby OAuth/OIDC substrate and adds the MCP\nresource-server pieces that generic OAuth clients do not provide.\n\nThe gem is intentionally focused on the MCP server side:\n\n- protected-resource metadata for MCP endpoint discovery;\n- `WWW-Authenticate` bearer challenges;\n- scope and capability mapping for application policy layers;\n- provider adapters for WorkOS/AuthKit and generic OIDC/JWKS validation;\n- explicit audience/resource validation so tokens cannot be replayed against\n  another MCP server.\n\nToken passthrough is not a supported pattern. MCP servers should validate the\nincoming token for their own resource and issue separate downstream credentials\nwhen calling other services. Successful authorization results expose normalized\nclaims and mapped capabilities, not the raw bearer token.\n\n## 💡 Info you can shake a stick at\n\n| Tokens to Remember | [![Gem name][⛳️name-img]][⛳️gem-name] [![Gem namespace][⛳️namespace-img]][⛳️gem-namespace] |\n|-------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| Works with JRuby | [![JRuby current Compat][💎jruby-c-i]][🚎10-j-wf] [![JRuby HEAD Compat][💎jruby-headi]][🚎3-hd-wf]|\n| Works with Truffle Ruby | [![Truffle Ruby 24.2 Compat][💎truby-24.2i]][🚎truby-24.2-wf] [![Truffle Ruby 25.0 Compat][💎truby-25.0i]][🚎truby-25.0-wf] [![Truffle Ruby current Compat][💎truby-c-i]][🚎9-t-wf]|\n| Works with MRI Ruby 4 | [![Ruby 4.0 Compat][💎ruby-4.0i]][🚎11-c-wf] [![Ruby current Compat][💎ruby-c-i]][🚎11-c-wf] [![Ruby HEAD Compat][💎ruby-headi]][🚎3-hd-wf]|\n| Works with MRI Ruby 3 | [![Ruby 3.2 Compat][💎ruby-3.2i]][🚎ruby-3.2-wf] [![Ruby 3.3 Compat][💎ruby-3.3i]][🚎ruby-3.3-wf] [![Ruby 3.4 Compat][💎ruby-3.4i]][🚎ruby-3.4-wf]|\n| Support \u0026 Community | [![Join Me on Daily.dev's RubyFriends][✉️ruby-friends-img]][✉️ruby-friends] [![Live Chat on Discord][✉️discord-invite-img-ftb]][✉️discord-invite] [![Get help from me on Upwork][👨🏼‍🏫expsup-upwork-img]][👨🏼‍🏫expsup-upwork] [![Get help from me on Codementor][👨🏼‍🏫expsup-codementor-img]][👨🏼‍🏫expsup-codementor] |\n| Source | [![Source on GitLab.com][📜src-gl-img]][📜src-gl] [![Source on CodeBerg.org][📜src-cb-img]][📜src-cb] [![Source on Github.com][📜src-gh-img]][📜src-gh] [![The best SHA: dQw4w9WgXcQ!][🧮kloc-img]][🧮kloc] |\n| Documentation | [![Current release on RubyDoc.info][📜docs-cr-rd-img]][🚎yard-current] [![YARD on Galtzo.com][📜docs-head-rd-img]][🚎yard-head] [![Maintainer Blog][🚂maint-blog-img]][🚂maint-blog] [![GitLab Wiki][📜gl-wiki-img]][📜gl-wiki] [![GitHub Wiki][📜gh-wiki-img]][📜gh-wiki] |\n| Compliance | [![License: MIT][📄license-img]][📄license] [![Apache license compatibility: Category A][📄license-compat-img]][📄license-compat] [![📄ilo-declaration-img]][📄ilo-declaration] [![Security Policy][🔐security-img]][🔐security] [![Contributor Covenant 2.1][🪇conduct-img]][🪇conduct] [![SemVer 2.0.0][📌semver-img]][📌semver] |\n| Style | [![Enforced Code Style Linter][💎rlts-img]][💎rlts] [![Keep-A-Changelog 1.0.0][📗keep-changelog-img]][📗keep-changelog] [![Gitmoji Commits][📌gitmoji-img]][📌gitmoji] [![Compatibility appraised by: appraisal2][💎appraisal2-img]][💎appraisal2] |\n| Maintainer 🎖️ | [![Follow Me on LinkedIn][💖🖇linkedin-img]][💖🖇linkedin] [![Follow Me on Ruby.Social][💖🐘ruby-mast-img]][💖🐘ruby-mast] [![Follow Me on Bluesky][💖🦋bluesky-img]][💖🦋bluesky] [![Contact Maintainer][🚂maint-contact-img]][🚂maint-contact] [![My technical writing][💖💁🏼‍♂️devto-img]][💖💁🏼‍♂️devto] |\n| `...` 💖 | [![Find Me on WellFound:][💖✌️wellfound-img]][💖✌️wellfound] [![Find Me on CrunchBase][💖💲crunchbase-img]][💖💲crunchbase] [![My LinkTree][💖🌳linktree-img]][💖🌳linktree] [![More About Me][💖💁🏼‍♂️aboutme-img]][💖💁🏼‍♂️aboutme] [🧊][💖🧊berg] [🐙][💖🐙hub] [🛖][💖🛖hut] [🧪][💖🧪lab] |\n\n### Compatibility\n\nCompatible with MRI Ruby 3.2.0+, and concordant releases of JRuby, and TruffleRuby.\nCI workflows and Appraisals are generated for MRI Ruby 3.2.0+.\nThis test floor is configured by `ruby.test_minimum` in `.kettle-jem.yml` and\nmay be higher than the gem's runtime compatibility floor when legacy Rubies are\nnot practical for the current toolchain.\n\n| 🚚 _Amazing_ test matrix was brought to you by | 🔎 appraisal2 🔎 and the color 💚 green 💚 |\n|------------------------------------------------|--------------------------------------------------------|\n| 👟 Check it out! | ✨ [github.com/appraisal-rb/appraisal2][💎appraisal2] ✨ |\n\n\n\n### Federated DVCS\n\n\u003cdetails markdown=\"1\"\u003e\n \u003csummary\u003eFind this repo on federated forges (Coming soon!)\u003c/summary\u003e\n\n| Federated [DVCS][💎d-in-dvcs] Repository | Status | Issues | PRs | Wiki | CI | Discussions |\n|-------------------------------------------------|-----------------------------------------------------------------------|---------------------------|--------------------------|---------------------------|--------------------------|------------------------------|\n| 🧪 [ruby-oauth/oauth2-mcp on GitLab][📜src-gl] | The Truth | [💚][🤝gl-issues] | [💚][🤝gl-pulls] | [💚][📜gl-wiki] | 🐭 Tiny Matrix | ➖ |\n| 🧊 [ruby-oauth/oauth2-mcp on CodeBerg][📜src-cb] | An Ethical Mirror ([Donate][🤝cb-donate]) | [💚][🤝cb-issues] | [💚][🤝cb-pulls] | ➖ | ⭕️ No Matrix | ➖ |\n| 🐙 [ruby-oauth/oauth2-mcp on GitHub][📜src-gh] | Another Mirror | [💚][🤝gh-issues] | [💚][🤝gh-pulls] | [💚][📜gh-wiki] | 💯 Full Matrix | [💚][gh-discussions] |\n| 🎮️ [Discord Server][✉️discord-invite] | [![Live Chat on Discord][✉️discord-invite-img-ftb]][✉️discord-invite] | [Let's][✉️discord-invite] | [talk][✉️discord-invite] | [about][✉️discord-invite] | [this][✉️discord-invite] | [library!][✉️discord-invite] |\n\n\u003c/details\u003e\n\n[gh-discussions]: https://github.com/ruby-oauth/oauth2-mcp/discussions\n\n### Enterprise Support [![Tidelift](https://tidelift.com/badges/package/rubygems/oauth2-mcp)](https://tidelift.com/subscription/pkg/rubygems-oauth2-mcp?utm_source=rubygems-oauth2-mcp\u0026utm_medium=referral\u0026utm_campaign=readme)\n\nAvailable as part of the Tidelift Subscription.\n\n\u003cdetails markdown=\"1\"\u003e\n \u003csummary\u003eNeed enterprise-level guarantees?\u003c/summary\u003e\n\nThe maintainers of this and thousands of other packages are working with Tidelift to deliver commercial support and maintenance for the open source packages you use to build your applications. Save time, reduce risk, and improve code health, while paying the maintainers of the exact packages you use.\n\n[![Get help from me on Tidelift][🏙️entsup-tidelift-img]][🏙️entsup-tidelift]\n\n- 💡Subscribe for support guarantees covering _all_ your FLOSS dependencies\n- 💡Tidelift is part of [Sonar][🏙️entsup-tidelift-sonar]\n- 💡Tidelift pays maintainers to maintain the software you depend on!\u003cbr/\u003e📊`@`Pointy Haired Boss: An [enterprise support][🏙️entsup-tidelift] subscription is \"[never gonna let you down][🧮kloc]\", and *supports* open source maintainers\n\nAlternatively:\n\n- [![Live Chat on Discord][✉️discord-invite-img-ftb]][✉️discord-invite]\n- [![Get help from me on Upwork][👨🏼‍🏫expsup-upwork-img]][👨🏼‍🏫expsup-upwork]\n- [![Get help from me on Codementor][👨🏼‍🏫expsup-codementor-img]][👨🏼‍🏫expsup-codementor]\n\n\u003c/details\u003e\n\n## ✨ Installation\n\nInstall the gem and add to the application's Gemfile by executing:\n\n```console\nbundle add oauth2-mcp\n```\n\nIf bundler is not being used to manage dependencies, install the gem by executing:\n\n```console\ngem install oauth2-mcp\n```\n\n## ⚙️ Configuration\n\n`oauth2-mcp` does not use global configuration. Build the objects that match the\nOAuth provider and MCP endpoint you are protecting, then pass those objects to a\nresource server or Rack middleware.\n\nThe core resource metadata is the MCP resource URI, the authorization server\nissuer(s), and the scopes your endpoint understands:\n\n```ruby\nmetadata = OAuth2::MCP::ProtectedResourceMetadata.new(\n  resource: \"https://brain.example.com/mcp\",\n  authorization_servers: [\"https://example.authkit.app\"],\n  scopes_supported: %w[memory.read memory.write],\n)\n```\n\nToken validation is supplied by one of the validator adapters:\n\n- `OAuth2::MCP::JWTValidator` for JWT bearer tokens when you already have JWKS.\n- `OAuth2::MCP::OIDCDiscovery` when the authorization server exposes OIDC\n  discovery and JWKS metadata.\n- `OAuth2::MCP::WorkOSAuthKit` for WorkOS AuthKit resource-server JWTs.\n- `OAuth2::MCP::IntrospectionValidator` for opaque tokens validated through an\n  OAuth token introspection endpoint.\n\nMap provider scopes to application capabilities with `ScopeMapper` when the MCP\nserver needs internal permission names:\n\n```ruby\nscope_mapper = OAuth2::MCP::ScopeMapper.new(\n  mapping: {\n    \"memory.read\" =\u003e \"documents_read\",\n    \"memory.write\" =\u003e \"documents_write\",\n  },\n)\n```\n\nFinally, configure the resource server with the metadata URL you publish to\nclients. That URL is emitted in `WWW-Authenticate` challenges so clients can\ndiscover how to obtain an acceptable token.\n\n```ruby\nresource_server = OAuth2::MCP::ResourceServer.new(\n  resource_metadata: metadata,\n  resource_metadata_url: \"https://brain.example.com/.well-known/oauth-protected-resource/mcp\",\n  validator: validator,\n  scope_mapper: scope_mapper,\n)\n```\n\n## 🔧 Basic Usage\n\nBuild protected-resource metadata for an MCP endpoint:\n\n```ruby\nmetadata = OAuth2::MCP::ProtectedResourceMetadata.new(\n  resource: \"https://brain.example.com/mcp\",\n  authorization_servers: [\"https://example.authkit.app\"],\n  scopes_supported: %w[memory.read memory.write],\n)\n\nmetadata.to_json\n```\n\nReturn a bearer challenge when authorization is missing or insufficient:\n\n```ruby\nchallenge = OAuth2::MCP::BearerChallenge.new(\n  resource_metadata: \"https://brain.example.com/.well-known/oauth-protected-resource/mcp\",\n  scope: %w[memory.read],\n  error: \"insufficient_scope\",\n  error_description: \"memory.read is required\",\n)\n\nheaders[\"WWW-Authenticate\"] = challenge.to_header\n```\n\nAuthorize an MCP HTTP request with a provider-specific token validator:\n\n```ruby\nmetadata = OAuth2::MCP::ProtectedResourceMetadata.new(\n  resource: \"https://brain.example.com/mcp\",\n  authorization_servers: [\"https://example.authkit.app\"],\n  scopes_supported: %w[memory.read memory.write],\n)\n\nvalidator = OAuth2::MCP::JWTValidator.new(\n  jwks: {\"keys\" =\u003e provider_jwks},\n  issuer: \"https://example.authkit.app\",\n  audience: \"https://brain.example.com/mcp\",\n)\n\nscope_mapper = OAuth2::MCP::ScopeMapper.new(\n  mapping: {\n    \"memory.read\" =\u003e \"documents_read\",\n    \"memory.write\" =\u003e \"documents_write\",\n  },\n)\n\nresource_server = OAuth2::MCP::ResourceServer.new(\n  resource_metadata: metadata,\n  resource_metadata_url: \"https://brain.example.com/.well-known/oauth-protected-resource/mcp\",\n  validator: validator,\n  scope_mapper: scope_mapper,\n)\n\nresult = resource_server.authorize(\n  request: rack_env,\n  scopes: [\"memory.read\"],\n)\n\nhalt result.status, result.headers, \"\" unless result.allowed?\n```\n\nProtect a Rack-compatible MCP HTTP endpoint:\n\n```ruby\nuse OAuth2::MCP::RackMiddleware,\n  resource_server: resource_server,\n  scopes: [\"memory.read\"]\n```\n\nOr build the validator from OIDC discovery:\n\n```ruby\nvalidator = OAuth2::MCP::OIDCDiscovery.new(\n  issuer: \"https://example.authkit.app\",\n).jwt_validator(\n  audience: \"https://brain.example.com/mcp\",\n)\n```\n\nFor WorkOS AuthKit, use the provider adapter. It validates against the AuthKit\nissuer and `/oauth2/jwks` endpoint:\n\n```ruby\nvalidator = OAuth2::MCP::WorkOSAuthKit.new(\n  subdomain: \"acme\",\n  audience: \"https://brain.example.com/mcp\",\n)\n```\n\nFor opaque access tokens, use OAuth token introspection with an `OAuth2::Client`\nconfigured for the authorization server:\n\n```ruby\nvalidator = OAuth2::MCP::IntrospectionValidator.new(\n  client: oauth_client,\n  introspection_url: \"https://auth.example.com/oauth2/introspection\",\n  audience: \"https://brain.example.com/mcp\",\n  issuer: \"https://auth.example.com\",\n)\n```\n\n## 🦷 FLOSS Funding\n\nWhile ruby-oauth tools are free software and will always be, the project would benefit immensely from some funding.\nRaising a monthly budget of... \"dollars\" would make the project more sustainable.\n\nWe welcome both individual and corporate sponsors! We also offer a\nwide array of funding channels to account for your preferences.\nCurrently, [GitHub Sponsors][🖇sponsor], and [Liberapay][⛳liberapay] are our preferred funding platforms.\n\n**If you're working in a company that's making significant use of ruby-oauth tools we'd\nappreciate it if you suggest to your company to become a ruby-oauth sponsor.**\n\nYou can support the development of ruby-oauth tools via\n[GitHub Sponsors][🖇sponsor],\n[Liberapay][⛳liberapay],\n[PayPal][🖇paypal],\nand [Tidelift][🏙️entsup-tidelift].\n\n| 📍 NOTE |\n|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| If doing a sponsorship in the form of donation is problematic for your company \u003cbr/\u003e from an accounting standpoint, we'd recommend the use of Tidelift, \u003cbr/\u003e where you can get a support-like subscription instead. |\n\n\n### Another way to support open-source\n\nI’m driven by a passion to foster a thriving open-source community – a space where people can tackle complex problems, no matter how small. Revitalizing libraries that have fallen into disrepair, and building new libraries focused on solving real-world challenges, are my passions. I was recently affected by layoffs, and the tech jobs market is unwelcoming. I’m reaching out here because your support would significantly aid my efforts to provide for my family, and my farm (11 🐔 chickens, 2 🐶 dogs, 3 🐰 rabbits, 8 🐈‍ cats).\n\nIf you work at a company that uses my work, please encourage them to support me as a corporate sponsor. My work on gems you use might show up in `bundle fund`.\n\nI’m developing a new library, [floss_funding][🖇floss-funding-gem], designed to empower open-source developers like myself to get paid for the work we do, in a sustainable way. Please give it a look.\n\n**[Floss-Funding.dev][🖇floss-funding.dev]: 👉️ No network calls. 👉️ No tracking. 👉️ No oversight. 👉️ Minimal crypto hashing. 💡 Easily disabled nags**\n\n [![Sponsor Me on Github][🖇sponsor-img]][🖇sponsor] [![Liberapay Goal Progress][⛳liberapay-img]][⛳liberapay] [![Donate on PayPal][🖇paypal-img]][🖇paypal] [![Buy me a coffee][🖇buyme-small-img]][🖇buyme] [![Donate on Polar][🖇polar-img]][🖇polar] [![Donate to my FLOSS efforts at ko-fi.com][🖇kofi-img]][🖇kofi] [![Donate to my FLOSS efforts using Patreon][🖇patreon-img]][🖇patreon]\n\n## 🔐 Security\n\nSee [SECURITY.md][🔐security].\n\n## 🤝 Contributing\n\nIf you need some ideas of where to help, you could work on adding more code coverage,\nor if it is already 💯 (see [below](#code-coverage)) check [issues][🤝gh-issues] or [PRs][🤝gh-pulls],\nor use the gem and think about how it could be better.\n\nWe [![Keep A Changelog][📗keep-changelog-img]][📗keep-changelog] so if you make changes, remember to update it.\n\nSee [CONTRIBUTING.md][🤝contributing] for more detailed instructions.\n\n### 🚀 Release Instructions\n\nSee [CONTRIBUTING.md][🤝contributing].\n\n### Code Coverage\n\n\u003cdetails markdown=\"1\"\u003e\n\u003csummary\u003eCoverage service badges\u003c/summary\u003e\n\n[![Coverage Graph][🏀codecov-g]][🏀codecov]\n\n[![Coveralls Test Coverage][🏀coveralls-img]][🏀coveralls]\n\n[![QLTY Test Coverage][🏀qlty-covi]][🏀qlty-cov]\n\n\u003c/details\u003e\n\n### 🪇 Code of Conduct\n\nEveryone interacting with this project's codebases, issue trackers,\nchat rooms and mailing lists agrees to follow the [![Contributor Covenant 2.1][🪇conduct-img]][🪇conduct].\n\n## 🌈 Contributors\n\n[![Contributors][🖐contributors-img]][🖐contributors]\n\nMade with [contributors-img][🖐contrib-rocks].\n\nAlso see GitLab Contributors: [https://gitlab.com/ruby-oauth/oauth2-mcp/-/graphs/main][🚎contributors-gl]\n\n\u003cdetails\u003e\n \u003csummary\u003e⭐️ Star History\u003c/summary\u003e\n\n\u003ca href=\"https://star-history.com/ruby-oauth/oauth2-mcp\u0026Date\"\u003e\n \u003cpicture\u003e\n \u003csource media=\"(prefers-color-scheme: dark)\" srcset=\"https://api.star-history.com/svg?repos=ruby-oauth/oauth2-mcp\u0026type=Date\u0026theme=dark\" /\u003e\n \u003csource media=\"(prefers-color-scheme: light)\" srcset=\"https://api.star-history.com/svg?repos=ruby-oauth/oauth2-mcp\u0026type=Date\" /\u003e\n \u003cimg alt=\"Star History Chart\" src=\"https://api.star-history.com/svg?repos=ruby-oauth/oauth2-mcp\u0026type=Date\" /\u003e\n \u003c/picture\u003e\n\u003c/a\u003e\n\n\u003c/details\u003e\n\n## 📌 Versioning\n\nThis library follows [![Semantic Versioning 2.0.0][📌semver-img]][📌semver] for its public API where practical.\nFor most applications, prefer the [Pessimistic Version Constraint][📌pvc] with two digits of precision.\n\nFor example:\n\n```ruby\nspec.add_dependency(\"oauth2-mcp\", \"~\u003e 0.0\")\n```\n\n\u003cdetails markdown=\"1\"\u003e\n\u003csummary\u003e📌 Is \"Platform Support\" part of the public API? More details inside.\u003c/summary\u003e\n\nDropping support for a platform can be a breaking change for affected users.\nIf a release changes supported platforms, it should be called out clearly in the changelog and versioned with that impact in mind.\n\nTo get a better understanding of how SemVer is intended to work over a project's lifetime,\nread this article from the creator of SemVer:\n\n- [\"Major Version Numbers are Not Sacred\"][📌major-versions-not-sacred]\n\n\u003c/details\u003e\n\nSee [CHANGELOG.md][📌changelog] for a list of releases.\n\n## 📄 License\n\nThe gem is available as open source under the terms of\nthe [MIT](MIT.md) [![License: MIT][📄license-img]][📄license-ref].\n\n### © Copyright\n\nSee [LICENSE.md][📄license] for the official copyright notice.\n\n\u003cdetails markdown=\"1\"\u003e\n\u003csummary\u003eCopyright holders\u003c/summary\u003e\n\n- Copyright (c) 2026 Peter H. Boling\n\n\u003c/details\u003e\n\n## 🤑 A request for help\n\nMaintainers have teeth and need to pay their dentists.\nAfter getting laid off in an RIF in March, and encountering difficulty finding a new one,\nI began spending most of my time building open source tools.\nI'm hoping to be able to pay for my kids' health insurance this month,\nso if you value the work I am doing, I need your support.\nPlease consider sponsoring me or the project.\n\nTo join the community or get help 👇️ Join the Discord.\n\n[![Live Chat on Discord][✉️discord-invite-img-ftb]][✉️discord-invite]\n\nTo say \"thanks!\" ☝️ Join the Discord or 👇️ send money.\n\n[![Sponsor me on GitHub Sponsors][🖇sponsor-bottom-img]][🖇sponsor] 💌 [![Sponsor me on Liberapay][⛳liberapay-bottom-img]][⛳liberapay] 💌 [![Donate on PayPal][🖇paypal-bottom-img]][🖇paypal]\n\n### Please give the project a star ⭐ ♥.\n\nThanks for RTFM. ☺️\n\n[⛳liberapay-img]: https://img.shields.io/liberapay/goal/pboling.svg?logo=liberapay\u0026color=a51611\u0026style=flat\n[⛳liberapay-bottom-img]: https://img.shields.io/liberapay/goal/pboling.svg?style=for-the-badge\u0026logo=liberapay\u0026color=a51611\n[⛳liberapay]: https://liberapay.com/pboling/donate\n[🖇sponsor-img]: https://img.shields.io/badge/Sponsor_Me!-pboling.svg?style=social\u0026logo=github\n[🖇sponsor-bottom-img]: https://img.shields.io/badge/Sponsor_Me!-pboling-blue?style=for-the-badge\u0026logo=github\n[🖇sponsor]: https://github.com/sponsors/pboling\n[🖇polar-img]: https://img.shields.io/badge/polar-donate-a51611.svg?style=flat\n[🖇polar]: https://polar.sh/pboling\n[🖇kofi-img]: https://img.shields.io/badge/ko--fi-%E2%9C%93-a51611.svg?style=flat\n[🖇kofi]: https://ko-fi.com/pboling\n[🖇patreon-img]: https://img.shields.io/badge/patreon-donate-a51611.svg?style=flat\n[🖇patreon]: https://patreon.com/galtzo\n[🖇buyme-small-img]: 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https://img.shields.io/badge/blog-railsbling-0093D0.svg?style=for-the-badge\u0026logo=rubyonrails\u0026logoColor=orange\n[🚂maint-contact]: http://www.railsbling.com/contact\n[🚂maint-contact-img]: https://img.shields.io/badge/Contact-Maintainer-0093D0.svg?style=flat\u0026logo=rubyonrails\u0026logoColor=red\n[💖🖇linkedin]: http://www.linkedin.com/in/peterboling\n[💖🖇linkedin-img]: https://img.shields.io/badge/LinkedIn-Profile-0B66C2?style=flat\u0026logo=newjapanprowrestling\n[💖✌️wellfound]: https://wellfound.com/u/peter-boling\n[💖✌️wellfound-img]: https://img.shields.io/badge/peter--boling-orange?style=flat\u0026logo=wellfound\n[💖💲crunchbase]: https://www.crunchbase.com/person/peter-boling\n[💖💲crunchbase-img]: https://img.shields.io/badge/peter--boling-purple?style=flat\u0026logo=crunchbase\n[💖🐘ruby-mast]: https://ruby.social/@galtzo\n[💖🐘ruby-mast-img]: https://img.shields.io/mastodon/follow/109447111526622197?domain=https://ruby.social\u0026style=flat\u0026logo=mastodon\u0026label=Ruby%20@galtzo\n[💖🦋bluesky]: https://bsky.app/profile/galtzo.com\n[💖🦋bluesky-img]: https://img.shields.io/badge/@galtzo.com-0285FF?style=flat\u0026logo=bluesky\u0026logoColor=white\n[💖🌳linktree]: https://linktr.ee/galtzo\n[💖🌳linktree-img]: https://img.shields.io/badge/galtzo-purple?style=flat\u0026logo=linktree\n[💖💁🏼‍♂️devto]: https://dev.to/galtzo\n[💖💁🏼‍♂️devto-img]: https://img.shields.io/badge/dev.to-0A0A0A?style=flat\u0026logo=devdotto\u0026logoColor=white\n[💖💁🏼‍♂️aboutme]: https://about.me/peter.boling\n[💖💁🏼‍♂️aboutme-img]: https://img.shields.io/badge/about.me-0A0A0A?style=flat\u0026logo=aboutme\u0026logoColor=white\n[💖🧊berg]: https://codeberg.org/pboling\n[💖🐙hub]: https://github.org/pboling\n[💖🛖hut]: https://sr.ht/~galtzo/\n[💖🧪lab]: https://gitlab.com/pboling\n[👨🏼‍🏫expsup-upwork]: https://www.upwork.com/freelancers/~014942e9b056abdf86?mp_source=share\n[👨🏼‍🏫expsup-upwork-img]: https://img.shields.io/badge/UpWork-13544E?style=for-the-badge\u0026logo=Upwork\u0026logoColor=white\n[👨🏼‍🏫expsup-codementor]: https://www.codementor.io/peterboling?utm_source=github\u0026utm_medium=button\u0026utm_term=peterboling\u0026utm_campaign=github\n[👨🏼‍🏫expsup-codementor-img]: https://img.shields.io/badge/CodeMentor-Get_Help-1abc9c?style=for-the-badge\u0026logo=CodeMentor\u0026logoColor=white\n[🏙️entsup-tidelift]: https://tidelift.com/subscription/pkg/rubygems-oauth2-mcp?utm_source=rubygems-oauth2-mcp\u0026utm_medium=referral\u0026utm_campaign=readme\n[🏙️entsup-tidelift-img]: https://img.shields.io/badge/Tidelift_and_Sonar-Enterprise_Support-FD3456?style=for-the-badge\u0026logo=sonar\u0026logoColor=white\n[🏙️entsup-tidelift-sonar]: https://blog.tidelift.com/tidelift-joins-sonar\n[💁🏼‍♂️peterboling]: http://www.peterboling.com\n[🚂railsbling]: http://www.railsbling.com\n[📜src-gl-img]: https://img.shields.io/badge/GitLab-FBA326?style=for-the-badge\u0026logo=Gitlab\u0026logoColor=orange\n[📜src-gl]: https://gitlab.com/ruby-oauth/oauth2-mcp/-/tree/main/gems/oauth2-mcp\n[📜src-cb-img]: https://img.shields.io/badge/CodeBerg-4893CC?style=for-the-badge\u0026logo=CodeBerg\u0026logoColor=blue\n[📜src-cb]: https://codeberg.org/ruby-oauth/oauth2-mcp/src/branch/main/gems/oauth2-mcp\n[📜src-gh-img]: https://img.shields.io/badge/GitHub-238636?style=for-the-badge\u0026logo=Github\u0026logoColor=green\n[📜src-gh]: https://github.com/ruby-oauth/oauth2-mcp/tree/main/gems/oauth2-mcp\n[📜docs-cr-rd-img]: https://img.shields.io/badge/RubyDoc-Current_Release-943CD2?style=for-the-badge\u0026logo=readthedocs\u0026logoColor=white\n[📜docs-head-rd-img]: https://img.shields.io/badge/YARD_on_Galtzo.com-HEAD-943CD2?style=for-the-badge\u0026logo=readthedocs\u0026logoColor=white\n[📜gl-wiki]: https://gitlab.com/ruby-oauth/oauth2-mcp/-/wikis/home\n[📜gh-wiki]: 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https://coveralls.io/github/ruby-oauth/oauth2-mcp?branch=main\n[🏀coveralls-img]: https://coveralls.io/repos/github/ruby-oauth/oauth2-mcp/badge.svg?branch=main\n[🚎ruby-3.2-wf]: https://github.com/ruby-oauth/oauth2-mcp/actions/workflows/ruby-3.2.yml\n[🚎ruby-3.3-wf]: https://github.com/ruby-oauth/oauth2-mcp/actions/workflows/ruby-3.3.yml\n[🚎ruby-3.4-wf]: https://github.com/ruby-oauth/oauth2-mcp/actions/workflows/ruby-3.4.yml\n[🚎truby-24.2-wf]: https://github.com/ruby-oauth/oauth2-mcp/actions/workflows/truffleruby-24.2.yml\n[🚎truby-25.0-wf]: https://github.com/ruby-oauth/oauth2-mcp/actions/workflows/truffleruby-25.0.yml\n[🚎2-cov-wf]: https://github.com/ruby-oauth/oauth2-mcp/actions/workflows/coverage.yml\n[🚎2-cov-wfi]: https://github.com/ruby-oauth/oauth2-mcp/actions/workflows/coverage.yml/badge.svg\n[🚎3-hd-wf]: https://github.com/ruby-oauth/oauth2-mcp/actions/workflows/heads.yml\n[🚎3-hd-wfi]: https://github.com/ruby-oauth/oauth2-mcp/actions/workflows/heads.yml/badge.svg\n[🚎5-st-wf]: 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