[dependabot]

Bumps the production-dependencies group with 3 updates in the / directory: @modelcontextprotocol/node, @modelcontextprotocol/server and zod.

Updates @modelcontextprotocol/node from 2.0.0 to 2.1.1

Release notes

Sourced from @​modelcontextprotocol/node's releases.

@​modelcontextprotocol/node@​2.1.1

Patch Changes

• #2897 7f4c12a Thanks @​claude! - hono is now a regular dependency of @modelcontextprotocol/node, so installs with strict peer-dependency checking no longer fail on the hono peer that @hono/node-server requires. No runtime change.

• #2918 84804c2 Thanks @​claude! - A Server or McpServer now serves one connection at a time, and a Streamable HTTP server transport without sessions (sessionIdGenerator: undefined) serves one request. An app that uses one server object, or one stateless transport, for every HTTP request fails on the second request after this upgrade. Build the server and the transport per request instead.

  What keeps working without a change:

  • createMcpHandler(buildServer) and serveStdio(buildServer), where buildServer returns a new server on every call.
  • A handler that builds a new server and a new stateless transport for each request.
  • One server and one transport per session (a transport with a sessionIdGenerator).
  • Connecting a server again after close().
  • Client.

  What fails now, how it shows, and what to change:

  • One server object with a new stateless transport per request (const server = new McpServer(...) outside the handler, await server.connect(transport) inside it): the second HTTP request the process receives fails, and so does every later one. connect() rejects with an SdkError of code ALREADY_CONNECTED. If the handler closes the transport when the response ends, requests that arrive one after the other still work and a request that overlaps another one fails. Change: move new McpServer(...) and its registrations into the handler.
  • One stateless transport for every request (a transport built once with sessionIdGenerator: undefined): the second HTTP request fails. WebStandardStreamableHTTPServerTransport.handleRequest() rejects with Stateless transport cannot be reused across requests. Create a new transport per request., and NodeStreamableHTTPServerTransport.handleRequest() answers 500. Change: build the server and the transport inside the handler and connect them there.
  • createMcpHandler(() => server) with a server built once: a request that arrives after the previous response has been read to its end still works. A request that arrives while another one is being served is answered 500 with the JSON-RPC error -32603 (Internal server error); the reason is reported only through the onerror option. Change: pass a function that builds the server, as in createMcpHandler(buildServer).
  • One server object for every session: the initialize request of the second session fails with ALREADY_CONNECTED. Change: build a server per session.

  What the caller sees when connect() or handleRequest() rejects depends on the host. Express 5, Fastify and Hono answer 500. A plain node:http listener without its own error handling gets an unhandled rejection, which ends the process.

  The README examples of @modelcontextprotocol/express, @modelcontextprotocol/fastify, @modelcontextprotocol/hono and @modelcontextprotocol/node, and the handler examples in the JSDoc of WebStandardStreamableHTTPServerTransport and NodeStreamableHTTPServerTransport, now build a server and a transport per request.

• #2908 633dd3e Thanks @​claude! - The license field of the package manifests is now Apache-2.0; the LICENSE file shipped in each package carries the full terms, including the MIT text for earlier contributions. No code change.

• Updated dependencies [40f8f4e, 6d8dbc6, 5238fba, 2fc49ea, 4d94e7b, 84804c2, e55f9ac, 633dd3e, 2237555]:

  • @​modelcontextprotocol/server@​2.3.0

@​modelcontextprotocol/node@​2.1.0

Minor Changes

• #1624 6032170 Thanks @​SamMorrowDrums! - Add request-time OAuth scope challenges for tools, resources, resource templates, and prompts. Each primitive's scopeChallenge callback receives the parsed request and verified authentication info, then either continues or returns the exact scope set for an insufficient_scope response. requireScopes provides a small helper for static all-of checks.

  createMcpHandler and Streamable HTTP transports return HTTP 403 with an insufficient_scope challenge before handler execution or SSE setup. The preflight is active whenever a registered primitive carries a scopeChallenge callback — there is no handler- or transport-level configuration. The challenge's WWW-Authenticate header is built by the same formatter as the bearer-auth 401/403 answers, and its resource_metadata parameter is derived from the verified AuthInfo: requireBearerAuth / verifyBearerToken now stamp their configured resourceMetadataUrl onto the AuthInfo they return (new optional AuthInfo.resourceMetadataUrl field), with a fallback to the well-known location for an HTTP(S) RFC 8707 resource identifier; the parameter is omitted when neither is available.

... (truncated)

Commits

• a202a36 Version Packages (#2896)
• 2d731fa fix(client): refresh again when an SSE retry failed for a reason other than 4...
• b6e5c55 test(e2e): cover prompts/get without arguments for prompts with a schema (#2928)
• 40f8f4e feat(server): add expectedResource to the bearer-token check (#2929)
• 6d8dbc6 feat(server): add maxToolInputElements option to limit the number of elements...
• 2fc49ea fix(server): accept prompts/get requests that omit arguments (#2107)
• 63c0fca fix(client): update eventsource-parser for large SSE responses (#2846)
• 84804c2 fix(server): refuse a second connect and stateless transport reuse (#2918)
• e16d277 docs: close idle sessions and cap the session map in the sessions guide and e...
• 433eb41 fix(client): follow redirects only within the origin of the request (#2901)
• Additional commits viewable in compare view

Updates @modelcontextprotocol/server from 2.0.0 to 2.3.1

Release notes

Sourced from @​modelcontextprotocol/server's releases.

@​modelcontextprotocol/server-legacy@​2.3.1

Patch Changes

• #2952 5a18673 Thanks @​claude! - requireBearerAuth in @modelcontextprotocol/server-legacy takes the optional expectedResource that @modelcontextprotocol/server 2.3.0 and @modelcontextprotocol/sdk 1.32.0 added: the resource the token must be issued for (its audience), usually the server's URL. When it is set, a token is accepted only if the verifier reports that value in AuthInfo.resource; the two are compared as strings, ignoring a fragment and one trailing slash. A token reported for another value, or for none, is answered 401 invalid_token with the usual WWW-Authenticate challenge. When it is not set, nothing changes. The package stays frozen otherwise; this option is added so that its requireBearerAuth matches the 1.x middleware it is a copy of.

• Updated dependencies []:

  • @​modelcontextprotocol/core@​2.3.1

@​modelcontextprotocol/server@​2.3.1

Patch Changes

• Updated dependencies []:
  • @​modelcontextprotocol/core@​2.3.1

@​modelcontextprotocol/server-legacy@​2.3.0

Patch Changes

• #2908 633dd3e Thanks @​claude! - The license field of the package manifests is now Apache-2.0; the LICENSE file shipped in each package carries the full terms, including the MIT text for earlier contributions. No code change.

• Updated dependencies [633dd3e]:

  • @​modelcontextprotocol/core@​2.3.0

@​modelcontextprotocol/server@​2.3.0

Minor Changes

• #2929 40f8f4e Thanks @​claude! - requireBearerAuth and verifyBearerToken take a new optional expectedResource, which makes them accept only tokens issued for this resource (the token's audience). Set it to the value your authorization server puts into tokens meant for this server, usually the server's URL. When it is set, a token is accepted only if the verifier reports that value in AuthInfo.resource; the two are compared as strings, ignoring a fragment and one trailing slash. A token reported for another value, or for none, is answered 401 invalid_token with the usual WWW-Authenticate challenge. When it is not set, nothing changes. To use it, pass expectedResource and have verifyAccessToken fill AuthInfo.resource, for example from the aud claim. The option is declared on a new exported type, VerifyBearerTokenOptions, which extends BearerAuthOptions; BearerAuthOptions itself is unchanged. The Express requireBearerAuth passes the option through. With Express, @modelcontextprotocol/express has to be upgraded to this release as well: 2.0.1 does not pass the option on, so nothing is compared. Its options type does not have the option, so TypeScript reports an expectedResource written in a call to the 2.0.1 requireBearerAuth as an error.

• #2926 6d8dbc6 Thanks @​claude! - McpServer now accepts a maxToolInputElements option that limits the number of elements in tool-call arguments: the largest combined number of array elements and object members a single tools/call arguments payload may contain. It is off by default, so behavior is unchanged unless you set it. When it is set and a call exceeds it, that call is answered with an isError: true tool result that names the limit, before the input schema runs, and the server keeps serving. Set it above the largest arguments your tools legitimately accept; maxRequestBodySize remains the primary limit on request size. The value must be a number of at least 1, or Infinity for no limit; any other value is rejected at construction. The options type is exported as McpServerOptions.

• #2918 84804c2 Thanks @​claude! - A Server or McpServer now serves one connection at a time, and a Streamable HTTP server transport without sessions (sessionIdGenerator: undefined) serves one request. An app that uses one server object, or one stateless transport, for every HTTP request fails on the second request after this upgrade. Build the server and the transport per request instead.

  What keeps working without a change:

  • createMcpHandler(buildServer) and serveStdio(buildServer), where buildServer returns a new server on every call.
  • A handler that builds a new server and a new stateless transport for each request.
  • One server and one transport per session (a transport with a sessionIdGenerator).
  • Connecting a server again after close().
  • Client.

  What fails now, how it shows, and what to change:

  • One server object with a new stateless transport per request (const server = new McpServer(...) outside the handler, await server.connect(transport) inside it): the second HTTP request the process receives fails, and so does every later one. connect() rejects with an SdkError of code ALREADY_CONNECTED. If the handler closes the transport when the response ends, requests that arrive one after the other still work and a request that overlaps another one fails. Change: move new McpServer(...) and its registrations into the handler.
  • One stateless transport for every request (a transport built once with sessionIdGenerator: undefined): the second HTTP request fails. WebStandardStreamableHTTPServerTransport.handleRequest() rejects with Stateless transport cannot be reused across requests. Create a new transport per request., and NodeStreamableHTTPServerTransport.handleRequest() answers 500. Change: build the server and the transport inside the handler and connect them there.
  • createMcpHandler(() => server) with a server built once: a request that arrives after the previous response has been read to its end still works. A request that arrives while another one is being served is answered 500 with the JSON-RPC error -32603 (Internal server error); the reason is reported only through the onerror option. Change: pass a function that builds the server, as in createMcpHandler(buildServer).
  • One server object for every session: the initialize request of the second session fails with ALREADY_CONNECTED. Change: build a server per session.

  What the caller sees when connect() or handleRequest() rejects depends on the host. Express 5, Fastify and Hono answer 500. A plain node:http listener without its own error handling gets an unhandled rejection, which ends the process.

  The README examples of @modelcontextprotocol/express, @modelcontextprotocol/fastify, @modelcontextprotocol/hono and @modelcontextprotocol/node, and the handler examples in the JSDoc of WebStandardStreamableHTTPServerTransport and NodeStreamableHTTPServerTransport, now build a server and a transport per request.

• #2907 e55f9ac Thanks @​claude! - allowedOrigins and validateOriginHeader accept lowercase entries of the form <scheme>://*, such as moz-extension://* or chrome-extension://*, which admit every origin of that scheme. This lets a server admit MCP clients that run as a browser extension when the extension ID cannot be listed, as on Firefox, where it differs on every install. http://* and https://* are not honoured, and the defaults are unchanged.

... (truncated)

Commits

• fcef852 Version Packages (#2953)
• e8b7f05 docs: one opening note in the server and client package READMEs (#2955)
• 5a18673 feat(server-legacy): add expectedResource to requireBearerAuth (#2952)
• 3ab61c6 docs: update the README banners (#2940)
• 8aabbdc test(e2e): expect SdkHttpError after a second 401 from onUnauthorized (#2936)
• 33fecfb test(e2e): cover tools/call without arguments (#2933)
• 818f782 docs: state the principles in CLAUDE.md and shorten REVIEW.md (#2938)
• a202a36 Version Packages (#2896)
• 2d731fa fix(client): refresh again when an SSE retry failed for a reason other than 4...
• b6e5c55 test(e2e): cover prompts/get without arguments for prompts with a schema (#2928)
• Additional commits viewable in compare view

Updates zod from 4.6.5 to 4.6.7

Release notes

Sourced from zod's releases.

v4.6.7

Commits:

• b500a2ee95134f81d74da7911d7378dd2853d042 4.6.7

v4.6.6

Six malicious commits pushed to main on September 21 with a compromised git credential were reverted the same day in #6620 and have since been removed from the history of main. None were ever published to npm. The npm provenance for 4.6.6 names 284243fb, the pre-rewrite copy of 9c219833 with identical contents.

Commits:

• 0cd3af5e9f50ad11bbcd4407a46a21b8848ba574 docs: load the en locale directly in Zod Mini
• 9d5e60f162997b764b40d45aa02481888db50dea docs: import locales from zod/locales, not z.locales
• 34a626f307871ecbb0123947559328dc52ed5e3e docs: tighten the z.locales tree-shaking note
• 74304ce5b5796b5edb9a88ceb8e170b6ea3e82df release: stage npm versions instead of publishing them (#6622)
• b2ef983e0711ff6517d6020b021071e2e5653efa docs: add Code for Japan to bronze sponsors
• 8fb2faf0584828a6a027d8279db36f6f52784462 docs: crop the Code for Japan logo and list it first in bronze
• bacad518c41610d654658172d325874bf0ee6290 docs: square the Code for Japan logo to match the other bronze tiles
• c42596bd1c87e941d7241d10e012c5c196adcc10 release: hold the run on the release-approval environment until the staged versions are approved (#6638)
• a2ba4a67986a3e6b2b131be30084a2f460d9ea67 fix(types): declare record output and input as members, not base type arguments (#6645)
• a0ebf970f2d752e5f58527cd2942ff48be4f46bd fix(v4): check array, set and map size bounds before parsing elements (#6652)
• 529f78dd9431b07f49647fee3aa0819b3f8b66b7 4.6.6
• 9c219833c3a3764fa1f1ea9c5ecec8254a63c0b1 ci: stage at verbose so a failed OIDC token exchange says why

Commits

• b500a2e 4.6.7
• 9c21983 ci: stage at verbose so a failed OIDC token exchange says why
• 529f78d 4.6.6
• a0ebf97 fix(v4): check array, set and map size bounds before parsing elements (#6652)
• a2ba4a6 fix(types): declare record output and input as members, not base type argumen...
• c42596b release: hold the run on the release-approval environment until the staged ve...
• bacad51 docs: square the Code for Japan logo to match the other bronze tiles
• 8fb2faf docs: crop the Code for Japan logo and list it first in bronze
• b2ef983 docs: add Code for Japan to bronze sponsors
• 74304ce release: stage npm versions instead of publishing them (#6622)
• Additional commits viewable in compare view

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