Runtime evidence / smoke tested

@modelcontextprotocol/sdk1.32.1

Observed 2026-10-09 13:55 UTC · Linux amd64 / glibc

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Version summary · Observation 0 · Report history · Maintainer tools (coming soon)

Inconclusive

Coverage is limited. Inspect the groups and omissions below.

This is loading evidence. It does not establish functional correctness or package safety.

Runtime matrix

4 pinned runtimes · production_ab51508deb208994caf81cb80f14b800

Loading outcomes by runtime and consumer mode
Runtime	Root import	Root require	Subpath imports	Subpath requires
Node.js24.21.0	Failed	Failed	Inconclusive6 passed · 1 needs an optional peer	Inconclusive6 passed · 1 needs an optional peer
Node.js26.10.0	Failed	Failed	Inconclusive6 passed · 1 needs an optional peer	Inconclusive6 passed · 1 needs an optional peer
Bun1.4.2	Failed	Failed	Mixed results6 passed · 1 failed	Mixed results6 passed · 1 failed
Deno2.9.7	Failed	Failed	Inconclusive6 passed · 1 needs an optional peer	Inconclusive6 passed · 1 needs an optional peer

Node.js 24.21.0

Root importFailed

Root requireFailed

Subpath importsInconclusive6 passed · 1 needs an optional peer

Subpath requiresInconclusive6 passed · 1 needs an optional peer

Node.js 26.10.0

Root importFailed

Root requireFailed

Subpath importsInconclusive6 passed · 1 needs an optional peer

Subpath requiresInconclusive6 passed · 1 needs an optional peer

Bun 1.4.2

Root importFailed

Root requireFailed

Subpath importsMixed results6 passed · 1 failed

Subpath requiresMixed results6 passed · 1 failed

Deno 2.9.7

Root importFailed

Root requireFailed

Subpath importsInconclusive6 passed · 1 needs an optional peer

Subpath requiresInconclusive6 passed · 1 needs an optional peer

Import uses ESM; require uses CommonJS. Root modes use fresh sandboxes. Subpath batches share module caches and globals. Select a result to inspect its evidence.

Does @modelcontextprotocol/sdk work in Node.js, Bun and Deno?

Coverage is limited: some exports or checks were omitted, incomplete or unavailable. A passing runtime row does not remove those gaps. The runtimes used the same installed dependency snapshot. Test environment: Linux amd64 / glibc, with install scripts and execution networking disabled. Successful import or require does not prove that package functions, native features or your application work.

Does @modelcontextprotocol/sdk work with Node.js?

@modelcontextprotocol/sdk@1.32.1 has inconclusive loading evidence in Node.js 24.21.0. 12 passed · 2 failed · 2 need optional peers.

@modelcontextprotocol/sdk@1.32.1 has inconclusive loading evidence in Node.js 26.10.0. 12 passed · 2 failed · 2 need optional peers.

Does @modelcontextprotocol/sdk work with Bun?

@modelcontextprotocol/sdk@1.32.1 had mixed loading results in Bun 1.4.2. 12 passed · 4 failed.

Does @modelcontextprotocol/sdk work with Deno?

@modelcontextprotocol/sdk@1.32.1 has inconclusive loading evidence in Deno 2.9.7. 12 passed · 2 failed · 2 need optional peers.

Compare npm package compatibility across Node.js, Bun and Deno · Browse observed runtime loading failures

Shared preparation

Passed

95 installed packages · 0 optional dependencies omitted · lifecycle scripts disabled

The omitted count covers locked optional dependencies. Optional peers are separate and are not automatically installed.

Static manifest, native and script observations

Static indicators are context; their presence alone does not establish a prerequisite or failure.

{
  "native": {
    "count": 0,
    "paths": [],
    "buildIndicators": [],
    "prerequisiteProven": false
  },
  "declared": {
    "type": "module",
    "engines": {
      "node": ">=18"
    },
    "exports": {
      ".": {
        "types": "./dist/esm/index.d.ts",
        "import": "./dist/esm/index.js",
        "require": "./dist/cjs/index.js"
      },
      "./*": {
        "types": "./dist/esm/*.d.ts",
        "import": "./dist/esm/*",
        "require": "./dist/cjs/*"
      },
      "./client": {
        "types": "./dist/esm/client/index.d.ts",
        "import": "./dist/esm/client/index.js",
        "require": "./dist/cjs/client/index.js"
      },
      "./server": {
        "types": "./dist/esm/server/index.d.ts",
        "import": "./dist/esm/server/index.js",
        "require": "./dist/cjs/server/index.js"
      },
      "./validation": {
        "types": "./dist/esm/validation/index.d.ts",
        "import": "./dist/esm/validation/index.js",
        "require": "./dist/cjs/validation/index.js"
      },
      "./experimental": {
        "types": "./dist/esm/experimental/index.d.ts",
        "import": "./dist/esm/experimental/index.js",
        "require": "./dist/cjs/experimental/index.js"
      },
      "./validation/ajv": {
        "types": "./dist/esm/validation/ajv-provider.d.ts",
        "import": "./dist/esm/validation/ajv-provider.js",
        "require": "./dist/cjs/validation/ajv-provider.js"
      },
      "./experimental/tasks": {
        "types": "./dist/esm/experimental/tasks/index.d.ts",
        "import": "./dist/esm/experimental/tasks/index.js",
        "require": "./dist/cjs/experimental/tasks/index.js"
      },
      "./validation/cfworker": {
        "types": "./dist/esm/validation/cfworker-provider.d.ts",
        "import": "./dist/esm/validation/cfworker-provider.js",
        "require": "./dist/cjs/validation/cfworker-provider.js"
      }
    },
    "scripts": {
      "lint": "eslint src/ && prettier --check .",
      "test": "vitest run --exclude \"test/e2e/**\"",
      "build": "npm run build:esm && npm run build:cjs",
      "check": "npm run typecheck && npm run lint",
      "start": "npm run server",
      "client": "tsx scripts/cli.ts client",
      "server": "tsx watch --clear-screen=false scripts/cli.ts server",
      "prepack": "npm run build:esm && npm run build:cjs",
      "lint:fix": "eslint src/ --fix && prettier --write .",
      "test:e2e": "vitest run test/e2e",
      "build:cjs": "mkdir -p dist/cjs && echo '{\"type\": \"commonjs\"}' > dist/cjs/package.json && tsc -p tsconfig.cjs.json",
      "build:esm": "mkdir -p dist/esm && echo '{\"type\": \"module\"}' > dist/esm/package.json && tsc -p tsconfig.prod.json",
      "typecheck": "tsgo --noEmit",
      "test:watch": "vitest",
      "build:cjs:w": "npm run build:cjs -- -w",
      "build:esm:w": "npm run build:esm -- -w",
      "fetch:spec-types": "tsx scripts/fetch-spec-types.ts",
      "test:conformance:client": "npx @modelcontextprotocol/conformance client --command 'npx tsx test/conformance/src/everythingClient.ts' --expected-failures test/conformance/conformance-baseline.yml",
      "test:conformance:server": "test/conformance/scripts/run-server-conformance.sh --expected-failures test/conformance/conformance-baseline.yml",
      "examples:simple-server:w": "tsx --watch src/examples/server/simpleStreamableHttp.ts --oauth",
      "test:conformance:client:all": "npx @modelcontextprotocol/conformance client --command 'npx tsx test/conformance/src/everythingClient.ts' --suite all --expected-failures test/conformance/conformance-baseline.yml",
      "test:conformance:server:all": "test/conformance/scripts/run-server-conformance.sh --suite all --expected-failures test/conformance/conformance-baseline.yml",
      "test:conformance:server:run": "npx tsx test/conformance/src/everythingServer.ts"
    },
    "dependencies": {
      "ajv": "^8.17.1",
      "zod": "^3.25 || ^4.0",
      "cors": "^2.8.5",
      "hono": "^4.11.4",
      "jose": "^6.1.3",
      "express": "^5.2.1",
      "raw-body": "^3.0.0",
      "ajv-formats": "^3.0.1",
      "cross-spawn": "^7.0.5",
      "eventsource": "^3.0.2",
      "content-type": "^1.0.5",
      "pkce-challenge": "^5.0.0",
      "@hono/node-server": "^1.19.9 || ^2.0.5",
      "json-schema-typed": "^8.0.2",
      "eventsource-parser": "^3.0.0",
      "express-rate-limit": "^8.2.1",
      "zod-to-json-schema": "^3.25.1"
    },
    "devDependencies": {
      "ws": "^8.18.0",
      "tsx": "^4.16.5",
      "eslint": "^9.8.0",
      "vitest": "^4.0.8",
      "prettier": "3.6.2",
      "@types/ws": "^8.5.12",
      "supertest": "^7.0.0",
      "@eslint/js": "^9.39.1",
      "typescript": "^5.5.4",
      "@types/cors": "^2.8.17",
      "@types/node": "^22.12.0",
      "@types/express": "^5.0.0",
      "eslint-plugin-n": "^17.23.1",
      "@types/supertest": "^6.0.2",
      "typescript-eslint": "^8.48.1",
      "@types/cross-spawn": "^6.0.6",
      "@types/eventsource": "^1.1.15",
      "@types/content-type": "^1.1.8",
      "@cfworker/json-schema": "^4.1.1",
      "eslint-config-prettier": "^10.1.8",
      "@typescript/native-preview": "^7.0.0-dev.20251103.1",
      "@types/express-serve-static-core": "^5.1.0",
      "@modelcontextprotocol/conformance": "^0.1.14"
    },
    "peerDependencies": {
      "zod": "^3.25 || ^4.0",
      "@cfworker/json-schema": "^4.1.1"
    },
    "peerDependenciesMeta": {
      "zod": {
        "optional": false
      },
      "@cfworker/json-schema": {
        "optional": true
      }
    }
  },
  "platform": {
    "os": true,
    "cpu": true,
    "libc": true
  },
  "evidenceLevel": "static_only",
  "lifecycleScripts": []
}

Coverage and evidence

Node.js 24.21.0 · Root · ESM importFailed

0 passed · 1 failed · 1 observed of 1 planned

package_resolution_failed · module resolution
Cannot find module '/workspace/node_modules/@modelcontextprotocol/sdk/dist/esm/index.js' imported from /workspace/.compatlab/probe.mjs

@modelcontextprotocol/sdk1.32.1

Runtime matrix

Node.js 24.21.0

Node.js 26.10.0

Bun 1.4.2

Deno 2.9.7

Does @modelcontextprotocol/sdk work in Node.js, Bun and Deno?

Does @modelcontextprotocol/sdk work with Node.js?

Does @modelcontextprotocol/sdk work with Bun?

Does @modelcontextprotocol/sdk work with Deno?

Shared preparation

Coverage and evidence

Reproduce these inputs

node_24_21_0

node_26_10_0

bun_1_4_2

deno_2_9_7

Evidence limitations