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Model Context Protocol implementation for TypeScript
We found this by crawling public sources and nobody has attested to it. That is how most of the registry gets here, and it is not a mark against the artifact — it only means no authenticated act of publication is on record. An artifact can be the vendor's own and still appear here.
48 critical findings reported by cisco-skill-scanner, agent-audit-kit, 10 of them in the installed artifact. The composite score alone does not reflect this — read the per-scanner reports below.
Choose your runtime: the CLI writes the mcpServers config entry for that target.
nerlo install --target claude-code -- @modelcontextprotocol/sdk
Install respects the composite badge: Clean proceeds, Caution prompts for confirmation, and Flagged is refused. Write operations require an API token.
5 of 11 scanners examined this package. The rest do not apply to it — language, ecosystem and packaging decide which analyzers can say anything, and a scanner that cannot examine an artifact reports nothing rather than passing it.
v1.4.0
1 finding · 0.8s
v2.0.11
580 findings · 47.2s
v0.3.74
699 findings · 40.7s
v0.2.0
1 finding · 16.6s
v0.2.0
0 findings · 16.6s
vv0.3.2
No Go packages were found in this artifact. What each scanner covers
0 findings · 0.1s
v0.1.0
This scanner found nothing in this artifact that it assesses. What each scanner covers
0 findings · 2.5s
No report in this scan: govulncheck, osv-scanner, trivy, trivy_image.
8 scans on record. Every scan's full results are retained immutably for 24 months.
| Completed | Composite | Change | Scanners | Status |
|---|---|---|---|---|
| Sep 17, 2026 | Scan Halted | — | agentshield: completecisco-skill-scanner: completeagent-audit-kit: completenerlo-behavioral: completenerlo-install-instruction: completecapslock ·n/a: not applicablenerlo-multi-source ·n/a: not applicable | rejected |
| Aug 2, 2026 | Scan Halted | — | agentshield: completecisco-skill-scanner ·!: timeoutagent-audit-kit: completenerlo-behavioral: completenerlo-install-instruction: completenerlo-multi-source ·n/a: not applicable | rejected |
| Jul 30, 2026 | Scan Halted | — | cisco-skill-scanner: completeagent-audit-kit: completenerlo-behavioral: completenerlo-install-instruction: completenerlo-multi-source ·n/a: not applicable | rejected |
| Jul 21, 2026 | Scan Halted | — | agentshield: completecisco-skill-scanner: completeagent-audit-kit: completenerlo-behavioral: completenerlo-install-instruction: complete | rejected |
| Jul 20, 2026 | Scan Halted | — | agentshield: completecisco-skill-scanner: completeagent-audit-kit: complete | rejected |
| Jul 20, 2026 | Scan Halted | Clean → Flagged | agentshield: completecisco-skill-scanner: completeagent-audit-kit: complete | rejected |
| Jul 20, 2026 | Clean100 | — | agentshield ·n/a: not applicablecisco-skill-scanner ·n/a: not applicableagent-audit-kit: completetrivy: completeosv-scanner ·n/a: not applicable | completed |
| Jul 20, 2026 | Clean100 | — | agentshield ·n/a: not applicablecisco-skill-scanner ·n/a: not applicableagent-audit-kit: completetrivy: completeosv-scanner ·n/a: not applicable | completed |
Findings in files this artifact installs stand as reported; a model re-read the rest and said which ones it believes are false positives. This is a second opinion published beside the evidence, not a correction to it: the per-scanner reports above are unchanged, every dismissed finding is still listed there at its original severity, and the score and the Flagged badge are computed from those raw severities alone. Nothing below moved them.
Out of 1,281 findings across every scanner that examined this package. 35 of 48 findings rated critical by their scanner were among the dismissals.
Not reviewed is not the same as clean. Those 1 finding stand exactly as their scanners reported them, at full severity, as they would have without this review.
Two keys had to turn. The model had to name a reason from a fixed list of six, and a deterministic check of ours — over which files this artifact actually installs — had to independently agree. Anything it could not corroborate is in “not reviewed” above, at full severity.
710 Test or fixture file — The match is in a test or fixture. Our own check confirmed the file is not part of what gets installed.
Rules: AAK-SSRF-001, AAK-TAINT-001, COMMAND_INJECTION_EVAL and 23 more · Files: test/e2e/requirements.ts, test/conformance/src/authTestServer.ts, test/e2e/scenarios/hosting-entry-session.test.ts and 210 more · reported by agent-audit-kit, cisco-skill-scanner
302 Documentation or example — The match is in documentation or sample code, confirmed by our own check to be outside the installed artifact.
Rules: AAK-LEGAL-002, FILE_MAGIC_MISMATCH, AAK-OAUTH-006 and 8 more · Files: examples/streaming/package.json, examples/elicitation/package.json, examples/oauth-client-credentials/package.json and 166 more · reported by agent-audit-kit, cisco-skill-scanner
4 CI or editor configuration — The match is in build, CI or editor configuration, confirmed by our own check to be outside the installed artifact.
Rules: AAK-AGENT-TRUST-002, FILE_MAGIC_MISMATCH, AAK-GHA-IMMUTABLE-001 · Files: .github/workflows/claude.yml, /repo/examples/shared/vitest.config.js · reported by agent-audit-kit, cisco-skill-scanner
2 Agent instruction file — The match is in a file that instructs an AI coding agent — a CLAUDE.md or similar. It is documentation of intent, and our own check confirmed it is not part of what gets installed.
Rules: AAK-AGENT-002, agents-encoded-payload-6572 · Files: CLAUDE.md · reported by agent-audit-kit, agentshield
These findings are in files this artifact installs and are not placeholder values. No false-positive basis can be corroborated for such a finding, so this review never dismisses one; they were not sent to the model and stand at their scanner's severity.
40 DATA_EXFIL_JS_NETWORK
Files: /repo/packages/client/src/client/auth.ts, /repo/packages/client/src/shimsBrowser.ts, /repo/packages/client/src/shimsNode.ts and 11 more · reported by cisco-skill-scanner
27 AAK-MCP-DEPRECATED-002
Files: packages/server/src/server/legacyInputRequiredShim.ts, packages/server/src/server/server.ts, packages/codemod/src/migrations/v1-to-v2/mappings/specSchemaNames.ts and 24 more · reported by agent-audit-kit
26 FILE_MAGIC_MISMATCH
Files: /repo/packages/codemod/vitest.config.js, /repo/packages/core-internal/vitest.config.js, /repo/packages/core/vitest.config.js and 8 more · reported by cisco-skill-scanner
19 AAK-MCP-DEPRECATED-003
Files: packages/server/src/server/mcp.ts, packages/server/src/server/server.ts, packages/codemod/src/migrations/v1-to-v2/mappings/specSchemaNames.ts and 16 more · reported by agent-audit-kit
18 AAK-MCP-DEPRECATED-001
Files: packages/server/src/server/legacyInputRequiredShim.ts, packages/server/src/server/server.ts, packages/codemod/src/migrations/v1-to-v2/mappings/schemaToMethodMap.ts and 15 more
The model could have called any of these a false positive and did not.
3 AAK-MCP-STDIO-CMD-INJ-002
Files: test/e2e/scenarios/stdio.test.ts, test/e2e/fixtures/stdio-server.ts, examples/client-quickstart/src/index.ts · reported by agent-audit-kit
3 AAK-MCP-TOOLGATE-ASYMMETRY-001
Files: test/e2e/scenarios/protocol.test.ts, test/integration/test/server/mcp.test.ts, examples/tools/client.ts · reported by agent-audit-kit
1 The model did not answer for these findings.
Rules: AAK-OAUTH-004 · Files: packages/server-legacy/test/auth/handlers/authorize.test.ts · reported by agent-audit-kit
Critical command injection and SSRF vulnerabilities identified
The artifact contains critical command injection vulnerabilities, allowing shell execution via `child_process` in `packages/codemod/src/bin/batchTest.ts` and `eval` in `packages/client/src/client/client.ts` and `packages/client/src/client/responseCache.ts`. It also has a critical Server-Side Request Forgery (SSRF) vulnerability in `packages/server/src/server/createMcpHandler.ts`, which could lead to network egress. High severity findings indicate potential credential access issues in `packages/core-internal/src/shared/mcpParamHeaders.ts` and OAuth vulnerabilities in `packages/core/src/auth.ts` and `packages/server-legacy/src/auth/router.ts`.
Concern level assessed by the review: Critical. This is the review's scale, not the registry badge.
Reviewed by gemini-2.5-flash. The model sees the findings, not your code, and cannot change a score.
16 HIDDEN_DATA_FILE
Files: /repo/.prettierrc.json, /repo/.changeset/no-cancel-notification-for-initialize.md, /repo/.changeset/brave-donkeys-listen.md and 13 more · reported by cisco-skill-scanner
15 AAK-MCP-018
Files: packages/server/src/index.ts, packages/server/src/server/completable.examples.ts, packages/server/src/server/mcp.ts and 12 more · reported by agent-audit-kit
15 MANIFEST_MISSING_LICENSE
Files: /repo/SKILL.md, /repo/.changeset/SKILL.md, /repo/packages/server/SKILL.md and 12 more · reported by cisco-skill-scanner
15 SOCIAL_ENG_VAGUE_DESCRIPTION
Files: /repo/SKILL.md, /repo/.changeset/SKILL.md, /repo/packages/server/SKILL.md and 12 more · reported by cisco-skill-scanner
13 LOW_ANALYZABILITY
Files: /repo/packages/core-internal, /repo/packages/middleware/node, /repo/packages/codemod and 10 more · reported by cisco-skill-scanner
11 AAK-OAUTH-007
Files: packages/core/src/auth.ts, packages/server-legacy/src/auth/router.ts, packages/server-legacy/src/auth/index.ts and 8 more · reported by agent-audit-kit
5 AAK-MCP-SSRF-001
Files: scripts/fetch-spec-types.ts, scripts/fetch-schema-twins.ts, scripts/fetch-spec-examples.ts and 2 more · reported by agent-audit-kit
5 AAK-MCP-TOOLGATE-ASYMMETRY-001
Files: packages/codemod/src/migrations/v1-to-v2/mappings/schemaToMethodMap.ts, packages/client/src/client/client.ts, packages/core-internal/src/wire/rev2025-11-25/registry.ts and 2 more · reported by agent-audit-kit
4 AAK-OAUTH-005
Files: packages/server/src/server/middleware/bearerAuth.ts, packages/middleware/express/src/auth/bearerAuth.ts, packages/server-legacy/src/auth/middleware/bearerAuth.ts and 1 more · reported by agent-audit-kit
4 COMMAND_INJECTION_EVAL
Files: /repo/packages/client/src/client/client.ts, /repo/packages/client/src/client/responseCache.ts · reported by cisco-skill-scanner
4 COMMAND_INJECTION_JS_CHILD_PROCESS
Files: /repo/packages/codemod/src/bin/batchTest.ts · reported by cisco-skill-scanner
3 AAK-LEGAL-002
Files: common/tsconfig/package.json, common/vitest-config/package.json, common/eslint-config/package.json · reported by agent-audit-kit
3 AAK-OAUTH-008
Files: packages/client/src/client/streamableHttp.ts, packages/client/src/client/sse.ts, packages/client/src/client/dpop.ts · reported by agent-audit-kit
2 AAK-OAUTH-001
Files: packages/core/src/auth.ts, packages/server-legacy/src/auth/router.ts · reported by agent-audit-kit
2 AAK-SECRET-004
Files: packages/core-internal/src/shared/mcpParamHeaders.ts · reported by agent-audit-kit
2 EXCESSIVE_FILE_COUNT
Files: /repo/., /repo/packages/core-internal/. · reported by cisco-skill-scanner
1 AAK-MCP-ROUTING-DESYNC-001
Files: packages/server/src/server/createMcpHandler.ts · reported by agent-audit-kit
1 AAK-SSRF-001
Files: packages/server/src/server/createMcpHandler.ts · reported by agent-audit-kit
1 AAK-SSRF-005
Files: packages/server/src/server/createMcpHandler.ts · reported by agent-audit-kit
1 AAK-STDIO-001
Files: packages/client/src/client/stdio.ts · reported by agent-audit-kit
1 AAK-TASKS-003
Files: packages/codemod/src/migrations/v1-to-v2/transforms/mcpServerApi.ts · reported by agent-audit-kit
1 MANIFEST_INVALID_NAME
Files: /repo/.changeset/SKILL.md · reported by cisco-skill-scanner
1 opt.nerlo-rules.nerlo-hardcoded-external-egress
Files: /repo/scripts/fetch-spec-examples.ts · reported by nerlo-behavioral
Showing 25 of 28; the rest are in the per-scanner reports above.