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Side-by-side MCP evidence comparison
Evidence fieldLangSmith MCPMCP100 SelectedContext7 MCPMCP100 Selected
Task fit
Best for
  • Teams already using LangSmith Cloud
  • Debugging and evaluation workflows that need direct access to workspace observability data
  • Current library and API documentation inside coding agents
  • Read-only technical lookup with a small two-tool surface
  • Users who want remote or local npx connection options
Not ideal for
  • Self-hosted LangSmith deployments without the standalone server
  • Codex CLI users until the documented OAuth compatibility issue is resolved
  • Private internal documentation not indexed by Context7
  • Guaranteed authoritative answers without checking the cited upstream docs
  • Offline-only development
Avoid when
  • Your MCP client cannot complete OAuth 2.1 with dynamic client registration
  • The workspace data should not be exposed to an AI client
  • Your policy prohibits sending formulated documentation queries to a hosted service
  • You require complete or guaranteed-correct community-contributed documentation
  • You cannot keep an API key out of shared configuration
Provenance
Provenance details

First-party MCP

LangChain / LangSmith · Publisher source ↗

First-party MCP

Upstash · Publisher source ↗

Maintenance
Maintenance details

Repo: Not documented

Package: Not documented

Repo: Aug 14, 2026

Package: Aug 11, 2026

Popularity evidence
GitHub starsNot documented

60,740

GitHub stars · checked 2026-08-14T18:46:26.000Z

Package downloads / 30 daysNo reliable download data

3,865,239

package downloads / 30 days · checked 2026-09-08

External adoption evidenceNot documented
  • npm: package downloads: 3,916,841Exact attributable signal.npm: package downloads · Rolling 30 days · checked 2026-08-14T18:46:26.000ZEvidence source ↗
Client coverage
Client coverage detailsNot documented
Claude Code✓ Streamable HTTP
Claude Desktop✓ Streamable HTTP
Codex✓ Streamable HTTP
VS Code✓ Streamable HTTP
Cursor✓ Streamable HTTP
OpenCode✓ Streamable HTTP
Client coverage noteLocal stdio runs on your computer. Streamable HTTP connects to a remotely hosted MCP server.
Access and data
AuthenticationOAuth 2.1 with dynamic client registration. The access token is scoped to the authenticated LangSmith user and workspace and is refreshed by supported clients.Remote MCP accepts CONTEXT7_API_KEY as an HTTP header. The local package accepts --api-key. The CLI can use OAuth to generate an API key; unauthenticated documentation commands may have lower limits.
CostAvailable with LangSmith Cloud; LangSmith plan/usage charges apply according to the user's account.A free API key and free usage are documented, with higher-rate or team/enterprise offerings potentially requiring a paid plan. Applicable limits should be checked in the current Context7 dashboard.
PermissionsCalls inherit the user's LangSmith workspace permissions; the MCP server does not grant access beyond what that account can access.The MCP surface resolves library identifiers and queries documentation. It does not require repository or filesystem write access for the documented hosted mode.
Data handlingThe service can expose conversation history, traces/runs, datasets, examples, experiments, prompts, and billing usage from LangSmith Cloud.Context7 states that formulated queries are sent to its API while full prompts, source code, and conversation history are not transmitted; its tool descriptions instruct clients to remove secrets, personal data, and proprietary code.
Limitations
Tradeoffs
  • Hosted setup is simple, but client compatibility depends on correct MCP OAuth behavior
  • The tool surface includes both read and write operations such as prompt/dataset/example changes
  • An API key is recommended for higher limits, adding account and secret management.
  • Context7 says it sends formulated queries rather than full prompts or source code, but queries still leave the client.
  • Community-contributed projects can be incomplete or inaccurate and should be checked against primary documentation.
Risk contextMedium. Observability and evaluation data can be sensitive, and some tools can create or update workspace resources. There is also a documented Codex OAuth incompatibility at review time.Primary risks are query disclosure, stale or inaccurate indexed documentation, and accidental API-key exposure. Keep queries free of proprietary details and verify consequential advice against first-party library documentation.
Evidence date
Editorial review2026-09-112026-07-24
Candidate evidence2026-09-11T00:00:00.000Z2026-08-14T18:46:26.000Z

Popularity, maintenance, fit, permissions, and client support are independent evidence fields.

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