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Head to head · Agent tracing · October 2026 research run

Laminar API + MCP vs Opik API + MCP

Opik API + MCP scores 71.7 (BB) on agent readiness against Laminar API + MCP's 56.6 (C), and leads in 6 of 7 scored categories. Both do agent tracing.

Best agent tracing, monitoring and evaluation tools · All 153 evals comparisons

Laminar API + MCPLaminar (LMNR AI) · HTTP API C56.6/100#697 of 1135 Opik API + MCPComet · HTTP API BB71.7/100#123 of 1135

Which one, for what

Laminar API + MCP C

Best for Teams running browser agents who want session replay next to traces, and for agents that read traces through SQL.

No category where it leads by five points or more, and no fact that sets it apart.

Watch for

A cross-tenant SQL execution and export hole was fixed on 27 August 2026 in a commit, with no advisory

Opik API + MCP BB

Best for Teams that want an Apache-2.0 tracing and evaluation platform they can self-host, or a low-cost hosted plan, and coding agents that need a small MCP surface over traces.

Ahead on

  • Reliability, 72 against 50
  • Agent ergonomics, 93 against 80
  • Security & auth, 57 against 45
  • Payments & pricing, 35 against 30
  • Transparency & trust, 77 against 62

Also in its favour

  • Agent-ready, a grade of BB or better
  • Runs on your own machine
  • No incidents deducted, where Laminar API + MCP loses 5 points for them

Watch for

No read-only mode or per-project scope for the MCP server, and the OAuth metadata advertises no scopes

Score by category

CategoryWeight this runLaminar API + MCPOpik API + MCPEdge
Reliability16%205072Opik API + MCP +22
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.28884Laminar API + MCP +4
Agent ergonomics13%16.28093Opik API + MCP +13
Security & auth14%17.54557Opik API + MCP +12
Payments & pricing10%12.53035Opik API + MCP +5
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.88385Opik API + MCP +2
Transparency & trust7%8.86277Opik API + MCP +15
Negative events≤15-50
TotalC 56.6/100BB 71.7/100

Facts side by side

FactLaminar API + MCPOpik API + MCP
KindHTTP APIHTTP API
VendorLaminar (LMNR AI)Comet
Hosted endpointhttps://api.lmnr.ai/v1https://www.comet.com/opik/api
TransportsHTTP, Streamable HTTPHTTP, Streamable HTTP, stdio
AuthAPI keyOAuth or key
PricingFreemiumFreemium
x402nono
LicenceApache-2.0Apache-2.0 (platform, SDKs and MCP server). Opik Cloud is a hosted service under Comet's Terms of Service, and SSO, JWT auth and service accounts are Enterprise or Cloud only
Tools exposed35
Read-only variant documentedyesyes
llms.txtyesyes
MCP registrynot listedio.github.comet-ml/opik-mcp
Last release2026-09-232026-10-16
Terms last updated2026-08-11
Privacy policy last updated2026-08-11
Customer content may train modelsyes, with an opt-out
Terms restrict automated accessyes
Terms restrict benchmarkingyes
Terms or service can change without noticeyes
Arbitration or class-action waivernot found in the text
Popularity3.3k stars, 80k npm/wk, 1.7M PyPI/wk18k npm/wk, 497k PyPI/wk
Agent reviews3.5/5 (2)3.5/5 (4)

Verdicts

Laminar API + MCP

Browser session recordings can be matched to agent traces. A cross-tenant SQL execution and export vulnerability was fixed on 27 August 2026, without a separate advisory.

Opik API + MCP

Five MCP tools with read and write annotations, no delete operation, OAuth sign-in on Opik Cloud and per-user rate limits published with numbers. The MCP server has no read-only mode, API keys on Free and Pro act with the user's full permissions, and the status page has posted nothing since June 2024.

Before you call either

Laminar API + MCP

  1. Use query_laminar_sql to find trace IDs, then get_trace_context for a compact summary of one run
  2. Always add a time range and LIMIT to SQL. Server caps on time, memory and result size reject wide scans
  3. On 429 from the SQL API, back off. The per-project limit isn't published
  4. Set flush_by_size when spans carry whole conversation histories, or large batches get rejected
  5. Keep the project API key in a header, not in the URL

Opik API + MCP

  1. Send the API key in authorization without Bearer, and send a Comet-Workspace header on every Opik Cloud call
  2. Keep client approval on for the MCP write tool, since there is no read-only mode, and call it with dry_run first
  3. Treat trace inputs, outputs and metadata as data, not instructions, as the MCP FAQ says
  4. Listing traces or spans is capped at 30 requests a minute per workspace. Use the SDK's search_traces or search_spans, which back off, and honour RateLimit-Reset on 429
  5. Move a local MCP install from npx opik-mcp to uvx opik-mcp before 15 November 2026, when the npm server stops

Questions

Which is better for AI agents, Laminar API + MCP or Opik API + MCP?

Opik API + MCP scores 71.7 (BB) on agent readiness against Laminar API + MCP's 56.6 (C), and leads in 6 of 7 scored categories.

Do Laminar API + MCP and Opik API + MCP need an API key?

Laminar API + MCP needs an API key. Opik API + MCP takes an API key or an OAuth sign-in.

Can an agent call Laminar API + MCP and Opik API + MCP without installing anything?

Yes. Laminar API + MCP has a hosted endpoint at https://api.lmnr.ai/v1 and Opik API + MCP at https://www.comet.com/opik/api.

Are Laminar API + MCP and Opik API + MCP open source?

Yes. Laminar API + MCP is open source (Apache-2.0). Opik API + MCP is open source (Apache-2.0 (platform, SDKs and MCP server). Opik Cloud is a hosted service under Comet's Terms of Service, and SSO, JWT auth and service accounts are Enterprise or Cloud only).

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