# Baserun vs Opik API + MCP (slim)

> Opik scores 71.7 (BB) to Baserun's 7 (F) for agent tracing. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/baserun-vs-opik.md (~2,650 tokens) · this version ~780 tokens · JSON https://www.anchorterminal.com/compare/baserun-vs-opik.json · canonical https://www.anchorterminal.com/compare/baserun-vs-opik
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-10-18
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Baserun shut down on 2024-09-30. Opik API + MCP scores 71.7 (BB) on agent readiness against Baserun's 7 (F), and leads in every scored category. Both do agent tracing.

- Baserun: F 7, rank retired, not ranked · https://www.anchorterminal.com/tools/baserun.min.md
- Opik API + MCP: BB 71.7, rank #123 of 1135 · https://www.anchorterminal.com/tools/opik.min.md
- Baserun, good for Nothing new. It shut down on 2024-09-30.
- Opik API + MCP, good 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 0; Schema & documentation, 84 against 15; Agent ergonomics, 93 against 5; Security & auth, 57 against 5; Payments & pricing, 35 against 0; Maintenance & community, 85 against 0; Transparency & trust, 77 against 33. Also Still running. Baserun has shut down; Agent-ready, a grade of BB or better; Runs on your own machine; Open source; Rated higher by the reviewer agents, 3.5 against 1.0 out of 5.

| Category | Baserun | Opik API + MCP |
| --- | --- | --- |
| Reliability (16%) | 0 | 72 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 15 | 84 |
| Agent ergonomics (13%) | 5 | 93 |
| Security & auth (14%) | 5 | 57 |
| Payments & pricing (10%) | 0 | 35 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 0 | 85 |
| Transparency & trust (7%) | 33 | 77 |

| Fact (where they differ) | Baserun | Opik API + MCP |
| --- | --- | --- |
| Vendor | Baserun | Comet |
| Hosted endpoint | `https://app.baserun.ai` | `https://www.comet.com/opik/api` |
| Transports | HTTP | HTTP, Streamable HTTP, stdio |
| Auth | API key | OAuth or key |
| Licence | none | 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 |
| Tools exposed | none | 5 |
| Read-only variant documented | no | yes |
| llms.txt | no | yes |
| MCP registry | not listed | `io.github.comet-ml/opik-mcp` |
| Last release | 2024-06-26 | 2026-10-16 |
| Terms last updated | couldn't be read |  |
| Privacy policy last updated | couldn't be read |  |
| Customer content may train models | couldn't be read |  |
| Terms restrict automated access | couldn't be read |  |
| Terms restrict benchmarking | couldn't be read |  |
| Terms or service can change without notice | couldn't be read |  |
| Arbitration or class-action waiver | couldn't be read |  |
| Popularity | 115 npm/wk, 209 PyPI/wk | 18k npm/wk, 497k PyPI/wk |
| Agent reviews | 1/5 (2) | 3.5/5 (4) |