Observability & Evals
6 observability & evals tools you can use instead of NAIF Gravity MCP Diagnostics, 2 of them open source. Summaries come from each vendor's own site. Links checked Nov 4, 2026.
Open-source Python CLI that checks an MCP Streamable HTTP server's discovery handshake (initialize, session, tools/list) and reports pass or fail, with JSON output for agents and CI. It never calls tools. Run from a clone with python3 tools/mcp_health_check.py <url>.
At a glance
| Tool | What it does | Open source | Head to head |
|---|---|---|---|
| AgentOps | Tracing and debugging for AI agents. | No | NAIF Gravity MCP Diagnostics vs AgentOps |
| Braintrust | Observability and evals platform for production agents. | No | NAIF Gravity MCP Diagnostics vs Braintrust |
| Helicone | AI gateway with routing and LLM observability. | Yes | NAIF Gravity MCP Diagnostics vs Helicone |
| Langfuse | Open-source tracing, evals, and observability for agents. | Yes | NAIF Gravity MCP Diagnostics vs Langfuse |
| LangSmith | LangChain's tracing and monitoring platform for agents and LLM apps. | No | NAIF Gravity MCP Diagnostics vs LangSmith |
| Pragor | Operations board for teams of AI agents: shared tasks and messages, human approvals for risky steps, an attributable audit trail, app health reporting and an MCP server, across any framework or model. | No | NAIF Gravity MCP Diagnostics vs Pragor |
Observability & Evals
Tracing and debugging for AI agents.
Observability and evals platform for production agents.
AI gateway with routing and LLM observability.
Open-source tracing, evals, and observability for agents.
LangChain's tracing and monitoring platform for agents and LLM apps.
Operations board for teams of AI agents: shared tasks and messages, human approvals for risky steps, an attributable audit trail, app health reporting and an MCP server, across any framework or model.
FAQ
Agent Stack Directory lists 6 other observability & evals tools: AgentOps, Braintrust, Helicone, Langfuse, LangSmith, Pragor.
Yes. Among the alternatives we list, these are marked open source: Helicone, Langfuse.
Open-source Python CLI that checks an MCP Streamable HTTP server's discovery handshake (initialize, session, tools/list) and reports pass or fail, with JSON output for agents and CI. It never calls tools. Run from a clone with python3 tools/mcp_health_check.py <url>. (Summary based on github.com, link checked 2026-11-04.)