Developer Frameworks & Infrastructure
Span-01
Open telemetry and LLM observability platform for AI agents
Freemium - from Free tier / Usage pricingRuns in the cloud
Pricing
Freemium - from Free tier / Usage pricing
Free tier / Usage pricing
Platforms
Web
Hosted app
Category
Developer Frameworks & Infrastructure
133 tools
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Last updated
Sep 30
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Agent tool-call trace monitoring
Debug multi-step agent execution chains by inspecting individual tool inputs, outputs, and latencies.
Pricing checked Sep 2026
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About Span-01
Span-01, created by Respan, is a developer observability and telemetry platform built specifically for agentic AI applications. By capturing OpenTelemetry spans across multi-step LLM chains, tool invocations, and vector queries, Span-01 provides deep visibility into latency bottlenecks, token costs, and prompt failures.
It enables engineering teams to run real-time evaluations, track user feedback, and optimize agent cost efficiency in production.
- Native OpenTelemetry compatibility for zero-friction SDK integration
- Granular visualization of nested agent execution loops and tool calls
- Generous developer free tier for early-stage startup telemetry
- High-throughput enterprise pipelines require monitoring log storage retention limits
- Requires adding SDK instrumentation wrappers to agent server endpoints
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