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Lookspan
Local-first observability for AI agents — one command
Lookspan is local-first observability for AI agents. npx lookspan runs a dashboard on your machine — traces with a timeline/waterfall, a readable transcript per LLM call, cost & latency, plus replay, LLM-as-judge and datasets. MCP-native, OpenAI/Anthropic drop-ins, OpenTelemetry. Your prompts never leave your box. MIT.
Hi PH 👋 I'm Jonathan, I built Lookspan. Every LLM observability tool I tried was SaaS — account, cloud, per-event pricing — before I could see a single trace. Lookspan is the opposite: npx lookspan → local dashboard, data stays on your machine, $0 infra. Beyond tracing it closes the loop: replay a prompt against another model and diff cost/latency/output, score with an LLM-judge, run datasets in batch. MCP-native, one-line OpenAI/Anthropic drop-ins, OTel receiver. MIT & early — I'd love feedback on what's missing. Thanks for checking it out!
About Lookspan on Product Hunt
“Local-first observability for AI agents — one command”
Lookspan was submitted on Product Hunt and earned 4 upvotes and 1 comments, placing #116 on the daily leaderboard. Lookspan is local-first observability for AI agents. npx lookspan runs a dashboard on your machine — traces with a timeline/waterfall, a readable transcript per LLM call, cost & latency, plus replay, LLM-as-judge and datasets. MCP-native, OpenAI/Anthropic drop-ins, OpenTelemetry. Your prompts never leave your box. MIT.
On the analytics side, Lookspan competes within Open Source, Developer Tools, Artificial Intelligence and GitHub — topics that collectively have 1.1M followers on Product Hunt. The dashboard above tracks how Lookspan performed against the three products that launched closest to it on the same day.
Who hunted Lookspan?
Lookspan was hunted by Jonathan Martín. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of Lookspan including community comment highlights and product details, visit the product overview.
Jonathan Martín