This product was not featured by Product Hunt yet. It will not be visible on their landing page and won't be ranked (cannot win product of the day regardless of upvotes).
Vessel is a local-first observability proxy for LLM traffic: capture, search, replay, and compare every prompt across Ollama, OpenAI, and Anthropic and all other backends. One binary, no account, nothing leaves your machine. It also hosts a small MCP server so your coding agents can query traces in real-time - very useful for troubleshooting
I built it because I was running multiple local agents and wanted to track what they were actually doing. Now each one is tagged, measured, and comparable.
It's not a replacement for the likes of Langfuse/Langsmith/Logfire and other observability platforms.
Vessel is more like a debugging proxy. Fiddler/Proxyman/DevTools-network-tab territory, but for LLM traffic. No SDK, no code changes: you point a base_url at it, so it also works with clients you can't modify (Open WebUI, IDE plugins, whatever). Local web UI to inspect what actually went over the wire, plus replaying a captured request against a different model to compare.
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About Vessel on Product Hunt
“See what your agents are actually doing”
Vessel was submitted on Product Hunt and earned 2 upvotes and 1 comments, placing #154 on the daily leaderboard. Vessel is a local-first observability proxy for LLM traffic: capture, search, replay, and compare every prompt across Ollama, OpenAI, and Anthropic and all other backends. One binary, no account, nothing leaves your machine. It also hosts a small MCP server so your coding agents can query traces in real-time - very useful for troubleshooting
Vessel was featured in Open Source (68.9k followers), Developer Tools (520.4k followers), Artificial Intelligence (479.9k followers) and GitHub (41.4k followers) on Product Hunt. Together, these topics include over 257.2k products, making this a competitive space to launch in.
Who hunted Vessel?
Vessel was hunted by Spencer Clark. 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.
Want to see how Vessel stacked up against nearby launches in real time? Check out the live launch dashboard for upvote speed charts, proximity comparisons, and more analytics.
Spencer Clark