Vercel Labs
fx
Vercel Labs' tiny, embeddable, native coding agent written in Zig: a 6.1 MiB binary with a WebAssembly SDK (libfx) and ACP support, first released ~Aug 17, 2026 under Apache-2.0. Model-agnostic via the Vercel AI Gateway (new sessions default to Kimi K3), with Codex and Grok subscription sign-in.
n/a
Attributed output
No signal we can detect yet
n/aAttributed outputNo signal we can detect yetCommits and PRs on public GitHub provably produced by this agent. Exact if it is visible through its own bot or workflow, an estimate if measured through attribution it declares (these can swing 30 to 40 percent between measurement runs at multi-million scale), and a floor either way.#37
Index rank
of 44 tracked agents
#37Index rankof 44 tracked agentsn/a
Business signal
No sourced business metric
n/aBusiness signalNo sourced business metricn/a
Entry price
No published pricing
n/aEntry priceNo published pricingNot published
npm demand/wk
Public npm counter
Not publishednpm demand/wkPublic npm counterWeekly package downloads as an install-demand floor; adjusted when the vendor's main install channel is no longer npm.Market
Developer output
No signal we can detect yet
fx works through the developer's own identity and leaves nothing public we can currently attribute to it on its output, so its public footprint is invisible \u2014 not absent, and not a sign of low usage. Agents in this group are ordered by their sourced business and traction signals instead.
- Index rank
- #37 of 44
- Demand share
- No public npm package
- Business signal
- No sourced business metric
- GitHub share
- 0.2% of tracked stars
- npm channel
- No public npm package
All sourced signals (1)ExpandHide
| Signal | Value | Type | Confidence |
|---|---|---|---|
| Early traction | ~2.5K stars and 266 forks in the first ~9 days | Public metric | High |
Product
Providers
Model families
Capabilities
Tradeoffs
- Explicitly experimental (v0.0.x)
- Interesting as a signal of where Vercel is going more than as a daily driver today