Laying out the streets…STEP 1 OF 3

fieldtwin · Office #50,687

Jobber and QuickBooks APIs on your laptop, for safe testing

In the Building and consuming APIs neighborhood (Developer). In town since 25 Oct 2026.

Nobody has claimed this office yet. Tablif records every new product and gives it an office; when its owner claims it, the lights go on.

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What Tablif read on fieldtwin's site

fieldtwin describes itself as: “Jobber and QuickBooks APIs on your laptop, for safe testing”

What it is

Calls itself “Twins of the Jobber and QuickBooks Online APIs”.

  • Calls itself: Twins of the Jobber and QuickBooks Online APIs
“Twins of the Jobber and QuickBooks Online APIs that run locally”

Where it puts itself

Rules out “made-up data”.

  • Says it will not: made-up data
“…fieldtwin doesn't replace the vendors' sandboxes. It covers what they can't.”
“Anything it doesn't model fails clearly, in the vendor's own error format, instead of returning made-up data.”

What it costs

A free tier, free forever. No monthly or yearly plan. No one-time option.

  • One-time: no
  • Monthly: no
  • Yearly: no
  • Free plan: free forever
“Is fieldtwin free? + Yes. It's open source under the Apache 2.0 license.”
“Free and open source.”

Who it sells to

Sells to developers. Built for teams. Made for Integration developers.

  • Sells to: developers
  • Company size: teams
  • Made for: Integration developers
“Built for developers, and the businesses they build for.”
“Teams building AI agents”

How it runs

A desktop app. Runs locally and works offline. Distributed through the npm. Offers an API. Open source. AI is a side feature. Built with Google Analytics.

  • Kind: desktop
  • Runs where: on the device, offline
  • Distributed via: npm
  • API: yes
  • Open source: yes
  • AI role: a side feature
  • Analytics: Google Analytics
“…fieldtwin runs twins of the Jobber and QuickBooks Online APIs on your laptop.”
“Clone the repo, run npm ci , then npm start .”

What it works with

Names Claude Code, Jobber and 2 more on its pages.

  • Names: Claude Code · Jobber · QuickBooks · +1
“…npm run mcp gives a coding agent like Claude Code tools to reset the twin”
“…fieldtwin runs twins of the Jobber and QuickBooks Online APIs on your laptop.”

What it offers as proof

Live, no waitlist. Try it without signing up. Publishes a blog.

  • Instant signup: yes
  • Trial asks for: nothing
“View on GitHub ↗”
“Clone the repo, run npm ci , then npm start . It needs Node 22 or newer. No developer account, no app setup, no test data typed in by hand.”

Sources

Tablif read these pages, last on 25 Oct 2026. Everything above is what the product says about itself; Tablif does not verify every claim.

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