Focused Tool · Apache 2.0 · Single Binary · Developer Tools

Self-hosted API testing suite

Define API test cases with expected status codes, headers, and body assertions. Run them on a schedule, alert on failures. Postman Collections without Postman's $12/user/mo.

Install Assay Free Complete — all 164+ tools — 14-day free trial

Replaces Postman ($12/user/mo).

Define API test cases with expected status codes, headers, and body assertions. Run them on a schedule, alert on failures. Postman Collections without Postman's $12/user/mo. Your data lives in a SQLite file on your disk that you can back up by copying a folder, move to another machine, or query directly with any SQLite tool. The binary keeps running if Stockyard disappears tomorrow, because it is Apache 2.0 and you have a copy.

Quickstart

Running in under a minute.

Stockyard runs on desktops and laptops. To install, open this page on your Mac, Windows, or Linux computer.

After install, open http://localhost:9130 in your browser.

Advanced: install via terminal instead
curl -fsSL https://stockyard.dev/install.sh | sh -s -- --tool assay

Single binary. Embedded SQLite. No Docker. No database. No dependencies.

Pricing

14 days free. Pro when you need it.

Free
$0
forever
  • 10 test cases
  • Single binary, embedded SQLite
  • Apache 2.0 — modify freely
Pro
$7.99
per month
  • Unlimited tests, environments, CI webhook trigger, history and diffs
  • License key, no cloud dependency
  • Email support

License key by email. One env var.

Your license key arrives by email within 5 minutes of checkout. Set it as an environment variable and restart the binary.

export STOCKYARD_LICENSE_KEY=SY-xxxxxxxxxxxxxxxxxxxx
./assay

No cloud connectivity required. The binary validates the key offline with Ed25519 signatures.

Part of the Stockyard family — 164 self-hosted tools · Complete bundle — 14-day free trial · stockyard.dev