Specbook
Storybook for APIs

API docs that come to life

The Swagger UI alternative built for modern teams. Explore APIs, author executable flows once, and publish live documentation instantly. Share everything in a centralized portal and continuously verify your endpoints in production.

Try it nowStart with your spec

See it in action

Call the public Swagger Petstore and instantly see the response validated against the API spec. Or run a flow to chain requests together: find a pet, place an order, and check the order, all in one executable sequence, without leaving your favorite editor.

get-pet.req.ts
export default GetPetById.request({
  name: 'Get a pet',
  tags: ['smoke', 'monitor'],
  path: { petId: '{{petId}}' },
  init: { petId: 1 },
  assert: (res, { assert, vars }) => {
    assert.is(res.status, 200, 'found')
    if (res.status === 200) assert.is(res.data.id, Number(vars.petId), 'the pet that was asked for')
  },
})

Explore the full demo (opens in a new window)

Your API, start to finish

Build with it, document it, test it and watch it in production, all from the same requests and flows.

01

Develop

Write requests and flows beside your spec. Run them as you write, then publish them for the whole team.

Open →02

Document

Markdown beside every operation, or enable Try it on any button on your existing documentation site.

Open →03

Test

QA runs your published flows with a single click, and CI runs the same checks on every change.

Open →04

Monitor

Compile the same tests into one file that runs with just node. Run it on a schedule in production.

Open →