Module 09 · API

StellarFirm API endpoints

Every public StellarFirm API route with its method, what it needs, and what it answers. The same list is in the OpenAPI 3.1 file at /openapi.json.

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The routes below are the whole public StellarFirm API. Each one is also in the OpenAPI file, with its parameters and answer schemas. A route answers 405 with an Allow header for any method not listed here.

At a glance#

Method and path	Sign-in	What it does
`GET /api/health`	None	Says the web app is up.
`GET /api/site-banner`	None	Reads the notice at the top of the site.
`GET /api/entitlement`	Session	Says whether the account may run.
`GET /api/credits/balance`	Session	Reads the account's credits.
`POST /api/email/unsubscribe`	Signed token	Stops the later onboarding emails.

GET /api/health#

Answers 200 with ok: true while the web app is running. Use it for an uptime check.

json
{ "ok": true, "service": "...", "surface": "ui", "agent": "not-hosted-here" }

The notice shown at the top of the site, or null when there is none. It is the same for everyone and may be cached for half a minute.

Field	Type	Meaning
`banner`	object or null	The notice, or `null`.
`banner.kind`	`promo` or `warning`	A `promo` shows on the public site only. A `warning` shows everywhere.
`banner.message`	string	The notice text.

GET /api/entitlement#

Says whether the signed-in account may run: an active trial, a licence, or free Hobby after the trial. Only a 200 with ok: true means the account may run. It is never cached.

Status	`status` field	Meaning
200	`licensed`, `trial` or `hobby`	The account may run. Ask again within `recheckAfterSeconds`.
401	`signed-out`	No signed-in session.
403	`invalid`	The account may not run.
503	`unconfigured` or `unavailable`	The account could not be checked. Try again shortly.

Every answer except 200 also carries the standard error object. See Errors.

GET /api/credits/balance#

The account's balance as a number of StellarFirm credits, never money. Answers { "credits": 120 } for example. It answers 503 with the code balance_unavailable when the balance cannot be read.

POST /api/email/unsubscribe#

One-click unsubscribe from the later onboarding emails. Send the token from the link in the email as the query parameter. It answers 200 with a plain text line, 400 with invalid_token for a token that is not valid, and 502 with upstream_failed when the later emails are still scheduled and you should try again.

Unknown routes#

Any other address under /api answers 404 with the error code not_found, in JSON, never an HTML page.

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