docs(api): add public API documentation site (Astro Starlight)

## Changes
- Add narrative API documentation in docs/api-content/ (introduction,
  quickstart, authentication, conventions, errors, rate limiting)
- Scaffold Astro Starlight site at docs/api/ that consumes prose from
  the sibling api-content folder and auto-generates the endpoint
  reference from server/openapi.json via starlight-openapi
- Wire Checkmate brand color (#13715B) into Starlight via custom CSS
- Add vercel.json so the docs site deploys cleanly as an Astro project
  with root directory docs/api/

## Benefits
- Public API docs ready to publish at checkmate.so/docs
- Endpoint reference stays in sync with the OpenAPI spec automatically
- Zero third-party SaaS dependency: site is fully self-hosted on Vercel
- Contributors edit plain markdown; no Astro knowledge needed for prose
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# Checkmate API documentation
Public-facing API documentation that powers **https://checkmate.so/docs**.
The site is built with [Astro Starlight](https://starlight.astro.build/) — a static-site generator that produces a fast, modern docs site with zero JavaScript by default. Starlight is open source and self-hostable; there is no third-party account required to publish.
## Repository layout
```
docs/
├── api-content/ ← markdown prose (this folder — edit here)
│ ├── introduction.md
│ ├── quickstart.md
│ ├── authentication.md
│ ├── conventions.md
│ ├── errors.md
│ ├── rate-limiting.md
│ └── api-reference/
│ └── overview.md
└── api/ ← Astro Starlight project (build tool — leave alone unless changing the site)
├── package.json
├── astro.config.mjs
├── src/content.config.ts
└── src/styles/checkmate.css
```
**Contributors editing prose only need to touch `docs/api-content/`**. Astro's content loader picks up the markdown automatically.
The endpoint reference (every URL + schema) is **auto-generated from [`server/openapi.json`](../../server/openapi.json)** via the `starlight-openapi` plugin. Adding or changing an endpoint means updating that JSON; the public docs pick it up on the next Vercel build.
## Local preview
```bash
cd docs/api
npm install
npm run dev
```
Visit http://localhost:4321/docs. Hot-reload works for markdown changes in `docs/api-content/`.
To produce the static site:
```bash
npm run build # outputs docs/api/dist/
npm run preview # serve the built output locally
```
## Deploying to checkmate.so/docs
Astro Starlight builds a static site. Deploy on Vercel and reverse-proxy `checkmate.so/docs/*` to it.
### One-time Vercel setup
1. Go to https://vercel.com → New Project → import the `bluewave-labs/Checkmate` GitHub repo.
2. **Root Directory**: set to `docs/api`.
3. **Framework Preset**: Vercel auto-detects Astro from `vercel.json`.
4. **Build & Output**: leave defaults (`npm run build` → `dist/`).
5. **Production Branch**: `develop`.
6. Deploy. Vercel returns a URL like `checkmate-docs.vercel.app`.
7. Verify the site renders correctly.
The deployment auto-rebuilds on every push to `develop` and on every PR (as a preview deploy).
### Reverse-proxy /docs to Vercel
In whichever edge proxy fronts `checkmate.so`, route `/docs/*` to the Vercel deployment.
**Cloudflare Workers:**
```javascript
addEventListener("fetch", (event) => {
const url = new URL(event.request.url);
if (url.pathname === "/docs" || url.pathname.startsWith("/docs/")) {
const target = new URL(url.pathname, "https://checkmate-docs.vercel.app");
target.search = url.search;
return event.respondWith(fetch(target.toString(), event.request));
}
});
```
**nginx:**
```nginx
location /docs/ {
proxy_pass https://checkmate-docs.vercel.app/docs/;
proxy_set_header Host checkmate-docs.vercel.app;
proxy_ssl_server_name on;
}
```
The `base: "/docs"` setting in `astro.config.mjs` ensures every internal link and asset URL is prefixed correctly so the site works at `checkmate.so/docs/...` rather than the root.
## Updating the docs
| Task | What to edit |
|---|---|
| Fix a typo, clarify wording | `docs/api-content/*.md` |
| Add a new narrative page | Add the file to `docs/api-content/`, then add a `slug` entry to `astro.config.mjs` → `sidebar` |
| Fix something in the API reference | Edit `server/openapi.json` (or the route spec it's built from) — never edit the generated reference pages |
| Change branding / colors | `docs/api/src/styles/checkmate.css` |
| Change site config (title, logo, social) | `docs/api/astro.config.mjs` |
Two rules:
1. **Never hand-edit the API reference.** It's regenerated on every build. Fix the spec.
2. **Test code samples against a real instance before merging.** Wrong code in docs is worse than missing code.
## Why Astro Starlight (and not Mintlify, Docusaurus, etc.)
- **No third-party account required.** Self-hostable on any static host.
- **Best looking** of the modern docs frameworks per multiple 2026 reviews — Distr, among others, migrated away from Docusaurus specifically for Starlight's design.
- **Zero JavaScript by default.** Pages are pure HTML — fast load, perfect Lighthouse scores.
- **OpenAPI integration is first-class** via `starlight-openapi`.
- **Markdown is the source of truth.** No proprietary formats. Easy to migrate later if needed.
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---
title: API reference overview
description: All endpoints, grouped by resource. Auto-generated from the OpenAPI spec.
---
# API reference
The full machine-readable specification is at [`server/openapi.json`](https://github.com/bluewave-labs/Checkmate/blob/develop/server/openapi.json). Mintlify renders an interactive reference from it — each endpoint below is fully documented with request/response schemas, examples, and a built-in "Try it" form.
## Endpoint groups
| Group | Description |
|---|---|
| **auth** | Register, log in, password recovery, manage users |
| **invite** | Send and redeem team invites |
| **monitors** | Create, update, pause, and delete monitors |
| **checks** | Read individual check results and team-wide summaries |
| **incidents** | List, filter, and resolve downtime incidents |
| **maintenance-window** | Schedule maintenance windows to silence checks |
| **notifications** | Configure email, Slack, Discord, and webhook channels |
| **status-page** | Manage public status pages |
| **geo-checks** | Multi-region check results |
| **logs** | Audit and operational logs |
| **settings** | Global Checkmate settings |
| **queue** | Background-job queue health (operational) |
| **diagnostic** | System health and version info |
## Authentication
Every endpoint except the unauthenticated auth/recovery routes requires:
```
Authorization: Bearer <jwt>
```
See [Authentication](/api/authentication) for how to obtain a token.
## Conventions recap
- Base URL: `https://your-checkmate-host/api/v1`
- Response envelope: `{ success, msg, data }`
- IDs: 24-character MongoDB ObjectIds
- Timestamps: ISO 8601 UTC
- Durations: integers in milliseconds
- Most resources are team-scoped — pass `teamId` where the path includes `/team/...`
See [Conventions](/api/conventions) for full details.
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---
title: Authentication
description: Obtain a JWT from /auth/login and send it as a Bearer token on every subsequent request.
---
# Authentication
Checkmate uses **JWT bearer tokens**. There are no API keys, no OAuth, and no client secrets. Every API user is a regular Checkmate user — the credentials you log in to the web UI with are the credentials you use to obtain a token.
## The flow
1. **Get a token** by calling `POST /auth/login` with your email and password.
2. **Send the token** as `Authorization: Bearer <token>` on every subsequent request.
3. **Refresh** by calling `POST /auth/login` again before the token expires.
## Obtaining a token
```bash
curl -X POST https://your-checkmate-host/api/v1/auth/login \
-H "Content-Type: application/json" \
-d '{
"email": "you@example.com",
"password": "YourPass1!"
}'
```
A successful response returns the token plus the authenticated user record:
```json
{
"success": true,
"msg": "OK",
"data": {
"user": {
"_id": "65f1c2a4d8b9e0123456789a",
"firstName": "Ada",
"lastName": "Lovelace",
"email": "you@example.com",
"role": ["admin"],
"teamId": "65f1c2a4d8b9e01234567890",
"createdAt": "2026-04-01T10:00:00.000Z",
"updatedAt": "2026-04-15T14:30:00.000Z"
},
"token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9..."
}
}
```
Store both `token` (for the `Authorization` header) and `user.teamId` (most resource endpoints are scoped by team).
## Using a token
Every authenticated request must include:
```
Authorization: Bearer <token>
```
```bash
curl https://your-checkmate-host/api/v1/monitors/team/<teamId> \
-H "Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9..."
```
```javascript
const res = await fetch("https://your-checkmate-host/api/v1/monitors/team/<teamId>", {
headers: { Authorization: `Bearer ${token}` },
});
```
## Token lifetime
Tokens expire after the duration configured by the operator via the `TOKEN_TTL` environment variable. The default is **99 days**.
There is no separate refresh-token endpoint. When a token is close to expiry — or after a 401 response — call `POST /auth/login` again to obtain a new one.
## Roles
The `user.role` claim is an array. Available roles:
| Role | Capability |
|---|---|
| `superadmin` | Full access to all teams and global settings. Can promote other users. |
| `admin` | Full access within their team. |
| `user` | Read access within their team. |
| `demo` | Limited demo-mode access. |
A user can hold multiple roles simultaneously.
## Registering the first user
A fresh Checkmate instance has no users. The first call to `POST /auth/register` creates the first **superadmin** and provisions a team for them:
```bash
curl -X POST https://your-checkmate-host/api/v1/auth/register \
-H "Content-Type: application/json" \
-d '{
"firstName": "Ada",
"lastName": "Lovelace",
"email": "ada@example.com",
"password": "Hunter2!",
"role": ["superadmin"],
"teamId": ""
}'
```
After the first user exists, additional users are usually created via the invite flow rather than `POST /auth/register`:
```
POST /invite/send # superadmin/admin sends an invite
POST /auth/register # invitee redeems the invite token
```
You can check whether a superadmin already exists with:
```bash
curl https://your-checkmate-host/api/v1/auth/users/superadmin
```
```json
{ "success": true, "data": true }
```
## Password recovery
The password-recovery flow is three calls, all unauthenticated:
```
POST /auth/recovery/request # user requests a recovery email
POST /auth/recovery/validate # client validates the recovery token
POST /auth/recovery/reset # user sets a new password
```
## Logging out
JWTs are stateless — there is no server-side logout. Drop the token from your client storage. If you need to invalidate a token before its expiry (e.g. a compromised device), the operator must rotate the `JWT_SECRET` environment variable, which invalidates every outstanding token.
Next: [Conventions](/api/conventions).
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---
title: Conventions
description: Response envelope, request format, identifiers, pagination, and team scoping.
---
# Conventions
A small number of conventions apply to every endpoint. Once you've internalized them, the per-resource reference is mostly self-explanatory.
## Request format
- **Content-Type**: `application/json` for all POST/PUT/PATCH bodies, except multipart uploads (logos, profile images), which use `multipart/form-data`.
- **Charset**: UTF-8.
- **Method semantics**:
- `GET` — read, never mutates state.
- `POST` — create, or action that doesn't fit GET/PATCH/DELETE.
- `PATCH` — partial update.
- `PUT` — full replace.
- `DELETE` — delete.
## Response envelope
Every JSON response uses the same shape:
```json
{
"success": true,
"msg": "OK",
"data": { /* endpoint-specific payload */ }
}
```
| Field | Type | Meaning |
|---|---|---|
| `success` | boolean | `true` on 2xx, `false` on 4xx/5xx |
| `msg` | string | Human-readable summary — safe to surface in UIs |
| `data` | object \| array \| null | Endpoint-specific payload. Absent or `null` for `204 No Content`. |
Error responses use the same envelope with `success: false` and `data` typically omitted. See [Errors](/api/errors).
## Identifiers
- All resource IDs are **MongoDB ObjectIds** (24-character hex strings):
```
65f1c2a4d8b9e0123456789a
```
- Treat IDs as opaque strings. Do not attempt to parse the timestamp or counter components.
## Team scoping
Most resources belong to a **team**. After login, the user record contains a `teamId`; pass it as a path parameter wherever the endpoint name includes `/team/...`:
```
GET /monitors/team/65f1c2a4d8b9e01234567890
GET /incidents/team
GET /checks/team
```
Users only see resources belonging to their own team, except for `superadmin`, who can read across teams.
## Date and time
- All timestamps in JSON are **ISO 8601** strings in UTC:
```
"createdAt": "2026-04-01T10:00:00.000Z"
```
- Durations are typically integers in **milliseconds** (intervals, response times, time windows).
## Pagination
Endpoints that return collections accept these optional query parameters:
| Parameter | Type | Default | Notes |
|---|---|---|---|
| `limit` | integer | endpoint-dependent | Maximum rows to return. |
| `page` | integer | `0` | Zero-indexed page number. |
| `sortBy` | string | endpoint-dependent | Field to sort by. |
| `sortOrder` | `asc` \| `desc` | `desc` | Sort direction. |
| `filter` | string | — | Endpoint-specific filter (e.g. status). |
When a collection supports pagination, the response `data` includes the rows plus the total count:
```json
{
"success": true,
"msg": "OK",
"data": {
"monitors": [ /* … */ ],
"filteredMonitors": [ /* … */ ],
"summary": { /* counters */ }
}
}
```
Exact shapes vary per endpoint. See the [API reference](/api/reference) for each endpoint's response schema.
## File uploads
Two endpoints accept files:
- Status page logo: `POST /status-page` (multipart, field `logo`)
- User profile picture: `POST /auth/register`, `PATCH /auth/user/:id` (multipart, field `profileImage`)
Use `multipart/form-data` and include the JSON fields as separate form parts.
## CORS
The server's CORS policy is configured via the `CLIENT_HOST` environment variable. Only requests whose `Origin` matches `CLIENT_HOST` are accepted, and credentials (cookies) are allowed.
If you're calling the API from a browser on a different origin, the operator must add that origin to `CLIENT_HOST`. Server-to-server calls (curl, your backend) are not subject to CORS.
## Versioning
The base path includes the API version:
```
/api/v1/...
```
Within `v1`, additive changes (new endpoints, new optional fields) ship without notice. Breaking changes (removed endpoints, changed field types) only ship under a new major version.
Next: [Errors](/api/errors).
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---
title: Errors
description: HTTP status codes Checkmate returns, what they mean, and how to handle them.
---
# Errors
Failure responses share the same envelope as successful ones, with `success: false` and `data` omitted (or `null`):
```json
{
"success": false,
"msg": "Validation failed: email must be a valid email"
}
```
Always treat the **HTTP status code** as the source of truth for handling logic, and surface `msg` to humans.
## Status codes
| Status | Meaning | When you'll see it |
|---|---|---|
| `200 OK` | Request succeeded with a body | Most GETs, successful mutations that return the new resource |
| `204 No Content` | Request succeeded with no body | DELETEs, successful actions like `/status-page/:url/unlock` |
| `400 Bad Request` | Malformed request | Missing required path param, malformed JSON, invalid file upload |
| `401 Unauthorized` | Missing or invalid JWT | Token expired, token missing, token signed with a different secret |
| `403 Forbidden` | Authenticated, but not allowed | Accessing a resource that belongs to a different team, or insufficient role |
| `404 Not Found` | Resource doesn't exist | Wrong ID, deleted resource, mistyped path |
| `409 Conflict` | Operation would violate a constraint | Duplicate email on register, slug already taken on status page |
| `413 Payload Too Large` | File upload exceeded limit | Logo or profile image too big |
| `422 Unprocessable Entity` | Request was well-formed but failed validation | Zod / Joi schema rejected the body |
| `429 Too Many Requests` | Rate limit exceeded | See [Rate limiting](/api/rate-limiting) |
| `500 Internal Server Error` | Unexpected server error | A bug — report it with the request ID |
## Common shapes
### 401 — missing or invalid token
```json
{
"success": false,
"msg": "No auth token provided"
}
```
Re-authenticate by calling `POST /auth/login`.
### 422 — validation error
```json
{
"success": false,
"msg": "\"email\" must be a valid email"
}
```
The `msg` describes the first failing field. Re-send the request with the fix.
### 403 — forbidden
```json
{
"success": false,
"msg": "Forbidden"
}
```
You're authenticated but the resource isn't visible to you. Common cause: passing a `teamId` that isn't your team's.
### 429 — rate limited
```json
{
"success": false,
"msg": "Too many requests"
}
```
Inspect `RateLimit-*` response headers and back off. See [Rate limiting](/api/rate-limiting).
## Error handling pattern
Client code should branch on status code, not on `msg`:
```javascript
const res = await fetch(url, opts);
const body = await res.json().catch(() => ({}));
switch (res.status) {
case 200:
case 204:
return body.data;
case 401:
// Token expired or missing — re-authenticate, then retry once.
await reauthenticate();
return retry();
case 422:
// Surface the validation error to the user.
throw new ValidationError(body.msg);
case 429:
// Back off using Retry-After if present.
const retryAfter = Number(res.headers.get("Retry-After") ?? 60);
await sleep(retryAfter * 1000);
return retry();
default:
throw new Error(`Checkmate API ${res.status}: ${body.msg ?? res.statusText}`);
}
```
## Reporting bugs
If you see a `500`, capture:
- The exact request (method, path, body — **redact secrets**)
- The full response body and headers
- A timestamp in UTC
Open an issue at https://github.com/bluewave-labs/Checkmate/issues with that information.
Next: [Rate limiting](/api/rate-limiting).
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---
title: Introduction
description: Use the Checkmate REST API to manage monitors, incidents, status pages, notifications, and users programmatically.
---
# Checkmate API
Checkmate exposes a REST API that mirrors everything the web UI can do. Use it to provision monitors from infrastructure-as-code, build internal dashboards, automate incident workflows, or integrate Checkmate into your existing alerting stack.
The web UI you log in to is itself just a client of this same API.
## Base URL
```
https://<your-checkmate-host>/api/v1
```
Replace `<your-checkmate-host>` with the domain where you deployed Checkmate. For local development:
```
http://localhost:52345/api/v1
```
All endpoints are relative to this base. Every path on this page is shown without the `/api/v1` prefix — prepend it when making requests.
## API stability
The API is at version **`v1`** and is considered stable. Breaking changes will only ship under a new major version (`/api/v2`).
## What you can do
| Resource | What it covers |
|---|---|
| `monitors` | Create, update, pause, and delete monitors of any type (HTTP, Ping, Port, DNS, Docker, PageSpeed, gRPC, WebSocket, Game, Hardware) |
| `checks` | Read individual check results and aggregated stats |
| `incidents` | List, filter, and resolve downtime incidents |
| `notifications` | Manage notification channels (email, Slack, Discord, webhooks) |
| `status-page` | Configure public status pages |
| `maintenance-window` | Schedule maintenance windows so checks don't fire incidents |
| `geo-checks` | Multi-region check results |
| `auth` | Register, log in, manage users |
| `invite` | Invite teammates |
| `logs` | Audit and operational logs |
| `settings` | Tune global Checkmate settings |
| `queue` | Inspect the background-job queue (operational) |
| `diagnostic` | Health and system info |
## What you'll need
1. A running Checkmate instance you administer.
2. A user account on that instance.
3. A JWT obtained by calling `POST /auth/login` — see [Authentication](/api/authentication).
There is no separate "API key" concept in Checkmate. The same JWT that authenticates the web UI authenticates every API call.
## Response shape
Every endpoint returns the same envelope:
```json
{
"success": true,
"msg": "OK",
"data": { /* endpoint-specific payload */ }
}
```
See [Conventions](/api/conventions) for the full contract and [Errors](/api/errors) for failure shapes.
## Quick example
```bash
# 1. Log in to get a token
TOKEN=$(curl -s -X POST https://your-checkmate-host/api/v1/auth/login \
-H "Content-Type: application/json" \
-d '{"email":"you@example.com","password":"YourPass1!"}' \
| jq -r '.data.token')
# 2. List your team's monitors
curl https://your-checkmate-host/api/v1/monitors/team/<teamId> \
-H "Authorization: Bearer $TOKEN"
```
Next: [Authentication](/api/authentication).
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---
title: Quickstart
description: From zero to a working monitor in under five minutes.
---
# Quickstart
This walkthrough creates a Checkmate user, logs in, provisions an HTTP monitor, and reads its checks — all via the API.
It assumes you have a Checkmate instance running and reachable. Substitute `https://your-checkmate-host` with your actual host throughout.
## 1. Register the first user
If your instance is fresh, the first user becomes a superadmin:
```bash
curl -X POST https://your-checkmate-host/api/v1/auth/register \
-H "Content-Type: application/json" \
-d '{
"firstName": "Ada",
"lastName": "Lovelace",
"email": "ada@example.com",
"password": "Hunter2!Hunter2!",
"role": ["superadmin"],
"teamId": ""
}'
```
The response includes a JWT and a freshly-created `teamId`. Save both.
If a superadmin already exists, skip to step 2 and use existing credentials.
## 2. Log in
If you already have an account:
```bash
TOKEN=$(curl -s -X POST https://your-checkmate-host/api/v1/auth/login \
-H "Content-Type: application/json" \
-d '{"email":"ada@example.com","password":"Hunter2!Hunter2!"}' \
| jq -r '.data.token')
TEAM_ID=$(curl -s -X POST https://your-checkmate-host/api/v1/auth/login \
-H "Content-Type: application/json" \
-d '{"email":"ada@example.com","password":"Hunter2!Hunter2!"}' \
| jq -r '.data.user.teamId')
echo "Token: $TOKEN"
echo "Team: $TEAM_ID"
```
## 3. Create a monitor
This creates an HTTP monitor that probes example.com every 60 seconds:
```bash
curl -X POST https://your-checkmate-host/api/v1/monitors \
-H "Authorization: Bearer $TOKEN" \
-H "Content-Type: application/json" \
-d "{
\"name\": \"example.com\",
\"type\": \"http\",
\"url\": \"https://example.com\",
\"interval\": 60000,
\"teamId\": \"$TEAM_ID\",
\"isActive\": true
}"
```
A successful response returns the new monitor including its `_id`.
## 4. List your team's monitors
```bash
curl https://your-checkmate-host/api/v1/monitors/team/$TEAM_ID \
-H "Authorization: Bearer $TOKEN"
```
You should see the monitor you just created. Within a minute, the background worker will have run a few checks against it.
## 5. Read recent checks
Replace `<MONITOR_ID>` with the `_id` from step 3:
```bash
curl "https://your-checkmate-host/api/v1/checks/<MONITOR_ID>?limit=10" \
-H "Authorization: Bearer $TOKEN"
```
You'll see an array of check results — status code, response time, timestamp, region (if applicable).
## 6. Pause and delete the monitor
Pause:
```bash
curl -X PATCH https://your-checkmate-host/api/v1/monitors/<MONITOR_ID> \
-H "Authorization: Bearer $TOKEN" \
-H "Content-Type: application/json" \
-d '{"isActive": false}'
```
Delete:
```bash
curl -X DELETE https://your-checkmate-host/api/v1/monitors/<MONITOR_ID> \
-H "Authorization: Bearer $TOKEN"
```
## What's next
- **Set up notifications** — `POST /notifications` to wire email / Slack / Discord / webhook channels, then attach them to monitors.
- **Build a status page** — `POST /status-page` to publish your monitors publicly.
- **Schedule maintenance** — `POST /maintenance-window` to silence checks during planned downtime.
- **Browse the full API reference** — see every endpoint with request/response schemas.
See the [reference](/api/reference) for the complete list of endpoints.
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---
title: Rate limiting
description: Per-IP request limits, headers, and how to back off.
---
# Rate limiting
Checkmate applies two per-IP rate limiters, both with a **60-second window**:
| Limiter | Applies to | Limit |
|---|---|---|
| General | All requests under `/api/v1/*` | **600 requests / 60 seconds** |
| Auth-sensitive | `/auth/login`, `/auth/register`, `/auth/recovery/*`, `/status-page/:url/unlock` | **15 requests / 60 seconds** |
The two limiters are **independent**. Auth-sensitive endpoints count against both buckets — you can hammer `/auth/login` 15 times in a minute before being rate-limited there, but a single client can never exceed 600 total requests per minute regardless of which endpoints are called.
## Headers
Every response includes the standard `RateLimit-*` headers so you can pace yourself proactively:
```
RateLimit-Limit: 600
RateLimit-Remaining: 587
RateLimit-Reset: 42
```
| Header | Meaning |
|---|---|
| `RateLimit-Limit` | The cap for the current window. |
| `RateLimit-Remaining` | Requests left before you hit `429`. |
| `RateLimit-Reset` | Seconds until the window resets. |
## When you exceed the limit
You receive `HTTP 429 Too Many Requests`:
```json
{
"success": false,
"msg": "Too many requests"
}
```
The response also includes `Retry-After`:
```
Retry-After: 42
```
Wait that many seconds before retrying. If `Retry-After` is missing, fall back to the `RateLimit-Reset` header.
## Recommended backoff
For one-off scripts, simple sleep-then-retry is fine:
```javascript
async function callWithRetry(url, opts, attempts = 3) {
for (let i = 0; i < attempts; i++) {
const res = await fetch(url, opts);
if (res.status !== 429) return res;
const retry = Number(res.headers.get("Retry-After") ?? 60);
await new Promise(r => setTimeout(r, retry * 1000));
}
throw new Error("Rate limit retry exhausted");
}
```
For higher-throughput integrations, watch `RateLimit-Remaining` and pace your sender to stay below the limit rather than waiting for `429`.
## Limits and proxies
Rate-limiting is per **client IP**, derived from the connection — or, when Checkmate is behind a reverse proxy with `trust proxy` configured, from the leftmost public IP in `X-Forwarded-For`.
If many of your clients share an egress IP (NAT, corporate proxy), they share the bucket. In that case, an operator should either:
- Increase the limits (server code change required), or
- Make sure each client connects from a distinct IP.
## Limits are not contractual
The numbers above reflect the current defaults. An operator can change them at any time (they're hardcoded in `server/src/middleware/rateLimiter.ts`). If you're building an integration that depends on a higher limit, coordinate with the operator first.
Next: [API reference](/api/reference) — auto-generated from the OpenAPI spec.
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# Astro build
dist/
.astro/
# Dependencies
node_modules/
# Logs
npm-debug.log*
yarn-debug.log*
yarn-error.log*
pnpm-debug.log*
# Env
.env
.env.production
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import { defineConfig } from "astro/config";
import starlight from "@astrojs/starlight";
import starlightOpenAPI, { openAPISidebarGroups } from "starlight-openapi";
// The OpenAPI spec lives in the server package. The Starlight integration
// reads it at build time and generates the full /api/reference/* tree.
const OPENAPI_PATH = "../../server/openapi.json";
export default defineConfig({
// Served at https://checkmate.so/docs — the leading slash is included so
// every internal link resolves correctly when fronted by a reverse proxy.
base: "/docs",
site: "https://checkmate.so",
integrations: [
starlight({
title: "Checkmate API",
description: "Use the Checkmate REST API to manage monitors, incidents, status pages, notifications, and users programmatically.",
// Prose markdown is loaded from /docs/api-content via the custom
// docsLoader in src/content.config.ts. Keeping content outside the
// Astro project tree means contributors can edit it without dealing
// with Astro / Starlight tooling.
logo: {
src: "./src/assets/logo.svg",
replacesTitle: true,
},
favicon: "/favicon.svg",
customCss: ["./src/styles/checkmate.css"],
social: {
github: "https://github.com/bluewave-labs/Checkmate",
},
sidebar: [
{
label: "Getting started",
items: [
{ label: "Introduction", slug: "introduction" },
{ label: "Quickstart", slug: "quickstart" },
{ label: "Authentication", slug: "authentication" },
],
},
{
label: "Core concepts",
items: [
{ label: "Conventions", slug: "conventions" },
{ label: "Errors", slug: "errors" },
{ label: "Rate limiting", slug: "rate-limiting" },
],
},
{
label: "API reference",
items: [
{ label: "Overview", slug: "api-reference/overview" },
// The OpenAPI plugin appends every endpoint under this group.
...openAPISidebarGroups,
],
},
],
plugins: [
starlightOpenAPI([
{
base: "api-reference",
label: "REST API",
schema: OPENAPI_PATH,
},
]),
],
}),
],
});
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{
"name": "checkmate-docs-api",
"type": "module",
"version": "0.1.0",
"private": true,
"description": "Public API documentation for Checkmate. Built with Astro Starlight.",
"scripts": {
"dev": "astro dev",
"start": "astro dev",
"build": "astro build",
"preview": "astro preview",
"astro": "astro"
},
"dependencies": {
"@astrojs/starlight": "^0.30.0",
"astro": "^5.0.0",
"sharp": "^0.33.5",
"starlight-openapi": "^0.13.0"
}
}
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<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 200 32" fill="none">
<rect x="2" y="6" width="20" height="20" rx="4" fill="#13715B"/>
<path d="M7 16l3.5 3.5L17 12" stroke="white" stroke-width="2.4" stroke-linecap="round" stroke-linejoin="round"/>
<text x="30" y="22" font-family="-apple-system, BlinkMacSystemFont, 'Inter', sans-serif" font-size="18" font-weight="600" fill="currentColor">Checkmate</text>
</svg>

After

Width:  |  Height:  |  Size: 424 B

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import { defineCollection } from "astro:content";
import { docsLoader } from "@astrojs/starlight/loaders";
import { docsSchema } from "@astrojs/starlight/schema";
// Load markdown from a sibling folder so prose lives outside the Astro
// project tree. Contributors edit /docs/api-content/*.md without touching
// the build tool.
export const collections = {
docs: defineCollection({
loader: docsLoader({ base: "../api-content" }),
schema: docsSchema(),
}),
};
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/* Checkmate brand colors layered on top of Starlight defaults. */
:root {
--sl-color-accent-low: #0e5a48;
--sl-color-accent: #13715b;
--sl-color-accent-high: #1a8a6f;
--sl-color-white: #ffffff;
--sl-color-gray-1: #eef2f0;
--sl-color-gray-2: #c9d3cf;
--sl-color-gray-3: #95a39d;
--sl-color-gray-4: #5c6d66;
--sl-color-gray-5: #3a4844;
--sl-color-gray-6: #2a3531;
--sl-color-black: #1a201e;
}
/* Light mode tweaks so the green accent reads against white. */
:root[data-theme="light"] {
--sl-color-accent-low: #d0e4dc;
--sl-color-accent: #13715b;
--sl-color-accent-high: #0e5a48;
--sl-color-text-accent: #0e5a48;
}
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{
"extends": "astro/tsconfigs/strict",
"include": [".astro/types.d.ts", "**/*"],
"exclude": ["dist"]
}
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{
"$schema": "https://openapi.vercel.sh/vercel.json",
"buildCommand": "npm run build",
"outputDirectory": "dist",
"framework": "astro",
"installCommand": "npm install"
}