NXT DEVBeta

Everything around your code, on one bench.

Webhooks coming in, signed events going out, uptime, errors, an HTTP client, browser utilities and AI code review — one workspace that tells you what broke, where, and what to do next.

Start with NXT DEV Read the spec sheet

Inbox: any method · 7 days
Uptime: 5 / 15 / 60 min
Errors: grouped · 30 days

4 up1 down3 open issues212 captures / 24 h

Needs attention

3 open

Checkout API is down
https://api.example.com/health · failing since 14 min ago · HTTP 503
Open
TypeError: Cannot read properties of undefined (reading 'items')
error · 41 events · last 6 min ago
Triage
2 webhook deliveries failed
Latest: dev.monitor.down · 502
Retry

Uptime

last 24 h

Checkout API87.5%down · 3 failures in a row · every 5 min
Marketing site100%up · 182 ms avg · every 5 min
Public API health99.9%up · 94 ms avg · every 5 min

POST/stripe1.9 KBjust now

Headers · from 203.0.113.24

content-type: application/json
stripe-signature: t=1791…,v1=5257a8… (redacted)
user-agent: Stripe/1.0 (+https://stripe.com/docs/webhooks)

Body · application/json

{
  "id": "evt_1Q2w3E4r5T6y",
  "type": "charge.succeeded",
  "data": { "object": { "amount": 4900, "currency": "usd" } }
}

14:02:17POST/stripe1.9 KBStripe test events
14:01:55POST/github7.4 KBGitHub push hooks
13:58:40PUT/orders/8812412 BPartner sandbox
13:57:02GET/health?probe=10 BPartner sandbox
13:41:18DELETE/sessions/old0 BPartner sandbox

DownCheckout APIGET https://api.example.com/health87.50% 24 h uptime— avg response
UpMarketing siteHEAD https://www.example.com/100.00% 24 h uptime182 ms avg response
UpStatus pageGET https://status.example.com/99.79% 24 h uptime240 ms avg response

TypeErrorCannot read properties of undefined (reading 'items')errorfirst seen 2 days ago · last 6 min ago41events
DatabaseErrorSQLITE_BUSY: database is lockedfatalfirst seen 3 h ago · last 2 h ago7events
DeprecationWarningBuffer() is deprecated due to security and usability issueswarningfirst seen 9 days ago · last 1 h ago112events

Preview · sample data

The loop

Capture. Watch. Triage. Notify.

Four jobs that usually live in four different tools. In NXT DEV they share one overview that answers “what needs me right now?”

01
Capture
Point Stripe, GitHub or your own service at a capture URL and read every request — method, path, headers, body.
POST /nxt-dev/api/hooks/…
02
Watch
Uptime checks on a schedule; down after two failures; alerts in the app, by email and as signed webhooks.
GET https://api.example.com/health
03
Triage
Errors your apps send are grouped into issues, with regressions reopened automatically.
POST /nxt-dev/api/v1/events
04
Notify
Signed NXT CLOUD events delivered to your endpoint with retries and a delivery log.
NXT-Signature: t=…,v1=…

Webhook inbox

See exactly what a service sends you

Create a capture URL, paste it into a provider’s webhook settings and read each request before you write the handler. Any method, any path under the URL.

JSON bodies pretty-printed, headers listed in order
Authorization, cookie and API-key headers redacted on capture
Latest 200 requests per inbox, kept for 7 days

POST/stripe1.9 KBjust now

Headers · from 203.0.113.24

content-type: application/json
stripe-signature: t=1791…,v1=5257a8… (redacted)
user-agent: Stripe/1.0 (+https://stripe.com/docs/webhooks)

Body · application/json

{
  "id": "evt_1Q2w3E4r5T6y",
  "type": "charge.succeeded",
  "data": { "object": { "amount": 4900, "currency": "usd" } }
}

14:02:17POST/stripe1.9 KBStripe test events
14:01:55POST/github7.4 KBGitHub push hooks
13:58:40PUT/orders/8812412 BPartner sandbox
13:57:02GET/health?probe=10 BPartner sandbox
13:41:18DELETE/sessions/old0 BPartner sandbox

Preview · sample data

Uptime & errors

Know it broke before your users tell you

Monitors check your URLs from Cloudflare’s network and alert on real transitions only. Errors sent with an ingest key are grouped into issues, and a resolved issue that comes back is reopened as a regression.

Uptime, average and p95 response time per monitor
Resolve, ignore or reopen issues; regressions reopen themselves
dev.monitor.down, dev.monitor.recovered and dev.issue.created webhooks

DownCheckout APIGET https://api.example.com/health87.50% 24 h uptime— avg response
UpMarketing siteHEAD https://www.example.com/100.00% 24 h uptime182 ms avg response
UpStatus pageGET https://status.example.com/99.79% 24 h uptime240 ms avg response

Preview · sample data

TypeErrorCannot read properties of undefined (reading 'items')errorfirst seen 2 days ago · last 6 min ago41events
DatabaseErrorSQLITE_BUSY: database is lockedfatalfirst seen 3 h ago · last 2 h ago7events
DeprecationWarningBuffer() is deprecated due to security and usability issueswarningfirst seen 9 days ago · last 1 h ago112events

Preview · sample data

The bench

The tools you open twenty times a day

Small, sharp utilities next to the things they’re used for — no tab-hopping between random websites with your tokens in the clipboard.

GET https://api.example.com/v1/things
HTTP client
Call any public API from our servers and inspect status, timing, headers and a pretty-printed body.
cron "*/15 9-17 * * 1-5"
Utilities
JSON, JWT, Base64, URL, hash & HMAC, UUID v4/v7, timestamps, regex and cron — in your browser, nothing uploaded.
review --focus security
AI code review
Paste a diff; get bugs, security, performance and readability notes with the line quoted and a fix.
cloudflare/workers-sdk
GitHub insights
Stars, languages, releases, recent commits and top contributors for any public repository.

API

Two endpoints. That’s the integration.

Send errors with an API key that has the dev:ingest scope; verify the events we send you with an HMAC you already know how to check.

Send an error

curl -X POST https://nxtcloud.app/nxt-dev/api/v1/events \
  -H "Authorization: Bearer $NXT_API_KEY" \
  -H "content-type: application/json" \
  -d '{"level":"error","type":"TypeError",
       "message":"x is undefined",
       "release":"1.4.2","environment":"production"}'

Verify an NXT CLOUD webhook (Node.js)

const [t, v1] = header.split(',').map((p) => p.split('=')[1]);
const expected = createHmac('sha256', secret)
  .update(`${t}.${rawBody}`).digest('hex');
if (!timingSafeEqual(Buffer.from(expected), Buffer.from(v1))) reject();

Error ingest answers 202 {"accepted":1} and counts toward your plan’s monthly event allowance.

Spec sheet

Exact limits, not adjectives

What NXT DEV does, in the numbers the product enforces today.

NXT DEV limits and behaviour
Area	What	Value
Webhook inbox	Capture URLs per person	`20`
Webhook inbox	Requests kept per inbox	`latest 200, for 7 days`
Webhook inbox	Body stored per request	`64 KB (larger bodies are marked truncated)`
Webhook inbox	Auth headers	`authorization, cookie and API-key headers are redacted`
Uptime	Check interval	`every 5, 15 or 60 minutes · 10 s timeout`
Uptime	Marked down after	`2 failed checks in a row (no alert for a single blip)`
Uptime	Monitors per workspace	`10 · check history kept 30 days`
Errors	Grouping	`type + normalised message + first stack frame, or your fingerprint`
Errors	Retention	`30 days · latest 50 events per issue · up to 50 events per request`
HTTP client	Network	`sent from NXT CLOUD servers · private addresses blocked · redirects shown, not followed`
HTTP client	Response size	`capped at 256 KB · nothing stored`
Outgoing webhooks	Retries	`1 min, 5 min, 30 min, 2 h, 6 h, 12 h, 24 h — then marked dead`

GitHub insights cover public repositories; private repositories aren’t supported.
Code sent to AI review goes to an AI model to produce the review and isn’t stored by NXT DEV. AI reviews can be wrong.
Which sections each plan includes is listed with the plans below; sections outside your plan show a lock, never a broken page.

Plans

NXT DEV plans

Priced per workspace. Annual billing costs ten months instead of twelve.

NXT DEV Pro $53.00 / month or $530.00 a year — save $106.00 Not on sale yet

See every limit and compare plans on the pricing page.

Ecosystem

Works well with

Same account, same workspace, no extra sign-up.

NXT AIA specialist AI toolbox, not another chatbot.NXT DEFENDKnow your security posture.NXT CLOUDOne account for every NXT product.

Everything around your code, on one bench.

Capture. Watch. Triage. Notify.

Capture

Watch

Triage

Notify

See exactly what a service sends you

Know it broke before your users tell you

The tools you open twenty times a day

HTTP client

Utilities

AI code review

GitHub insights

Two endpoints. That’s the integration.

Exact limits, not adjectives

NXT DEV plans

Works well with