ForHosting KIT

Everything you need.
One Kit.

Hundreds of ready-made tasks — PDF, images, audio, OCR, text AI, scraping, data and more — behind a single REST API. Send a job, get a finished result by webhook. No servers, no per-model tokens, a price you can read.

REST APILive
EmailLive
Webforhosting.com/kitLive
TelegramLive
iOS & AndroidBuilding
WhatsAppComing
7554ready-made tools
6channels
1API & key
$0.002per call, from

New capabilities

Fresh in the kit — just landed.

New⚙️ Developer UtilitiesVolume to density calculatorρ=m/V from mass and volumeAabuela$0.002Open phys.volume_to_densityNew⚙️ Developer UtilitiesVoltage regulation calculator% from no-load and full-load VSsamurai$0.002Open phys.voltage_regulationNew⚙️ Developer UtilitiesVickers hardness number calculatorHV from force and diagonalPPavilion$0.002Open phys.vickers_hardness_numberNew⚙️ Developer UtilitiesVelocity calculatoraverage v = d/t in metres per secondAabuela$0.002Open phys.velocityNew⚙️ Developer UtilitiesValve flow coefficient calculatorCv from GPM, ΔP and GSsamurai$0.002Open phys.valve_flow_coefficientNew⚙️ Developer UtilitiesBarrel twist rate calculatorGreenhill formula, one turn per inchPPavilion$0.002Open phys.twist_rateNew⚙️ Developer UtilitiesTrue strain calculatorε_t = ln(1+ε) from engineering strainAabuela$0.002Open phys.true_strainNew⚙️ Developer UtilitiesTransmission coefficient calculatorpower T from η₁, η₂Ssamurai$0.002Open phys.transmissionNew⚙️ Developer UtilitiesTorsional stiffness calculatorκ = GJ/L in N·m/rad, freePPavilion$0.002Open phys.torsional_stiffnessNew⚙️ Developer UtilitiesTorsional spring calculatorκ = E d⁴ / (64 D N), N·mm/radAabuela$0.002Open phys.torsional_springNew⚙️ Developer UtilitiesToilet paper race mass moment of inertiaI = ½m(ri²+ro²)Ssamurai$0.002Open phys.toilet_paper_race_mass_moment_inertiaNew⚙️ Developer UtilitiesTime dilation calculatordilated time from proper time and velocityPPavilion$0.002Open phys.time_dilation

The full catalog

Search or filter by category. Every capability is its own endpoint with a published price.

🔔 Notifications & FlowsTemporarily withdrawn
Send a transactional email
from your domain, with delivery events
NNitro
POST /notify/email$0.002
🔔 Notifications & FlowsTemporarily withdrawn
Send email from a template
merge your variables
NNitro
POST /notify/email-template$0.002
🔔 Notifications & FlowsTemporarily withdrawn
Email a file as attachment
deliver the invoice you just made
NNitro
POST /notify/email-attachment$0.002
🔔 Notifications & FlowsAPI
Schedule an email
send it later, cancel before it goes
NNitro
POST /notify/email-scheduled$0.002
🔔 Notifications & FlowsTemporarily withdrawn
Turn an email into a webhook
attachments included
NNitro
POST /notify/email-in$0.002
🔔 Notifications & FlowsAPI
Batch events into one daily email
instead of fifty pings
NNitro
POST /notify/digest$0.002
🔔 Notifications & FlowsAPI
Deliver webhooks reliably
signed, retried, dead-lettered
NNitro
POST /notify/webhook$0.002
🔔 Notifications & FlowsAPI
Send a message to Slack
formatted, on web, email or API
NNitro
POST /notify/slack$0.002
🔔 Notifications & FlowsAPI
Post to a Discord channel
embeds, on web, email or API
NNitro
POST /notify/discord$0.002
🔔 Notifications & FlowsAPI
Route an alert to the right channel
deduplicated for you
NNitro
POST /notify/alert$0.002
🔔 Notifications & FlowsSoon
Chain tasks together
transcribe → summarise → publish, one job
NNitro
POST /flow/chain$0.000
🔔 Notifications & FlowsSoon
Run tasks in parallel
fan out, then join the results
NNitro
POST /flow/parallel$0.000
🔔 Notifications & FlowsSoon
Branch your workflow
decide on the previous step's result
NNitro
POST /flow/conditional$0.000
🔔 Notifications & FlowsAPI
Run one task over 100,000 items
batched, one job
NNitro
POST /flow/batch$0.002
🔔 Notifications & FlowsAPI
Schedule a task
run any KIT task on a cron schedule
NNitro
POST /flow/schedule$0.002
🔔 Notifications & FlowsAPI
Retry failed tasks
exponential backoff and a dead-letter queue
NNitro
POST /flow/retry$0.002
⚙️ Developer UtilitiesFree
Subnet calculator
CIDR, mask, hosts and ranges, free
NNitro
POST /dev/subnet$0.002
✅ ValidationFree
Color contrast checker
test WCAG AA and AAA in your browser
GGala
POST /verify/color-contrast$0.002
⚙️ Developer UtilitiesFree
Remove tracking parameters from a URL
see exactly what changed
GGala
POST /dev/url-clean$0.002
🌐 TranslationFree
Sort a list alphabetically
accents and numbers handled
GGala
POST /locale/sort$0.002
📈 SEOFree
Validate a redirect map
find loops and chains before launch
GGala
POST /seo/redirect-map-validate$0.002
✍️ Text & AIFree
Word counter
words, characters, sentences, free in your browser
AAspire
POST /text/word-count$0.002
⚙️ Developer UtilitiesFree
Date difference and age calculator
years, months and exact days
PPavilion
POST /dev/date-diff$0.002
⚙️ Developer UtilitiesFree
Regex tester
match and replace online, free in your browser
AAspire
POST /dev/regex-tester$0.002
✍️ Text & AIFree
Number to words
spell amounts in English and Spanish
PPavilion
POST /text/number-to-words$0.002
⚙️ Developer UtilitiesFree
Fraction calculator
simplify, add, multiply free in your browser
PPavilion
POST /dev/fraction-calculator$0.002
⚙️ Developer UtilitiesFree
Percentage calculator
free online in your browser
AAspire
POST /dev/percentage$0.002
⚙️ Developer UtilitiesFree
Base converter
binary hex free in browser
AAspire
POST /dev/number-base$0.002
⚙️ Developer UtilitiesFree
Roman numeral converter
free in your browser
AAspire
POST /dev/roman$0.002
⚙️ Developer UtilitiesFree
GCD LCM calculator
free in your browser
AAspire
POST /dev/gcd-lcm$0.002
⚙️ Developer UtilitiesFree
BMI calculator
free online in your browser
AAspire
POST /dev/bmi$0.002
⚙️ Developer UtilitiesFree
VAT calculator
add or extract tax free online
AAspire
POST /dev/vat-calculator$0.002
⚙️ Developer UtilitiesFree
Sleep calculator
bedtime by 90-min cycles free
AAspire
POST /dev/sleep-calculator$0.002
✍️ Text & AIFree
Case converter
camel snake title free in browser
AAspire
POST /text/case-convert$0.002
⚙️ Developer UtilitiesFree
TDEE & BMR calculator
Mifflin free online
AAspire
POST /dev/calorie-needs$0.002
⚙️ Developer UtilitiesFree
Grade calculator
weighted average free online
AAspire
POST /dev/grade-calculator$0.002
⚙️ Developer UtilitiesFree
Salary calculator
hourly to annual free online
AAspire
POST /dev/salary-calculator$0.002
✍️ Text & AIFree
NATO phonetic alphabet
encode and decode free in your browser
PPavilion
POST /text/nato-phonetic$0.002
✍️ Text & AIFree
Caesar cipher & ROT13
encode and decode free in your browser
PPavilion
POST /text/caesar-cipher$0.002
⚙️ Developer UtilitiesFree
Aspect ratio calculator
free online
AAspire
POST /dev/aspect-ratio$0.002
⚙️ Developer UtilitiesFree
CAGR calculator
compound annual growth free
AAspire
POST /dev/cagr$0.002
⚙️ Developer UtilitiesFree
Circle calculator
radius area free online
AAspire
POST /dev/circle$0.002
⚙️ Developer UtilitiesFree
Ohm's law calculator
V I R P free online
AAspire
POST /dev/ohm-law$0.002
⚙️ Developer UtilitiesFree
One rep max calculator
Epley Brzycki free
AAspire
POST /dev/one-rep-max$0.002
⚙️ Developer UtilitiesFree
Profit margin calculator
free online
AAspire
POST /dev/profit-margin$0.002
⚙️ Developer UtilitiesFree
Simple interest calculator
free online
AAspire
POST /dev/simple-interest$0.002
⚙️ Developer UtilitiesFree
Download time calculator
free online
AAspire
POST /dev/download-time$0.002
⚙️ Developer UtilitiesFree
Discount calculator
percent off and final price free in your browser
PPavilion
POST /dev/discount-calculator$0.002
⚙️ Developer UtilitiesFree
Time calculator
hours, minutes and seconds free in your browser
PPavilion
POST /dev/time-calculator$0.002
⚙️ Developer UtilitiesFree
Body fat calculator
US Navy free
AAspire
POST /dev/body-fat$0.002
⚙️ Developer UtilitiesFree
Break even calculator
free online
AAspire
POST /dev/break-even$0.002
⚙️ Developer UtilitiesFree
Cat age calculator
free online
AAspire
POST /dev/cat-age$0.002
⚙️ Developer UtilitiesFree
Dog age calculator
free online
AAspire
POST /dev/dog-age$0.002
⚙️ Developer UtilitiesFree
Due date calculator
free online
AAspire
POST /dev/due-date$0.002
⚙️ Developer UtilitiesFree
GPA calculator
free online
AAspire
POST /dev/gpa-calculator$0.002
⚙️ Developer UtilitiesFree
Heart rate zones
Karvonen free online
AAspire
POST /dev/heart-rate-zones$0.002
⚙️ Developer UtilitiesFree
Ideal weight calculator
free online
AAspire
POST /dev/ideal-weight$0.002
⚙️ Developer UtilitiesFree
Ovulation calculator
free online
AAspire
POST /dev/ovulation-calculator$0.002
⚙️ Developer UtilitiesFree
Speed distance time calculator
free
AAspire
POST /dev/speed-distance-time$0.002
⚙️ Developer UtilitiesFree
Water intake calculator
free online
AAspire
POST /dev/water-intake$0.002

How it works

1

Get your key

Create an account with your email and add balance when you need it. No subscription, no sales call.

2

Call the endpoint

One authenticated POST. The API returns a task_id immediately — copy-paste snippets in five languages on every page.

3

Collect the result

Receive a signed webhook the moment it's ready, or fetch a signed link. A failed task is never charged.

Pay only for what you use

No subscription. Free tools run in your browser; paid tasks draw from your balance, which never expires.

Free tools
$0.00

On-device utilities — hash, QR, JSON, Text→PDF and more — run in your browser. No account, no limits.

Balance
$10.00+

Top up your balance and spend it across web, API and the app. It never expires.