A provably fair draw anyone can verify
Commit to a server seed before the draw, publish it after, and let any user reproduce the result themselves. The scheme, and the mistake that makes it worthless.
Reference library · 94 entries · 10 free tools
The parts every faucet is built from.
Payouts, cooldowns, reward tables, captcha checks, ledger maths, popunders, postbacks. The pieces every faucet and crypto micro-economy site needs, written out properly instead of half-answered on a forum. No signup, no timer, no shortlink between you and the code.
Start here
Idle mining accrual with a capacity cap
Earn while away, but only up to a ceiling — computed on read from a timestamp, so there is no cron and no per-user tick.
A withdrawal that cannot be paid twice
Debit on request, not on approval. The state machine that makes double payouts and phantom balances impossible.
A popunder that actually opens behind the page
The swap technique, plus the one line that stops the visitor's own click from cancelling it — the reason most popunder code silently loses the traffic it was supposed to send.
A claim cooldown the client cannot argue with
Reward the claim and start the next cooldown in one transaction, so a double-submitted form pays once instead of twice.
Send a FaucetPay payout with the v1 API
A minimal, correct call to FaucetPay's /api/v1/send endpoint, including the part almost everyone gets wrong: the amount is in the coin's smallest unit, not USD.
Tools & calculators — use them here, nothing to install
Satoshi and coin unit converter
Convert between satoshi, whole coins and USD for any coin, with the unit counts faucet APIs actually expect.
Faucet profitability calculator
Put in your traffic, claim rate and payout, and see whether the ad revenue covers what you are paying out.
Reward table designer
Set the prize tiers and weights, see the odds, the expected cost per claim and what the jackpot really costs you.
Cooldown and daily budget planner
Work backwards from a daily budget to a cooldown and reward that your faucet can actually sustain.
Crypto address validator
Check a wallet address before you pay it: base58check, bech32 and EIP-55 checksums for the coins faucets use.
Cron expression explainer
Paste a crontab line and get it in plain English, with the next few times it will actually run.
The index
TLS
Tools and Calculators
Converters, validators and calculators you can use here without copying anything.
0
FP
FaucetPay
Payouts, balance checks, merchant deposits and IPN verification against the FaucetPay API.
7
PAY
Payment Rails
Everything that moves coin that is not FaucetPay: node RPC, processors, address validation.
7
PRC
Price Feeds
Fetching, caching and sanity-checking coin prices before you pay anyone with them.
4
FCT
Faucet Mechanics
Claims, cooldowns, reward tables, mining accrual and the maths that keeps a faucet solvent.
5
FRD
Anti-Bot and Fraud
Captchas, rate limits, proxy detection, multi-account clustering and proof-of-render.
10
ADS
Ads, Traffic and Offerwalls
Banner serving, popunders, shortlink APIs, PTC runners and postback handling.
11
SEC
Auth and Security
Password handling, sessions, CSRF, 2FA, headers and safe outbound requests.
8
REF
Referrals
Codes, attribution windows, commission models and filtering out fake referrals.
4
LDG
Money and Ledger
Integer balances, double-entry ledgers, atomic transfers and reconciliation.
5
OPS
Admin and Operations
Settings, migrations, cron on shared hosting, backups and read-only demo mode.
7
STA
Stats and Reporting
Date-series queries, dependency-free SVG charts and traffic source reporting.
6
SEO
SEO and Frontend
Head tags, sitemaps, clean URLs and the plumbing search engines expect.
6
NTF
Notifications
Transactional mail, Telegram and Discord alerts, and anomaly warnings.
4
ENG
Engagement and Content
Leaderboards, achievements, contests, provably fair draws and announcements.
6
LEG
Legal and Compliance
Policy scaffolds, cookie consent, data export and country blocking.
4
Recently added
Run a contest without paying the prize twice
Snapshot the standings, pay from the snapshot, mark the contest closed — all in one transaction, with the entry rules decided before it opens.
A shoutbox that does not become a spam channel
Rate limited, length capped, link stripped, moderatable, and cheap to poll. The five constraints that keep a chat box usable.
A daily task list that resets cleanly
Generate the day's tasks once, track progress against a date key, and pay the completion bonus exactly once — no midnight cron required.
Achievements that reward the behaviour you want
A table of conditions, a checker that runs after activity, and a unique key so an achievement can only be awarded once.
A provably fair draw anyone can verify
Commit to a server seed before the draw, publish it after, and let any user reproduce the result themselves. The scheme, and the mistake that makes it worthless.
Block countries you are not allowed to serve
GeoIP at the edge or in PHP, applied to earning and signup rather than to content, with a message that says what happened.
Let a user export or delete their own data
Export as JSON, delete as anonymise-and-keep-the-ledger — because financial records have to survive a deletion request.
A cookie notice that is honest about what you set
No third-party consent script. A dismissible banner, a stored choice, and ad code that only loads once consent exists.