Doormat Capital

Small, working software.
Paid by the call.

Data APIs and checkers from 0.02 USDC each, a finished custom build from 150 USDC. No subscriptions, no accounts — everything below is live right now, try it before you pay anything.

14 products live · from 0 USDC/call · USDC on Base, no signup

Try it now

Real products, live this minute. Free tier works standalone; paying unlocks the deeper answer.

signals

Lighter perpetuals funding & volume snapshot, plus a wallet safety check — scam-airdrop lure tokens flagged, full 5-chain balance breakdown.

Free preview at / · Paid — /funding 0.02 USDC (intro through 17 Oct, then 0.05), /wallet-scan?address=0x... 0.05 USDC (intro through 17 Oct, then 0.20)

curl https://signals.sebastiaan-ba3.workers.dev/

payverify

Verify any Base USDC transaction — and get a flat-fee trade-verification certificate before you trust a P2P/OTC counterparty.

Free — /verify?tx=0x... (also a real MCP server at /mcp, for agents) · Paid — /statement?address=0x... 0.05 USDC (intro through 17 Oct, then 0.15) — a counterparty's recent USDC transfer history, flat fee, well under the ~0.5-1% a P2P escrow bot charges

curl "https://payverify.sebastiaan-ba3.workers.dev/verify?tx=0x7335880c605f68eb34a8cf873593b573bdec43f1e9fe858823210f56ea207845"

x402lint

Checks whether a paid API's 402 response actually speaks the x402 protocol correctly — and now tests live whether it can be tricked into giving itself away for free.

Free — /lint?url=... · Paid — /deep-lint?url=... from 0.01 USDC (intro through 17 Oct, then 0.03); /conform?url=... 0.05 USDC — live adversarial test against garbage/fake payment proofs

curl "https://x402lint.sebastiaan-ba3.workers.dev/lint?url=https://api.github.com"

More free tools

Small, focused checkers. Each one is free to use right now; a paid call adds the deeper report.

Security & verification

mailcheck SPF / DKIM / DMARC checker for your own domain's email. 0.02 USDC for the DKIM probe + fix snippets secheaders HTTP security header checker (HSTS, CSP, and more). 0.02 USDC for cookie audit + fix snippets jwtcheck Decode a JWT and read its claims. 0.02 USDC to verify the signature corscheck Tests a URL's real CORS headers against an origin you give it. 0.02 USDC for a multi-origin security report crawlercheck Which of ~20 named AI crawlers your robots.txt allows or blocks. 0.03 USDC for the full report + snippet

Dev utilities

hookbin Disposable webhook inbox — watch what actually gets POSTed to a URL. 0.05 USDC to extend a bin to 200 requests / 24h llmstxt-check Validates a site's llms.txt against the spec. 0.03 USDC to draft one from your homepage metacheck SEO and social-preview meta tag checker. 0.02 USDC for fix snippets + preview cards cronparse Explains a cron expression in plain English and shows next runs. 0.02 USDC to convert timezones + platform quirks

Crypto safety

apecheck Checks contract ownership and mint-function red flags on a Base token in 60 seconds — not a liquidity or holder-concentration check. 1.00 USDC for the full report (metadata, owner, activity)

AI visibility

aivisibility Checks llms.txt validity, AI-crawler robots.txt access, and OG/meta tag completeness in one report. 2 USDC one-time for every finding across all three checks

Need your words fixed, not an API

We also rewrite landing pages, READMEs and video scripts — and send you the finished piece before you pay anything. See real examples & pricing →

Need something built for you

A live JSON API on its own URL, a Telegram bot watching conditions you set, or both wired together — built to your own stack, delivered in 2-4 days.

Data API

150 USDC / 140 EUR

One live JSON endpoint pulling from one exchange or on-chain source you name. 2 days from deposit.

Monitoring bot

300 USDC / 280 EUR

A Telegram bot watching up to 3 conditions you define, with a /status command. 3 days from deposit.

Full integration

500 USDC / 460 EUR

Both combined, source handed over, 7 days of us keeping it running free. 4 days from deposit.

Straightforward pricing, no hidden fees: quote first, work after a confirmed deposit (50% to start, 50% on delivery). Tell us what you need on Telegram or by email and we'll confirm scope and price before anything is paid.

Launching a token or contract?

An automated pre-launch scan: known Solidity bug patterns plus a check for owner-privilege rug levers (mint, burn, pause, sweep, vesting overrides). The same kind of check sold as a "smart contract audit" for $150-500 elsewhere — ours is automated-only, says so plainly, and costs a lot less. This is for your own use before you launch, not a certification — please don't present it to your community as an audit.

Pre-Launch Contract Scan

29 USDC / 27 EUR

Send your contract address (Base, verified source) or the raw Solidity file, plus payment. We run static analysis and a centralization/rug-pattern scan and send back a plain-English report, same day. Not a manual line-by-line audit and not a guarantee — the report says exactly what it did and didn't check.

See a real sample report →

Order by email or Telegram: tell us which contract, send the USDC on Base with the tx hash, and we'll have the report back to you the same day.

How payment works

Crypto (preferred): USDC on Base to 0x202B73254C28fA012BD11ff50425D94534b95594. For the pay-per-call products, send once then call again with header X-PAYMENT-TX: <your tx hash> — each product's own page spells out the exact step. For a custom build, send the deposit and reply with the tx hash on Telegram or email.

Bank transfer (only if crypto genuinely isn't an option for you): ask us for our IBAN — Kairon BV, confirmed by hand once the transfer lands.

Stay in the loop

New tools ship most days. Leave your email and we'll send the ones worth knowing about — no spam, unsubscribe any time by replying.

Talk to us

Email: fleur.doormatcapital@gmail.com

Telegram: https://t.me/doormatcapitalbot

Wallet (USDC on Base): 0x202B73254C28fA012BD11ff50425D94534b95594