Sanctions compliance
How to Check if a Crypto Wallet Address Is Sanctioned (OFAC SDN)
What "OFAC sanctioned" means for a wallet, where the official data lives, and the pitfalls that produce false confidence.
Read the guide →In-depth, source-cited
Guides
Practical walkthroughs of OFAC sanctions screening, SEC EDGAR filings, and U.S. Treasury debt data. Each guide cites the primary source and points to a matching free tool and an option for repeat work.
Building an AI agent? Skip straight to copy-paste integration code — TypeScript, Python, Vercel AI SDK, LangChain, MCP, CrewAI.
Prefer card billing over a crypto wallet? Subscribe on RapidAPI — the same sanctions/EDGAR/Treasury endpoints, billed by RapidAPI instead of USDC.
All guides
SEC filings
What Each SEC Form 8-K Item Means (With Examples)
Every current 8-K item, section by section, in plain English, with a real-world example for each.
Read the guide →SEC filings
How to Find a Company's CIK and Pull Its SEC Filings
What a CIK is, three ways to find one, and a worked example from ticker to filings to structured XBRL facts.
Read the guide →Sanctions compliance
Tracking OFAC Sanctions List Changes: Where the Official Data Lives
Why a one-off screen isn't enough, the official change-tracking sources, and a practical monitoring workflow.
Read the guide →SEC filings · Private markets
How to Read SEC Form D Private Offering Filings
What a Form D actually discloses about a private raise, what it deliberately leaves out, and how to search it by issuer.
Read the guide →OFAC names
OFAC SDN Name Screening: Free Check and Local Python CLI
Run a first-pass name check, review possible matches against official records, and repeat the work locally.
Read the guide →Treasury data
US Treasury Debt Snapshot: Free Data Check and Local CLI
Read the correct debt series and date, check the free snapshot, and keep a repeatable local record.
Read the guide →SEC XBRL data
SEC EDGAR Company Facts API: XBRL by Ticker or CIK
Choose a concept, unit, period and filing date before comparing company financial facts.
Read the guide →Trending topics
Trending Topics API & Social Media Trends API
A free live check of what's trending right now, then the two paid routes behind it — merged multi-source and single-topic Wikipedia attention data.
Read the guide →Wallet risk
Wallet Risk Check API (Base)
Check a Base wallet's activity, balances, and OFAC sanctions status before you trust it as a counterparty.
Read the guide →Domain identity
Domain Age / WHOIS RDAP API
RDAP registration data plus live SPF/DMARC/MX posture for any domain, before you trust an email or a link.
Read the guide →KYB / due diligence
KYB Check API — Company Due Diligence in One Call
Merge company identity, sanctions screening, domain posture, wallet risk, and email deliverability into one report instead of five separate calls.
Read the guide →Building an x402 seller
Lessons From Shipping 40 Paid x402 Endpoints
Real pitfalls from running a live x402 seller: settle-only-after-success, a 5-tag schema limit, placeholder Bazaar schemas, a deploy break, and crawler bots.
Read the guide →x402 for buyers
How AI Agents Discover and Pay for APIs With x402
A buyer-side walkthrough of the x402 payment flow, with verified TypeScript and Python code using the official client packages.
Read the guide →MCP + payment
Adding Pay-Per-Call to an MCP Server
MCP has no built-in payment channel. The honest pattern that works today: bridge a paid tool to a real x402 HTTP route.
Read the guide →Need a local tool for repeated work?
These downloadable CLIs use bundled sample data offline and offer optional public-source refreshes. Each is $9 pay-what-you-want ($5 minimum). Check the product page for the current download and checkout terms.
OFAC names
ofac-screen
Scriptable first-pass SDN name screening. For wallet-address checks, use the live OFAC free tool or paid API.
See the local name screener →SEC identifiers
edgar-cik
Resolve company names, tickers, and CIKs locally for scripts and batch jobs. It does not search Form D filings.
See the CIK resolver →SEC 8-K
edgar-8k-watch
Filter SEC 8-K entries by Item code, keyword, or event pack, with an offline sample and optional fetch.
See the 8-K CLI →SEC XBRL facts
edgar-company-facts-cli
Print Assets, Revenue, Net Income, and EPS by ticker or CIK as text, JSON, or CSV, with an offline sample and optional live SEC fetch. Pairs with the Company Facts guide.
See the company facts CLI →US Treasury
treasury-watch
Scriptable local US debt and interest snapshot with an optional Fiscal Data refresh. Pairs with the Treasury debt guide.
See the Treasury CLI →SEC late filings
sec-late-filings
Turn an SEC-style CSV or JSON export into a ranked late-filing exception list that separates still-late filings from resolved ones and counts days late, with a bundled sample and JSON for repeat reviews. Confirm status on sec.gov.
See the late-filings CLI →FDA action dates
pdufa-calendar
Filter FDA PDUFA action dates locally, with a bundled sample, optional public-data refresh, and JSON for scripts and calendars. Confirm dates against official sources.
See the PDUFA CLI →For a broader offline workflow, the $29 OFAC Wallet Screening Kit checks OFAC-published crypto addresses, while the $19 SEC EDGAR Starter Kit combines CIK lookup, filings, 8-K Item extraction, and XBRL facts to CSV.
How each guide is built
Every guide cites its primary source directly — OFAC, SEC, or Treasury — and links to a matching free, no-signup tool. The guides also show the available local CLI or API path for repeat work.
These guides are informational, not legal, compliance, or investment advice — see the disclaimer at the bottom of each one. Full free-tool index: /tools/index.html. Full paid catalog: /shop.