Turn your data into a money-making API — the UK's x402 marketplace

Turn your data into a money-making API in 5 minutes.

Got specialist knowledge? Property records, legal precedents, medical codes, logistics data? AI agents need it. They'll pay you per lookup. Automatically.

No code required. We handle payments, hosting, and discovery. You keep 97%.

List your API — free · Explore the marketplace

x402 protocol — backed by Coinbase, Cloudflare. Moved to Linux Foundation.

10 Live APIs · 65 Endpoints · $4,000+ Monthly revenue · 97% Kept by providers

UK property data API, Companies House API, postcode lookup API, pay per request API, x402 marketplace, AI agent API marketplace, MCP API directory, USDC API payments, micropayment API

Why PayAPI vs enterprise data providers

Enterprise data providers charge $15,000 per year with annual contracts. PayAPI Market charges $0.002 per request with no commitment. That is 7,500,000 requests before you break even on the enterprise plan. AI agents cannot fill out forms, enter credit cards, or sign contracts. They need x402.

USDC on Base: sub-second settlement, less than $0.001 transaction fee. Zero support tickets needed.

How it works

1. List your API — Add your endpoint URL, set a price per request (from $0.001), write a description. Free, takes 5 minutes.
2. AI agents discover you — Your API appears in the Model Context Protocol registry. Claude Desktop, Cursor, LangChain agents, and any MCP-compatible client find you automatically.
3. Agents pay, you keep 97% — Every request triggers an x402 micropayment. USDC settles on Base in under a second. No invoicing, no chasing, no support needed.

Who is this for

You do not need to be a developer. You need domain expertise. Mortgage brokers, recruiters, accountants, estate agents, solicitors, logistics managers, compliance officers, insurance underwriters, pharmacists, and quantity surveyors can all monetise their specialist knowledge through APIs on PayAPI Market.

Live API listings

10 APIs at launch (April 2026), 65 endpoints total across property, weather, companies, vehicles, and finance domains:

• UK Data API — 24 endpoints. UK government and public data: Land Registry, EPC, Companies House, DVLA, BoE rates, weather, crime, flood risk. $0.001–0.002 per request.
• Email Verification API — 4 endpoints. SMTP check, disposable-domain filter, catch-all detection, role-account heuristics. $0.001 per request.
• Company Enrichment API — 6 endpoints. Companies House lookup plus directors, filings, SIC codes, financials. $0.003–0.005 per request.
• Postcode & Address Lookup — 5 endpoints. UK postcode to address, validation, autocomplete, geocoding. $0.001 per request.
• Currency & Crypto API — 5 endpoints. FX rates, crypto spot prices, historical series, conversion. $0.001 per request.
• Screenshot & PDF Capture — 4 endpoints. Headless browser page rendering, full-page screenshots, PDF export. $0.002 per request.
• DNS & Domain Intelligence — 5 endpoints. WHOIS, DNS A/AAAA/MX/TXT, SPF/DKIM, nameserver history. $0.002 per request.
• Web Scraper & Content Extractor — 4 endpoints. HTML to structured data, readability extraction, metadata. $0.002 per request.
• IP Geolocation API — 4 endpoints. IP to country, city, ASN, ISP, timezone. $0.001 per request.
• QR Code API — 4 endpoints. QR generation, decoding, styling, batch. $0.001 per request.

Pricing

Free to list. 3% platform fee, you keep 97%. Featured tier at $49/month with 2% fee, you keep 98%. No subscriptions for buyers — agents pay per request.

• List your API — free
• Explore the marketplace
• Estimate your revenue
• See pricing

The agent economy is here. Your knowledge should be earning.

10 APIs earning $4,000+ a month with zero hours of customer support. Yours could be next. List your API — free.