AgentKit x402: email, domain and Swedish data APIs
Pay-per-call utility API for agents (USDC on Base, x402 v2). 10 GET endpoints: email syntax/MX/disposable check ($0.002), SPF/DKIM/DMARC email-auth audit ($0.01), DNS-over-HTTPS records ($0.005), public contact details from a website ($0.02), one-page technical SEO audit ($0.02), URL to Markdown ($0.005), Swedish orgnr/personnummer/bankgiro/plusgiro validation ($0.001), IBAN validation ($0.001), Swedish clearing+account to IBAN ($0.002), Swedish bank-day calculator ($0.001). Honours robots.txt, no stored personal data, failed calls are not settled. OpenAPI at /openapi.json, MCP at /mcp, free static demos at /v1/demo/.
1 of 10 routes settlement-verified · $0.001–$0.02 USDC/request · 10 endpoints / 12 tools · Tools · base network · x402 protocol
Verified routes
GET /v1/email-auth· $0.01 · 2026-10-18 · receipt
Other routes are unverified.
Networks: Base (settlement-verified)
Discovery is free. Agents search the catalogue here. Payment happens on the listing 402, not on PayAPI.
url https://payapi.market/mcpAbout this API
AgentKit x402: email, domain and Swedish data APIs is listed in the Tools category with pricing at $0.001–$0.02 USDC/request. One route has been settlement-verified by PayAPI Market on 2026-10-18. View receipt on Basescan.
Payments settle on base in USDC via the x402 protocol. AI agents discover this API through the PayAPI Market MCP server and pay per request without API keys or accounts.
This API exposes 10 endpoints. Only the verified route has been tested by PayAPI Market. Other routes are unverified.
How to call this API
Every protected route returns HTTP 402 with x402 payment requirements. An agent pays the stated USDC amount on Base and retries with the payment header. No API keys, no accounts. Browse the marketplace or list your own API.
Related APIs
- Ops Control HQ DNS Lookup · 1 route verified · Pay-per-call public DNS record lookup via Google DNS-over-HTTPS. Returns A, AAAA, MX, TXT, NS, CNAME, SOA or CAA records, DNS status, answers, authority and check timestamp. No private-domain or credential access.
- zFinia Accessibility Contrast Calculator · 1 route verified · Calculate WCAG 2.x sRGB contrast for one caller-supplied colour pair; no interface-wide accessibility claim is made. POST {"foreground":"#000000","background":"#ffffff","large_text":false} on Base exact x402 at US$0.001. MCP is challenge-handoff, not a wallet.
- Wallet Risk Report · 1 route verified · Vet any wallet before you transact: sanctions, phishing and theft flags, risky token approvals, scam tokens held and full portfolio in USD across 6 EVM chains or Solana. One call.
- 402xAgent · 1 route verified · 402xAgent: verified catalog reliability lookup for x402 endpoints, a flat $0.02 USDC on Base per call with a signed receipt. Free check first: https://api.402xagent.com/v1/products/endpoint-spot-check (5 free a day).
- x402 MCP Tools · 1 route verified · Four pay-per-call MCP tools: QR code generator, image processing, LLM text analysis (summary/sentiment/keywords/translation), URL fetch. USDC on Base, x402 v2.
- Agent402.Tools · 1 route verified · Pay-per-call tools for agents. Prices and catalog size come from https://agent402.tools/api/pricing and can change.