API Marketplace
Curated public APIs — finance, news, weather, crypto and more — callable through one x402 payment. No API keys, no signups: pay $0.01, get data. Every call is also a live probe.
| API | Category | Auth | Price | Probes | Status |
|---|---|---|---|---|---|
| AGPC Domain CheckCheck a domain''s SPF, DKIM, DMARC and MX with a graded shareable report | none | $0.01 | 1/1 | live | |
| Atomic MailEmail for AI agents: programmatic inbox creation and send/receive over JMAP | apikey | $0.02 | 1/1 | live | |
| Cloudmersive ValidateValidate email addresses, phone numbers, VAT numbers and domain names | apikey | $0.02 | 1/1 | live | |
| DisifyValidate and detect disposable and temporary email addresses | none | $0.01 | 1/1 | live | |
| Email ValidationValidate email addresses for deliverability and spam | apikey | $0.02 | 1/1 | live | |
| EmailJSSend emails directly from client-side JavaScript without a backend server | apikey | $0.02 | 1/1 | live | |
| Guerrilla MailDisposable temporary Email addresses | none | $0.01 | 1/1 | live | |
| Kiprio Email ValidateFree email validation: MX check, disposable detection, syntax | apikey | $0.02 | 1/1 | live | |
| MailCheck.aiPrevent users to sign up with temporary email addresses | none | $0.01 | 1/1 | live | |
| MailboxValidatorValidate email address to improve deliverability | apikey | $0.02 | 1/1 | live | |
| SMTPfastSend transactional email, manage contacts and broadcasts, free 3,000 emails/mont | apikey | $0.02 | 1/1 | live | |
| SendgridA cloud-based SMTP provider that allows you to send emails without having to mai | apikey | $0.02 | 1/1 | live | |
| SendinblueA service that provides solutions relating to marketing and/or transactional ema | apikey | $0.02 | 1/1 | live | |
| mail.gw10 Minute Mail | none | $0.01 | 1/1 | live | |
| mail.tmTemporary Email Service | none | $0.01 | 1/1 | live | |
| mailboxlayerEmail address validation | apikey | $0.02 | 1/1 | live | |
| ucheckerBulk email verification with full SMTP server responses | apikey | $0.02 | 1/1 | live | |
| EVAValidate email addresses | none | $0.01 | 0/1 | down | |
| VerifierVerifies that a given email is real | apikey | $0.02 | 0/1 | down |
GET /api/market # catalog (free) GET /api/market/<id>/call?path=/v1/endpoint&foo=bar # 402 → pay $0.01 USDC/USDT → retry # x-payment-tx: BASE:<txHash> # x-agent-wallet: <yourWallet> → first 3 calls free # x-ref: <referrerWallet> → they earn 5%, you pay same