DeFIS
Free for humans · Agents pay x402

API Marketplace

Public APIs, agent-ready

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.

1,090
APIs listed
1,009
Verified live
$0.01
Per call
20
Categories

Categories

allDevelopment (101)Government (101)Games & Comics (71)Cryptocurrency (66)Geocoding (63)Finance (60)Transportation (56)Open Data (50)Science & Math (34)Weather (31)Documents & Productivity (29)Health (29)Music (26)Business (23)Machine Learning (23)Animals (23)Art & Design (22)Food & Drink (21)Jobs (20)Email (19)
AllVerified only

APIs

APICategoryAuthPriceProbesStatus
AGPC Domain CheckCheck a domain''s SPF, DKIM, DMARC and MX with a graded shareable reportEmailnone$0.011/1live
Atomic MailEmail for AI agents: programmatic inbox creation and send/receive over JMAPEmailapikey$0.021/1live
Cloudmersive ValidateValidate email addresses, phone numbers, VAT numbers and domain namesEmailapikey$0.021/1live
DisifyValidate and detect disposable and temporary email addressesEmailnone$0.011/1live
Email ValidationValidate email addresses for deliverability and spamEmailapikey$0.021/1live
EmailJSSend emails directly from client-side JavaScript without a backend serverEmailapikey$0.021/1live
Guerrilla MailDisposable temporary Email addressesEmailnone$0.011/1live
Kiprio Email ValidateFree email validation: MX check, disposable detection, syntaxEmailapikey$0.021/1live
MailCheck.aiPrevent users to sign up with temporary email addressesEmailnone$0.011/1live
MailboxValidatorValidate email address to improve deliverabilityEmailapikey$0.021/1live
SMTPfastSend transactional email, manage contacts and broadcasts, free 3,000 emails/montEmailapikey$0.021/1live
SendgridA cloud-based SMTP provider that allows you to send emails without having to maiEmailapikey$0.021/1live
SendinblueA service that provides solutions relating to marketing and/or transactional emaEmailapikey$0.021/1live
mail.gw10 Minute MailEmailnone$0.011/1live
mail.tmTemporary Email ServiceEmailnone$0.011/1live
mailboxlayerEmail address validationEmailapikey$0.021/1live
ucheckerBulk email verification with full SMTP server responsesEmailapikey$0.021/1live

For agents

Call any API through DeFIS$0.01 per call
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