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Best 投递保证 APIs

Inbox Validation API

Communication & Messaging

The Inbox Validation API ensures accurate and deliverable email data, streamlining communication by verifying syntax, domains, and preventing common pitfalls.

Free 7-Day Trial

100% uptime 369ms avg MCP ready

Delivery Assurance API

Communication & Messaging

Delivery Assurance API: Improve communication integrity by verifying email addresses, ensuring syntax accuracy, deliverability and filtering out disposable or potentially harmful addresses.

100% uptime 75ms avg MCP ready

Communication Authenticator API

Communication & Messaging

"Communication Authenticator API: Ensure email accuracy effortlessly. Confirm deliverability, syntax, and domain validity for seamless communication. Simplify your verification process."

Free 7-Day Trial

100% uptime 153ms avg MCP ready

Deliverability Check API

Communication & Messaging

The Deliverability Check API ensures email accuracy by validating addresses. Its syntax, domain, and mailbox checks enhance deliverability and communication reliability.

Free 7-Day Trial

100% uptime 394ms avg MCP ready

Email Disposable Verification API

Security & Cybersecurity

The Email Disposable Verification API enhances data integrity and security by validating email addresses for accuracy and identifying disposable emails.

Free 7-Day Trial

100% uptime 254ms avg MCP ready

Inbox Assurance API

Communication & Messaging

The Inbox Assurance API verifies and enhances email accuracy by checking syntax, domain validity, and detecting disposable addresses for secure communication.

Free 7-Day Trial

100% uptime 433ms avg MCP ready

B2B Intelligence Deliverability and Anti-Bot API

Other

Query 55,000+ verified B2B leads, real-time DNS email deliverability verification, company tech stack intelligence, and anti-bot web-to-markdown extraction.

Free 7-Day Trial

100% uptime 319ms avg MCP ready

Disposable Email Check API

Finance & Payments

Validates whether an email address is temporary or disposable, returning true or false to facilitate automated filtering.

Free 7-Day Trial

100% uptime 559ms avg MCP ready

Guaranteed Currency Conversion API

Finance & Payments

The Guaranteed Currency Conversion API enhances various sectors, including e-commerce and financial services, by delivering precise real-time currency conversion features, simplifying international transactions effortlessly.

Free 7-Day Trial

100% uptime 186ms avg MCP ready

Global Email Validation and Deliverability API

Communication & Messaging

Validates email addresses for syntax, MX records, disposable domains, role-based addresses, and domain typos, then returns a weighted risk score and deliverability verdict. Supports single and batch validation.

Free 7-Day Trial

100% uptime 183ms avg MCP ready

Gumroad License Validation Backend API

Commerce & eCommerce

License validation backend for Gumroad and direct software sellers. Verify keys, enforce activation limits, and prevent key sharing without building custom infrastructure.

Free 7-Day Trial

100% uptime 113ms avg MCP ready

Cloud License Management License Verification and Activation API

Security & Cybersecurity

Simplify your licensing process with our Cloud License Management API for efficient license verification and activation.

Free 7-Day Trial

100% uptime 282ms avg MCP ready

Digital Product Security License Verification and Activation API

Security & Cybersecurity

Safeguard digital products with our Digital Product Security API for robust license verification and activation.

Free 7-Day Trial

100% uptime 314ms avg MCP ready

Dynamic Email Verification API

Communication & Messaging

The Dynamic Email Verification API enhances data accuracy by verifying email addresses in real-time, preventing bounce backs, and ensuring reliable communication channels.

Free 7-Day Trial

100% uptime 720ms avg MCP ready

Digital Product Passport API

Legal & Compliance

EU-Compliance: Digital Product Passport (DPP) Immutable QR Engine. Guaranteed 10-year URL persistence for Textile and Battery ESPR mandates (March 2026). High-error-correction QR generation optimized for industrial label printing. Frankfurt (EU-Central) data residency.

Free 7-Day Trial

100% uptime 524ms avg MCP ready

Reliable Authentic Email Validation API

Communication & Messaging

Ensure deliverability with our Reliable Authentic Email Validation API, designed to verify email addresses accurately and efficiently.

Free 7-Day Trial

100% uptime 532ms avg MCP ready

Authentic Email Verification API

Communication & Messaging

Ensure email deliverability with our Authentic Email Verification API, boosting your communication success.

Free 7-Day Trial

100% uptime 577ms avg MCP ready

Mail Assurance API

Communication & Messaging

Mail Assurance API Validates email addresses in real time, confirming the existence of the mailbox, ensuring accuracy and reliability in email delivery.

Free 7-Day Trial

100% uptime 797ms avg MCP ready

Email Reliability API

Communication & Messaging

The Email Reliability API ensures the accuracy and legitimacy of email addresses, offering a reliable solution for verifying and maintaining data integrity.

Free 7-Day Trial