and runs during HTML parse, but hubspotutk is set by js.hs-analytics.net, measured loading at ~834ms. On a first visit the cookie does not exist yet, so a single read returns nothing and the visitor gets no external ID at all — and a first visit is exactly what an ad click is. So poll briefly until HubSpot sets it. The SDK loads lazily (~4.5s) and replays a queue, so an init queued a second or two in still lands before any events are transmitted. */ (function attachExternalId() { var attempts = 0; var MAX_ATTEMPTS = 40; /* 40 x 200ms = 8s, then give up quietly */ var timer = null; function tryAttach() { var raw = getExternalId(); if (!raw) { if (++attempts >= MAX_ATTEMPTS && timer) clearInterval(timer); return; } if (timer) clearInterval(timer); sha256Hex(raw).then(function (hash) { oaiq("init", { user: { external_id_sha256: hash } }); }).catch(function () {}); } tryAttach(); /* returning visitor: immediate */ if (!getExternalId()) timer = setInterval(tryAttach, 200); })(); /* --------------------------------------------------------------------------- 2. Load the SDK off the critical path Whichever comes first: the main thread going idle after load, or the first sign of real user intent. No preconnect on purpose — a TLS handshake during LCP for a script we deliberately deferred is a net loss. Measured on clickpost.ai: load event 3614ms, SDK fetched 4508ms. ------------------------------------------------------------------------ */ var loaded = false; var INTENT = ["pointerdown", "keydown", "scroll"]; function loadSdk() { if (loaded) return; loaded = true; INTENT.forEach(function (t) { removeEventListener(t, loadSdk, { passive: true }); }); var s = document.createElement("script"); s.src = SDK; s.async = true; s.fetchPriority = "low"; document.head.appendChild(s); } INTENT.forEach(function (t) { addEventListener(t, loadSdk, { passive: true, once: true }); }); addEventListener("load", function () { window.requestIdleCallback ? requestIdleCallback(loadSdk, { timeout: 2500 }) : setTimeout(loadSdk, 1500); }, { once: true }); /* --------------------------------------------------------------------------- 3. Conversion id sha256(lowercase(email) + "|" + formId + "|" + ISO-hour), first 20 hex, "lead_" prefix. - email lowercased/trimmed so casing does not fork the id - formId keeps two different forms in the same hour from colliding - the hour bucket is only the server's fallback; the id computed here is sent to the relay verbatim, so the two paths cannot disagree even when a submit straddles an hour boundary Ads Manager's own sample omits event_id. We send it so the pixel event and the relay event collapse into one conversion instead of counting twice. ------------------------------------------------------------------------ */ function buildEventId(email, formId) { var seed = [ String(email || "").trim().toLowerCase(), String(formId || ""), new Date().toISOString().slice(0, 13) ].join("|"); return crypto.subtle.digest("SHA-256", new TextEncoder().encode(seed)).then(function (buf) { var hex = Array.prototype.map.call(new Uint8Array(buf), function (b) { return b.toString(16).padStart(2, "0"); }).join(""); return "lead_" + hex.slice(0, 20); }); } /* Guards a re-fire from the history.pushState that book-a-demo-core.js runs after submit, and from back-navigation onto the same state. */ function firedOnce(id) { try { if (sessionStorage.getItem("oaiq_" + id)) return true; sessionStorage.setItem("oaiq_" + id, "1"); return false; } catch (e) { return false; /* private mode / blocked storage: fire rather than lose it */ } } /* Path 2. keepalive lets the request finish even if the page navigates away. Failures are swallowed deliberately: a reporting call must never surface an error to someone who just submitted a form. The relay hashes the email server-side into user.emails_sha256 and adds the caller's IP and user agent, so this event carries the same match signals the pixel gets for free. */ function sendToRelay(email, formId, eventType, eventId) { try { var payload = { token: RELAY_TOKEN, email: email, form_id: formId || "", event_type: eventType, event_id: eventId, /* verbatim, so both paths always match */ source_url: location.href }; var oppref = getOppref(); if (oppref) payload.oppref = oppref; var externalId = getExternalId(); if (externalId) payload.external_id = externalId; fetch(RELAY_URL, { method: "POST", keepalive: true, headers: { "Content-Type": "application/json" }, body: JSON.stringify(payload) }).catch(function () {}); } catch (e) {} } /* Capture the email while the form is still on the page. onFormSubmitted does not reliably carry submissionValues, and by then the form may be removed. */ var lastEmail = ""; document.addEventListener("submit", function (e) { var f = e.target; if (!f || !f.querySelector) return; var i = f.querySelector('input[name="email"], input[type="email"]'); if (i && i.value) lastEmail = i.value; }, true); /* Every HubSpot form on the site reports through this one message event, so no module or theme JS needs editing to add coverage. */ window.addEventListener("message", function (e) { var d = e.data; if (!d || d.type !== "hsFormCallback" || d.eventName !== "onFormSubmitted") return; var email = (d.data && d.data.submissionValues && d.data.submissionValues.email) || lastEmail; if (!email) return; /* without an email there is no stable id to dedupe on */ var eventType = EVENT_BY_FORM[d.id] || EVENT_DEFAULT; buildEventId(email, d.id).then(function (id) { if (firedOnce(id)) return; oaiq("measure", eventType, { type: DATA_TYPE }, { event_id: id }); /* path 1 */ sendToRelay(email, d.id, eventType, id); /* path 2 */ }); }); })();

91ÊÓƵ

See where your logistics stands on automation Start assessment

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Intelligence
Parth - AI Voice Agents COD order confirmations, NDR recovery AI Carrier Allocation 200B+ data points evaluate the best carrier per order. Apex Identifies and acts on exceptions Ally Agentic support for all channels
D2C Shipping
Multi-Carrier Integrations Branded Tracking Returns & Exchanges Failed Delivery Management Delivery Date Estimates Order Editing Notifications
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Header Feature Festive Readiness Hub Everything you need to hold delivery promises through peak season. Get ready
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ROI Calculator (1) NDR ROI Calculator See what a 40% RTO cut is worth on your monthly volume. Run the numbers
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RTO Playbook (1) 90-Day RTO Reduction Playbook Go from diagnosis to a 25% cut in RTO in 90 days. Get the playbook
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USPS Tracking and API Integration with ClickPost

Automate 90% of NDRs, cut WISMO queries by 76%, and improve operational efficiency by 30%. USPS delivers more with ClickPost.

USPS-Integration

Trusted by 450+ global brands

USPS-Clickpost

Benefits of Connecting with USPS through ClickPost

Deliver orders more efficiently across domestic and international routes with USPS, powered by ClickPost's automation layer.

  • Automate 90% of your NDRs to maximize USPS delivery success rates and reduce the operational load on your logistics team.
  • Achieve a 76% decrease in WISMO queries with ClickPost's automation services, keeping customers proactively informed at every delivery stage.
  • Improve operational efficiency by 30% with end-to-end shipping automation that eliminates manual steps from dispatch to delivery.

Check the integration library

Partner ID Order Creation Cancellation Tracking via Polling Tracking via Webhook Proof of Delivery (POD) Non Delivery Report (NDR) Create Pickup Request AWB Generation Flow Label Generation Country
USPS-logo
USPS
5 ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ India
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How to Track USPS Packages

Track USPS Packages with the ClickPost Tracking Page

  • Find your USPS tracking number from your order confirmation or shipping notification.
  • Open the ClickPost Tracking Page for your brand.
  • Paste the tracking number into the search field.
  • Click Track to view live shipment status, expected delivery date, and milestones.

Track USPS Packages on the USPS Official Page

  • Go to the official USPS website.
  • Locate the tracking tool on the homepage.
  • Enter your USPS tracking number in the search field.
  • Click the tracking icon to view real-time shipment updates and delivery details.

List of USPS APIs

API Description
Manifestation and Label Generation API Automate USPS order manifestation and generate shipping labels instantly, no manual intervention required at dispatch.
Track Shipment API Pull real-time USPS tracking updates and keep customers informed at every delivery stage via a unified ClickPost dashboard.
Cancellation API Cancel USPS shipments on demand via ClickPost whenever an order needs to be stopped or modified, no manual carrier requests needed.
EDD API Display accurate USPS delivery timelines on product and checkout pages to set clear customer expectations and reduce inbound queries
NDR Action Update Monitor all USPS non-delivery cases from a single dashboard, act quickly on failures, and push corrected instructions back to the carrier.
Return Webhooks Allow customers to initiate USPS returns seamlessly using integrated webhooks that trigger automated reverse logistics workflows.
API & Description
Manifestation and Label Generation API
Automate USPS order manifestation and generate shipping labels instantly, no manual intervention required at dispatch.
Track Shipment API
Pull real-time USPS tracking updates and keep customers informed at every delivery stage via a unified ClickPost dashboard.
Cancellation API
Cancel USPS shipments on demand via ClickPost whenever an order needs to be stopped or modified, no manual carrier requests needed.
EDD API
Display accurate USPS delivery timelines on product and checkout pages to set clear customer expectations and reduce inbound queries
NDR Action Update
Monitor all USPS non-delivery cases from a single dashboard, act quickly on failures, and push corrected instructions back to the carrier.
Return Webhooks
Allow customers to initiate USPS returns seamlessly using integrated webhooks that trigger automated reverse logistics workflows.

Frequently asked questions

Everything you need to know about ClickPost’s Carriers Integration

How does ClickPost use AI for Carrier Allocation?

ClickPost uses AI-driven algorithms to analyze multiple factors, such as cost, turnaround times, SLA Adherence for carriers, to recommend the best carrier for each shipment.

How does ClickPost use AI for Carrier Allocation?

ClickPost uses AI-driven algorithms to analyze multiple factors, such as cost, turnaround times, SLA Adherence for carriers, to recommend the best carrier for each shipment.

How does ClickPost use AI for Carrier Allocation?

ClickPost uses AI-driven algorithms to analyze multiple factors, such as cost, turnaround times, SLA Adherence for carriers, to recommend the best carrier for each shipment.

How does ClickPost use AI for Carrier Allocation?

ClickPost uses AI-driven algorithms to analyze multiple factors, such as cost, turnaround times, SLA Adherence for carriers, to recommend the best carrier for each shipment.

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Frequently asked questions (FAQ's)

What is USPS, and what shipping services does it offer?

USPS (United States Postal Service) is the official postal carrier of the United States, offering domestic and international delivery services including Priority Mail Express, Military and Diplomatic Mail, and reverse logistics. It is widely used by e-commerce brands for cost-effective last-mile delivery across the US.

How do I track a USPS shipment?

Enter your USPS tracking number on the USPS website to view real-time delivery updates. For a branded experience with milestones and EDD, use ClickPost's unified tracking page linked to your store.

Does USPS support international and military mail delivery?

Yes. USPS offers Priority Mail Express International and dedicated Military and Diplomatic Mail services. Through ClickPost, these service lines are tracked and managed from a single platform with automated status updates.

How does ClickPost integrate with USPS?

ClickPost integrates with USPS via API for order creation, label generation, real-time tracking, NDR management, cancellations, and return webhooks. All shipment data syncs automatically once the integration is active.

How does ClickPost handle USPS delivery exceptions and delays?

ClickPost monitors every USPS shipment in real time and flags exceptions,, delays, stuck shipments, and failed scans, before they escalate. Automated alerts notify your team instantly, enabling proactive resolution and strong SLA adherence.

How does ClickPost automate NDR management for USPS shipments?

ClickPost centralises all USPS NDR cases in one dashboard, automatically contacts customers via WhatsApp or SMS to resolve failed deliveries, and pushes corrected instructions back to USPS, automating 90% of NDRs without manual effort.

Streamline your shipping experience with ClickPost

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. window.disableHubSpotCookieBanner = true; function killNative() { var n = document.getElementById("hs-eu-cookie-confirmation"); if (n && n.parentNode) { n.parentNode.removeChild(n); return true; } return false; } killNative(); if (window.MutationObserver) { var mo = new MutationObserver(function () { killNative(); }); mo.observe(document.documentElement, { childList: true, subtree: true }); setTimeout(function () { mo.disconnect(); }, 15000); } var COOKIE = "cp_cookie_consent"; var EU = ["at","be","bg","hr","cy","cz","dk","ee","fi","fr","de","gr","hu","ie","it","lv","lt","lu","mt","nl","pl","pt","ro","sk","si","es","se","gb","uk","is","li","no","ch"]; function readCookie(nm) { var m = document.cookie.match(new RegExp("(?:^|; )" + nm + "=([^;]*)")); return m ? decodeURIComponent(m[1]) : null; } function writeCookie(nm, val, days) { var d = new Date(); d.setTime(d.getTime() + (days * 864e5)); document.cookie = nm + "=" + encodeURIComponent(val) + ";expires=" + d.toUTCString() + ";path=/;SameSite=Lax" + (location.protocol === "https:" ? 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"false" : "true"); }); }); banner.addEventListener("click", function (e) { if (!e.target || !e.target.closest) return; var btn = e.target.closest("[data-cpcb-action]"); if (!btn) return; var action = btn.getAttribute("data-cpcb-action"); if (action === "customise") { expand(); return; } if (action === "accept") { commit({ analytics: true, advertisement: true, functionality: true }, false); return; } if (action === "reject") { commit({ analytics: false, advertisement: false, functionality: false }, true); return; } if (action === "save") { commit(fromToggles(), true); return; } }); var existing = stored(); if (existing) { apply(existing, false); paint(existing); collapse(); } else if (!inScope(banner)) { // Out of the consent-required region: implied consent, banner never shown. commitSilently(); } else { collapse(); show(); } function commitSilently() { var all = { analytics: true, advertisement: true, functionality: true }; writeCookie(COOKIE, JSON.stringify({ analytics: true, advertisement: true, functionality: true, v: 1, ts: Date.now(), implied: true }), days); apply(all, false); } // Public re-open hook for a footer "Cookie settings" link. window.cpCookieBanner = window.cpCookieBanner || {}; window.cpCookieBanner.open = function () { var s = stored() || { analytics: false, advertisement: false, functionality: false }; paint(s); expand(); show(); }; } function boot() { var banners = document.querySelectorAll("[data-cpcb]"); if (!banners.length) return; init(banners[0]); document.addEventListener("click", function (e) { if (!e.target || !e.target.closest) return; var trigger = e.target.closest("[data-cp-cookie-settings]"); if (!trigger) return; e.preventDefault(); if (window.cpCookieBanner && window.cpCookieBanner.open) window.cpCookieBanner.open(); }); } if (document.readyState === "loading") { document.addEventListener("DOMContentLoaded", boot); } else { boot(); } })();