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USPS Stamps.com

Alert

USPS Stamps.com requires accurate package dimensions and weight. Incorrect information may result in additional charges or delivery delays.

Requirements​

  • Stamps.com Account
  • USPS Account
  • Valid Business Address
  • Business Phone Number
  • Tax ID/EIN
  • Credit Card or ACH Payment Method
  • Insurance Documentation (if applicable)

Integration Steps​

Details
Step 1: Create Account
  1. Contact Stamps.com sales team
  2. Complete business application
  3. Set up payment method
  4. Verify USPS account status
  5. Receive account credentials

Contact Stamps.com

Details
Step 2: Get API Access
  1. Request API credentials
  2. Complete API agreement
  3. Receive authentication details
  4. Configure API endpoints
  5. Test API connection
Details
Step 3: Connect to Piyovi
  1. Open Piyovi dashboard
  2. Go to Settings → Carriers → Add New
  3. Choose USPS Stamps.com integration
  4. Enter Stamps.com credentials
  5. Test the connection

Services​

ServiceDelivery TimeDescriptionCoverage
First-Class Mail1-3 business daysLetters and small packagesDomestic
Priority Mail1-3 business daysPackages up to 70 lbsDomestic/International
Priority Express1-2 business daysOvernight to 2-dayDomestic/International
Media Mail2-8 business daysBooks and mediaDomestic

Support & Contact​

Support TypeAvailabilityContact Details
Customer Service24/7 Support1-888-434-0055
Technical SupportBusiness Hourssupport@stamps.com
Customer Portal24/7 AccessMyStamps

Common Errors​

Error CodeDescriptionSolution
Auth ErrorInvalid credentialsVerify API key/token
Address ErrorInvalid addressVerify address format
Rate ErrorWeight/size mismatchVerify package details

Service Limitations​

CategoryLimitationDetails
Weight Minimum0.1 ozPer piece
Weight Maximum70 lbsPer piece
Length Maximum108 inchesLength + girth
Combined Maximum130 inchesLength + girth
ProhibitedHazardous MaterialsSee restricted items

Features​

Tracking & Monitoring​

FeatureDescription
Shipment TrackingReal-time status updates
Delivery ConfirmationElectronic delivery proof
Address ValidationUSPS address verification

Documentation & Labels​

FeatureDescription
Label GenerationCreate shipping labels
Customs FormsInternational documentation
Rate CalculatorReal-time postage rates