Everything you need to integrate, operate, and send postcards with Postally.
Complete API documentation — 70+ endpoints, authentication, schemas, and code examples.
Download PDFStep-by-step guide for the web dashboard — sending postcards, managing recipients, campaigns, and billing.
Download PDFTechnical guide for production partners — SFTP specs, job format, status reporting, and quality requirements.
Download PDFPrivacy law support (GDPR, PIPEDA, CCPA), PCI DSS via Stripe, and security architecture for PHI-aware data handling. Postally is not currently HIPAA-certified or SOC 2-audited.
Download PDFStep-by-step guide for integrating Shopify with Postally — abandoned cart recovery, order thank-you cards, and more.
Download PDFCAD-style anatomy for the 4×6 postcard: trim 4″×6″, bleed added outside trim (4.25″×6.25″ full), 3.75″×5.75″ safe zone, and mailing-side zone placements.
Download PDFCAD-style anatomy for the 5×7 postcard: trim 5″×7″, 5.25″×7.25″ full with bleed, 4.75″×6.75″ safe zone, and mailing-side zone placements.
Download PDFCAD-style anatomy for the 6×9 postcard: trim 6″×9″, 6.25″×9.25″ full with bleed, 5.75″×8.75″ safe zone, and mailing-side zone placements.
Download PDFCAD-style anatomy for the 6×11 postcard: trim 6″×11″, 6.25″×11.25″ full with bleed, 5.75″×10.75″ safe zone, and mailing-side zone placements.
Download PDFExcel/CSV template with all supported recipient columns — name, address, return address, merge variables — plus a field reference sheet. Use as a starting point when preparing a recipient list for upload.
Download XLSXNeed machine-readable specs? Hit /v1/specs for JSON — template dimensions, test mode docs, versioning policy, and address coverage.
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