PostGrid

aid: postgrid
name: PostGrid
description: PostGrid is a physical mail automation platform that provides REST APIs for sending printed letters, postcards,
  checks, and self-mailers at scale. It offers a Print & Mail API that enables developers to programmatically trigger and
  manage direct mail campaigns with full personalization and tracking support. PostGrid also provides US & Canada Address
  Verification and International Address Verification APIs covering 245+ countries for real-time autocomplete, standardization,
  geocoding, and bulk batch verification. The platform supports both test and live API environments, integrates natively with
  Salesforce, HubSpot, Zapier, and Marketo, and handles postage, printing, and delivery end-to-end.
type: Index
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
tags:
- Direct Mail
- Print & Mail
- Address Verification
- Address Validation
- Postcards
- Letters
- Checks
- Physical Mail
- Mail Automation
- Address Autocomplete
- Geocoding
url: https://raw.githubusercontent.com/api-evangelist/postgrid/refs/heads/main/apis.yml
created: '2026-06-12'
modified: '2026-06-12'
specificationVersion: '0.19'
apis:
- aid: postgrid:print-mail-api
  name: PostGrid Print & Mail API
  description: A REST API for programmatically sending letters, postcards, checks, and self-mailers. Handles printing, postage,
    and delivery with support for templates, contacts, tracking, webhooks, and both test and live modes. Authenticated via
    x-api-key header.
  humanURL: https://docs.postgrid.com/
  baseURL: https://api.postgrid.com
  tags:
  - Direct Mail
  - Letters
  - Postcards
  - Checks
  - Self-Mailers
  - Print
  - Mail Automation
  properties:
  - type: Documentation
    url: https://docs.postgrid.com/
  - type: OpenAPI
    url: https://postgrid.readme.io/llms.txt
  - type: PythonSDK
    url: https://github.com/postgrid/postgrid-python
  - type: NodeSDK
    url: https://github.com/postgrid/postgrid-node
  - type: Examples
    url: https://github.com/postgrid/postgrid-examples
- aid: postgrid:address-verification-api
  name: PostGrid US & Canada Address Verification API
  description: A REST API for real-time address autocomplete, verification, and standardization for US and Canadian addresses.
    Supports CASS-certified validation, geocoding (latitude/longitude), freeform address parsing, and batch verification for
    large-scale processing. Authenticated via x-api-key header with a default rate limit of 5 requests per second.
  humanURL: https://avdocs.postgrid.com/
  baseURL: https://api.postgrid.com/addver
  tags:
  - Address Verification
  - Address Validation
  - Address Autocomplete
  - CASS
  - Geocoding
  - US
  - Canada
  properties:
  - type: Documentation
    url: https://avdocs.postgrid.com/
- aid: postgrid:international-address-verification-api
  name: PostGrid International Address Verification API
  description: A REST API for verifying, standardizing, and autocompleting addresses across 245+ countries worldwide. Supports
    real-time lookups and bulk verification workflows. Authenticated via x-api-key header.
  humanURL: https://intdocs.postgrid.com/
  baseURL: https://api.postgrid.com/addver
  tags:
  - Address Verification
  - Address Validation
  - International
  - Global
  - Address Autocomplete
  properties:
  - type: Documentation
    url: https://intdocs.postgrid.com/
common:
- type: DomainSecurity
  url: security/postgrid-domain-security.yml
- type: Website
  url: https://www.postgrid.com/
- type: Documentation
  url: https://docs.postgrid.com/
- type: Developers
  url: https://www.postgrid.com/developers/
- type: GitHubOrganization
  url: https://github.com/postgrid
- type: LinkedIn
  url: https://www.linkedin.com/company/postgrid
- type: X
  url: https://x.com/postgridinc
- type: Blog
  url: https://www.postgrid.com/blog/
- type: ChangeLog
  url: https://www.postgrid.com/updates-and-releases/
- type: Pricing
  url: https://www.postgrid.com/pricing/
- type: StatusPage
  url: https://status.postgrid.com/
- type: Support
  url: https://www.postgrid.com/help-support/
- type: Plans
  url: plans/postgrid-plans-pricing.yml
- type: RateLimits
  url: rate-limits/postgrid-rate-limits.yml
- type: FinOps
  url: finops/postgrid-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com