aid: stannp
name: Stannp
description: >
  Stannp is a direct mail platform that enables businesses to send physical
  postcards and letters programmatically via a REST API. The platform lets
  developers create campaigns, upload recipient lists, trigger individual mail
  pieces in real time, and track print and delivery status through webhooks and
  event endpoints. Authentication uses API key-based HTTP Basic Auth over HTTPS,
  and the API follows a simple JSON response envelope with success/data or
  success/error fields. Stannp serves businesses across the UK, US, and Canada
  with per-item pricing for letters and postcards at scale, and supports no-code
  integrations through Zapier and Make as well as official SDKs for PHP, Go, and
  C#.
type: Index
image: https://kinlane-productions.s3.amazonaws.com/apis-json/apis-json-logo.jpg
tags:
  - Direct Mail
  - Postcards
  - Letters
  - Print
  - Physical Mail
  - Marketing Automation
  - Campaigns
url: https://raw.githubusercontent.com/api-evangelist/stannp/refs/heads/main/apis.yml
created: '2026-06-12'
modified: '2026-06-12'
specificationVersion: '0.19'
apis:
  - aid: stannp:direct-mail-api
    name: Stannp Direct Mail API
    description: >
      REST API for programmatically sending physical letters and postcards,
      managing recipient groups, configuring campaigns, triggering individual
      mail pieces, and tracking delivery status through webhooks and event
      callbacks.
    humanURL: https://www.stannp.com/us/direct-mail-api
    baseURL: https://api-eu1.stannp.com/v1/
    tags:
      - Direct Mail
      - Letters
      - Postcards
      - Campaigns
      - Recipients
      - Webhooks
    properties:
      - type: Documentation
        url: https://www.stannp.com/us/direct-mail-api/guide
      - type: OpenAPI
        url: https://www.stannp.com/us/direct-mail-api
      - type: OpenAPI
        url: openapi/stannp-direct-mail-api-openapi.yml
      - type: JSONSchema
        url: json-schema/recipient.json
      - type: JSONSchema
        url: json-schema/mailpiece.json
      - type: JSONSchema
        url: json-schema/campaign.json
      - type: Vocabulary
        url: vocabulary/stannp-vocabulary.yml
      - type: JSONLDContext
        url: json-ld/stannp-context.jsonld
common:
  - type: Website
    url: https://www.stannp.com
  - type: Documentation
    url: https://www.stannp.com/us/direct-mail-api/guide
  - type: GitHubOrganization
    url: https://github.com/Stannp
  - type: LinkedIn
    url: https://www.linkedin.com/company/stannp-com-postcard-bulk-mailer
  - type: X
    url: https://twitter.com/stannpdm
  - type: Blog
    url: https://go.stannp.com/blogs
  - type: Pricing
    url: https://www.stannp.com/us/pricing-tiers
  - type: Plans
    url: plans/stannp-plans-pricing.yml
  - type: RateLimits
    url: rate-limits/stannp-rate-limits.yml
  - type: FinOps
    url: finops/stannp-finops.yml
maintainers:
  - FN: Kin Lane
    email: kin@apievangelist.com