SendOwl

SendOwl is a UK-based digital commerce platform that lets creators and small businesses sell digital products, subscriptions, memberships, license keys, drip-delivered courses and physical goods, with hosted checkout, automated file delivery, PDF stamping, affiliate programs, discount codes and EU VAT handling. It exposes a public REST API at api.sendowl.com covering products, bundles (packages), subscriptions, drip items, orders, discounts and licenses in both JSON and XML, authenticated with HTTP Basic using an account API key and secret, alongside an outbound webhook surface signed with HMAC-SHA256 and a browser-side sendowl.js library that drives the lightbox checkout and cart widget.

SendOwl publishes 1 API on the APIs.io network. Tagged areas include Company, E-Commerce, Digital Products, Payments, and Subscriptions.

The SendOwl catalog on APIs.io includes 1 event-driven AsyncAPI specification.

SendOwl’s developer surface includes documentation, API reference, getting-started guide, support, engineering blog, pricing, signup flow, and 20 more developer resources.

🌐 Visit website 📡 Source on GitHub
53.0/100 developing ▬ flat Agent 37/100 agent ready Full breakdown ↓
scored 2026-08-17 · rubric v0.11.0
1 APIs
CompanyE-CommerceDigital ProductsPaymentsSubscriptionsCheckoutMembershipsLicensingCreator EconomyWebhooks

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-17 · rubric v0.11.0
Composite quality — 53.0/100 · developing
Contract Quality 11.0 / 21
Developer Ergonomics 10.0 / 17
Commercial Clarity 13.0 / 17
Operational Transparency 5.5 / 11
Governance 1.3 / 10
Discoverability 6.5 / 9
Regulatory Posture 5.9 / 15
Agent readiness — 37/100 · agent ready
Machine-Readable Contract 18 / 18
Agentic Access Contract 0 / 10
MCP Server 0 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 8 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 6 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 0 / 4
Regulatory Posture applies to this provider. Its tags matched the Payments regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.
The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/sendowl: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 1

Individual APIs this provider publishes, each with its own machine-readable definition.

SendOwl API

The SendOwl REST API provides third-party applications access to a merchant account's products, bundles (packages), subscriptions, drip items, orders, discounts, discount codes ...

Pricing Plans 1

Published pricing tiers and plan structures.

Sendowl Plans Pricing

4 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Sendowl Rate Limits

1 limits

RATE LIMITS

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Sendowl Webhooks

ASYNCAPI

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Sendowl Authentication

http · 1 scheme

SECURITY

Sendowl Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Resources

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal
DeveloperPortal
 GettingStarted
GettingStarted
 SignUp
SignUp
 Sandbox
Sandbox

Documentation 2

Reference material describing how the API behaves

Documentation
Documentation
 APIReference
APIReference

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt
LLMsTxt

Design & Contract 7

Pagination, idempotency, versioning, errors, and events

Conventions
Conventions
 ErrorCatalog
ErrorCatalog
 Lifecycle
Lifecycle
 Conformance
Conformance
 Components
Components
 DataModel
DataModel
 Webhooks
Webhooks

Scroll for all 7

Build 2

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization
 Packages
Packages

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity
 Authentication
Authentication

Operate 3

Status, limits, changes, and where to get help

Support
Support
 StatusPage
StatusPage
 RateLimits
RateLimits

Commercial 4

Pricing, plans, and the legal terms of use

Pricing
Pricing
 TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy
 Plans
Plans

Company 2

The organization behind the API

Website
Website
 Blog
Blog

Source (apis.yml)

apis.yml Raw ↑ 
aid: sendowl
name: SendOwl
description: SendOwl is a UK-based digital commerce platform that lets creators and small businesses sell digital products,
  subscriptions, memberships, license keys, drip-delivered courses and physical goods, with hosted checkout, automated file
  delivery, PDF stamping, affiliate programs, discount codes and EU VAT handling. It exposes a public REST API at api.sendowl.com
  covering products, bundles (packages), subscriptions, drip items, orders, discounts and licenses in both JSON and XML, authenticated
  with HTTP Basic using an account API key and secret, alongside an outbound webhook surface signed with HMAC-SHA256 and a
  browser-side sendowl.js library that drives the lightbox checkout and cart widget.
url: https://raw.githubusercontent.com/api-evangelist/sendowl/refs/heads/main/apis.yml
x-type: company
x-source: harvest:marketing-integration-graph
specificationVersion: '0.20'
created: '2026-08-12'
modified: '2026-08-12'
image: https://www.sendowl.com/twitter-image.png
tags:
- Company
- E-Commerce
- Digital Products
- Payments
- Subscriptions
- Checkout
- Memberships
- Licensing
- Creator Economy
- Webhooks
apis:
- aid: sendowl:sendowl-api
  name: SendOwl API
  description: The SendOwl REST API provides third-party applications access to a merchant account's products, bundles (packages),
    subscriptions, drip items, orders, discounts, discount codes and license keys. Requests and responses are available in
    both JSON and XML selected via the Accept header, index actions are paginated with page/per_page (max 50), and authorization
    uses HTTP Basic with the API key and secret generated in the SendOwl dashboard.
  humanURL: https://dashboard.sendowl.com/developers/api/introduction
  baseURL: https://api.sendowl.com/api/v1
  tags:
  - Products
  - Orders
  - Subscriptions
  - Discounts
  - Licenses
  - Bundles
  properties:
  - type: APIReference
    url: https://dashboard.sendowl.com/developers/api/introduction
  - type: Authentication
    url: authentication/sendowl-authentication.yml
  - type: Conventions
    url: conventions/sendowl-conventions.yml
  - type: ErrorCatalog
    url: errors/sendowl-problem-types.yml
  - type: RateLimits
    url: rate-limits/sendowl-rate-limits.yml
  - type: DataModel
    url: data-model/sendowl-data-model.yml
  - type: Webhooks
    url: asyncapi/sendowl-webhooks.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: DomainSecurity
  url: security/sendowl-domain-security.yml
- type: Website
  url: https://sendowl.com/
- type: DeveloperPortal
  url: https://dashboard.sendowl.com/developers
- type: Documentation
  url: https://help.sendowl.com/help
- type: APIReference
  url: https://dashboard.sendowl.com/developers/api/introduction
- type: GettingStarted
  url: https://help.sendowl.com/help/developer-overview-custom-integrations
- type: Support
  url: https://help.sendowl.com/help
- type: Blog
  url: https://www.sendowl.com/blog
- type: GitHubOrganization
  url: https://github.com/SendOwl
- type: Pricing
  url: https://www.sendowl.com/pricing
- type: SignUp
  url: https://www.sendowl.com/signup
- type: TermsOfService
  url: https://www.sendowl.com/terms
- type: PrivacyPolicy
  url: https://www.sendowl.com/privacy
- type: StatusPage
  url: https://sendowl.status.io/
- type: Plans
  url: plans/sendowl-plans-pricing.yml
- type: RateLimits
  url: rate-limits/sendowl-rate-limits.yml
- type: Authentication
  url: authentication/sendowl-authentication.yml
- type: Conventions
  url: conventions/sendowl-conventions.yml
- type: ErrorCatalog
  url: errors/sendowl-problem-types.yml
- type: Lifecycle
  url: lifecycle/sendowl-lifecycle.yml
- type: Conformance
  url: conformance/sendowl-conformance.yml
- type: Packages
  url: packages/sendowl-packages.yml
- type: Components
  url: components/sendowl-components.yml
- type: Sandbox
  url: sandbox/sendowl-sandbox.yml
- type: DataModel
  url: data-model/sendowl-data-model.yml
- type: Webhooks
  url: asyncapi/sendowl-webhooks.yml
- type: LLMsTxt
  url: llms/sendowl-llms.txt
x-vouched-by:
- Drip
- MailerLite
x-vouch-count: 2
x-enrichment:
  date: '2026-08-12'
  status: enriched
  artifacts_added: 15
  pass: local-v1