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 is listed with 1 API on the APIs.io network. Tagged areas include Company, E-Commerce, Digital Products, Payments, and Subscription.

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 📡 Profile data on GitHub

54.8/100 strong ▬ flat Agent 25/100 agent aware Front door AI 3/6 light Heartbeat 20/100 slowing saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessPaid

1 API

Company E-Commerce Digital Products Payments Subscription Checkout Membership Licensing Creator Economy Webhook

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 54.8/100 · strong

Contract Quality 8.3 / 21

Developer Ergonomics 10.9 / 17

Access Clarity 14.3 / 17

Operational Transparency 5.2 / 11

Contract Governance 1.9 / 10

Discoverability 5.6 / 9

Regulatory Posture 3.3 / 15

Agent readiness — 25/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

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

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

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.

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

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/.

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Agent readiness — checks not met, largest first (exact, from this profile):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document

8 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 39.0 — up to +15.3 composite points
Contract Governance scores 18.2 — up to +9.8 composite points
Developer Ergonomics scores 64.3 — up to +7.1 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from the provider profile at artifacts.apis.io/sendowl/apis.yml: open an issue on github.com/api-evangelist/sendowl to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Commerce Platform Ecosystems (Shopify, WooCommerce, Stripe Apps)	standard	17.1	-	-
Stripe App Marketplace and Partner Ecosystem (builders on Stripe)	standard	17.1	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

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 ...

SendOwl API pricing

Prices published by SendOwl, read 2026-10-28 from www.sendowl.com/pricing.

Plan	Price
Launch	$39/month Includes: 5k orders per year, $10,000 sales per year, 10 GB bandwidth per month, unlimited products, unlimited
Launch (annual)	$32.50/month Includes: Same as Launch
Grow	$87/month Includes: 25k orders per year, $36,000 sales per year, 20 GB bandwidth per month
Grow (annual)	$72.50/month Includes: Same as Grow
Scale	$159/month Includes: 50k orders per year, $100,000 sales per year, 50 GB bandwidth per month
Scale (annual)	$132.50/month Includes: Same as Scale
Business	Business plans start at $299/month for up to $200k in annual sales Includes: up to $200k in annual sales; priority support; up to $5M+ annual revenue across business plans

Plan details, limits and sources →

Rate limits

: 1 1s

Rate-limit details →

Billed by: plan billed annually · FinOps profile →

Pricing Plans 2

Published pricing tiers and plan structures.

Sendowl Plans Pricing

7 plans

PLANS

Sendowl Price Estimates

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Sendowl Rate Limits

1 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Sendowl Finops

FINOPS

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

GettingStarted

SignUp

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

ErrorCatalog

Lifecycle

Conformance

Components

DataModel

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

TermsOfService

PrivacyPolicy

Plans

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

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
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: paid
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Paid
  confidence: high
  source:
  - plans
  - authentication
  - rate-limits
  - security
  - sandbox
  generated: '2026-11-06'
  method: derived
specificationVersion: '0.23'
created: '2026-08-12'
modified: '2026-08-12'
image: https://www.sendowl.com/twitter-image.png
tags:
- Company
- E-Commerce
- Digital Products
- Payments
- Subscription
- Checkout
- Membership
- Licensing
- Creator Economy
- Webhook
tags_raw:
- 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:
  - Product
  - Order
  - Subscription
  - Discounts
  - Licenses
  - Bundles
  tags_raw:
  - 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

SendOwl API — frequently asked questions

Does SendOwl have an API?

Yes. APIs.io lists 1 API from SendOwl, including SendOwl API.

How do I authenticate with the SendOwl API?

SendOwl uses bearer-token authentication (http · 1 scheme). The details are profiled on APIs.io as Sendowl Authentication.

How much does the SendOwl API cost?

SendOwl publishes its prices; its Launch plan is $39/month as of 2026-10-28. APIs.io lists 7 pricing plans for SendOwl, with each plan's price, limits and inclusions under Pricing on this page.

Is the SendOwl API ready for AI agents?

SendOwl has a Kin Score of 54.8 out of 100 (strong) and an Agent Readiness score of 25.2 (agent-aware), scored by API Evangelist on 2026-11-06.

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