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Courier

Courier is a multi-channel notification API offering routing across email, SMS, push, chat, and in-app, with templates, preferences, and a no-code studio.

agent ready

Limited machine-readable signal and partial portal coverage — documentation a human can read, but little a machine or agent can consume without scraping.

Kin Score

API Evangelist profiles Courier the way a machine reads it — 55 machine-readable artifacts across 22 APIs, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.

Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — Courier scores 35.7/100 (thin), with a separate agent-readiness read of 42/100 (agent ready). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.

Kin Score

This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance.

Kin Score Kin Score How this is scored →
scored 2026-08-17 · rubric v0.11.0
Composite quality — 35.7/100 · thin
Contract Quality 17.4 / 25
Developer Ergonomics 2.6 / 20
Commercial Clarity 4.2 / 20
Operational Transparency 1.4 / 13
Governance 5.7 / 12
Discoverability 6.5 / 10
Regulatory · Telecommunications 3.5 / 15
Agent readiness — 42/100 · agent ready
Machine-Readable Contract 18 / 18
Agentic Access Contract derived 2.5 / 10
MCP Server 0 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 8.0 / 8
Request/Response Examples partial 3.5 / 7
Rate-Limit Signaling documented 3.5 / 7
Typed Event Surface derived 1.5 / 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
Courier Kin Score — API readiness rating by API Evangelist

Put this on your own site. The badge is drawn live from Courier's current Kin Score — paste it once and it updates itself every time the score is recomputed. It follows your visitor's light or dark setting, and it links back here so anyone who sees it can read the full breakdown.

<!-- Kin Score · API Evangelist -->
<a href="https://providers.apievangelist.com/providers/courier/"
   title="Courier on API Evangelist — API profile and Kin Score">
  <img src="https://apis.io/badge/courier.svg"
       alt="Courier Kin Score — API readiness rating by API Evangelist" width="150" height="150" loading="lazy">
</a>

More shapes, themes and sizes → · Score as JSON · How badges work

How we profile Courier

Each block below is one kind of artifact we hold for Courier. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.

APIs 22

Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.

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

Courier Inbox Real-Time API

WebSocket service that delivers Inbox messages and message-state events (read, unread, opened, archived, clicked, mark-all-read, archive-all, archive-read) to authenticated user...

Courier Audiences API

The Audiences API from Courier — 3 operation(s) for audiences.

Courier Audit Events API

The Audit Events API from Courier — 2 operation(s) for audit events.

Courier Authentication API

The Authentication API from Courier — 1 operation(s) for authentication.

Courier Automations API

The Automations API from Courier — 3 operation(s) for automations.

Courier Brands API

The Brands API from Courier — 2 operation(s) for brands.

Courier Bulk API

The Bulk API from Courier — 4 operation(s) for bulk.

Courier Courier Create API

The Courier Create API from Courier — 4 operation(s) for courier create.

Courier Device Tokens API

The Device Tokens API from Courier — 2 operation(s) for device tokens.

Courier Inbound API

The Inbound API from Courier — 1 operation(s) for inbound.

Courier Journeys API

The Journeys API from Courier — 2 operation(s) for journeys.

Courier Lists API

The Lists API from Courier — 5 operation(s) for lists.

Courier Notification Templates API

The Notification Templates API from Courier — 8 operation(s) for notification templates.

Courier Providers API

The Providers API from Courier — 3 operation(s) for providers.

Courier Routing Strategies API

The Routing Strategies API from Courier — 3 operation(s) for routing strategies.

Courier Send API

The Send API from Courier — 1 operation(s) for send.

Courier Sent Messages API

The Sent Messages API from Courier — 6 operation(s) for sent messages.

Courier Tenants API

The Tenants API from Courier — 4 operation(s) for tenants.

Courier Translations API

The Translations API from Courier — 1 operation(s) for translations.

Courier User Preferences API

The User Preferences API from Courier — 2 operation(s) for user preferences.

Courier User Profiles API

The User Profiles API from Courier — 2 operation(s) for user profiles.

Courier User Tenants API

The User Tenants API from Courier — 2 operation(s) for user tenants.

Scroll within the panel for all 22 ·

Open Collections 23

Open, tool-agnostic collections carry the same runnable value as Postman without locking you to one client — the portable, forkable form of the same exercise.

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

Scroll within the panel for all 23 ·

GraphQL 1

Where a provider ships GraphQL, the schema is the contract. We profile it alongside the REST surface so the whole interface is legible in one place.

GraphQL schemas published by this provider.

Courier GraphQL API

Courier provides a native GraphQL API in addition to its REST API. The GraphQL endpoint is available at `https://api.courier.com/graphql` and supports querying and mutating noti...

GRAPHQL

Pricing Plans 1

Pricing is part of the interface. Machine-readable plans tell you what a tier costs and includes before you commit — one of the six things the Kin Score reads for commercial clarity.

Published pricing tiers and plan structures.

Courier Plans Pricing

1 plans

PLANS

Rate Limits 1

Rate limits are the difference between a demo that works and a production integration that doesn't fall over. Publishing them is an operational-transparency signal — and a hard requirement for any agent that plans its own throughput.

Documented rate limits and quota policies.

Courier Rate Limits

1 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals let a buyer model the financial operations of an API before it's live. We profile them for the same reason we profile pricing: the money is part of the contract.

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

Event Specifications 1

Not every API is request/response. AsyncAPI describes the event-driven and streaming side — the webhooks and channels — so the asynchronous half of the interface is documented the same way the synchronous half is.

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

Courier Inbox Real-Time API

AsyncAPI definition for Courier's Inbox WebSocket service used by the Courier client SDKs (JS, React, React Native, iOS, Android, Flutter, Web Components) to receive real-time, ...

ASYNCAPI

Spectral Rules 1

Governance rulesets we run against this provider's specs — the automated checks behind parts of the score. Profiling them makes the quality bar explicit and re-runnable, not a matter of opinion.

Courier API Rules

9 rules · 1 errors · 7 warnings

SPECTRAL

Security Posture 3

Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.

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

Courier Authentication

http · 1 scheme

SECURITY

Courier Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Courier Trust Center

SOC 2, PCI DSS, HIPAA, GDPR

SECURITY

Agentic Access 1

An x-agentic-access contract marks which operations are safe for an agent to run on its own and which need a human in the loop. It is the difference between an API an agent can use and one it can use safely.

Recommended x-agentic-access execution contracts for AI agents.

Courier Agentic Access

103 operations · 60 acting

103 operations · 60 acting

AGENTIC

Resources

Every other property we hold for Courier — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

Build 1

SDKs, sample code, and the tooling you integrate with

Access & Security 3

Authentication, authorization, and security posture

Operate 1

Status, limits, changes, and where to get help

Commercial 2

Pricing, plans, and the legal terms of use

Company 3

The organization behind the API

← All providers · Data indexed from github.com/api-evangelist/courier · machine-readable index on apis.io

Where this information came from

This is an independent, third-party profile of Courier, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.

The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.

Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.

info@apievangelist.com · Read the full data-sourcing policy →
On a security or compliance team? Put security in the subject line and you will get a person, not a form — we will tell you exactly which public URLs this profile was built from.