Loops

Loops is an email platform for SaaS companies, combining marketing campaigns, transactional emails, and contact management with a developer-first API.

Loops publishes 11 APIs on the APIs.io network, including API key API, Campaigns API, Components API, and 8 more. Tagged areas include Email, Marketing Automation, Transactional Email, SaaS, and Communications.

Loops’ developer surface includes authentication, documentation, engineering blog, and 9 more developer resources.

🌐 Visit website 📡 Source on GitHub

33.8/100 thin ▬ flat Agent 49/100 agent native Full breakdown ↓
scored 2026-07-28 · rubric v0.6

AccessSelf serve

11 APIs

EmailMarketing AutomationTransactional EmailSaaSCommunications

Kin Score

Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6

Composite quality — 33.8/100 · thin

Contract Quality 13.8 / 25

Developer Ergonomics 4.3 / 20

Commercial Clarity 5.8 / 20

Operational Transparency 3.4 / 13

Governance 0.0 / 12

Discoverability 6.5 / 10

Agent readiness — 49/100 · agent native

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 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

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/loops: 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 11

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

Loops API key API

The API key API from Loops — 1 operation(s) for api key.

Loops Campaigns API

Create and manage email campaigns

Loops Components API

View email components

Loops Contact properties API

Manage contact properties

Loops Contacts API

Manage contacts in your audience

Loops Dedicated sending IPs API

View dedicated sending IP addresses

Loops Email messages API

Manage email message content for campaigns

Loops Events API

Trigger email sending with events

Loops Mailing lists API

View mailing lists

Loops Themes API

View email themes

Loops Transactional emails API

Send and view transactional emails

Scroll for all 11

Pricing Plans 1

Published pricing tiers and plan structures.

Loops Plans Pricing

1 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Loops Rate Limits

1 limits

RATE LIMITS

FinOps 1

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

Loops Finops

FINOPS

Security Posture 2

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

Loops Authentication

http · 1 scheme

SECURITY

Loops Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

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

Loops Agentic Access

24 operations · 10 acting

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

LlmsText

LlmsText

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 1

Status, limits, changes, and where to get help

RateLimits

RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

Plans

Plans

FinOps

FinOps

Company 3

The organization behind the API

LinkedIn

Website

Website

Blog

Blog

Source (apis.yml)

aid: loops
url: https://raw.githubusercontent.com/api-evangelist/loops/refs/heads/main/apis.yml
name: Loops
kind: company
description: Loops is an email platform for SaaS companies, combining marketing campaigns, transactional emails, and contact
  management with a developer-first API.
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/loops.png
tags:
- Email
- Marketing Automation
- Transactional Email
- SaaS
- Communications
created: '2026-05-08'
modified: '2026-05-19'
specificationVersion: '0.19'
apis:
- aid: loops:loops-api-key-api
  name: Loops API key API
  description: The API key API from Loops — 1 operation(s) for api key.
  humanURL: https://loops.so/docs/api-reference/intro
  baseURL: https://app.loops.so/api/v1
  tags:
  - API key
  properties:
  - type: OpenAPI
    url: openapi/loops-api-key-api-openapi.yml
  - type: Documentation
    url: https://loops.so/docs/api-reference/intro
- aid: loops:loops-campaigns-api
  name: Loops Campaigns API
  description: Create and manage email campaigns
  humanURL: https://loops.so/docs/api-reference/intro
  baseURL: https://app.loops.so/api/v1
  tags:
  - Campaigns
  properties:
  - type: OpenAPI
    url: openapi/loops-campaigns-api-openapi.yml
  - type: Documentation
    url: https://loops.so/docs/api-reference/intro
- aid: loops:loops-components-api
  name: Loops Components API
  description: View email components
  humanURL: https://loops.so/docs/api-reference/intro
  baseURL: https://app.loops.so/api/v1
  tags:
  - Components
  properties:
  - type: OpenAPI
    url: openapi/loops-components-api-openapi.yml
  - type: Documentation
    url: https://loops.so/docs/api-reference/intro
- aid: loops:loops-contact-properties-api
  name: Loops Contact properties API
  description: Manage contact properties
  humanURL: https://loops.so/docs/api-reference/intro
  baseURL: https://app.loops.so/api/v1
  tags:
  - Contact properties
  properties:
  - type: OpenAPI
    url: openapi/loops-contact-properties-api-openapi.yml
  - type: Documentation
    url: https://loops.so/docs/api-reference/intro
- aid: loops:loops-contacts-api
  name: Loops Contacts API
  description: Manage contacts in your audience
  humanURL: https://loops.so/docs/api-reference/intro
  baseURL: https://app.loops.so/api/v1
  tags:
  - Contacts
  properties:
  - type: OpenAPI
    url: openapi/loops-contacts-api-openapi.yml
  - type: Documentation
    url: https://loops.so/docs/api-reference/intro
- aid: loops:loops-dedicated-sending-ips-api
  name: Loops Dedicated sending IPs API
  description: View dedicated sending IP addresses
  humanURL: https://loops.so/docs/api-reference/intro
  baseURL: https://app.loops.so/api/v1
  tags:
  - Dedicated sending IPs
  properties:
  - type: OpenAPI
    url: openapi/loops-dedicated-sending-ips-api-openapi.yml
  - type: Documentation
    url: https://loops.so/docs/api-reference/intro
- aid: loops:loops-email-messages-api
  name: Loops Email messages API
  description: Manage email message content for campaigns
  humanURL: https://loops.so/docs/api-reference/intro
  baseURL: https://app.loops.so/api/v1
  tags:
  - Email messages
  properties:
  - type: OpenAPI
    url: openapi/loops-email-messages-api-openapi.yml
  - type: Documentation
    url: https://loops.so/docs/api-reference/intro
- aid: loops:loops-events-api
  name: Loops Events API
  description: Trigger email sending with events
  humanURL: https://loops.so/docs/api-reference/intro
  baseURL: https://app.loops.so/api/v1
  tags:
  - Events
  properties:
  - type: OpenAPI
    url: openapi/loops-events-api-openapi.yml
  - type: Documentation
    url: https://loops.so/docs/api-reference/intro
- aid: loops:loops-mailing-lists-api
  name: Loops Mailing lists API
  description: View mailing lists
  humanURL: https://loops.so/docs/api-reference/intro
  baseURL: https://app.loops.so/api/v1
  tags:
  - Mailing lists
  properties:
  - type: OpenAPI
    url: openapi/loops-mailing-lists-api-openapi.yml
  - type: Documentation
    url: https://loops.so/docs/api-reference/intro
- aid: loops:loops-themes-api
  name: Loops Themes API
  description: View email themes
  humanURL: https://loops.so/docs/api-reference/intro
  baseURL: https://app.loops.so/api/v1
  tags:
  - Themes
  properties:
  - type: OpenAPI
    url: openapi/loops-themes-api-openapi.yml
  - type: Documentation
    url: https://loops.so/docs/api-reference/intro
- aid: loops:loops-transactional-emails-api
  name: Loops Transactional emails API
  description: Send and view transactional emails
  humanURL: https://loops.so/docs/api-reference/intro
  baseURL: https://app.loops.so/api/v1
  tags:
  - Transactional emails
  properties:
  - type: OpenAPI
    url: openapi/loops-transactional-emails-api-openapi.yml
  - type: Documentation
    url: https://loops.so/docs/api-reference/intro
common:
- type: AgenticAccess
  url: agentic-access/loops-agentic-access.yml
- type: DomainSecurity
  url: security/loops-domain-security.yml
- type: Authentication
  url: authentication/loops-authentication.yml
- type: GitHubOrganization
  url: https://github.com/Loops-so
- type: LinkedIn
  url: https://www.linkedin.com/company/sendwithloops
- type: Website
  url: https://loops.so/
- type: Documentation
  url: https://loops.so/docs/api-reference/intro
- type: Plans
  url: plans/loops-plans-pricing.yml
- type: RateLimits
  url: rate-limits/loops-rate-limits.yml
- type: FinOps
  url: finops/loops-finops.yml
- type: LlmsText
  url: https://loops.so/llms.txt
- url: https://loops.so/changelog
  type: Blog
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com