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Mailchimp

Mailchimp is an Intuit company providing a marketing automation platform and email marketing service for managing mailing lists, creating email marketing campaigns, and automating marketing workflows. It exposes two distinct developer surfaces: the Marketing API (v3, REST, 298 operations at https://.api.mailchimp.com/3.0) covering audiences, members, tags, segments, campaigns, content, automations, customer journeys, reports, e-commerce stores and orders, file manager, templates, landing pages, batch operations and webhooks; and Mailchimp Transactional, formerly Mandrill (99 RPC-style POST methods at https://mandrillapp.com/api/1.0), for one-to-one transactional email and SMS, inbound processing, dedicated IP management and subaccounts. Authentication is an API key or OAuth 2 for the Marketing API and a body-parameter API key for Transactional. Mailchimp runs a hosted MCP server for the Transactional API, publishes eight official client libraries and two mobile SDKs, and delivers audience events as HMAC-signed webhooks.

agent ready

Reference-quality API operations across every facet — a rich contract, published governance, transparent operations, and machine-readable commercial terms.

Kin Score

API Evangelist profiles Mailchimp the way a machine reads it — 384 machine-readable artifacts across 4 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 — Mailchimp scores 77.8/100 (exemplar), with a separate agent-readiness read of 43/100 (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. Every facet and dimension name is a link: it opens that measurement's page on APIs.io, where the rating runs across the whole catalog — the exact checks that feed it, how every profiled provider distributes on it, and who is at the top of it.

Kin Score Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0
Composite quality — 77.8/100 · exemplar
Contract Quality 17.3 / 25
Access Clarity 15.3 / 20
Discoverability 7.6 / 10
Mailchimp Kin Score — API readiness rating by API Evangelist

Put this on your own site. The badge is drawn live from Mailchimp'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/mailchimp/"
   title="Mailchimp on API Evangelist — API profile and Kin Score">
  <img src="https://apis.io/badge/mailchimp.svg"
       alt="Mailchimp 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 Mailchimp

Each block below is one kind of artifact we hold for Mailchimp. 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 45

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.

Mailchimp Open Commerce

An open source, API-first, modular commerce stack built using Node.js, React, and GraphQL. Formerly known as Reaction Commerce, the project has been discontinued but documentati...

Mailchimp Allowlists API

Manage the allowlist of email addresses that bypass the rejection blacklist.

Mailchimp Automations API

The Automations API from Mailchimp — 13 operation(s) for automations.

Mailchimp Batches API

The Batches API from Mailchimp — 2 operation(s) for batches.

Mailchimp Campaigns API

The Campaigns API from Mailchimp — 18 operation(s) for campaigns.

Mailchimp Conversations API

The Conversations API from Mailchimp — 4 operation(s) for conversations.

Mailchimp Ecommerce API

The Ecommerce API from Mailchimp — 10 operation(s) for ecommerce.

Mailchimp Exports API

The Exports API from Mailchimp — 7 operation(s) for exports.

Mailchimp IPs API

Manage dedicated IP addresses associated with the account.

Mailchimp Lists API

The Lists API from Mailchimp — 11 operation(s) for lists.

Mailchimp Messages API

The Messages API from Mailchimp — 13 operation(s) for messages.

Mailchimp Metadata API

Manage custom metadata fields that can be attached to messages for tracking and filtering.

Mailchimp Rejects API

Manage the rejection blacklist, which prevents delivery to addresses that have previously bounced or been reported as spam.

Mailchimp Reporting API

The Reporting API from Mailchimp — 12 operation(s) for reporting.

Mailchimp Reports API

The Reports API from Mailchimp — 24 operation(s) for reports.

Mailchimp Root API

The Root API from Mailchimp — 1 operation(s) for root.

Mailchimp Senders API

Retrieve sender information and statistics for verified sending domains and email addresses.

Mailchimp Subaccounts API

Manage subaccounts for organizing sending and reporting within a single Mandrill account.

Mailchimp Surveys API

The Surveys API from Mailchimp — 12 operation(s) for surveys.

Mailchimp Tags API

The Tags API from Mailchimp — 5 operation(s) for tags.

Mailchimp Templates API

The Templates API from Mailchimp — 11 operation(s) for templates.

Mailchimp Users API

Retrieve information about the authenticated Mandrill account.

Mailchimp Webhooks API

The Webhooks API from Mailchimp — 9 operation(s) for webhooks.

Mailchimp Account Export API

The accountExport API from Mailchimp — 1 operation(s) for accountexport.

Mailchimp Account Exports API

The accountExports API from Mailchimp — 1 operation(s) for accountexports.

Mailchimp Activity Feed API

The activityFeed API from Mailchimp — 1 operation(s) for activityfeed.

Mailchimp Audiences API

The audiences API from Mailchimp — 2 operation(s) for audiences.

Mailchimp Authorized Apps API

The authorizedApps API from Mailchimp — 2 operation(s) for authorizedapps.

Mailchimp Batch Webhooks API

The batchWebhooks API from Mailchimp — 2 operation(s) for batchwebhooks.

Mailchimp Campaign Folders API

The campaignFolders API from Mailchimp — 2 operation(s) for campaignfolders.

Mailchimp Connected Sites API

The connectedSites API from Mailchimp — 5 operation(s) for connectedsites.

Mailchimp Contacts API

The contacts API from Mailchimp — 6 operation(s) for contacts.

Mailchimp Customer Journeys API

The customerJourneys API from Mailchimp — 1 operation(s) for customerjourneys.

Mailchimp Facebook Ads API

The facebookAds API from Mailchimp — 2 operation(s) for facebookads.

Mailchimp File Manager API

The fileManager API from Mailchimp — 5 operation(s) for filemanager.

Mailchimp Inbound API

The inbound API from Mailchimp — 9 operation(s) for inbound.

Mailchimp Landing Pages API

The landingPages API from Mailchimp — 5 operation(s) for landingpages.

Mailchimp Mctemplates API

The mctemplates API from Mailchimp — 4 operation(s) for mctemplates.

Mailchimp Ping API

The ping API from Mailchimp — 1 operation(s) for ping.

Mailchimp Search Campaigns API

The searchCampaigns API from Mailchimp — 1 operation(s) for searchcampaigns.

Mailchimp Search Members API

The searchMembers API from Mailchimp — 1 operation(s) for searchmembers.

Mailchimp Sms Campaigns API

The sms-campaigns API from Mailchimp — 6 operation(s) for sms-campaigns.

Mailchimp Template Folders API

The templateFolders API from Mailchimp — 2 operation(s) for templatefolders.

Mailchimp URLS API

The urls API from Mailchimp — 4 operation(s) for urls.

Mailchimp Verified Domains API

The verifiedDomains API from Mailchimp — 3 operation(s) for verifieddomains.

Scroll within the panel for all 45 ·

Postman Collections 2

A runnable collection turns the contract into something a developer can execute in seconds. We profile them because the fastest way to trust an API is to make a real call against it.

Ready-to-run Postman collections for exercising this provider's APIs.

Open Collections 125

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).

API Collection

OPEN COLLECTION

Mailchimp Marketing API

OPEN COLLECTION

Mailchimp Marketing API

OPEN COLLECTION

Scroll within the panel for all 125 ·

Arazzo Workflows 19

Real integrations are rarely a single call. Arazzo describes the multi-step sequences — auth, then create, then confirm — so both a human and an agent can follow the choreography, not just the endpoints.

Multi-step API workflows described with the Arazzo specification.

Mailchimp Add Member and Attach a Note

Subscribe a member to an audience and attach an internal note to them.

ARAZZO

Mailchimp Add Member and Tag

Subscribe a member to an audience and immediately apply a tag.

ARAZZO

Mailchimp Pre-Send Checklist then Send Campaign

Run the send checklist for a campaign and only send if it is ready.

ARAZZO

Mailchimp Create Audience and Add First Member

Create a new audience (list) and subscribe an initial member to it.

ARAZZO

Mailchimp Create Campaign, Set Content, and Send Test

Create a campaign, set its content, then send a test email to reviewers.

ARAZZO

Mailchimp Create Campaign, Set Content, and Schedule

Create a regular campaign, set its HTML content, then schedule delivery.

ARAZZO

Mailchimp Create Campaign, Set Content, and Send

Create a regular campaign, set its HTML content, then send it.

ARAZZO

Mailchimp Create Merge Field and Add Member

Add a custom audience field, then add a member that populates it.

ARAZZO

Mailchimp Create Static Segment and Add Members

Create a static segment (tag-style group), then add a member to it.

ARAZZO

Mailchimp Create Template, Build Campaign, and Send

Create a reusable template, build a campaign from it, then send.

ARAZZO

Mailchimp Find and Pause an Automation

List classic automations, pick the first, and pause all its emails.

ARAZZO

Mailchimp Find and Start an Automation

List classic automations, pick the first, and start all its emails.

ARAZZO

Mailchimp Find Campaign and Pull Its Report

Search campaigns by query, then retrieve the report for the first match.

ARAZZO

Mailchimp Find Member, Mark VIP, and Tag

Search a member by email, flag them VIP, then apply a VIP tag.

ARAZZO

Mailchimp Onboard Member into a Static Segment

Add a member to an audience and place them into a static segment.

ARAZZO

Mailchimp Add-or-Update Member and Tag

Idempotently add or update a member with PUT, then tag them.

ARAZZO

Mailchimp Replicate Campaign and Send Test

Clone an existing campaign and send a test of the copy to reviewers.

ARAZZO

Mailchimp Sync Static Segment Members

Create a static segment, then batch add and remove members in one call.

ARAZZO

Mailchimp Upsert Audience Member

Find a member by email and update them, otherwise add them to the audience.

ARAZZO

Scroll within the panel for all 19 ·

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.

Mailchimp GraphQL API

An open source, API-first, modular commerce stack built using Node.js, React, and GraphQL. Formerly known as Reaction Commerce, the project has been discontinued but documentati...

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 things the Kin Score reads for access clarity — renamed from commercial clarity in rubric 0.12, because a free statutory interface has access terms and no commercial ones.

Published pricing tiers and plan structures.

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.

Mailchimp Rate Limits

7 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.

Features 16

The notable capabilities this provider advertises, captured as structured features so they can be searched and compared instead of read one landing page at a time.

Notable capabilities this provider offers.

Free: 250 contacts, ~500 sends/mo, 1 audience
Essentials at $13/mo (500 contacts): A/B testing, 4-step automations
Standard at $20/mo: 200 automation flows, Generative AI
Premium at $350/mo: predictive segmentation, multivariate testing
Marketing API v3 with REST + Batch operations
Concurrency limit: 10 simultaneous connections per user
Batch operations: 1,000 ops/request, 500 open batches
Transactional Email (Mandrill) priced separately
OAuth 2.0 and API keys
Webhooks for subscribe/unsubscribe/profile/cleaned/upemail/campaign
Audiences with tags, segments, custom fields
Automations with conditional logic
Customer Journey Builder
Landing pages, popup forms, signup forms
Reports: opens, clicks, bounces, conversions
Pricing scales with active contact count

Scroll within the panel for all 16 ·

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.

Mailchimp Marketing Webhooks

AsyncAPI description of Mailchimp Marketing audience webhooks. Mailchimp delivers list/audience events to a customer-configured callback URL via HTTP POST with an `application/x...

ASYNCAPI

Semantic Vocabularies 2

JSON-LD contexts give the data shared meaning across APIs. We profile them because semantics are what let a machine reconcile 'customer' here with 'customer' somewhere else.

JSON-LD contexts and semantic vocabularies used across these APIs.

context Context

0 classes · 5 properties

JSON-LD

Mailchimp Transactional Context

0 classes · 0 properties

JSON-LD

Spectral Rules 2

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.

Mailchimp API Rules

5 rules · 4 warnings

SPECTRAL

Mailchimp API Rules

16 rules · 7 errors · 9 warnings

SPECTRAL

JSON Schema 50

Standalone JSON Schema definitions describe the data models behind the API. We profile them so the shapes are validatable on their own — useful long after a single request is forgotten.

Standalone JSON Schema definitions for this provider's data models.

Mailchimp Audience (List)

21 properties

JSON SCHEMA

Mailchimp Campaign

18 properties

JSON SCHEMA

AccountStats

10 properties

JSON SCHEMA

AllowlistEntry

3 properties

JSON SCHEMA

DedicatedIP

6 properties

JSON SCHEMA

Error

4 properties

JSON SCHEMA

ExportJob

6 properties

JSON SCHEMA

IPPool

3 properties

JSON SCHEMA

MessageContent

11 properties

JSON SCHEMA

MessageDetail

0 properties

JSON SCHEMA

MessageInfo

13 properties

JSON SCHEMA

MessagePayload

32 properties

JSON SCHEMA

MetadataField

3 properties

JSON SCHEMA

ParsedMessage

9 properties

JSON SCHEMA

RejectEntry

9 properties

JSON SCHEMA

ScheduledMessage

6 properties

JSON SCHEMA

SenderDomain

7 properties

JSON SCHEMA

SenderInfo

12 properties

JSON SCHEMA

SendResult

5 properties

JSON SCHEMA

SubaccountInfo

11 properties

JSON SCHEMA

TagInfo

12 properties

JSON SCHEMA

TemplateInfo

17 properties

JSON SCHEMA

TimeSeries

11 properties

JSON SCHEMA

AccountStats

10 properties

JSON SCHEMA

AllowlistEntry

3 properties

JSON SCHEMA

DedicatedIP

6 properties

JSON SCHEMA

Error

4 properties

JSON SCHEMA

ExportJob

6 properties

JSON SCHEMA

IPPool

3 properties

JSON SCHEMA

MessageContent

11 properties

JSON SCHEMA

MessageDetail

0 properties

JSON SCHEMA

MessageInfo

13 properties

JSON SCHEMA

MessagePayload

32 properties

JSON SCHEMA

MetadataField

3 properties

JSON SCHEMA

ParsedMessage

9 properties

JSON SCHEMA

RejectEntry

9 properties

JSON SCHEMA

ScheduledMessage

6 properties

JSON SCHEMA

SendResult

5 properties

JSON SCHEMA

SenderDomain

7 properties

JSON SCHEMA

SenderInfo

12 properties

JSON SCHEMA

SubaccountInfo

11 properties

JSON SCHEMA

TagInfo

12 properties

JSON SCHEMA

TemplateInfo

17 properties

JSON SCHEMA

TimeSeries

11 properties

JSON SCHEMA

UserInfo

7 properties

JSON SCHEMA

WebhookInfo

10 properties

JSON SCHEMA

UserInfo

7 properties

JSON SCHEMA

WebhookInfo

10 properties

JSON SCHEMA

Mailchimp List Member

32 properties

JSON SCHEMA

Mailchimp Template

17 properties

JSON SCHEMA

Scroll within the panel for all 50 ·

JSON Structure 24

JSON Structure captures the data shapes in a form built for tooling — a complement to JSON Schema that keeps the model machine-legible.

JSON Structure definitions describing this provider's data shapes.

Mailchimp Structure

0 properties

JSON STRUCTURE

Mailchimp Transactional Error Structure

4 properties

JSON STRUCTURE

Mailchimp Transactional Ip Pool Structure

3 properties

JSON STRUCTURE

Mailchimp Transactional Tag Info Structure

12 properties

JSON STRUCTURE

Scroll within the panel for all 24 ·

Examples 89

Real request and response payloads are what turn a spec from abstract into obvious — and they're one of the twelve things an agent needs to call an API correctly on the first try.

Example request and response payloads for these APIs.

Scroll within the panel for all 89 ·

Security Posture 4

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.

Mailchimp Authentication

apiKey/http/oauth2 · 3 schemes

SECURITY

Mailchimp Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Mailchimp Vulnerability Disclosure

security.txt · contact published

SECURITY

Mailchimp Trust Center

SOC 2, ISO 27001, EU-U.S. Data Privacy Framework (incl. UK Extension and Swiss-U.S. DPF), GDPR, VPAT (Section 508 accessibility)

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.

Mailchimp Agentic Access

338 operations · 196 acting

338 operations · 196 acting

AGENTIC

Resources

Every other property we hold for Mailchimp — 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.

Documentation 3

Reference material describing how the API behaves

Company 3

The organization behind the API

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

Where this information came from

This is an independent, third-party profile of Mailchimp, 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.