Developer docs · InboxRatio Editorial

Mailchimp email API: SDKs, docs and limits (2026)

Every link below points into Mailchimp's official developer documentation and was checked on 10 September 2026. We record only what the vendor documents — a field we could not verify at the source is left out, never guessed.

From Mailchimp's official docs · checked 10 September 2026

Docs, SDKs and limits

Developer docs: mailchimp.com/developer/
API reference: mailchimp.com/developer/marketing/api/
SDK languages: Node.jsPHPPythonRubyAs listed in Mailchimp's official SDK docs
SMTP relay: Yes — via Mailchimp Transactional (Mandrill) · SMTP docs
Webhooks: Webhook docs
Rate limits: The Marketing API allows 10 simultaneous connections; requests beyond that return HTTP 429, and every call has a 120-second timeout. Source
Pricing page: mailchimp.com/pricing/marketing/?currency=USD

From our feature matrix — documented by the vendor

API, SMTP and sending auth

APIMarketing API account-level on all plans; capability varies by plan
SDKs / client libraries'Mailchimp's API client libraries and mobile SDKs' — PHP, Node, Python, Ruby (Marketing + Transactional APIs), iOS and Android SDKs
Public API docs'API docs' public at mailchimp.com/developer
Webhooks'use webhooks to track message events in real time'
SMTP APISMTP only via paid Transactional add-on
SMTP relayOnly via Mailchimp Transactional add-on: 'send transactional emails using the Transactional API or SMTP integration'
Transactional emailSeparate paid add-on: 'Mailchimp Transactional is priced by email send volume. Pricing starts at $20 per block'
SPF assistanceSPF named only on Transactional page ('SPF, DKIM, and DMARC to verify your sender identity'); marketing domain-auth article covers DKIM/DMARC records
DKIM setup'Create a new DKIM record... copy and paste 2 CNAME records'
DMARC support'Create a new DMARC record... one TXT record' — setup guidance

Features checked 10 September 2026. ✓ documented · ◐ limited or plan-gated · × documented as absent · — not documented. Documentation is not a measured result — see our methodology.

Pricing snapshot

Paid Mailchimp plans start at $27/mo (Essentials), checked 19 August 2026. Full Mailchimp pricing by volume

Generated from our datasets — every value verified and dated

Frequently asked questions

Where are the official Mailchimp API docs?

Mailchimp's official developer documentation is at https://mailchimp.com/developer/, and the API reference is at https://mailchimp.com/developer/marketing/api/. Links checked on 10 September 2026.

Does Mailchimp have an SDK for Python?

Yes. Python is among the SDK languages listed in Mailchimp's official docs: Node.js, PHP, Python and Ruby (checked 10 September 2026).

Does Mailchimp support SMTP relay?

Yes. Mailchimp's official docs document SMTP relay sending (via Mailchimp Transactional (Mandrill)): https://mailchimp.com/developer/transactional/docs/smtp-integration/ (checked 10 September 2026).

What are the Mailchimp API rate limits?

The Marketing API allows 10 simultaneous connections; requests beyond that return HTTP 429, and every call has a 120-second timeout. Source: Mailchimp's official documentation at https://mailchimp.com/developer/marketing/docs/fundamentals/, checked 10 September 2026.

Does Mailchimp offer webhooks?

Yes. Mailchimp's official docs cover webhook event notifications: https://mailchimp.com/developer/marketing/guides/sync-audience-data-webhooks/ (checked 10 September 2026).