ListBridge Sync for Constant Contact and MemberPress
Sync MemberPress members to Constant Contact lists on signup, renewal, or expiry via the OAuth2-secured Constant Contact v3 API.
Use with caution
ListBridge Sync for Constant Co… works, but test it on a staging site before relying on it in 2026. Was last updated 4 months ago, and scores 49/100 on our health check.
- Small user base (<10 active installs)
- Very few reviews so far
How does it stack up?
Side-by-side on installs, updates, ratings & support
Daily downloads
Download spikes usually follow a new release — each site that auto-updates counts as a download.
Rankings
Where ListBridge Sync for Constan… stands todayWordPress.org search rankings
Live position in the plugin search, top 100| Keyword | Position |
|---|---|
| constant contact | #93 |
| Email Marketing | >100 |
| integration | >100 |
| memberpress | >100 |
| membership | >100 |
About ListBridge Sync for Constant Contact an…
From the official readme · v1.0.0Description
ListBridge Sync for Constant Contact and MemberPress connects MemberPress membership events to your Constant Contact account so subscribers move between contact lists based on their membership state — without exporting CSVs or running manual syncs.
This is an independent integration. “Constant Contact” is a trademark of Constant Contact, Inc. and “MemberPress” is a trademark of Caseproof, LLC. This plugin is not affiliated with, endorsed by, or sponsored by either company.
Key features
- OAuth2 Authorization Code flow
- Three event slots, each mapped to a Constant Contact list of your choice:
- New Member Signup — added when a member registers and pays for the first time.
- Membership Expired — added when a membership expires or a subscription is cancelled.
- Reactivated / Renewed — added when an expired membership is renewed or a cancelled subscription is reactivated.
- Cron at Midnight (site timezone) catches any expired members the real-time hooks may have missed — for example, if your site was offline when MemberPress fired the event.
- Admin-triggered status changes (Transactions list, Edit Transaction screen, bulk status updates) are detected and synced.
- Automatic access-token refresh before every API call — you never hit a 401.
- Translation-ready with a
.potfile in/languages.
Requirements
- WordPress 5.8 or later
- PHP 7.4 or later
- PHP OpenSSL extension (the plugin will refuse to activate without it)
- MemberPress 1.12.14 or later
- A Constant Contact developer account — create one for free at https://developer.constantcontact.com
External services
This plugin relies on the Constant Contact service to synchronise your MemberPress members with your Constant Contact account. No data is transmitted until a site administrator saves valid OAuth2 credentials on the plugin’s settings page and completes the OAuth2 connection flow.
Service used
- Constant Contact (operated by Constant Contact, Inc.)
- OAuth2 authorisation endpoint:
https://authz.constantcontact.com/oauth2/default/v1 - API endpoint:
https://api.cc.email/v3
What data is sent, and when
- During OAuth2 connect / token refresh — your Constant Contact Client ID and Client Secret are sent to the Constant Contact authorisation endpoint to obtain or refresh an access token. This happens when an administrator clicks “Connect to Constant Contact” and automatically before any API call whose access token has expired.
- When a MemberPress member signs up (
mepr-signup) — the member’s email address, first name, and last name are sent to Constant Contact so the contact can be added to the list mapped to the “New Member Signup” slot. - When a membership expires or a subscription is cancelled (
mepr-event,mepr-expire-membership,mepr-subscription-pre-cancel,mepr_txn_store,mepr-transaction-saved,mepr_txn_transition_status) — the member’s email, first name, and last name are sent so the contact can be moved to the list mapped to the “Membership Expired” slot. - When an expired membership is renewed or reactivated (
mepr-transaction-completed,mepr-event) — the member’s email, first name, and last name are sent so the contact can be moved to the list mapped to the “Reactivated / Renewed” slot. - Nightly cron at 12:05 AM in the site’s timezone — the plugin queries MemberPress for transactions that expired in the last 48 hours and, for any that have not yet been migrated, sends the same fields (email, first name, last name) so Constant Contact stays in sync if a real-time hook was missed (for example, the site was offline).
- When loading the settings page (administrators only) — the plugin requests the list of contact lists in your Constant Contact account so they can be shown in the mapping dropdowns. No member data is sent in this call. The response is cached for 30 minutes.
The plugin does not transmit any data to any other third-party service.
Terms and privacy
By connecting your site to Constant Contact you agree to Constant Contact’s policies:
- Constant Contact Terms of Service: https://www.constantcontact.com/legal/terms
- Constant Contact Privacy Notice: https://www.constantcontact.com/legal/privacy-notice
- Constant Contact Developer Portal terms: https://developer.constantcontact.com
Installation
- Upload the plugin folder to
/wp-content/plugins/, or install via Plugins → Add New → Upload Plugin. - Activate the plugin from Plugins → Installed Plugins.
- Navigate to MemberPress → Constant Contact in the WordPress admin.
Setup
Step 1 — Create a Constant Contact application
- Go to https://developer.constantcontact.com and sign in (or create a free developer account).
- Under My Applications, click New Application.
- Give it a name (for example “My WordPress Site”) and click Save.
- Copy the API Key (Client ID).
- Click Generate Client Secret and copy the secret — it is only shown once.
- Add a Redirect URI: copy the exact value shown on the plugin’s settings page (for example
https://yoursite.com/wp-admin/admin-post.php?action=mp_cc_oauth_callback).
Step 2 — Save credentials
- Paste the Client ID and Client Secret into the plugin’s settings page.
- Click Save Credentials.
Step 3 — Authorise access
- Click Connect to Constant Contact.
- Log in to Constant Contact and grant access.
- You will be redirected back to the settings page with a “Connected” confirmation.
Step 4 — Map contact lists
- Three dropdowns appear once you are connected.
- Pick a Constant Contact list for each event slot.
- Click Save List Mappings.
Frequently asked questions
Do I need a paid Constant Contact developer account?
No. The free developer tier is enough to create the application that holds your Client ID and Client Secret. A paid Constant Contact subscription is only required to actually send marketing emails to the lists you sync to.
Where are my credentials stored?
Inside the standard WordPress options table, encrypted with AES-256-CBC. The encryption key is derived from your site’s AUTH_KEY, so a database leak alone is not enough to recover the credentials.
What happens when an access token expires?
The plugin stores the expires_at timestamp and refreshes the access token automatically (using the saved refresh token) before every API call.
What if my site is offline when a membership expires?
A nightly cron job runs at 12:05 AM in your site’s timezone and looks back 48 hours for any expired transactions whose contact has not yet been migrated to the expired list. Members caught by the safety net are processed exactly once.
Can I sync Constant Contact custom fields?
No. Currently this functionality not available. We will add in our road map if many users will ask for that.
Does deleting the plugin clean up my database?
Yes. uninstall.php removes every option and transient the plugin created when you delete it via Plugins → Delete (not just deactivate).
Which MemberPress events trigger a sync?
mepr-signup — new member completes signup mepr-event — generic event bus (expired, renewed, cancelled) mepr-transaction-completed — renewal transaction mepr-subscription-pre-cancel — subscription cancelled mepr-expire-membership — natural membership expiry mepr_txn_store, mepr-transaction-saved, mepr_txn_transition_status — admin-triggered status changes
Why does the plugin require the OpenSSL extension?
So that we can store your Constant Contact credentials encrypted at rest with AES-256-CBC. OpenSSL ships with PHP by default; if your host has disabled it, please ask them to enable it before activating the plugin.
How do I enable the debug log?
On the settings page, open the Debug Settings card and tick Enable debug log. Logs are written to wp-content/uploads/mp-cc-logs/mp-cc-YYYY-MM-DD.log and protected from direct web access by an index.php and an .htaccess file.
Changelog
1.0.0 — 2026-06-05
- Initial release.
- OAuth2 Authorization Code flow with automatic token refresh.
- Three event slots: New Member Signup, Membership Expired, Reactivated / Renewed.
- cron at Midnight (site timezone).
- OpenSSL is a hard requirement.
- Translation-ready.
Screenshots
For developers
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FAQ
ListBridge Sync for Constant Contac…: quick answers
Straight answers, pulled from live WordPress.org data.
Live data from WordPress.org · checked Oct 19, 2026
Is ListBridge Sync for Constant Co… free?
Yes. ListBridge Sync for Constant Co… is free to download and use from the official WordPress.org plugin directory.
Is ListBridge Sync for Constant Co… safe to use in 2026?
ListBridge Sync for Constant Co… works, but test it on a staging site before relying on it in 2026. Was last updated 4 months ago, and scores 49/100 on our health check.
How many websites use ListBridge Sync for Constant Co…?
ListBridge Sync for Constant Co… is active on <10 WordPress websites and has been downloaded 224 times since it launched in June 2026. It was downloaded 63 times in the last 30 days.
Does ListBridge Sync for Constant Co… work with WordPress 7.1?
ListBridge Sync for Constant Co… is officially tested up to WordPress 7.0.7, while the latest release is 7.1.3. It may still work, but try it on a staging site first.
What PHP version does ListBridge Sync for Constant Co… need?
ListBridge Sync for Constant Co… requires PHP 7.4 or higher. Most hosts run PHP 8.x today, so it works on any modern WordPress hosting.
When was ListBridge Sync for Constant Co… last updated?
The latest version, 1.0.0, was released on June 16, 2026 (4 months ago).
Who makes ListBridge Sync for Constant Co…?
ListBridge Sync for Constant Co… is developed and maintained by WpExpertPlugins.
What are the best alternatives to ListBridge Sync for Constant Co…?
The most popular alternatives to ListBridge Sync for Constant Co… are Constant Contact Forms (20K+ installs), Gravity Forms Constant Cont… (3K+ installs) and Constant Contact Forms by M… (2K+ installs).
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