Marketing Automation · Integration
Mailjet
Add Mailjet to your product for your customers, and give your AI agents governed access to it.
Mailjet does both campaign and transactional sending on one account, which is genuinely useful and also the thing to be careful about, because the two have different reputation consequences and Mailjet keeps them separable rather than merged. Contacts belong to lists and carry properties used for segmentation, so the integration worth building is usually contact and list maintenance driven by what happens in your product. Templates are stored server-side and rendered on send. Engagement comes back as events, and the useful ones are the negative signals: bounces and spam complaints tell you what to stop sending. fastn scopes each customer's key pair to them.
In your product
Embedded for your customers. Per-tenant auth, no per-customer code, maintained by fastn.
Let a customer connect their own Mailjet account so email runs on their sending reputation.
Maintain contacts and lists from your product rather than through periodic imports.
Send a campaign or a transactional message using their server-side templates.
Read bounce and complaint events so your product stops mailing addresses that failed.
For your AI agents
Governed, audited access for the agents you build, through the MCP server.
An agent reports campaign performance and which segments engaged.
An agent adds a contact to a list within governed permissions, with the write audited per tenant.
An agent explains why deliverability dropped by reading recent bounce reasons.
Example prompt
How did the last campaign perform, and which addresses bounced?
Set up Mailjet in 4 steps
- 01Enable the Mailjet connector from your fastn dashboard.
- 02Have each customer authorise their own Mailjet account, so calls run under their credentials rather than a shared key.
- 03Decide which campaigns, segments and subscribers your product needs, map those fields, then enable the actions and triggers you want.
- 04Call it from your product and expose it to your agents through the same governed connection.
Why teams use the Mailjet integration
What you get by embedding it with fastn instead of building it yourself.
- Ship a Mailjet integration without building it. Your customers connect their own Mailjet account inside your product and work their campaigns, segments and subscribers there, with no per-customer code on your side.
- Handle the part that actually costs time: engagement data arrives as a high-volume event stream, so ordering and deduplication matter. fastn owns the auth, token refresh, rate limits, pagination and breaking-change fixes, so a Mailjet update is not your on-call problem.
- One integration serves your product and your agents. The same governed Mailjet connection powers in-product features and gives AI agents scoped, audited access, so you trigger and measure campaigns from inside your product without wiring it twice.
Used by these teams
Compare with
Mailchimp
SendGrid
BrevoOften used alongside
Tools the same teams tend to run next to Mailjet, across other categories.
Salesforce
HubSpot
Pipedrive
Zoho CRMMailjet integration FAQ
How do I add a Mailjet integration to my product?
Enable the Mailjet connector in your fastn dashboard, then let each customer authenticate their own Mailjet account. fastn handles the OAuth flow, token storage and refresh per tenant, so there is no Mailjet client code in your app and no per-customer branch in your codebase. Setup is 4 steps.
Do my customers each connect their own Mailjet account?
Yes. Every connection is scoped to the individual customer, so each authorises their own Mailjet account and only ever sees their own campaigns, segments and subscribers. That per-tenant isolation is the point of an embedded integration: you support the long tail of customer setups without maintaining an integration per customer.
Can AI agents use this Mailjet integration?
Yes. The same connection is exposed to your agents through the fastn MCP gateway, with permissions scoped per tenant and every call audited. An agent reports campaign performance and which segments engaged.
Who maintains the Mailjet integration?
fastn does. When Mailjet changes an endpoint, deprecates a field or alters its auth, the fix lands in the connector rather than in your backlog, and your customers' connections keep working.
Can I trigger a Mailjet campaign from an event in my product?
Yes. Product events can start a campaign, add a contact to a segment, or enrol someone in a journey, so lifecycle messaging follows what a user actually did rather than a nightly export.
Can I read engagement results back from Mailjet?
Yes. Results come back scoped per tenant, so your product can act on them without one customer's data mixing with another's. What you get depends on the channel: opens, clicks, bounces and unsubscribes where there are sends, and impressions, spend and conversions where there are campaigns.
What can I build with the Mailjet integration?
A common starting point: let a customer connect their own Mailjet account so email runs on their sending reputation. Teams also use it for the other use cases listed above, and expose it to agents for governed reads and writes.
How much does the Mailjet integration cost?
It is included. Pricing is based on connected accounts, not on how many connectors you enable, so adding Mailjet does not change your per-connector cost. You can start free with 3 connected accounts.
Add Mailjet to your product
Start free with 3 connected accounts. No sales call required, and no per-customer integration code.