Marketing Automation · Integration
Campayn
Add Campayn to your product for your customers, and give your AI agents governed access to it.
Campayn is an email marketing tool for small businesses, and its API sits on a separate host at api.campayn.com under an /api/v1/ prefix, with resources addressed using a .json suffix in the path rather than an Accept header. The api subdomain also serves the marketing site, so a request to the bare host redirects to www.campayn.com and returns HTML, which makes host reachability a poor test of whether your path is right. The API is scoped to contacts, lists and reporting statistics rather than campaign creation, so you can manage who receives mail and read what happened, but composing and sending a campaign remains a job for the Campayn interface. There is no published OpenAPI document; the vendor points developers at a community PHP wrapper on GitHub, so field names are best confirmed against live responses. Responses are slow enough on some endpoints that a default two second client timeout will fail spuriously. fastn holds each customer's Campayn credentials, sets sensible timeouts, and keeps the connection maintained as the API changes.
In your product
Embedded for your customers. Per-tenant auth, no per-customer code, maintained by fastn.
Let a customer connect their own Campayn account so contacts created in your product are added to the right Campayn list.
Keep unsubscribes and bounces flowing back so your product never shows a contact as mailable when Campayn has suppressed them.
Segment contacts in your app and push each segment to a dedicated Campayn list for the customer to mail.
Surface open and click statistics from Campayn reports inside your own customer dashboard.
For your AI agents
Governed, audited access for the agents you build, through the MCP server.
Let an agent add a contact to a named list and report the result, with the list, the contact and the tenant written to a per-tenant audit log.
Have an agent pull report statistics for a recent send and summarise open and click rates.
Let an agent reconcile a list against your product's records and report contacts present in one system only.
Example prompt
How did our last Campayn newsletter perform, and which contacts are on the customer list but not in our app?
Set up Campayn in 4 steps
- 01Enable the Campayn connector from your fastn dashboard.
- 02Have each customer authorise their own Campayn 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 Campayn integration
What you get by embedding it with fastn instead of building it yourself.
- Ship a Campayn integration without building it. Your customers connect their own Campayn 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 Campayn update is not your on-call problem.
- One integration serves your product and your agents. The same governed Campayn 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
Marketo
Google AdsOften used alongside
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Salesforce
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Pipedrive
Zoho CRMCampayn integration FAQ
How do I add a Campayn integration to my product?
Enable the Campayn connector in your fastn dashboard, then let each customer authenticate their own Campayn account. fastn handles the OAuth flow, token storage and refresh per tenant, so there is no Campayn client code in your app and no per-customer branch in your codebase. Setup is 4 steps.
Do my customers each connect their own Campayn account?
Yes. Every connection is scoped to the individual customer, so each authorises their own Campayn 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 Campayn integration?
Yes. The same connection is exposed to your agents through the fastn MCP gateway, with permissions scoped per tenant and every call audited. Let an agent add a contact to a named list and report the result, with the list, the contact and the tenant written to a per-tenant audit log.
Who maintains the Campayn integration?
fastn does. When Campayn 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 Campayn 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 Campayn?
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 Campayn integration?
A common starting point: let a customer connect their own Campayn account so contacts created in your product are added to the right Campayn list. 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 Campayn integration cost?
It is included. Pricing is based on connected accounts, not on how many connectors you enable, so adding Campayn does not change your per-connector cost. You can start free with 3 connected accounts.
Add Campayn to your product
Start free with 3 connected accounts. No sales call required, and no per-customer integration code.