Content & Documents · Integration
APITemplate.io
Add APITemplate.io to your product for your customers, and give your AI agents governed access to it.
APITemplate.io renders PDFs and images from templates you design once and then fill with JSON, calling POST /v2/create-pdf?template_id=... or /v2/create-image with an X-API-KEY header. Templates are HTML or Word based and use expression syntax for loops and conditionals, so line-item tables come from arrays in the payload rather than from repeated calls. The constraint that surprises people is regional hosting: accounts are pinned to a region and requests must go to the matching host, so calling rest.apitemplate.io with a key issued in another region fails authentication even though the key is valid. Generated files are stored and served from a CDN URL with a retention window, and /v2/list-objects enumerates what has been produced, so anything you need permanently must be copied into your own storage. There is also a direct HTML-to-PDF path for cases where no stored template exists. fastn holds each customer's key and region, keeps the connection working and governs which templates an agent may render.
In your product
Embedded for your customers. Per-tenant auth, no per-customer code, maintained by fastn.
Let a customer connect their own APITemplate.io account so invoices and certificates render against their own templates and quota.
Generate a branded PDF from your application data and attach the returned file URL to a record.
Produce social or Open Graph images from a template whenever a customer publishes new content.
List previously generated objects so a customer can retrieve a document again without re-rendering it.
For your AI agents
Governed, audited access for the agents you build, through the MCP server.
Let an agent render an approved template with a validated data payload and return the file link, with each render and its template id audited per tenant.
Have an agent check whether a document already exists in the object list before spending a render.
Allow an agent to read generated objects but not to edit or delete stored templates.
Example prompt
Generate the monthly invoice PDF for this customer from our standard template.
Set up APITemplate.io in 4 steps
- 01Enable the APITemplate.io connector from your fastn dashboard.
- 02Have each customer authorise their own APITemplate.io account, so calls run under their credentials rather than a shared key.
- 03Decide which files, documents and versions 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 APITemplate.io integration
What you get by embedding it with fastn instead of building it yourself.
- Ship an APITemplate.io integration without building it. Your customers connect their own APITemplate.io account inside your product and work their files, documents and versions there, with no per-customer code on your side.
- Handle the part that actually costs time: permissions and versioning are easy to get subtly wrong, and mistakes expose content. fastn owns the auth, token refresh, rate limits, pagination and breaking-change fixes, so an APITemplate.io update is not your on-call problem.
- One integration serves your product and your agents. The same governed APITemplate.io connection powers in-product features and gives AI agents scoped, audited access, so you let your product work with your customers' documents in place without wiring it twice.
Used by these teams
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AsanaAPITemplate.io integration FAQ
How do I add an APITemplate.io integration to my product?
Enable the APITemplate.io connector in your fastn dashboard, then let each customer authenticate their own APITemplate.io account. fastn handles the OAuth flow, token storage and refresh per tenant, so there is no APITemplate.io client code in your app and no per-customer branch in your codebase. Setup is 4 steps.
Do my customers each connect their own APITemplate.io account?
Yes. Every connection is scoped to the individual customer, so each authorises their own APITemplate.io account and only ever sees their own files, documents and versions. 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 APITemplate.io 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 render an approved template with a validated data payload and return the file link, with each render and its template id audited per tenant.
Who maintains the APITemplate.io integration?
fastn does. When APITemplate.io 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.
Whose permissions does the APITemplate.io integration run under?
Each customer's own APITemplate.io grant. Where APITemplate.io holds a library, their existing folder and item permissions apply and your product cannot reach content the connected account could not reach itself. Where it processes content you supply rather than storing it, the call runs under that customer's own credentials and is logged per tenant.
Can my product create or update content in APITemplate.io automatically?
Where APITemplate.io supports writes, documents, entries and assets can be created, updated and filed from your product or by an agent within scoped permissions, with each action logged. Where it is a read surface, the same connection serves reads only.
What can I build with the APITemplate.io integration?
A common starting point: let a customer connect their own APITemplate.io account so invoices and certificates render against their own templates and quota. 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 APITemplate.io integration cost?
It is included. Pricing is based on connected accounts, not on how many connectors you enable, so adding APITemplate.io does not change your per-connector cost. You can start free with 3 connected accounts.
Add APITemplate.io to your product
Start free with 3 connected accounts. No sales call required, and no per-customer integration code.