AI API

Spondyr

API to generate and deliver template-driven correspondence from your app with one call

spondyr.io

Verified API available Works with n8n Free tier

Quick facts
What is it	API to generate and deliver template-driven correspondence from your app with one call
Pricing	Freemium — from $19/mo
Free tier	Yes
Platform	API
API	Yes
Works with	n8n
Best for	generating invoices and receipts, sending personalized welcome emails
Domain registered	2017

Data updated Aug. 1, 2026

What does Spondyr do?

Spondyr is an API that lets you generate and deliver template-driven correspondence straight from your application. With a single RESTful API call, you can turn user activity — like a purchase or signup — into a formatted document and send it automatically. It handles the boring parts of content creation so your app can output consistent, branded communications without manual work.

The API works by accepting dynamic data and merging it into predefined templates. You define the templates (invoices, welcome emails, confirmation letters) and Spondyr renders them on demand. The system is designed to be simple: no complex integrations, just send the right parameters and get the output. It supports a free developer plan so you can test the flow before scaling.

Spondyr is built for developers and product teams who want to add automated correspondence features quickly. Use it to send invoices after purchases, generate welcome emails for new users, or produce contract documents. It saves time compared to building document generation from scratch and ensures every message stays on-brand.

AI API Developer Tools LLM

#api#content generation#correspondence#developer tools#document generation#rest api#template-driven

Key features

What makes it stand out

Single API call to generate and send template-based documents

RESTful API integrates with any application

Supports dynamic content based on user activity

Free developer plan available

Automates repetitive correspondence like invoices and welcome emails

Who is Spondyr for?

Who benefits most from this tool

generating invoices and receipts

sending personalized welcome emails

creating automated contract letters

Pricing

Free tier available — start without a credit card

Developer

Free

50 monthly correspondence limit
1 admin user
1 application key
5 rules

Start-Up

$19.0/month

5,000 monthly correspondence limit
2 admin users
1 application key
20 rules

Growth

$99.0/month

50,000 monthly correspondence limit
5 admin users
25 application keys
Unlimited rules
White-Label Viewer

Small Business

$299.0/month

100,000 monthly correspondence limit
10 admin users
100 application keys
Unlimited rules

Enterprise

Custom

Custom monthly correspondence limit
Unlimited admin users
Unlimited application keys
Unlimited rules
Private Storage, Multi-Tenant Support

Trust & presence

Domain Domain registered 2017

Gallery

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