Subscriptions API with Trials and Setup Fees

A subscriptions API for teams that need plans, hosted signup, trials, setup fees, and subscription lifecycle in one API surface.

Flint subscription plans support setup fees, trial periods, contract terms, and early termination fields directly on the public plan model.

Hosted signup, direct subscription creation, and saved payment methods fit the same recurring billing system instead of splitting checkout from billing logic.

The subscription surface keeps recurring lifecycle connected to the broader payment, order, and customer model.

Workflow Outline

You need recurring plans with delayed starts, setup fees, and lifecycle behavior that belongs on the plan model itself.

Your product wants hosted signup or direct API creation without splitting plan configuration from recurring billing behavior.

You need setup fees, trials, and later recurring charges to stay inside the same subscription system.

What This Solves

Teams searching subscription APIs with trials and setup fees usually need recurring billing primitives that can model onboarding fees, delayed starts, and contract-aware plans without custom billing glue.

Step 1

Onboarding-heavy SaaS plans

Charge a setup fee now, then start the recurring plan later without splitting the first payment into a separate invoice flow.

Step 2

Free-trial conversion

Delay the first recurring charge with a trial period while keeping the whole plan definition on the public subscription-plan model.

Step 3

Hosted subscription signup

Use hosted signup or payment-link flows while still relying on the same plan fields for setup fees and trial behavior.

Step 4

Contract-aware recurring billing

Model setup fees, trial periods, contract terms, and later billing behavior in one recurring system instead of bolting them together manually.

Why Flint Fits

Flint subscription plans support setup fees, trial periods, contract terms, and early termination fields directly on the public plan model.

Hosted signup, direct subscription creation, and saved payment methods fit the same recurring billing system instead of splitting checkout from billing logic.

The subscription surface keeps recurring lifecycle connected to the broader payment, order, and customer model.

Choose Another Path When

Use invoice-led billing when the workflow is receivables-driven rather than recurring plan-driven.

Use one-time payment surfaces when recurring lifecycle and saved payment methods are not part of the requirement.

Use the broader subscription page when the decision extends beyond trials and setup fees into Flint's whole recurring model.

Implementation References

Reference the exact flow surfaces

Subscription Plans API

Create reusable plans with setup fees, trial periods, contract terms, and early termination fields.

Subscriptions API

Create and manage subscriptions, billing state, and lifecycle actions.

Subscription Billing Guide

Guide for saved payment methods, subscription signup, and recurring billing behavior.

Explore recurring billing, saved methods, and later-charge workflows

These pages connect subscription plan design to Flint's broader recurring billing and payment model.

Subscription API

Go broader when the real question is Flint's entire recurring billing model, not just trials and setup fees.

Saved Payment Methods API for Platforms

Useful when recurring billing also depends on stored payment methods and default-payment setup.

Off-Session Payments API

Use this when the key issue is background charging and later billing rather than plan configuration itself.

Next Step

Ship the workflow before polishing the edge cases

Start with the underlying Flint flow, then layer your product-specific UX and recovery paths on top.