Free form backend
for AI agents

Unlimited submissions. Unlimited forms. Your AI agent builds the form, Spike handles the rest.

How it works

Three steps. No backend.

Step 1

Create your endpoint

Sign up and get a unique form URL in under 30 seconds. No code, no configuration, no server setup. Just a URL that's ready to receive data.

+ New Form
Step 2

Tell your AI agent

Give your AI the endpoint URL. It generates the form markup and points submissions straight to Spike.

Contact FormEmail CollectionMulti-step FormFeedback SurveyOrder Form

Works with

OpenClawLovableBoltv0CursorClaudeChatGPTLindo AIReplitBase44OpenCode
Step 3

Collect everything

Every submission lands in your Spike dashboard. Get email alerts, send auto-replies, forward data via webhooks, and export anytime.

Email Notifications

Instant alerts on every submission

Webhooks

POST data to your server in real time

Auto Responder

Send confirmation emails automatically

Features

Everything your form needs

Email Notifications

Get notified instantly on every new submission. Configure a primary email address and add as many additional recipients as you need. Never miss a lead.

Enable Notifications

Primary Email

you@company.com

Additional Recipients

team@company.com, alerts@company.com

Auto Responder

Send automatic confirmation emails to the person who submitted your form. Customize the message, personalize it with form data, and toggle it on or off anytime.

Enable Auto-Responder

Subject

Thanks for reaching out!

Message

Hi {{name}}, we received your message and will get back to you within 24 hours.

Redirect & Security

Redirect users to a custom URL after they submit your form. Lock submissions to specific domains to prevent unauthorized use of your endpoint.

Redirect URL

https://yoursite.com/thank-you

Allowed Domains

yoursite.com, app.yoursite.com

Webhooks

POST submission data to your own server or any third-party service in real time. Get a JSON payload with every field the moment someone submits.

Enable Webhook

Endpoint URL

https://yoursite.com/webhook

Method

POST

Pricing

Free forever. Seriously.

Unlimited submissions and forms. No credit card required.

Free

Everything you need to get started

$0forever
  • Unlimited submissions
  • Unlimited forms
  • File uploads (10MB per submission)
  • Email notifications
  • Webhooks & API access
  • Dashboard & exports
  • Custom redirects

Pro

For power users and teams

$9.99per month

or $100/year save 20%

Everything in Free, plus:

  • Auto-responder emails
  • Form analytics dashboard
  • Switch between organizations
  • Priority support

Free plan is subject to our fair usage policy. No credit card required.

Your AI builds forms.
Spike makes them work. Free.

Unlimited submissions. Unlimited forms. No credit card needed.