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The Spike API allows you to submit forms, retrieve submissions, and manage your forms programmatically.

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Base URL

https://spike.ac/api

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Authentication

Most endpoints require authentication via API key. Include your key in the Authorization header: 
Authorization: Bearer YOUR_API_KEY
Get your API key from the dashboard settings.

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Content Types

The API accepts and returns JSON by default. For form submissions, you can also use:
  • application/json
  • application/x-www-form-urlencoded
  • multipart/form-data (for file uploads)

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Response Format

All responses are JSON: 
// Success
{
  "success": true,
  "data": { ... }
}

// Error
{
  "error": "Error message",
  "code": "ERROR_CODE"
}

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Rate Limits

PlanRequests/minute
Free60
Pro300
Business1000
EnterpriseCustom
Rate limit headers are included in responses: 
X-RateLimit-Limit: 60
X-RateLimit-Remaining: 59
X-RateLimit-Reset: 1640000000

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Endpoints Overview

MethodEndpointDescription
POST/f/{slug}Submit form
GET/forms/{id}/submissionsGet submissions
GET/formsList forms
POST/formsCreate form
PATCH/forms/{id}Update form
DELETE/forms/{id}Delete form