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Base URL

https://api.plexospay.com

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Authentication

All requests require a Bearer token: 
Authorization: Bearer sk_test_YOUR_API_KEY

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Response Format

Successful responses return the resource directly as JSON. Error responses use this format: 
{
  "error": {
    "message": "Payment not found",
    "code": "NOT_FOUND"
  }
}

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HTTP Status Codes

CodeDescription
200Success
204No content
400Validation error
401Invalid API key
403Insufficient permissions
404Resource not found
409Conflict (duplicate, state error)
429Rate limit exceeded
500Server error

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Pagination

List endpoints use cursor-based pagination: 
GET /v1/payments?limit=20&starting_after=pi_abc123
ParameterDescription
limitMax items per page (1-100, default 20)
starting_afterID of the last item from the previous page
Responses include: 
{
  "data": [...],
  "hasMore": true
}

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Idempotency

Payment and refund creation support idempotency: 
POST /v1/payments
Idempotency-Key: unique-request-id-123
If you retry with the same key, you’ll get the original response.