Score Signup

Analyze signup data and returns a trust score from 0-100 with detailed reasoning and risk classification.

POST/score-signup🔒 Auth Required

Analyzes signup data using 4 parallel processors (Email Intelligence, Network Analysis, Velocity Checks, Device Fingerprint) and returns a weighted trust score.

Request Body

Parameter	Type	Required	Description
`email`	string	Required	The email address to analyze
`ip_address`	string	Required	The IP address of the signup attempt
`user_agent`	string	Optional	Browser user agent string

Request Example

cURL

curl -X POST https://api.siftlyapi.com/score-signup \
  -H "Content-Type: application/json" \
  -H "X-API-Key: YOUR_API_KEY" \
  -d '{
    "email": "jane.smith@company.com",
    "ip_address": "203.0.113.1",
    "user_agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7)"
  }'

Response

Returns a JSON response with trust score and analysis:

200 OK — Low Risk

1{
2  "trust_score": 95,
3  "risk_level": "low",
4  "reasons": [
5    {
6      "factor": "email",
7      "score": 95,
8      "reason_code": "corporate_email",
9      "description": "Corporate email domain with high trust score",
10      "risk_level": "low"
11    },
12    {
13      "factor": "ip_address",
14      "score": 85,
15      "reason_code": "residential_ip",
16      "description": "Residential IP address from trusted ISP",
17      "risk_level": "low"
18    },
19    {
20      "factor": "velocity",
21      "score": 85,
22      "reason_code": "normal_velocity",
23      "description": "Normal signup velocity patterns detected",
24      "risk_level": "low"
25    },
26    {
27      "factor": "user_agent",
28      "score": 95,
29      "reason_code": "standard_browser",
30      "description": "Standard web browser user agent detected",
31      "risk_level": "low"
32    }
33  ],
34  "request_id": "123e4567-e89b-12d3-a456-426614174000",
35  "processed_at": "2025-01-15T10:30:00Z"
36}

Response Fields

Field	Type	Description
`trust_score`	integer	Overall trust score (0-100)
`risk_level`	string	`low`, `medium`, or `high`
`reasons`	array	Detailed breakdown of each scoring factor
`request_id`	uuid	Unique request identifier for support