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POST
/
v1
/
rules
Create a Rule
curl --request POST \
  --url https://tracer.lerian.io/v1/rules \
  --header 'Content-Type: <content-type>' \
  --header 'X-API-Key: <x-api-key>' \
  --data '
{
  "name": "Block high-value transactions",
  "description": "Deny transactions above BRL 10,000 for card payments",
  "expression": "transaction.amount > 1000000",
  "action": "DENY",
  "scopes": [
    {
      "transactionType": "CARD"
    }
  ]
}
'
{
  "ruleId": "cc1e8400-e29b-41d4-a716-446655440020",
  "name": "Block high-value transactions",
  "description": "Deny transactions above BRL 10,000 for card payments",
  "expression": "transaction.amount > 1000000",
  "action": "DENY",
  "scopes": [
    {
      "transactionType": "CARD"
    }
  ],
  "status": "DRAFT",
  "createdAt": "2026-01-30T10:00:00Z",
  "updatedAt": "2026-01-30T10:00:00Z"
}

Headers

​
Content-Type
string
required

The type of media of the resource. Must be application/json.

​
X-API-Key
string
required

The API Key for authentication. This header is required for all endpoints except health checks.

​
X-Request-Id
string<uuid>

A unique identifier used to trace and track each request.

Body

application/json

Input for creating a new rule.

​
name
string
required

Human-readable rule name (must be globally unique).

Required string length: 1 - 255
​
expression
string
required

CEL expression that must evaluate to boolean.

Required string length: 1 - 5000
​
action
enum<string>
required

Action taken when rule expression evaluates to true.

Available options:
ALLOW,
DENY,
REVIEW
​
description
string

Rule purpose and logic explanation.

Maximum string length: 1000
​
scopes
object[]

Scopes that determine which transactions this rule applies to.

Maximum array length: 100

Response

Indicates that the rule was successfully created in DRAFT status.

Validation rule.

​
ruleId
string<uuid>

Unique identifier for the rule.

​
name
string

Human-readable rule name (globally unique).

Maximum string length: 255
​
description
string

Rule purpose and logic explanation.

Maximum string length: 1000
​
expression
string

CEL expression that must evaluate to boolean.

Maximum string length: 5000
​
action
enum<string>

Action taken when rule expression evaluates to true.

Available options:
ALLOW,
DENY,
REVIEW
​
scopes
object[]

Scopes that determine which transactions this rule applies to.

​
status
enum<string>

Rule lifecycle status.

Available options:
DRAFT,
ACTIVE,
INACTIVE,
DELETED
​
createdAt
string<date-time>

When the rule was created.

​
updatedAt
string<date-time>

When the rule was last modified.

​
activatedAt
string<date-time> | null

When rule was last activated (null if never activated).

​
deactivatedAt
string<date-time> | null

When rule was last deactivated (null if never deactivated).

​
deletedAt
string<date-time> | null

When rule was deleted (null if not deleted).