> ## Documentation Index
> Fetch the complete documentation index at: https://docs.getsly.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Create a webhook subscription

> Returns `secret` (whsec_*) shown once — save it to verify signatures. See [signature verification](/sdks/webhook-verification).



## OpenAPI

````yaml /api-reference/openapi.json post /v1/webhooks
openapi: 3.1.0
info:
  title: Sly API
  description: >-
    The Agentic Economy Platform — stablecoin payments, agent wallets,
    multi-protocol commerce, and AI agent orchestration.
  version: 1.0.0
  contact:
    name: Sly
    url: https://getsly.ai
    email: support@getsly.ai
servers:
  - url: https://api.getsly.ai/v1
    description: Production
  - url: https://sandbox.getsly.ai/v1
    description: Sandbox
security:
  - bearerAuth: []
paths:
  /v1/webhooks:
    post:
      tags:
        - Webhooks
      summary: Create a webhook subscription
      description: >-
        Returns `secret` (whsec_*) shown once — save it to verify signatures.
        See [signature verification](/sdks/webhook-verification).
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/CreateWebhookInput'
      responses:
        '201':
          description: Webhook created
          content:
            application/json:
              schema:
                type: object
                properties:
                  data:
                    $ref: '#/components/schemas/WebhookWithSecret'
                required:
                  - data
        '400':
          description: Validation error
          content:
            application/json:
              schema:
                allOf:
                  - $ref: '#/components/schemas/Error'
                  - properties:
                      error:
                        type: string
                      code:
                        type: string
                      details: {}
      security:
        - bearerAuth: []
components:
  schemas:
    CreateWebhookInput:
      type: object
      properties:
        url:
          type: string
          format: uri
        events:
          type: array
          items:
            type: string
          minItems: 1
        description:
          type: string
          maxLength: 500
      required:
        - url
        - events
    WebhookWithSecret:
      allOf:
        - $ref: '#/components/schemas/Webhook'
        - type: object
          properties:
            secret:
              type: string
              description: >-
                whsec_* — shown ONCE on creation; used for HMAC-SHA256 signature
                verification
          required:
            - secret
    Error:
      type: object
      properties:
        error:
          type: string
        code:
          type: string
        details: {}
        request_id:
          type: string
      required:
        - error
    Webhook:
      type: object
      properties:
        id:
          type: string
          format: uuid
        url:
          type: string
          format: uri
        name:
          type:
            - string
            - 'null'
        description:
          type:
            - string
            - 'null'
        events:
          type: array
          items:
            type: string
          description: Supports wildcards like "transfer.*"
        status:
          type: string
          enum:
            - active
            - disabled
            - failing
        consecutive_failures:
          type: integer
        created_at:
          type: string
          format: date-time
      required:
        - id
        - url
        - events
        - status
        - consecutive_failures
        - created_at
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: >-
        API key (pk_test_* or pk_live_*), JWT session, agent token (agent_*),
        Ed25519 session (sess_*), or portal token (portal_*).

````