Hologram Webhooks API

The Webhooks API from Hologram — 1 operation(s) for webhooks.

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this
  • find_apisBrowse and filter every API in the catalog.
  • get_api_artifactsOne API's artifacts, grouped by type.
  • get_openapiThe primary OpenAPI for this API.
  • find_similar_apisAPIs that look like this one.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools

Call it yourself

curl for this page
This API
curl "https://apis.io/api/v1/apis/hologram-webhooks-api"
All apis
curl "https://apis.io/api/v1/apis?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no email required.

A second provider on the same verified email joins the account you already have.

OpenAPI Specification

hologram-webhooks-api-openapi.yml Raw ↑
openapi: 3.0.1
info:
  title: Hologram REST Cellular Links Webhooks API
  description: REST API for the Hologram global cellular IoT connectivity platform. Manage devices and cellular links (SIMs), activate and pause SIMs, change data plans, query data and SMS usage, send SMS and cloud messages to devices, manage device tags, and read available data plans. All requests are authenticated with HTTP Basic auth using the username `apikey` and the API key as the password.
  termsOfService: https://www.hologram.io/terms/
  contact:
    name: Hologram Support
    url: https://support.hologram.io/
  version: '1.0'
servers:
- url: https://dashboard.hologram.io/api/1
security:
- apikeyAuth: []
tags:
- name: Webhooks
paths:
  /devices/messages/{deviceid}/{webhookguid}:
    post:
      operationId: sendWebhookMessage
      tags:
      - Webhooks
      summary: Send a message to a device via a webhook GUID
      description: Pre-authenticated inbound endpoint that delivers a message to a device addressed by its id and a per-device webhook GUID. Does not require API key authentication.
      security: []
      parameters:
      - $ref: '#/components/parameters/deviceid'
      - name: webhookguid
        in: path
        required: true
        schema:
          type: string
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                data:
                  type: string
                base64data:
                  type: string
      responses:
        '200':
          description: The message was delivered.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/SuccessResponse'
components:
  parameters:
    deviceid:
      name: deviceid
      in: path
      required: true
      schema:
        type: integer
  schemas:
    SuccessResponse:
      type: object
      properties:
        success:
          type: boolean
        error:
          type: string
  securitySchemes:
    apikeyAuth:
      type: http
      scheme: basic
      description: HTTP Basic authentication. Use the literal username `apikey` and your Hologram API key as the password. The API key may alternatively be supplied as an `apikey` query parameter.