Work Market Webhooks

generated: '2026-07-21'
method: searched
source: https://developer.workmarket.com/page/webhooks
type: Webhooks
description: >-
  WorkMarket's outbound event surface is webhooks (no AsyncAPI document is
  published). Webhooks push assignment-lifecycle events to any external URL
  with a configurable HTTP method, headers, and templated body. They are a
  premium feature enabled by an account manager and are configured at
  https://www.workmarket.com/mmw/integration/webhooks. Failed callouts are
  retried once. Date/time variables can be emitted as Unix time or ISO 8601.
configuration:
  console: https://www.workmarket.com/mmw/integration/webhooks
  methods: [GET, POST, PUT, PATCH, DELETE]
  headers: Content-Type required; additional custom headers supported
  body: templated JSON/XML payload using webhook variables
  retry: 1 retry on failure
  timestamps: Unix time or ISO 8601 (configurable)
events:
  - name: Accepted
    description: Assignment was accepted by a worker.
  - name: Approved
    description: Assignment was approved for payment.
  - name: Attachment Added
  - name: Attachment Removed
  - name: Bonus Added
    description: Bonus added by employer.
  - name: Bonus Approved
    description: Bonus request approved.
  - name: Bonus Declined
    description: Bonus request declined.
  - name: Bonus Requested
    description: Bonus requested by worker.
  - name: Budget Increase Added
    description: Budget Increase added by employer.
  - name: Budget Increase Approved
    description: Budget Increase request approved.
  - name: Budget Increase Declined
    description: Budget Increase request declined.
  - name: Budget Increase Requested
    description: Budget Increase requested by worker.
  - name: Cancel
    description: Assignment cancelled.
  - name: Check In
    description: Worker checked in (or updated an existing check in).
  - name: Check Out
    description: Worker checked out (or updated an existing check out).
  - name: Completed
    description: Assignment transitioned to "Pending Approval" status (worker submitted for approval).
  - name: Confirm
    description: Worker confirmed intent to fulfill an assignment.
  - name: Created
    description: Assignment was created.
  - name: Custom Fields Updated
    description: Custom field values updated.
  - name: Expense Reimbursement Added
    description: Expense Reimbursement added by employer.
  - name: Expense Reimbursement Approved
    description: Expense Reimbursement request approved.
  - name: Expense Reimbursement Declined
    description: Expense Reimbursement request declined.
  - name: Expense Reimbursement Requested
    description: Expense Reimbursement requested by worker.
  - name: Label Added
  - name: Label Removed
  - name: Counteroffer Approved
    description: Counteroffer approved by employer.
  - name: Counteroffer Declined
    description: Counteroffer declined.
  - name: Counteroffer Requested
    description: Counteroffer requested by worker (includes worker applications).
  - name: Note Added
    description: Message added to assignment.
  - name: Paid
    description: Assignment invoice paid.
  - name: Reschedule Approved
    description: Reschedule request approved.
  - name: Reschedule Declined
    description: Reschedule request declined.
  - name: Reschedule Requested
  - name: Sent
    description: Assignment transitioned to Sent status.
  - name: Voided
    description: Assignment voided.
variables:
  all_events:
    - assignment_id
    - status
    - start_date_time
    - pricing_type
    - end_date_time
    - pricing_flat_price
    - pricing_per_hour_price
    - pricing_max_number_of_hours
    - pricing_max_number_of_units
    - pricing_per_unit_price
    - pricing_additional_per_hour_price
    - pricing_max_additional_number_of_hours
    - resolution
    - hours_worked
    - units_completed
    - expense_reimbursement
    - bonus
    - invoice_id
    - total_cost
    - statement_id
    - owner_id
    - owner_email
    - client_name
    - client_id
    - client_customer_id
    - project_id
    - project_name
    - now
    - custom_field_#####
  event_specific:
    Accepted: [resource_id, resource_first_name, resource_last_name, resource_mobile, resource_phone, resource_address1, resource_address2, resource_city, resource_state, resource_postal_code, resource_country, resource_email]
    Check In: [note, checked_in_on, check_in_out_id]
    Check Out: [note, checked_out_on, check_in_out_id]
    Label Added: [note, label_name, label_id, is_negotiation]
    Label Removed: [note, label_name, label_id, is_negotiation]
    Negotiations: [note, negotiation_id]
    Expense Reimbursement / Bonus: [amount]
    Budget Increase Requested: [proposed_flat_price, proposed_max_initial_number_of_hours, proposed_max_additional_number_of_hours, proposed_max_number_of_units]
    Reschedule Requested: [proposed_start_date_time, proposed_end_date_time]
    Attachment Added: [file_name, file_description, file_uuid, file_data_base64, file_data_binary, file_data_byte_length]
    Attachment Removed: [file_name, file_description, file_uuid]
deprecated_variables:
  - name: file_data
    replacement: file_data_base64
examples: https://developer.workmarket.com/page/webhook-examples