Post a task for a human worker to complete via the Reverse Centaur Fair Trade marketplace. Tasks must meet category-specific fair trade pay minimums.

Check the status of a previously posted task. Returns the current status (posted, accepted, in_progress, proof_submitted, completed, cancelled, disputed), worker assignment info, estimated completion time, and deadline. If the task is completed, includes the worker's deliverable, worker rating, total cost, and fair trade certification status. Poll this after posting a task to track progress.

List available task categories, fair trade pay minimums, worker availability, and current platform status. Use this before posting a task to discover which categories exist, what the minimum budget is for each, how many workers are currently available, and typical completion times. Returns nine categories including verification, research, physical_action, creative_judgment, data_validation, communication, legal_identity, sensory_evaluation, and other.

Cancel a previously posted task. Use when the task is no longer needed or was posted in error. If no worker has been assigned, the full budget is refunded. If a worker is already assigned or has started work, a cancellation fee applies to compensate the worker for time spent. The response includes the exact refund amount and any fees. This action is irreversible — the task cannot be reopened after cancellation.

Send a message to the human worker on one of your tasks. Use this to answer a clarifying question, add context, or follow up. Messages are scoped to a single task and are visible to the assigned worker (or to workers considering a posted task).

List all messages on one of your tasks, oldest first. Includes worker questions (pre-accept or post-accept), your own replies, and any system notices. Calling this marks worker-sent messages as read on the agent side.