AWS Amazon Mechanical Turk

Name: Amazon Mechanical Turk API
Brand: Amazon Mechanical Turk
Availability: InStock

★ Only Publicly Available OpenAPI DocumentAI/MLMl Inferencehmac39 EndpointsREST

Install Jentic One Beta

Connect the Amazon Mechanical Turk to your agent

Jentic One is a self-hosted execution layer for AI agents. It lets your agent call the Amazon Mechanical Turk, or any other public or private API you need. You set the rules, the agent never sees your credentials, and every call is logged.

Two steps, two machines. Install the instance in a safe environment, then register your agent from wherever it runs.

Step 1: Jentic One Host machine

# On the machine that will host your Jentic One instance:
curl -fsSL https://raw.githubusercontent.com/jentic/jentic-one/main/tools/install.sh | sh

Step 2: Agent machine

# On the machine where your agent runs (keep this separate from the instance):
curl -fsSL https://raw.githubusercontent.com/jentic/jentic-one/main/tools/install.sh | sh
jentic register       # connects your agent to your Jentic One instance

Jentic One is in public beta. The setup above keeps your agent separate from the instance, which is what you want before using real credentials: an agent running as the same OS user as Jentic One can read its stored keys directly. Just evaluating? A single local install is fine to start. See the secure deployment guide for the tiers.

Capabilities

What an agent can do with Amazon Mechanical Turk API.

Publish Human Intelligence Tasks (HITs) with title, description, reward, lifetime, and assignment count

Create reusable HITTypes with shared properties for batches of similar tasks

List and review submitted Assignments and approve, reject, or send back to Workers

GET STARTED

Start building with Amazon Mechanical Turk API

Explore with Jentic

View OpenAPI Document

For Agents

Publish, manage and review human-completed tasks (HITs) on Amazon Mechanical Turk - create HITs, approve or reject assignments, manage worker qualifications, and pay bonuses.

Use for: Publish a new HIT for image classification with a $0.10 reward, List all my HITs that are still Assignable, Approve all submitted assignments for HIT id 3ABCXYZ, Reject an assignment with feedback for the worker

Not supported: Does not handle Worker-side task completion, payment processing outside MTurk, or hosting custom HIT UIs - use for the Requester lifecycle of HITs, assignments, qualifications, and bonuses only.

Use Cases

Patterns agents use Amazon Mechanical Turk API for, with concrete tasks.

★ Crowdsource Labels for Machine Learning Training Data

ML teams need labelled image, text or audio data to train supervised models. Mechanical Turk lets a Requester publish HITs with custom HTML/QuestionForm content, set a per-assignment reward and lifetime, and collect responses from a global Worker pool. The CreateHIT and ListAssignmentsForHIT endpoints, combined with QualificationRequirements, support producing high-quality labelled datasets at low unit cost.

Call CreateHIT with Title='Label image content', Reward='0.10', LifetimeInSeconds=86400, MaxAssignments=3 and a QuestionForm XML, then poll ListAssignmentsForHIT and approve qualifying responses

Build a Vetted Worker Pool With Custom Qualifications

Sensitive or domain-specific tasks (medical text annotation, multilingual transcription) require Workers with verified skills. MTurk's Qualifications API lets a Requester define a custom QualificationType, grant it via QualificationRequest review or a built-in Qualification test, and then require it on subsequent HITs. The agent can review pending QualificationRequests and accept or reject them based on a custom rubric.

Call CreateQualificationType, then list pending requests with ListQualificationRequests and call AcceptQualificationRequest for those who pass a rubric check

Run a Human-in-the-Loop Validation Step

Generative AI pipelines often need a human review step on uncertain model outputs. An agent can take low-confidence outputs from a model, publish them as small HITs (each Assignment shows two model outputs and asks a Worker to pick the better one), and feed the resulting human preferences back into reward modelling. The same primitives - CreateHIT, list assignments, approve, bonus - drive both data labelling and HITL validation.

Call CreateHITWithHITType for each low-confidence output using a pre-built HITType, collect assignments, and aggregate Worker preferences for a feedback dataset

AI Agent Integration for Crowdsourced Workflows

Through Jentic, an AI agent can orchestrate the full Requester lifecycle on Mechanical Turk - publish HITs, list and review assignments, pay bonuses, manage worker pools - without writing custom boto3 logic. Jentic returns the input schema for each MTurk operation and brokers SigV4 credentials so an LLM can drive crowdsourcing workflows from natural-language instructions.

Resolve the intent 'publish a Mechanical Turk HIT' via Jentic search, load the CreateHIT schema, and execute it with title, reward, lifetime, max assignments and a QuestionForm body

Key Endpoints

39 endpoints — jentic publishes the only available openapi specification for amazon mechanical turk, keeping it validated and agent-ready.

METHOD

PATH

DESCRIPTION

POST

/#X-Amz-Target=MTurkRequesterServiceV20170117.CreateHIT

Publish a new Human Intelligence Task

POST

/#X-Amz-Target=MTurkRequesterServiceV20170117.ListHITs

List the Requester's HITs with paging

POST

/#X-Amz-Target=MTurkRequesterServiceV20170117.ApproveAssignment

Approve a submitted assignment and pay the Worker

POST

/#X-Amz-Target=MTurkRequesterServiceV20170117.RejectAssignment

Reject an assignment with feedback

POST

/#X-Amz-Target=MTurkRequesterServiceV20170117.SendBonus

Send a bonus payment to a Worker

POST

/#X-Amz-Target=MTurkRequesterServiceV20170117.CreateQualificationType

Create a custom qualification type

POST

/#X-Amz-Target=MTurkRequesterServiceV20170117.AcceptQualificationRequest

Approve a Worker's qualification request

POST

/#X-Amz-Target=MTurkRequesterServiceV20170117.CreateHIT

Publish a new Human Intelligence Task

POST

/#X-Amz-Target=MTurkRequesterServiceV20170117.ListHITs

List the Requester's HITs with paging

POST

/#X-Amz-Target=MTurkRequesterServiceV20170117.ApproveAssignment

Approve a submitted assignment and pay the Worker

POST

/#X-Amz-Target=MTurkRequesterServiceV20170117.RejectAssignment

Reject an assignment with feedback

POST

/#X-Amz-Target=MTurkRequesterServiceV20170117.SendBonus

Send a bonus payment to a Worker

Why Jentic?

Three things that make agents converge on Jentic-routed access.

Credential isolation

Your AWS access key is stored once, encrypted, by your own Jentic One instance and used to sign each MTurk request with SigV4 at execution time. The raw secret never enters the agent's prompt, logs, or context.

Intent-based discovery

Agents search Jentic by intent such as 'publish a Mechanical Turk HIT' or 'list MTurk assignments', and Jentic returns the matching MTurk operation such as CreateHIT with its input schema so the agent calls the right endpoint without browsing the AWS reference.

Time to first call

FAQs

Specific to using Amazon Mechanical Turk API through Jentic.

Why is there no official OpenAPI spec for Amazon Mechanical Turk?

AWS does not publish an OpenAPI specification. Jentic generates and maintains this spec so that AI agents and developers can call Amazon Mechanical Turk via structured tooling. It is validated against the live API and kept up to date. Get started with Jentic One, the self-hosted execution layer.

What authentication does the Mechanical Turk Requester API use?

The MTurk Requester API is signed with AWS Signature Version 4 using IAM access keys. Through Jentic, those AWS credentials live in your Jentic One instance and are used to sign each MTurk request on the agent's behalf - the raw access key never reaches the agent.

Can I create a HIT with custom HTML or external page content?

Yes. CreateHIT accepts either a Question (XML - QuestionForm or HTMLQuestion) describing the task content directly, or an HITLayoutId pointing at a published layout. HTMLQuestion can iframe an externally hosted page for richer interfaces such as bounding-box image annotation.

What are the rate limits for Mechanical Turk?

MTurk enforces per-Requester throttling on the control plane; specific TPS values are not published in the spec. Treat throttling as expected, especially for ListAssignmentsForHIT during bulk reviews, and apply exponential backoff between calls.

How do I approve a batch of assignments through Jentic?

Use the Jentic search query 'list MTurk assignments', load ListAssignmentsForHIT, then for each Submitted assignment call ApproveAssignment with the AssignmentId and an optional RequesterFeedback string. Jentic signs each request with SigV4 against your stored AWS credentials.

Is Mechanical Turk free?

MTurk charges a fee on top of each Worker reward and bonus payment, with higher fees for HITs that require custom Qualifications. There is no charge for control-plane API calls themselves, but a Requester account must be funded to publish paid HITs.

Can I limit what my agent is allowed to do with the Amazon Mechanical Turk API?

Yes. Because you run Jentic One yourself, your own rules decide which MTurk operations and AWS credentials the agent may use. Since MTurk carries HIT and assignment ids in the request body rather than the URL path, scoping is done per operation rather than by path prefix: you can allow only the operations the agent needs, such as CreateHIT and ApproveAssignment, so operations like RejectAssignment or DeleteHIT are not included unless you add them. The AWS access key is signed into each request by your instance at execution time and never reaches the agent.

AWS Amazon Mechanical Turk

Connect the Amazon Mechanical Turk to your agent

Capabilities

Start building with Amazon Mechanical Turk API

Use Cases

Key Endpoints

Why Jentic?

Related APIs

FAQs