RL-gyms for AI agents 

Push your agent on context-rich simulated environments and specialized

RL-gyms. Get high-fidelity trajectories and graded eval signals for training

and evaluating AI agents at scale.

Harness-agnostic by design: use Toloka’s harness
or yours—with grading hooks and user-LLM emulation.

Trusted by Leading ML & AI Teams

Trusted by Leading ML & AI Teams

What we build

  • MCP replicas


    of enterprise tools
    MCP replicas

of enterprise tools
    MCP replicas

of enterprise tools

    Model Context Protocol replicas of enterprise tools with realistic schemas, data flows,

and permission models. 

  • Computer‑use
    mockups
    Computer‑use mockups
    Computer‑use mockups

    Isolated, containerized browsers and interactive web applications, instrumented for DOM/screen diffs and tool/API calls. 

  • Synthetic
    companies
    Synthetic companies
    Synthetic companies

    Multi-user virtual organizations with realistic communications, document exchanges, approvals, and business processes that produce stateful context over time. 

  • Human-simulated
    virtual companies
    Human-simulated virtual companies
    Human-simulated virtual companies

    Real expert teams executing authentic workflows with full artifact capture across version control, project management,

and communication tools. 

How it works: environments built by engineers, for engineers 

Managed end-to-end environment and data operations 

  1. Requirements & scope

    You give goals, constraints and success criteria. We translate them in environments, trajectory schemas, rubrics, and QA plans.

  2. Environment design

    Containerized testbeds with seeded data

and instrumented trajectory capture, invariants, and event log.

  3. Calibration and seed tasks

    Domain experts execute seed tasks;

we validate invariants, success metrics,

and telemetry to stabilize the environment. 

  4. Data collection

    You give goals, constraints and success criteria. We translate them in environments, trajectory schemas, rubrics, and QA plans.

  5. Hybrid QA (AI Agent + human)

    QA AI Agent verifies trubric adherence, logical consistency, environment invariants, task completion, and structural integrity. Senior

QAs audit complex, flagged, or sampled cases. Feedback always tunes QA Agent

  6. Delivery and integration

    Receive versioned datasets, eval reports,

and structured outputs ready for training

and benchmarking. Always audit-ready. 

    Harness-agnostic adapters available; human, scripted, and LLM-judge grading are supported.

Instrumentation and reproducibility 

Instrumentation and reproducibility 

  • Instrumentation

and logging 

    Complete trajectory capture

with state-action sequences,

tool/API interactions, timing signals, environment versions/seeds, and screen/DOM diffs. 

  • Deterministic replay 

    Versioned environments, deterministic resets, and controlled seeds enable exact repro of agent runs and human trajectories.

  • Structured outputs 

    Per-step/per-task labels, failure categorization, safety flags, and calibrated scores

for SFT and RLAIF workflows.

Where this applies 

Web agents

Enterprise automation

Code agents

On-device and constrained agents

Safety-conscious workflows

Domain-specific agents
(Tau-style RL-gyms)

Multi‑step navigation, e‑commerce workflows, and form completion in realistic site contexts.

Aligns with public web‑interaction benchmarks (e.g., WebArena/VisualWebArena, Mind2Web, WebShop/MiniWoB++), while adding enterprise‑grade context and replayable traces.

Web agents

Enterprise automation

Code agents

On-device and constrained agents

Safety-conscious workflows

Domain-specific agents
(Tau-style RL-gyms)

Multi‑step navigation, e‑commerce workflows, and form completion in realistic site contexts.

Aligns with public web‑interaction benchmarks (e.g., WebArena/VisualWebArena, Mind2Web, WebShop/MiniWoB++), while adding enterprise‑grade context and replayable traces.

Web agents

Enterprise automation

Code agents

On-device and constrained agents

Safety-conscious workflows

Domain-specific agents
(Tau-style RL-gyms)

Privacy, security, and auditability

Privacy, security, and auditability

  • PII scrubbing and policy-compliant use of foundation models with client-approved data handling.

  • Secure, containerized execution
    and controlled credentials
    in isolated testbeds.

  • Comprehensive audit logs covering environment versions, configs, reviewers, and QA outcomes for exact repro. 

Partner with Toloka 

Build vs. buy 

  • Offload environment engineering, data collection, and QA operations
    to a team that does this full-time.

  • Faster to first useful dataset; more flexible than hiring for bursty, specialized work. 

Why Toloka 

  • Depth in agentic data: instrumented, stateful environments and not just annotation.

  • Hybrid QA that blends tool-enabled checks with senior human judgment, tuned to your rubric.

  • A rigorously vetted expert network with measurable controls and continuous calibration. 

  • Audit-ready reproducibility: versioned environments, deterministic resets, and comprehensive logs.

  • For Tau-style RL-gyms: calibrated difficulty targeting ~50% pass rate and a dedicated tri-role expert pipeline.

Partner with Toloka 

Build vs. buy 

  • Offload environment engineering, data collection, and QA operations
    to a team that does this full-time.

  • Faster to first useful dataset; more flexible than hiring for bursty, specialized work. 

Why Toloka 

  • Depth in agentic data: instrumented, stateful environments and not just annotation.

  • Hybrid QA that blends tool-enabled checks with senior human judgment, tuned to your rubric.

  • A rigorously vetted expert network with measurable controls and continuous calibration. 

  • Audit-ready reproducibility: versioned environments, deterministic resets, and comprehensive logs.

  • For Tau-style RL-gyms: calibrated difficulty targeting ~50% pass rate and a dedicated tri-role expert pipeline.

Partner with Toloka 

Build vs. buy 

  • Offload environment engineering, data collection, and QA operations
    to a team that does this full-time.

  • Faster to first useful dataset; more flexible than hiring for bursty, specialized work. 

Why Toloka 

  • Depth in agentic data: instrumented, stateful environments and not just annotation.

  • Hybrid QA that blends tool-enabled checks with senior human judgment, tuned to your rubric.

  • A rigorously vetted expert network with measurable controls and continuous calibration. 

  • Audit-ready reproducibility: versioned environments, deterministic resets, and comprehensive logs.

  • For Tau-style RL-gyms: calibrated difficulty targeting ~50% pass rate and a dedicated tri-role expert pipeline.

Dive deeper

Read more on our dedicated blog article

Read now

Frequently Asked Questions

How realistic are the environments?

Can we bring our own data, tools, or credentials?

How reproducible are runs?

Do you support custom workflows and edge cases?

What about quality?

How quickly can you stand up a pilot?

How do you handle privacy and security?

How do costs scale?

How realistic are the environments?

Can we bring our own data, tools, or credentials?

How reproducible are runs?

Do you support custom workflows and edge cases?

What about quality?

How quickly can you stand up a pilot?

How do you handle privacy and security?

How do costs scale?

How realistic are the environments?

Can we bring our own data, tools, or credentials?

How reproducible are runs?

Do you support custom workflows and edge cases?

What about quality?

How quickly can you stand up a pilot?

How do you handle privacy and security?

How do costs scale?

Trusted by Leading ML & AI Teams

Trusted by Leading ML & AI Teams

Ready to accelerate agent development? 

Bring us a target workflow, a tool stack, or a training/eval gap.
We’ll showcase the plan we’d run end-to-end to get you to your goal.