SteerllySteerlly

Build Reliable AI Agents. Define. Test. Deploy. Monitor.

The developer-first platform to orchestrate, evaluate, and deploy AI agents. Bring engineering rigor to your LLM workflows without the complexity.

Define
Agents & Tools
Evaluate
Quality Gates
Deploy
Versioned API
Monitor
Real-time Trace
Configuration as Code

One file. Full control.

Define your entire agent system in a single YAML file. Version it, review it, deploy it.

Agents

Define roles, instructions, and capabilities. Single agent or multi-agent teams.

Tools

Connect APIs via OpenAPI specs or MCP servers.

Orchestration

Router pattern, sequential chains, or hierarchical delegation.

support-agent.yaml
name: E-commerce Support
version: 1
orchestration: coordinator
tools:
- id: orders_api
type: openapi
openapi_url: "https://api.shop.com/spec.json"
agents:
- name: router
role: coordinator
instructions: Route to the right specialist
sub_agents:
- name: refund_specialist
instructions: |
Process refund requests.
Always verify order status first.
tools:
- ref: orders_api
approval: # Human-in-the-loop
- process_refund
Human approval required for sensitive operations like refunds
Advanced Orchestration

Complex flows made simple.
From sequential to hierarchical.

Build sophisticated multi-agent systems without the spaghetti code. Support for router patterns, sequential chains, and hierarchical swarms out of the box.

  • Router Pattern

    Intelligent dispatching based on user intent.

  • Sequential & Hierarchical

    Chain agents or delegate to specialist sub-agents.

"Draft a contract for a new client"
Router Agent
Legal Expert
Researcher
Copywriter
Evaluation & Testing

Don't guess what works.
Prove it with data.

Test your entire agent stack: prompts, models, tool configurations, and sub-agent hierarchies. Run experiments at scale and only deploy what passes your quality gates.

  • Bulk Runners

    Test 50+ inputs in parallel seconds.

  • Quantitative Scoring

    Exact match, Semantic similarity, JSON validity.

Experiment #842

Running
2 configs • 50 cases
Input CaseBaselineVariant
"Refund order #123"
Pass (0.98)
Pass (0.99)
"Cancel my sub"
Fail (0.45)
Missed policy check
Pass (0.92)
Win Rate82%96%
Human-in-the-Loop

AI shouldn't always fly solo.
Inject human judgment when it matters.

Don't let agents hallucinate on sensitive tasks. Configure granular approval gates for specific tools (e.g. `refund_user`, `publish_tweet`) or logical steps. Review context, edit drafted responses, and approve execution in one click.

  • Auto-Pause

    Workflows suspend automatically at critical checkpoints.

  • Granular Permissions

    Define who can approve what (RBAC).

AI
Drafting email to customer...
Approval Required: Send Email1m ago
Subject: Your refund is approved
Body: Hi Alice, we've processed your refund of $50...
Full Observability

Open the black box.
See exactly what happened.

Debug complex agent interactions with ease. Trace every step, tool call, and state change in real-time. Replay sessions to understand failure modes and optimize token usage.

Session Replay

Step-by-step time travel.

Deep Tracing

Inspect inputs, outputs & latency.

Cost Tracking

Monitor spend per user/agent.

Live Stream

Watch execution as it happens.

user_input0ms
"Find flights to Tokyo next week"
agent: planner450ms
Thinking... Calls tool search_flights
tool: search_flights1200ms
{ "destination": "HND", "dates": "flexible" }
Response Generated

Universal Connectivity

Don't rebuild your tools. Connect them. We support the standards you already use.

OpenAPI / Swagger

Import your existing API specs. We automatically generate type-safe tools for your agents. No glue code required.

your-api.com/openapi.json -> crm_tools

MCP Protocol

Native support for the Model Context Protocol. Connect local resources and internal tools securely.

mcp-server-erp -> user_directory

Python FunctionsComing Soon

Need custom logic? Write Python functions and expose them as tools. We handle the execution sandbox.

def pricing_engine(q) -> quote_tool

Enterprise-grade Agent Orchestration

We are currently working with select partners to build the future of autonomous agents.

Early Access

Pilot Program

For innovative teams ready to deploy autonomous agents in production.

  • Dedicated solution architect
  • Custom integration support (MCP & OpenAPI)
  • Uncapped usage limits during pilot
  • Direct access to engineering team

Enterprise

Full platform access, dedicated SLA, and priority support.

  • Dedicated infrastructure
  • SSO & Advanced RBAC
  • Custom SLAs & Support
  • Audit Logs & Compliance

Frequently Asked Questions

Everything you need to know about the platform.