routelabs-router 0.3.0

Local-first OpenAI-compatible and Anthropic-compatible runtime for hybrid LLM routing, verification-aware escalation, and privacy-aware local execution.

RouteLabs Router

RouteLabs Router is a local-first routing runtime that sits between your app and local/cloud LLMs.

It lets you keep the client surface your app already uses while adding:

• local-first execution
• verification-aware escalation
• privacy-aware routing
• visible traces for why a request stayed local, escalated, or fell back

It is designed to feel like a practical gateway, not just a routing idea:

• OpenAI-compatible endpoints and an Anthropic-compatible Messages endpoint
• local-first execution with cloud fallback
• verification-aware escalation
• privacy-aware local preference
• startup checks, model visibility, and request-level performance traces

It gives applications one endpoint that can decide:

• when to stay local
• when to use the cloud
• when privacy should override convenience
• which provider and model should handle the request
• why that decision was made
• when verification forced an escalation
• when privacy detection forced local execution

The goal is simple: keep easy and sensitive work local, escalate only when needed, and stay compatible with the SDKs and agent tools people already use.

Why Try It

• You already have OpenAI-style or Anthropic-style clients and want to switch by changing base_url
• You want local-first routing without losing cloud fallback
• You want to see why a request stayed local, escalated, or failed over
• You want one runtime layer above Ollama, llama.cpp, OpenAI-compatible backends, and Anthropic

Who This Is For

This repo is mainly for:

• AI app builders
• local-first power users
• agent and workflow developers
• teams experimenting with privacy-aware and cost-aware inference

If you want a polished end-user chat app, this is not that. If you want a runtime and routing layer you can plug into your own tools, this is exactly that.

What This Is

Think of RouteLabs as:

• a local runtime/server you run on your machine
• a Python client you can call from your app
• an OpenAI-compatible endpoint you can place in front of existing clients

It is not primarily:

• a browser extension
• a desktop UI
• a plugin marketplace product

Those may come later, but the current product is a runtime + middleware + API.

60-Second Quickstart

Install from PyPI, start the runtime, and send one request. Cloud keys are optional.

pip install routelabs-router
export OPENAI_API_KEY=your_api_key_here  # optional, enables cloud execution
export ANTHROPIC_API_KEY=your_api_key_here  # optional, enables Anthropic cloud execution
router start --reload

Then in another terminal:

curl -X POST http://127.0.0.1:8000/v1/chat/completions \
  -H "Content-Type: application/json" \
  -d '{
    "messages":[{"role":"user","content":"Summarize this in one sentence: RouteLabs Router chooses between local and cloud models based on privacy, cost, latency, and task complexity."}],
    "private":false
  }'

If you prefer Anthropic-style clients:

curl -X POST http://127.0.0.1:8000/v1/messages \
  -H "Content-Type: application/json" \
  -d '{
    "model":"claude-sonnet-4-20250514",
    "max_tokens":256,
    "messages":[{"role":"user","content":"Summarize RouteLabs Router in one sentence."}],
    "private":false
  }'

Install

Recommended user install

pip install routelabs-router
router start

Contributor install

Clone the repo and install from source:

git clone https://github.com/routelabsai/router.git
cd router
conda create -n routelabs-router python=3.11 -y
conda activate routelabs-router
python -m pip install --upgrade pip setuptools wheel
pip install -e '.[dev]'
router start --reload

Why Use This

Most teams today have one of these problems:

• Ollama runs local models well, but it does not decide when a task should stay local versus escalate
• cloud gateways like LiteLLM and OpenRouter route across hosted APIs, but they are not built around local-first policy decisions
• chat apps can call models, but they usually hide the execution logic instead of exposing it

RouteLabs Router is the layer above those tools.

It is for teams who want:

• one API for hybrid local + cloud inference
• /v1/responses support for newer agent-style clients
• /v1/messages support for Anthropic-style clients
• OpenAI-compatible model discovery for existing SDKs and UIs
• live Ollama model discovery
• embeddings support for retrieval and RAG-style workflows
• tool-calling support for agent workflows
• OpenAI-style streaming responses for chat completions
• structured output and common OpenAI request-field passthrough
• verification-aware escalation instead of naive “hard task -> expensive model”
• transparent routing decisions
• privacy-aware defaults
• automatic local preference for obvious sensitive or code-like content
• automatic local-to-cloud fallback when a provider is unavailable
• cost and latency visibility
• token-speed visibility for chat requests
• provider and model selection that can evolve over time
• a foundation for agentic step-level routing later

Compatibility

RouteLabs is easiest to adopt when you already use one of these client styles:

• OpenAI Chat Completions via /v1/chat/completions
• OpenAI Responses via /v1/responses
• Anthropic Messages via /v1/messages
• OpenAI-style embeddings via /v1/embeddings

That means the common migration path is:

1. start RouteLabs locally
2. point your existing client at RouteLabs
3. keep your app surface mostly the same
4. gain local-first routing, fallback, and traces

How You Use It

There are three practical ways to adopt RouteLabs today.

1. As a local runtime/server

Run:

router start --reload

Then point your tools to http://127.0.0.1:8000.

2. As a Python library client

Use the built-in client:

from routelabs_router import RouteLabsClient

client = RouteLabsClient("http://127.0.0.1:8000")
print(client.route("Summarize a short product description"))

3. As an OpenAI-compatible or Anthropic-compatible endpoint

If you already have code using an OpenAI-style client, point it at RouteLabs via base_url. Use model="route-auto" when you want RouteLabs to choose the concrete backend model for each request.

That is one of the easiest ways to adopt it without rewriting your app.

If you already have Anthropic Messages API clients, point them at RouteLabs via base_url and call /v1/messages.

What It Looks Like

app / agent / extension
        |
        v
  RouteLabs Router
        |
        +--> policy + task complexity
        +--> privacy constraints
        +--> provider selection
        +--> verification hooks
        |
        +--> Ollama
        +--> llama.cpp
        +--> cloud provider

Quick Demo

Once the server is running, you can inspect decisions directly:

curl -X POST http://127.0.0.1:8000/v1/route \
  -H "Content-Type: application/json" \
  -d '{"task":"summarize a short product description","private":false}'

Expected shape:

{
  "target": "local",
  "provider": "ollama",
  "model": "qwen3:4b",
  "reason": "task is suitable for local-first execution",
  "complexity": "medium",
  "verify": true,
  "provider_available": true,
  "provider_status": "ready",
  "fallback_available": false,
  "fallback_status": "not_configured"
}

What this tells you:

• the router chose local
• it selected ollama
• it picked a model
• it marked the request as worth verification
• it reports whether the planned provider is actually reachable right now
• it reports whether cloud fallback is available if the local route fails

/v1/route is a planning endpoint, not an execution endpoint. It tells you what RouteLabs would try first and whether that path currently looks available.

And you can send an OpenAI-style chat request:

curl -X POST http://127.0.0.1:8000/v1/chat/completions \
  -H "Content-Type: application/json" \
  -d '{
    "messages":[{"role":"user","content":"Summarize this in one sentence: RouteLabs Router chooses between local and cloud models based on privacy, cost, latency, and task complexity."}],
    "private":false
  }'

If Ollama is running locally, that request executes against your configured local model. If OPENAI_API_KEY is set, high-complexity requests can route through the configured OpenAI-compatible cloud provider. The response includes a trace showing the initial route, verification result, and any escalation.

Newer OpenAI-style agent clients can also use /v1/responses:

curl -X POST http://127.0.0.1:8000/v1/responses \
  -H "Content-Type: application/json" \
  -d '{
    "model":"route-auto",
    "input":"Summarize RouteLabs Router in one sentence.",
    "private":false
  }'

Today, RouteLabs accepts these practical /v1/responses input shapes:

• a plain string in input
• a list of message-like items with role and content
• a list of type: "message" items with nested input_text content
• a top-level list of type: "input_text" items for simple text prompts

When stream=true, RouteLabs emits semantic Responses-style SSE events including:

• response.created
• response.output_text.delta
• response.output_text.done
• response.function_call_arguments.done when relevant
• response.completed

Anthropic-style clients can use /v1/messages:

curl -X POST http://127.0.0.1:8000/v1/messages \
  -H "Content-Type: application/json" \
  -d '{
    "model":"claude-sonnet-4-20250514",
    "max_tokens":256,
    "messages":[{"role":"user","content":"Summarize RouteLabs Router in one sentence."}],
    "private":false
  }'

When stream=true, RouteLabs emits Anthropic-style message events including:

• message_start
• content_block_start
• content_block_delta
• content_block_stop
• message_delta
• message_stop

Positioning

Tool	Core strength	What it does not solve
Ollama	Great local model runtime and API	Hybrid routing and policy decisions
LiteLLM	Cloud API normalization and routing	Local-first execution strategy
OpenRouter	Hosted provider access and fallback	On-device privacy-aware control plane
RouteLabs Router	Verification-aware local-first runtime with hybrid routing	Early-stage policy and provider coverage

MVP scope

The first version focuses on a narrow but useful slice:

• OpenAI-compatible chat-style request handling
• local/cloud routing decisions
• adapter-based execution
• verification-aware fallback hooks
• structured telemetry showing why a route was chosen

This repository intentionally starts small. It is a control-plane foundation, not a full chat app.

Use Cases

• Local-first copilots that should only escalate when a task gets difficult
• Privacy-sensitive workflows where private data should never leave the device
• Browser or desktop assistants that need one middleware layer above multiple runtimes
• Agent systems that want future step-level routing instead of a single fixed model

Current Status

This is an early but usable product foundation. The repository already includes:

• project docs
• roadmap
• contribution guide
• Python project metadata
• FastAPI server and CLI
• YAML config loading
• route inspection endpoint
• OpenAI-style /v1/chat/completions endpoint
• OpenAI-style /v1/embeddings endpoint
• OpenAI-compatible /v1/models discovery endpoint
• tool-call passthrough for OpenAI-style clients
• OpenAI-style SSE streaming on /v1/chat/completions
• structured-output passthrough and JSON-mode support
• real local execution through Ollama
• generic OpenAI-compatible cloud execution
• first verification-aware escalation loop
• automatic fallback from local provider failures to the cloud when policy allows it
• stats endpoint for local/cloud/escalation visibility
• runtime doctor and model inventory CLI commands
• simple estimated cost savings in stats
• latency and token-speed metrics in stats and logs
• heuristic privacy detection for email/identifier/code-like content
• recent route logs for per-request inspection
• test coverage for routing and API behavior
• example config profiles
• example curl flows

Still early:

• verifiers are heuristic and still early
• cost and latency dashboards are not implemented yet
• privacy detection is heuristic rather than model-based
• learning from user corrections is still future work

More Docs

• Architecture: docs/ARCHITECTURE.md
• Changelog: CHANGELOG.md
• Roadmap: ROADMAP.md
• Contributor guide: CONTRIBUTING.md
• Release guide: docs/release/README.md
• PyPI trusted publishing: docs/release/trusted-publishing.md

Setup And Usage

Prerequisites

• Python 3.11+
• conda recommended for the smoothest setup on macOS

Install from PyPI

conda create -n routelabs-router python=3.11 -y
conda activate routelabs-router
python -m pip install --upgrade pip
pip install routelabs-router

Install from source

Use this path if you want to contribute or modify the router itself.

git clone https://github.com/routelabsai/router.git
cd router
conda create -n routelabs-router python=3.11 -y
conda activate routelabs-router
python -m pip install --upgrade pip setuptools wheel
pip install -e '.[dev]'

Configure cloud execution

If you want cloud-routed requests to execute instead of returning a configuration error, set:

export OPENAI_API_KEY=your_api_key_here

The default cloud adapter uses the OpenAI-compatible endpoint configured in config/router.yaml.

Why conda is the recommended path

During validation we hit two common issues that conda + Python 3.11 resolved cleanly:

• Python 3.9.7 was too old for this project
• older packaging tooling made editable installs unreliable

If you see requires a different Python: 3.9.7 not in '>=3.11', create the conda environment above and retry.

Run tests

pytest

Optional profile configs

The repo includes starter profiles in config/profiles/:

• balanced.yaml
• local-first.yaml
• openclaw.yaml
• privacy-first.yaml
• unsloth-local.yaml

Use one as your active config by copying or merging it into config/router.yaml.

Start the runtime

router start --reload

On startup, RouteLabs now prints a quick readiness summary so users can immediately see:

• whether the local provider is reachable
• whether cloud fallback is configured
• whether the runtime is ok, degraded, or error
• what to do next if no provider path is available

Typical first-run warnings include:

• start Ollama with ollama serve for local execution
• set OPENAI_API_KEY to enable cloud fallback and escalation

For explicit host or port overrides:

router start --host 0.0.0.0 --port 8000 --reload

Inspect a routing decision

router route --task "summarize a short product description" --private false

Run environment checks

router doctor

This shows:

• local and cloud provider readiness
• configured chat and embedding models
• installed Ollama models when RouteLabs can detect them
• missing configured local models
• the next setup action if something is unavailable

List visible models

router models

This shows:

• virtual models like route-auto
• configured local and cloud models
• installed Ollama models discovered live
• whether each model is installed, configured, or not_configured

Test the API

Health check:

curl http://127.0.0.1:8000/healthz

Expected shape:

{
  "status": "ok",
  "providers": {
    "ollama": {
      "available": true,
      "status": "ready"
    },
    "openai-compatible": {
      "available": false,
      "status": "not_configured"
    }
  }
}

Health status semantics:

• ok: the local-first path is available
• degraded: local is unavailable, but cloud execution is still possible
• error: neither local nor cloud execution is currently usable

Route inspection:

curl -X POST http://127.0.0.1:8000/v1/route \
  -H "Content-Type: application/json" \
  -d '{"task":"summarize a short product description","private":false}'

Stats endpoint:

curl http://127.0.0.1:8000/v1/stats

It includes:

• chat vs embeddings request counts
• average total latency
• average chat latency
• average embeddings latency
• average local vs cloud latency
• average completion token speed for chat requests

Recent route logs:

curl http://127.0.0.1:8000/v1/logs

Each log entry includes:

• request kind
• total request latency
• completion tokens per second when available
• per-attempt timing in the trace

Model discovery:

curl http://127.0.0.1:8000/v1/models

Ecosystem workflows:

• OpenClaw: examples/openclaw.md
• Unsloth: examples/unsloth.md

Embeddings:

curl -X POST http://127.0.0.1:8000/v1/embeddings \
  -H "Content-Type: application/json" \
  -d '{
    "input":"RouteLabs Router chooses between local and cloud models based on privacy and task complexity.",
    "private":false
  }'

If local embeddings fail and cloud embeddings are not configured, RouteLabs now returns a clearer configuration error instead of a misleading “provider does not support embeddings” message.

Python client

You can also call the router from Python:

from routelabs_router import RouteLabsClient

client = RouteLabsClient("http://127.0.0.1:8000")

route = client.route("Summarize a short product description")
chat = client.chat(
    [
        {
            "role": "user",
            "content": "Summarize this in one sentence: RouteLabs Router chooses between local and cloud models based on privacy, cost, latency, and task complexity.",
        }
    ]
)
embeddings = client.embeddings(
    "RouteLabs Router chooses between local and cloud models based on privacy and task complexity."
)
stats = client.stats()
logs = client.logs()

There is also a runnable example in examples/python-client.py.

OpenAI-compatible drop-in example

If you already use the OpenAI Python SDK, you can point it at RouteLabs:

from openai import OpenAI

client = OpenAI(
    base_url="http://127.0.0.1:8000/v1",
    api_key="not-needed-for-local-dev",
)

response = client.chat.completions.create(
    model="route-auto",
    messages=[
        {
            "role": "user",
            "content": "Summarize this in one sentence: RouteLabs Router chooses between local and cloud models based on privacy, cost, latency, and task complexity.",
        }
    ],
)

See examples/openai-compatible-client.py. You may need to install the OpenAI SDK separately:

pip install openai

For a multi-step tool-calling example, see:

• examples/agent-loop.py
• examples/agent-loop.md

The stats response includes simple estimated fields such as:

• estimated_total_cost_usd
• estimated_baseline_cloud_cost_usd
• estimated_cost_saved_usd
• estimated_cloud_requests_avoided

OpenAI-style chat completion:

curl -X POST http://127.0.0.1:8000/v1/chat/completions \
  -H "Content-Type: application/json" \
  -d '{
    "messages":[{"role":"user","content":"Summarize this in one sentence: RouteLabs Router chooses between local and cloud models based on privacy, cost, latency, and task complexity."}],
    "private":false
  }'

If Ollama is running locally, the chat endpoint will execute against your configured local model. If OPENAI_API_KEY is set, high-complexity tasks can execute through the configured OpenAI-compatible cloud provider. If it is not set, cloud-routed chat requests return a clear configuration error. If the local provider is unavailable and the request is not forced to stay private, RouteLabs can now fall back to the cloud automatically and record that decision in the trace. The stats endpoint gives a simple first pass at the eventual cost/latency visibility story by showing how many requests stayed local, how many escalated, and how often verification failed. It also includes a lightweight savings estimate based on configurable per-request local and cloud cost assumptions. The logs endpoint exposes recent request-level decisions so users can inspect privacy detection, verification, escalation, final route choice, and estimated per-request cost directly.

Tool calling

RouteLabs now passes through OpenAI-style tools and tool_choice fields, which makes it more usable for agent loops and function-calling workflows.

Example:

curl -X POST http://127.0.0.1:8000/v1/chat/completions \
  -H "Content-Type: application/json" \
  -d '{
    "model":"route-auto",
    "messages":[{"role":"user","content":"What is the weather in Chicago?"}],
    "tools":[
      {
        "type":"function",
        "function":{
          "name":"get_weather",
          "description":"Get weather for a city",
          "parameters":{
            "type":"object",
            "properties":{"city":{"type":"string"}},
            "required":["city"]
          }
        }
      }
    ]
  }'

If the model decides to call a tool, the response returns OpenAI-style tool_calls in the assistant message.

Streaming

RouteLabs now supports OpenAI-style streaming on /v1/chat/completions when stream=true.

Example:

curl -N -X POST http://127.0.0.1:8000/v1/chat/completions \
  -H "Content-Type: application/json" \
  -d '{
    "model":"route-auto",
    "stream":true,
    "messages":[{"role":"user","content":"Summarize RouteLabs Router in one sentence."}]
  }'

This currently exposes an OpenAI-style SSE stream from the RouteLabs API layer so existing clients can consume streamed chunks normally.

Structured outputs and passthrough

RouteLabs now passes through several common OpenAI chat request fields so existing clients can switch over with fewer changes:

• response_format
• temperature
• top_p
• max_tokens
• stop
• seed
• frequency_penalty
• presence_penalty

For local Ollama execution, OpenAI-style structured output requests are mapped into Ollama-compatible JSON mode or JSON-schema mode where possible.

RouteLabs also validates structured outputs after generation. If a provider returns invalid JSON or violates the requested schema, RouteLabs treats that as an execution failure:

• local routes can fall back to cloud when policy allows it
• private or no-fallback routes return a clear error instead of silently returning malformed structured data

Current schema validation coverage includes:

• object shape and required fields
• scalar types
• enums
• additionalProperties: false
• string constraints like minLength, maxLength, and pattern
• array constraints like minItems and maxItems
• numeric bounds like minimum, maximum, exclusiveMinimum, and exclusiveMaximum

Example:

curl -X POST http://127.0.0.1:8000/v1/chat/completions \
  -H "Content-Type: application/json" \
  -d '{
    "model":"route-auto",
    "messages":[{"role":"user","content":"Return a JSON object with keys title and summary for RouteLabs Router."}],
    "response_format":{"type":"json_object"},
    "temperature":0.2,
    "max_tokens":120
  }'

Existing tool compatibility

RouteLabs now exposes the two OpenAI-style endpoints many existing tools check first:

• /v1/chat/completions
• /v1/embeddings
• /v1/models

That makes it easier to place RouteLabs in front of:

• OpenAI Python SDK clients
• LangChain ChatOpenAI clients configured with base_url
• Open WebUI connections that validate providers through /models

Privacy-aware behavior

The router can now automatically prefer local execution for requests that look like:

• emails or phone-like identifiers
• SSN-like or account-like identifiers
• secret-like tokens
• code-like content

This first version uses lightweight heuristics so it is easy to run locally. For a more advanced future detector, the project can integrate a model such as openai/privacy-filter.

Run with Ollama

Start Ollama, make sure the configured model exists, then run the server:

ollama serve
ollama pull qwen3:4b
router start --reload

The default local provider configuration lives in config/router.yaml.

Hybrid mode example

With both Ollama and OPENAI_API_KEY configured:

• simple tasks usually run locally
• private tasks prefer local execution
• high-complexity tasks can route to the cloud

Example cloud-leaning route check:

curl -X POST http://127.0.0.1:8000/v1/route \
  -H "Content-Type: application/json" \
  -d '{"task":"design architecture for a multi-step agent","private":false}'

More examples

• curl walkthrough: examples/curl-quickstart.md
• product framing and common scenarios: examples/use-cases.md
• agent loop walkthrough: examples/agent-loop.md

Example Routing Philosophy

• send simple, low-risk tasks to local models first
• prefer local execution when privacy rules require it
• escalate to stronger models when verification or confidence checks fail
• keep the decision trace visible so routing can be audited and improved

Near-Term Roadmap

• richer verification strategies beyond heuristics
• policy packs for privacy and cost controls
• better task classification and prompt-shape heuristics
• latency-aware telemetry and routing feedback loops
• benchmark harness for local vs cloud trade-off analysis

More detail lives in ROADMAP.md.

License

This scaffold uses the MIT License. See LICENSE.