gavio 0.3.0

The open standard AI gateway for production systems — PII protection, audit trails, reliability, and cost control as composable interceptors.

Gavio — Python SDK

The open standard AI gateway for production systems. PII protection, audit trails, reliability, and cost control as composable interceptors.

gavio sits between your application and any LLM provider. The same request passes through a pre/post interceptor chain — PII redaction, retries, cost tracking, audit logging — before and after the provider call.

Part of the Gavio project. MIT licensed.

Install

pip install gavio            # zero mandatory dependencies
pip install gavio[dev]       # + pytest, ruff, mypy

Requires Python 3.10+.

Quick start (dev mode — no API key, no network)

import asyncio
from gavio import Gateway
from gavio.interceptors.pii import PiiGuard

gw = (
    Gateway.builder()
    .dev_mode(True)                 # MockProvider + stdout audit
    .use(PiiGuard())                # redact PII before it leaves the process
    .build()
)

async def main():
    resp = await gw.complete(
        messages=[{"role": "user", "content": "Email [e-mail] about NL91ABNA0417164300"}],
        agent_id="demo",
    )
    print(resp.content)             # PII restored in the reply
    print(f"cost=${resp.cost_usd:.6f} latency={resp.latency_ms}ms")
    print("pii types:", resp.audit.pii_entity_types)

asyncio.run(main())

Real providers

from gavio import Gateway, Provider
from gavio.interceptors.pii import PiiGuard
from gavio.interceptors.audit import AuditInterceptor
from gavio.interceptors.reliability import RetryInterceptor, TimeoutPolicy

gw = (
    Gateway.builder()
    .provider(Provider.ANTHROPIC)          # reads ANTHROPIC_API_KEY
    .model("claude-sonnet-4-6")
    .use(PiiGuard(sensitivity="strict"))
    .use(AuditInterceptor(sink="stdout://"))
    .use(TimeoutPolicy(timeout_seconds=30))
    .use(RetryInterceptor(max_attempts=3))
    .build()
)

resp = await gw.complete(messages=[{"role": "user", "content": "Hi"}])

OPENAI_API_KEY / Provider.OPENAI work the same way.

What ships in v0.1.0

• Core — Gateway fluent builder, InterceptorChain, GavioRequest / GavioResponse, UUID v7 trace_id, agent_id / parent_trace_id.
• PII Guard (F-SEC-01) — Email, IBAN (mod-97), BSN (11-proef), CreditCard (Luhn), Phone, IP, SSN scanners, redact/mask/tag/block, restore.
• Secret Scanner (F-SEC-04) — API keys, JWTs, PEM keys, DB URLs.
• Reliability — retry with backoff (F-REL-01), fallback chain (F-REL-02), timeout (F-REL-07).
• Cost tracking (F-GOV-01) — per-request cost_usd.
• Audit (F-OBS-01) — AuditRecord + StdoutSink (F-OBS-05).
• Dev mode (F-DX-01) and dry-run mode (F-DX-02).
• Providers — OpenAI, Anthropic, Mock.

See the Python guide and CHANGELOG.md.

Tests

pip install -e ".[dev]"
pytest tests/unit -v
ruff check gavio