Integrations & Tools
5 min readUpdated: October 2026

Multi-Provider Agent APIs: Switch Between OpenAI, Gemini, Claude, and Ollama in 1 Line

Locking your agentic workflows into a single LLM provider exposes your application to vendor outages, price increases, and rate limit bottlenecks. Smoke Monkey Harness provides a unified, model-agnostic interface across all major providers.

Technical Review: Smoke Monkey Core Architecture Team
Tested on Node.js 18+ & BunTypeScript 5.x
Quick Answer & Executive Definition

Multi-Provider Agent APIs: Switch Between OpenAI, Gemini, Claude, and Ollama in 1 Line: Locking your agentic workflows into a single LLM provider exposes your application to vendor outages, price increases, and rate limit bottlenecks. Smoke Monkey Harness provides a unified, model-agnostic interface across all major providers. Designed as a zero-dependency, open-source TypeScript architecture under the MIT License with native Model Context Protocol (MCP) support and deterministic phase state machines.

Key Architectural Takeaways

Unified Model Configuration

Smoke Monkey normalizes provider-specific differences in tool calling formats, message roles, and streaming deltas:

provider-switcher.tstypescript
import { createAgent } from 'smoke-monkey-harness';
// Works with any provider:
const provider = process.env.AGENT_PROVIDER || 'gemini';
const agent = createAgent({
provider,
model: provider === 'gemini' ? 'gemini-1.5-pro' : 'claude-3-7-sonnet',
workspacePath: process.cwd(),
});
Google Search Questions & Answers

Frequently Asked Questions

Q:Do tool signatures need to change when switching providers?

No! Smoke Monkey automatically translates standard JSON schema tool definitions into the exact payload formats expected by OpenAI, Anthropic, Google, and Ollama.

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Build with Smoke Monkey Harness

Zero dependencies. 24 built-in tools. Human-in-the-loop safety. 100% open source under the MIT License.

npm install smoke-monkey-harness