How to Use the API Design Prover MCP in OpenAI Agents SDK

Q: Where do I register the API Design Prover MCP Server in my OpenAI Agents SDK code?

Instantiate MCPServerStreamableHttp pointing to the Vinkius endpoint inside an async context manager. Then, pass that instance in the mcpservers list when initializing your Agent object. The SDK auto-discovers the schema validation tools instantly.

Stop OpenAI Agents SDK from building broken endpoints by forcing design proofing before execution.

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Connect API Design Prover MCP to OpenAI Agents SDK

Create your Vinkius account to connect API Design Prover to OpenAI Agents SDK and route execution through our secure gateway. The platform manages server hosting, runtime updates, and security layers. Configuration requires no manual server provisioning.

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Setup API Design Prover with OpenAI Agents SDK

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Enforce REST standards in OpenAI Agents SDK

Your autonomous agent shouldn't write code for unmapped endpoints. When you run `validate_api_design`, this MCP Server forces the agent to map HTTP verbs and set up proper RFC 7807 error contracts before writing any Python code. This guardrail stops OpenAI agents from hallucinating random payload shapes. It guarantees that every endpoint generated matches Stripe-style standards before your agent hands off to the deployment phase.

Prevent unbounded payloads in production runs

Without strict limits, your production system will crash under heavy database loads. Running `validate_api_design` ensures your agent defines maximum page sizes and response envelopes before any backend services get provisioned. You get clean, predictable pagination rules. This prevents your autonomous agent from creating API endpoints that dump entire tables into a single JSON response.

Trace API designs directly in OpenAI Dashboard

Stop guessing why your agent decided on a specific payload structure. By passing this MCP Server to your agent list, every execution of `validate_api_design` gets logged directly in your tracing dashboard. You can inspect the exact versioning strategy and deprecation policies your agent proposed. If a design fails validation, the error trace shows you exactly which RFC 7807 spec requirement was violated.

Setup guide

Set up API Design Prover MCP in OpenAI Agents SDK

Prerequisites

Python 3.10+ installed
openai-agents package (pip install openai-agents)
Active Vinkius subscription with a valid endpoint token

1

Install the SDK

Run pip install openai-agents to install the OpenAI Agents SDK. The MCP integration is built-in — no extra dependencies needed.
2

Connect via SSE transport

Use MCPServerSse with your Vinkius endpoint URL. Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com. The SDK auto-discovers all API Design Prover tools at runtime.
3

Create your Agent

Pass the MCP to Agent(mcp_servers=[server]). The agent receives API Design Prover tools as native definitions — JSON schemas resolve automatically.
4

Run the agent

Call Runner.run(agent, prompt) to execute. The agent invokes the appropriate API Design Prover tools and returns structured results. Copy the full example on the right to get started.

agent.py

import asyncio
from agents import Agent, Runner
from agents.mcp import MCPServerSse

async def main():
    async with MCPServerSse(
        url="https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    ) as server:
        agent = Agent(
            name="API Design Prover Agent",
            instructions="You have access to API Design Prover tools.",
            mcp_servers=[server],
        )
        result = await Runner.run(agent, "List recent transactions")
        print(result.final_output)

asyncio.run(main())

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Common questions about API Design Prover MCP in OpenAI Agents SDK

It intercepts the agent's generation loop by requiring a successful run of `validate_api_design`. The tool acts as a strict gateway that rejects any design missing pagination, versioning, or standard error envelopes. Your agent cannot proceed to write backend code until this validation passes.

Yes, every validation check runs as a discrete tool call that logs directly to your OpenAI tracing dashboard. You will see the exact payload the agent sent to `validate_api_design` along with the validation failure details. This makes debugging agent reasoning loops incredibly straightforward.

Instantiate `MCPServerStreamableHttp` pointing to the Vinkius endpoint inside an async context manager. Then, pass that instance in the `mcp_servers` list when initializing your `Agent` object. The SDK auto-discovers the schema validation tools instantly.

The validation tool requires an explicit versioning strategy before it passes. When one agent designs the API and hands off to a coding agent, the deprecation policy is already baked into the system prompt context. This prevents downstream coding agents from using deprecated endpoints.

Your raw API endpoint designs and payload schemas are processed in ephemeral V8 isolates. Vinkius never writes these design drafts to persistent storage. All schema validation occurs in-memory and is discarded immediately after the tool execution completes.

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