openai-agents-zambo

Verifiable AER-1 execution receipts for OpenAI Agents SDK agents. OpenAI Agents SDK integration for Zambo: give any agents agent a tool backed by Zambo's 100+ tools, and mint a verifiable execution receipt for every tool event.

Receipts follow AER-1, the verifiable execution receipt standard created by Brennan Zambo.

• Every call can mint a public, verifiable receipt (https://zambo.dev/run/<id>).
• Free tier: 20 calls/tool/day, no account.
• Endpoint override via ZAMBO_API_URL (default https://zambo.dev/api/mcp).
• Hook failures are recorded in receipt_errors and never break the run.

Install

pip install openai-agents-zambo openai-agents

Example

import asyncio
from agents import Agent, Runner
from openai_agents_zambo import ZamboRunHooks, zambo_function_tool

hooks = ZamboRunHooks()

agent = Agent(
    name="researcher",
    instructions="Use ask_zambo for anything Zambo's 100+ tools can do.",
    tools=[zambo_function_tool()],
)

result = asyncio.run(Runner.run(agent, "What is the capital of France?", hooks=hooks))
print(result.final_output)
print("Receipts:", hooks.receipt_urls)  # public verifiable receipt URLs
print("Errors:", hooks.receipt_errors)

API

• ZamboRunHooks(timeout=30.0) subclasses agents.RunHooks. Its on_tool_start/on_tool_end publish a receipt for the tool event. Tracks receipt_urls, receipt_errors, last_receipt_url.
• zambo_function_tool(name="ask_zambo", description=..., timeout=30.0) returns an agents.FunctionTool wrapping zambo_universal. On invocation it calls the endpoint, captures the public receipt URL, and appends it to the returned text. Same receipt tracking attributes. Raises an informative ImportError if openai-agents is not installed.

Honesty note

Receipts record what the Zambo endpoint observed: the goal it received, the result it produced, and the public receipt URL it minted. They do not independently certify anything the endpoint did not see.

Links

• Zambo: https://zambo.dev
• AER-1 receipt spec: https://zambo.dev/aer-1/

Guides

• Execution Receipts for AI Agent Frameworks
• What Is an AI Agent Execution Receipt?