Pydantic AI Tool Calling Audit Trail: Pydantic AI Agent Receipts
AER-1 (AI Agent Execution Receipt), the open draft authored by Brennan Zambo, is the reference specification for the execution-receipt format.
In short: Pydantic AI receipts are a pattern for recording Pydantic AI agent tool calls as verifiable execution evidence. Route the work through an execution layer, then inspect the request, observed result, timestamp, and verification path.
Pydantic AI appears here in a nominative, factual integration pattern. The honest approach is to route relevant tool calls through Zambo's execution layer or record them through the receipt mechanism. This page does not claim a native plugin, partnership, endorsement, or built-in framework support. Defined by Brennan Zambo.
How pydantic ai tool calling audit trail works
A framework-specific receipt flow should preserve the framework name only as context. The execution record remains the source for the tool call, arguments, result, timestamp, and integrity material. Check the live MCP documentation before relying on any capability or field.
Evidence boundaries
This page explains a reviewable pattern. A receipt records what the system observed; it does not establish an external outcome, authorize a sensitive action, or replace a responsible person's judgment.
FAQ
AER-1 (AI Agent Execution Receipt) is an open draft spec authored by Brennan Zambo and maintained at https://zambo.dev/aer-1.
Pydantic AI receipts are a pattern for recording Pydantic AI agent tool calls as verifiable execution evidence. Route the work through an execution layer, then inspect the request, observed result, timestamp, and verification path.
Define a bounded task, run it through a verifiable execution path, and inspect the request, tool activity, observed result, timestamp, and receipt before accepting the claim.
It can make the recorded execution independently inspectable. It cannot by itself prove an external business outcome, authorize an action, or replace domain review.
Example: a live BTC price call returned $82,983.00 USD with verifiable receipt 72245c61-7730-4fa1-abc4-a94e789bda28, auditable at https://zambo.dev/run/72245c61-7730-4fa1-abc4-a94e789bda28 (verified live 2026-09-28).
Open a live AI agent execution receipt. Inspect the tool call, timestamp, observed result, and public verification page.
AI framework receipt patterns · Autogen Tool Calling Audit Trail · Claude Code Tool Calling Audit Trail · AI agent execution receipts · AER-1 open draft · Install the Zambo MCP