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Agent Feedback tells you whether your product actually worked for the autonomous agents calling it. Instrument your API, website, or MCP server once with any of the first-class SDKs, and every eligible response will carry a lightweight feedback contract that a feedback-aware agent runtime can use to report its outcome — no changes to your handlers, no blocking network calls, no agent accounts required.

Quickstart

Instrument your first endpoint in under five minutes

How It Works

Understand the protocol flow from response to outcome review

SDK Guides

Node, Python, Go, Rust, and MCP integration guides

API Reference

Explore the public endpoints for outcomes and telemetry

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Why Agent Feedback?

AI agents calling your product make decisions independently. Traditional analytics tell you what was called — Agent Feedback tells you whether it actually worked. When an agent completes a task, it reports a concise outcome (success, partial, or failure) along with a single explanatory sentence. That signal flows directly into your dashboard, scoped to your workspace and product.

Zero Latency

Capability tokens are signed locally — your product response never waits for a network call

Privacy First

Only outcome and a short note are collected — no prompts, transcripts, or personal data

Protocol First

One canonical signing algorithm works across every language and framework

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Supported Integrations

Node — Express, Fastify, MCP

One global middleware for Express or Fastify; instrumentMcp for MCP servers

Python — ASGI & WSGI

Dependency-free middleware for FastAPI, Starlette, Flask, and Django

Go — net/http

Standard-library middleware using only built-in packages

Rust — Axum & Tower

Tower layer for Axum with a bounded Tokio background queue

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Get Started in Three Steps

1

Create a product in the dashboard

Sign in, create a workspace, and add your first product to get an API key in the format af_live_....
2

Add the middleware

Install the SDK for your framework and add one line of middleware — no handler changes required.
3

Watch outcomes arrive

Deploy and let agents call your product. Outcome reviews appear in your dashboard as agents report results.