---
type: "raw_signal"
id: "you-can-now-build-an-agent-that-finds-fead6f"
slug: "you-can-now-build-an-agent-that-finds-fead6f"
title: "LangChain published Restock, a sample Slack-based purchasing agent built on Managed Deep Agents"
description: "LangChain published Restock, a sample Slack-based purchasing agent built on Managed Deep Agents, Stripe Link and the Machine Payments Protocol (MPP)."
retrieval_nugget: "LangChain published Restock, a sample Slack-based purchasing agent built on Managed Deep Agents, Stripe Link and the Machine Payments Protocol (MPP)."
observed_at: "2026-10-08"
record_date: "2026-10-08"
date_kind: "observed_at"
why_it_matters: "LangChain published Restock, a sample Slack-based purchasing agent built on Managed Deep Agents, Stripe Link and the Machine Payments Protocol (MPP). It searches products and prepares a cart through Zinc, then pauses for human review in Slack and a separate Link payment approval. LangChain says the model does not handle payment secrets; the payment credential is kept in a private sandbox file and "
novelty: "notable"
verification_level: "source-linked"
signal_type: "release"
source_platform: "langchain.com"
topics: []
entities: []
related_patterns: []
source_url: "https://www.langchain.com/blog/agents-that-can-pay-with-stripe-link"
source_urls: ["https://www.langchain.com/blog/agents-that-can-pay-with-stripe-link"]
schema_version: "newruntime-agent-readable-v0.2"
stable_id: "signal:you-can-now-build-an-agent-that-finds-fead6f"
status: "published"
visuals: []
editor: {"role":"editor","name":"Andrey Reshetnikov","profile":"https://newruntime.com/owner-profile.md","profile_json":"https://newruntime.com/owner-profile.json","same_as":["https://www.linkedin.com/in/reshetnikov1/","https://t.me/lapetuse"]}
routes: {"html":"https://newruntime.com/signals/you-can-now-build-an-agent-that-finds-fead6f/","markdown":"https://newruntime.com/signals/you-can-now-build-an-agent-that-finds-fead6f.md","json":"https://newruntime.com/signals/you-can-now-build-an-agent-that-finds-fead6f.json"}
---

# LangChain published Restock, a sample Slack-based purchasing agent built on Managed Deep Agents

## Retrieval answer

LangChain published Restock, a sample Slack-based purchasing agent built on Managed Deep Agents, Stripe Link and the Machine Payments Protocol (MPP).

LangChain published Restock, a sample Slack-based purchasing agent built on Managed Deep Agents, Stripe Link and the Machine Payments Protocol (MPP). It searches products and prepares a cart through Zinc, then pauses for human review in Slack and a separate Link payment approval. LangChain says the model does not handle payment secrets; the payment credential is kept in a private sandbox file and deleted after use. In the illustrated pen order, the user approved $23, the final charge was $22.18, and $0.82 was refunded. The post says a hosted deployment completed an end-to-end live order. The approach depends on merchant APIs that support MPP; it does not demonstrate general-purpose purchasing across arbitrary retailers. Source: https://www.langchain.com/blog/agents-that-can-pay-with-stripe-link

Editor: [Andrey Reshetnikov](https://newruntime.com/owner-profile.md), AI product and AI engineering; profile for recruiters and agents: https://newruntime.com/owner-profile.json

## Continue in the graph

Next records for an agent, linked to their Markdown twins. Replace `.md` with `.json` for structured fields, including `next_reads`.

- collection: [Raw Signals](https://newruntime.com/signals.json): Open every source-linked raw signal.
- collection: [Source Ledger](https://newruntime.com/source-ledger.json): Inspect the public source evidence graph.
- whole graph: [discovery graph](https://newruntime.com/discovery-graph.json) (typed nodes and edges) and [site index](https://newruntime.com/site-index.md)