---
title: "Agent-to-Agent Mailbox (message passing) ($0.002/call)"
method: GET
path: "/drop"
tags: ["coordination", "mailbox", "queue", "pubsub", "agent", "handoff", "agent-to-agent", "message-passing", "pipeline"]
---

# Agent-to-Agent Mailbox (message passing) ($0.002/call)

`GET /drop`

## Request

- Base URL: `https://x402.shizu.me`
- URL: `https://x402.shizu.me/drop`
- Auth: none declared

Send data from one agent to another with no shared infrastructure. POST {channel, message} leaves JSON in a named mailbox; the receiving agent GETs ?channel= to pop it (FIFO). A scraper agent hands results to an analyst agent that runs an hour later; a pipeline passes work downstream — no queue to host, no server. Message up to 8KB, 1000 queued per channel.

Paid endpoint: $0.002 per call via the x402 protocol (USDC on Base). An unpaid request returns 402 with payment requirements in the PAYMENT-REQUIRED response header; attach payment and retry.

## Query parameters

- `channel` string

## Response `200`

Paid result (JSON)

## Other responses

- `402`: Payment required — x402 requirements in the PAYMENT-REQUIRED response header

---

[API](https://skmtc.dev/shizu/apis/scrape402.md) · [All operations](https://skmtc.dev/shizu/apis/scrape402/llms.txt) · [OpenAPI document](https://skmtc.dev/shizu/apis/scrape402/revisions/0852d74798b8?raw)