# Dead Drop Key-Value Store (Put)

> Dead Drop Key-Value Store (Put) is a paid API for AI agents from dead-drop.chris15118-4cd.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-11-01).

Stores a value under a specified key in a dead-drop box, persisted for a configurable TTL, with write visibility after micropayment settlement.

## Facts

- Endpoint: POST https://dead-drop.chris15118-4cd.workers.dev/mcp?utm_source=zero.xyz#put
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-11-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/dead-drop-key-value-store-put-0a1d75f2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Wv6iC0vxMN_FnoKyTBLYS

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability dead-drop-key-value-store-put-0a1d75f2 -d '<json body>'
```

Example prompt: Store the string 'session-token-abc123' under the key 'auth_token' in my personal box ('me'), keeping it for 7200 seconds.

## When to prefer this

Choose this endpoint when an AI agent needs to temporarily park a value (up to 64 KB) under a named key for another agent or process to retrieve later, especially in micropayment-gated (x402) agentic workflows where ephemeral cross-agent data sharing is required and data does not need to outlast the configured TTL.

## Known failure modes

- Payment not settled — write remains invisible until payment clears
- Value exceeds 64 KB limit — request rejected
- TTL exceeds 604800 seconds (7 days) — capped or rejected
- Invalid or missing key/box identifier — bad request error
- Cloudflare Worker timeout or downstream error — 5xx response

## How this service works

Store a value under a key. Costs $0.002. Values up to 64 KB, kept for ttl_seconds (default 3600, max 604800). The write becomes visible once the payment has settled.

## Output

A confirmation that the write was accepted and will become visible once the $0.002 USDC micropayment has settled; typically includes acknowledgment of the key, box, and TTL applied.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/dead-drop-key-value-store-put-0a1d75f2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from dead-drop.chris15118-4cd.workers.dev](https://www.zero.xyz/host/dead-drop.chris15118-4cd.workers.dev/llms.txt)