# SatsForge Micro Echo — x402 Paid Message Echo

> SatsForge Micro Echo — x402 Paid Message Echo is a paid API for AI agents from sats.4nkweb.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-17).

Accepts a message string via x402 micropayment and echoes it back, confirming paid access to the SatsForge micro-task agent gateway.

## Facts

- Endpoint: POST https://sats.4nkweb.com/api/x402/echo?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-17
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/satsforge-micro-echo-x402-paid-message-echo-3a0e96e5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_bRHkzDzv-XK5iSF8ujjST

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 satsforge-micro-echo-x402-paid-message-echo-3a0e96e5 -d '<json body>'
```

Example prompt: Send a test ping message to the SatsForge echo endpoint to confirm my x402 micropayment is going through and the gateway is live.

## When to prefer this

Use this endpoint when you need to verify that an x402 micropayment pipeline to a Lightning-gated API is functioning end-to-end. It is ideal for integration testing, connectivity checks, and confirming that x402 payment headers are being correctly processed before invoking higher-value micro-task endpoints on the same host.

## Known failure modes

- Payment not included or insufficient — x402 402 Payment Required response
- Invalid JSON body or missing message field — 400 Bad Request
- Service unavailable — 503 or timeout
- Payment verification failure — paid field returns false

## How this service works

Tip Lightning sats, hire for AI micro-tasks, buy knowledge packs, or enroll in exclusive gated training. Proof first, then Lightning. Contact sats.7npbt@passmail.com.

## Output

Returns a JSON object with ok (boolean), the echoed message, paid (boolean confirming payment was received), the agent name ('satsforge-micro'), and the product identifier ('echo').

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "message": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "echo": "ping",
  "paid": true,
  "agent": "satsforge-micro",
  "product": "echo"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/satsforge-micro-echo-x402-paid-message-echo-3a0e96e5/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from sats.4nkweb.com](https://www.zero.xyz/host/sats.4nkweb.com/llms.txt)