# Nexari Letter Send (Germany)

> Nexari Letter Send (Germany) is a paid API for AI agents from x402.nexari.cloud, paid per call via x402, $2.99/call, status unknown (last checked 2026-10-02).

Submits a previously quoted physical letter for printing and mailing via Deutsche Post within Germany, completing the two-step send flow using a quote_id.

## Facts

- Endpoint: POST https://x402.nexari.cloud/letter/send/:quote_id?utm_source=zero.xyz
- Price: $2.99/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/nexari-letter-send-germany-304db3d0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_VTAkSux6FEQdgNP0AyM0G

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 nexari-letter-send-germany-304db3d0 -d '<json body>'
```

Example prompt: I already got a quote for the letter to Frau Schmidt at Musterstraße 12, 10115 Berlin — go ahead and send it now using quote ID q_abc123.

## When to prefer this

Use this endpoint when you need to physically mail a letter to a recipient within Germany and have already obtained a valid quote via POST /letter/quote. This is the only endpoint in this service that actually triggers the mailing and processes the $2.99 USDC payment. Prefer this over digital communication alternatives when a physical paper letter is legally required, formally expected, or when the recipient cannot be reached digitally.

## Known failure modes

- Invalid or expired quote_id returns an error — quotes may have a validity window
- Payment not completed or USDC balance insufficient blocks the request
- Missing required path parameter quote_id results in a 404 or 400 error
- Letter content referenced in the quote may be rejected if it violates postal content rules
- Service unavailability from the Deutsche Post integration causes a 5xx error

## How this service works

Briefversand in Deutschland: gedruckt und per Deutsche Post versendet. Erst POST /letter/quote (gratis), dann mit quote_id bezahlen. Physical letter mailing within Germany. Get a free quote first.

## Output

A confirmation that the letter order has been received and dispatched for printing and mailing via Deutsche Post within Germany, along with an order identifier that can be used to check delivery status via the sibling status endpoint.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "properties": {}
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST",
      "PUT",
      "PATCH"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    },
    "pathParams": {
     "type": "object",
     "required": [
      "quote_id"
     ],
     "properties": {
      "quote_id": {
       "type": "string"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/nexari-letter-send-germany-304db3d0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.nexari.cloud](https://www.zero.xyz/host/x402.nexari.cloud/llms.txt)