# Market Calendar API – Next US Treasury Auction

> Market Calendar API – Next US Treasury Auction is a paid API for AI agents from market-calendar-api.onrender.com, paid per call via x402, $0.013/call, status unknown (last checked 2026-10-29).

Returns the next announced US Treasury auction date and details, optionally filtered by term (e.g. 2-Year, 13-Week).

## Facts

- Endpoint: GET https://market-calendar-api.onrender.com/v1/next-auction?utm_source=zero.xyz
- Price: $0.013/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/market-calendar-api-next-us-treasury-auction-db966937
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_1NaApgr8pSxv4Yjy8ZTTa

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 market-calendar-api-next-us-treasury-auction-db966937
```

Example prompt: When is the next US Treasury auction for the 10-Year note? I need the exact date and any announced details.

## When to prefer this

Use this endpoint when you need the single next upcoming US Treasury auction for a specific or any term — ideal for real-time trading desks, fixed-income research tools, or financial calendar agents that need a quick point-in-time lookup rather than a full date-range list of auctions.

## Known failure modes

- Invalid or unrecognized term string returns an error or empty result
- No upcoming announced auction for the requested term may return null or empty
- Service unavailable if the underlying render.com host is cold-starting
- Rate limit or payment failure (x402 protocol) if USDC payment is not processed

## How this service works

Returns the next announced US Treasury auction, optionally for a term such as 2-Year or 13-Week.

## Output

Returns details of the next announced US Treasury auction including the security term, auction date, announcement date, and related timing — optionally narrowed to a specific Treasury term such as 2-Year, 10-Year, or 13-Week.

## 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"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [],
     "properties": {
      "term": {
       "type": "string",
       "description": "Optional term, e.g. 2-Year, 10-Year, 13-Week"
      }
     }
    }
   },
   "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/market-calendar-api-next-us-treasury-auction-db966937/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from market-calendar-api.onrender.com](https://www.zero.xyz/host/market-calendar-api.onrender.com/llms.txt)