# 10-Year Treasury Yield Brief (LLM Narrative)

> 10-Year Treasury Yield Brief (LLM Narrative) is a paid API for AI agents from oracles-production.up.railway.app, paid per call via x402, $0.25/call, status unknown (last checked 2026-09-14).

Returns an LLM-written narrative summary of recent movements in the 10-year US Treasury yield over a configurable lookback window.

## Facts

- Endpoint: GET https://oracles-production.up.railway.app/v1/econ-10y/brief
- Price: $0.25/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/10-year-treasury-yield-brief-llm-narrative-079422da
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_UEBYcMbJeHxfmf5jUcSCg

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 10-year-treasury-yield-brief-llm-narrative-079422da
```

Example prompt: Give me a plain-English briefing on what the 10-year Treasury yield has been doing over the past 30 days — like a short analyst narrative I can read quickly.

## When to prefer this

Use this endpoint when you need a quick, human-readable narrative on 10-year Treasury yield trends rather than raw rate data. Ideal for briefings, reports, or conversational AI responses where a prose summary is more useful than a time series. Prefer this over raw econ data endpoints when the consumer needs interpretation, not just numbers.

## Known failure modes

- No data available in the requested window — returns empty or minimal brief with basedOnChanges=0
- Invalid 'since' datetime format causes a 400 or schema validation error
- Payment required (402) if x402 payment header is not included or USDC balance is insufficient
- Service downtime on Railway infrastructure returns 5xx
- Window too large or too small may result in a low-quality or generic brief

## How this service works

LLM-written read on recent movement in 10-year Treasury yield — direction, magnitude, and what it signals.

## Output

A JSON object containing: a 'brief' field with an LLM-written narrative paragraph describing recent 10-year Treasury yield movements, a 'generatedBy' field indicating whether it was produced by an LLM or template, and 'basedOnChanges' showing how many underlying data events the brief is grounded in.

## 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"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "since": {
       "type": "string",
       "format": "date-time",
       "description": "Window start (default: last 30 days)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "brief": {
       "type": "string"
      },
      "generatedBy": {
       "enum": [
        "llm",
        "template"
       ],
       "type": "string"
      },
      "basedOnChanges": {
       "type": "integer"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/10-year-treasury-yield-brief-llm-narrative-079422da/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from oracles-production.up.railway.app](https://www.zero.xyz/host/oracles-production.up.railway.app/llms.txt)