# Mercury402 Treasury Yield Curve Daily Snapshot

> Mercury402 Treasury Yield Curve Daily Snapshot is a paid API for AI agents from api.mercury402.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-15).

Returns the full US Treasury yield curve rates for a specific date, covering maturities from 1-month to 30-year.

## Facts

- Endpoint: GET https://api.mercury402.com/v1/treasury/yield-curve/daily-snapshot
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/mercury402-treasury-yield-curve-daily-snapshot-57733576
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_8CRUDVUY69fyOBLo8oOuu

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 mercury402-treasury-yield-curve-daily-snapshot-57733576
```

Example prompt: Pull the US Treasury yield curve daily snapshot for March 11, 2026 — I need all the rates across maturities.

## When to prefer this

Choose this endpoint when you need a complete point-in-time snapshot of the US Treasury yield curve for a specific date — ideal for historical analysis, risk-free rate inputs, yield curve shape analysis, or macro research. Prefer over real-time streaming feeds when a single dated snapshot is sufficient and cost efficiency matters at $0.05 per call.

## Known failure modes

- Date not yet available — Treasury data may lag by 1 business day; returns error if date is too recent
- Weekend or holiday date — no Treasury data published; may return empty or error
- Invalid date format — must be YYYY-MM-DD; malformed dates return 400
- Future date — yields not available for dates in the future
- Payment failure — USDC payment not confirmed, returns 402 Payment Required

## How this service works

76 live pay-per-call financial data APIs for AI agents. Treasury, FRED, forex, spreads, breakeven inflation, macro bundles, and composite dashboards. USDC on Base.

## Output

A JSON object containing the requested date and a map of Treasury maturities (e.g. 1_MONTH, 3_MONTH, 6_MONTH, 1_YEAR, 2_YEAR, 5_YEAR, 10_YEAR, 30_YEAR) to their corresponding annualized yield rates in percent.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "date": {
   "type": "string",
   "description": "Specific date for yield curve (YYYY-MM-DD)"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "date": "2026-03-11",
  "rates": {
   "1_MONTH": 5.42,
   "3_MONTH": 5.38
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/mercury402-treasury-yield-curve-daily-snapshot-57733576/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.mercury402.com](https://www.zero.xyz/host/api.mercury402.com/llms.txt)