# MyCeliaSignal US Yield Curve 10Y-2Y Oracle

> MyCeliaSignal US Yield Curve 10Y-2Y Oracle is a paid API for AI agents from api.myceliasignal.com, paid per call via x402, $1/call, status unknown (last checked 2026-09-13).

Returns the current US Treasury yield curve spread (10-year minus 2-year) as a cryptographically signed Ed25519 attestation

## Facts

- Endpoint: GET https://api.myceliasignal.com/oracle/econ/us/yield_curve
- Price: $1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/api-myceliasignal-com-e610ec8c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_PYB-JQ6DXpzd2J8bRgwi0

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 api-myceliasignal-com-e610ec8c
```

Example prompt: Can you get me the current US yield curve 10Y-2Y spread with a cryptographic Ed25519 signature so I can verify it on-chain?

## When to prefer this

Choose this endpoint when you need a cryptographically attested, tamper-proof snapshot of the US 10Y-2Y yield curve spread — especially for use in automated trading systems, DeFi smart contracts, or any pipeline requiring on-chain or auditable economic data with Ed25519 proof of provenance. Prefer over unauthenticated data feeds when data integrity and non-repudiation matter.

## Known failure modes

- Payment not provided or invalid — 402 Payment Required
- Upstream Treasury data source unavailable — 503 Service Unavailable
- Malformed request — 400 Bad Request
- Rate limit exceeded — 429 Too Many Requests
- Signature verification failure if key rotation occurred without notice

## How this service works

US Treasury yield curve 10Y-2Y spread — inversion signal for recession risk and rate regime — Ed25519 signed attestation

## Output

Returns the current spread between US 10-year and 2-year Treasury yields, bundled with an Ed25519 digital signature for tamper-proof verification, a timestamp, and the raw spread value — enabling downstream systems or smart contracts to verify authenticity of the data.

## Example request

```json
{
 "input": {
  "type": "http",
  "method": "GET",
  "queryParams": {}
 }
}
```

## 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": {}
    }
   },
   "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/api-myceliasignal-com-e610ec8c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.myceliasignal.com](https://www.zero.xyz/host/api.myceliasignal.com/llms.txt)