# x402helper.xyz Derivatives Basis Rate Lookup

> x402helper.xyz Derivatives Basis Rate Lookup is a paid API for AI agents from x402helper.xyz, paid per call via x402, $0.009/call, status unknown (last checked 2026-10-31).

Returns basis rate and market data for a crypto derivatives asset (BTC, ETH, SOL) via a pay-per-call x402 micropayment endpoint.

## Facts

- Endpoint: GET https://x402helper.xyz/89e509/derivs/basis?utm_source=zero.xyz
- Price: $0.009/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402helper-xyz-derivatives-basis-rate-lookup-3e06fe17
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_z_8CRXK91XZL68xLP3Ump

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 x402helper-xyz-derivatives-basis-rate-lookup-3e06fe17
```

Example prompt: What is the current derivatives basis rate for BTC? I want the latest basis spread data for BTC-PERP.

## When to prefer this

Use this endpoint when you need fast, pay-per-call derivatives basis rate data for major crypto assets (BTC, ETH, SOL) and want to avoid subscription overhead. Best suited for AI agents that need on-demand spot checks of perp basis spreads without committing to a data subscription.

## Known failure modes

- Missing required 'symbol' query parameter returns an error
- Invalid or unsupported ticker symbol may return empty or error result
- Payment not processed (402) if USDC micropayment is not attached
- Network timeout or server error returns a non-200 response
- OFAC-screened address may be rejected before data is returned

## How this service works

X402 micropayments server — AI agents pay USDC for OFAC screening, rates, and billing verification.

## Output

A JSON object with a 'success' boolean and a 'result' object containing basis rate and derivatives market data for the requested asset symbol.

## 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",
     "required": [
      "symbol"
     ],
     "properties": {
      "symbol": {
       "type": "string",
       "default": null,
       "description": "Base asset ticker (BTC, ETH, SOL). A quote suffix such as BTC-USD or BTC-PERP is accepted and normalized server-side."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "result": {},
  "success": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402helper-xyz-derivatives-basis-rate-lookup-3e06fe17/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402helper.xyz](https://www.zero.xyz/host/x402helper.xyz/llms.txt)