# SperaxOS Limitless Get Price Curve

> SperaxOS Limitless Get Price Curve is a paid API for AI agents from chat.sperax.io, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-12).

Returns a sampled price curve for a Limitless prediction market, showing how the price moves as a function of USD stepped out up to a specified maximum.

## Facts

- Endpoint: POST https://chat.sperax.io/api/x402/tools/limitless/getPriceCurve?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/speraxos-limitless-get-price-curve-d398af69
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_jBS-UtntNAsUCRycevr-P

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 speraxos-limitless-get-price-curve-d398af69 -d '<json body>'
```

Example prompt: Can you fetch the price curve for Limitless market 0xabc123 stepping out up to $500 with 100 sample points so I can see how the price moves with liquidity?

## When to prefer this

Use this endpoint when you need to understand the price dynamics or liquidity depth of a specific Limitless prediction market before executing a trade, or when building visualizations of AMM bonding curves. Prefer this over generic DeFi price APIs when working specifically with Limitless markets and needing sampled curve data rather than a single spot price.

## Known failure modes

- Invalid or non-existent marketId returns an error or empty response
- Payment failure via x402 protocol if USDC balance is insufficient
- Malformed request body (missing marketId) results in a validation error
- Network or RPC timeout if the underlying Limitless protocol is unresponsive
- Extremely large sample counts may cause slow responses or timeouts

## How this service works

AI-powered DeFi intelligence APIs payable via the x402 HTTP payment protocol. No API key required — pay per request with USDC on Base. Identity-only (SIWX) endpoints are free for wallets with an agentcash identity.

## Output

Returns an array of sampled price points representing the price curve of the Limitless prediction market, showing how price changes incrementally as USD is stepped out from zero up to the specified maxUsd, with resolution determined by the samples parameter.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "maxUsd": {
   "type": "number",
   "description": "Max USD to step out. Default 1000."
  },
  "samples": {
   "type": "number",
   "description": "Curve resolution. Default 50."
  },
  "marketId": {
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/speraxos-limitless-get-price-curve-d398af69/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from chat.sperax.io](https://www.zero.xyz/host/chat.sperax.io/llms.txt)