Perp Gap API

Name: Perp Gap API
Price: 0.01 USDC
Availability: InStock

Use when an agent needs the best live price for a stock across venues before trading. For 1-10 tickers: perp mark and mid on trade.xyz (Hyperliquid), Aster, Lighter and OKX, xStocks and Ondo token prices per share, last US close, the session reference price, gap % vs it, cross-venue spread, best bid/ask and freshness. Unpaid calls get 402; bad or unknown tickers get 400/404 before any charge. Errors: 400, 402, 404, 502. Data, not advice.

TradingLiveeip155:8453Exactvia cdp

https://perp-gap-api.perpgap.workers.dev/quote

TradingDataStocksPerpsTokenized-stocks

Calls · 30d

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 3 snapshots so far.

$0.77

Verified settled volume

37 settlements proven x402 by their on-chain EIP-3009 marker.

$0.010

Listed price

As published in the catalog. Always read the live 402 before paying.

Calls · 30d

Upstream's own call count for this endpoint, not ours.

Unique payers · 30d

Last called 2026-10-23 07:13Z

—

Upstream on-chain volume

Reported by the source catalog.

Paid to

0x2d82dcB9cC3a168d9Ab25b62C1E33E278A51254F

The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.

Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Provider

The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

0.01USDC≈ $0.01 USD

on Base · exact scheme

Pay 0.01 USDC on Base to 0x2d82…1254F. The signed payment is good for 2 minutes.

Paid to: 0x2d82…1254F
USD Coin contract: 0x8335…02913
Payment window: 2 minutes
As published: 10000 smallest units

10000units

on solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to: 5MoL8H…LrEja
Token contract: EPjFWd…TDt1v
Payment window: 2 minutes

The catalog’s raw entry

[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x2d82dcB9cC3a168d9Ab25b62C1E33E278A51254F",
    "amount": "10000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 120
  },
  {
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "extra": {
      "feePayer": "BFK9TLC3edb13K6v4YyH3DwPb5DSUpkWvb7XnqCL9b4F"
    },
    "payTo": "5MoL8HNnvZUogGrqiF4T1StmAUpdU7ERA2GUJ7gLrEja",
    "amount": "10000",
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "maxTimeoutSeconds": 120
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "ticker": "NVDA"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "as_of": "2026-10-22T21:41:01.558Z",
          "perps": {
            "okx": {
              "ask": 213.17,
              "bid": 213.16,
              "mid": 213.165,
              "last": 213.17,
              "mark": 213.16,
              "symbol": "NVDA-USDT-SWAP"
            },
            "aster": {
              "ask": 213.19,
              "bid": 213.17,
              "mid": 213.18,
              "mark": 213.1046,
              "index": 213.1046,
              "symbol": "NVDAUSDT"
            },
            "lighter": {
              "ask": 212.993,
              "bid": 212.972,
              "mid": 212.9825,
              "mark": 212.981,
              "symbol": "NVDA",
              "market_id": 110
            },
            "hyperliquid-xyz": {
              "ask": 212.85,
              "bid": 212.837,
              "mid": 212.845,
              "mark": 212.86,
              "oracle": 212.89,
              "symbol": "xyz:NVDA"
            }
          },
          "ticker": "NVDA",
          "tokens": {
            "ondo-gm": {
              "price": 213.2652,
              "status": "postmarket",
              "symbol": "NVDAon",
              "per_share": 212.9,
              "multiplier": 1.0017152487959897,
              "underlying_price": 212.837895
            },
            "xstocks-solana": {
              "mint": "Xsc9qvGR1efVDFGLrVsmkzv3qi45LTBjeUKSPmx9qEh",
              "price": 212.3166,
              "symbol": "NVDAx",
              "per_share": 212.3166,
              "multiplier": 1.0009180758490996,
              "liquidity_usd": 2852537
            }
          },
          "sources": [
            "hyperliquid"
          ],
          "summary": {
            "richest": "okx",
            "best_ask": {
              "px": 212.85,
              "venue": "hyperliquid-xyz"
            },
            "best_bid": {
              "px": 213.17,
              "venue": "aster"
            },
            "cheapest": "hyperliquid-xyz",
            "consensus_mid": 212.9413,
            "venues_quoted": 6,
            "cross_venue_arb_bps": 15,
            "consensus_vs_ref_pct": 0.029,
            "perp_mark_spread_pct": 0.141
          },
          "reference": {
            "ts": 1792705247,
            "kind": "after-hours_last",
            "age_s": 14,
            "price": 212.88,
            "source": "robinhood"
          },
          "last_close": {
            "date": "2026-10-22",
            "price": 212.21,
            "source": "yahoo",
            "ref_vs_close_pct": 0.316
          },
          "us_session": "after-hours"
        }
      }
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method"
          ],
          "properties": {
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "GET"
              ],
              "type": "string"
            },
            "queryParams": {
              "type": "object",
              "required": [
                "ticker"
              ],
              "properties": {
                "ticker": {
                  "type": "string",
                  "pattern": "^[A-Za-z0-9.]{1,12}$",
                  "examples": [
                    "NVDA"
                  ],
                  "description": "Stock ticker, case-insensitive (free list: GET /catalog)."
                },
                "tickers": {
                  "type": "string",
                  "pattern": "^[A-Za-z0-9.,]{1,130}$",
                  "examples": [
                    "NVDA,TSLA"
                  ],
                  "description": "Optional alternative to ticker: up to 10 comma-separated tickers."
                }
              },
              "additionalProperties": false
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object",
              "properties": {
                "as_of": {
                  "type": "string"
                },
                "perps": {
                  "type": "object"
                },
                "ticker": {
                  "type": "string"
                },
                "tokens": {
                  "type": "object"
                },
                "sources": {
                  "type": "array"
                },
                "summary": {
                  "type": "object"
                },
                "reference": {
                  "type": "object"
                },
                "last_close": {
                  "type": "object"
                },
                "us_session": {
                  "type": "string"
                }
              },
              "description": "Error responses are JSON {error: string, hint?: string}. 400 bad params (never charged); 402 payment required; 404 ticker/market not listed (checked before settlement, never charged); 502 upstream error. Full field docs: /openapi.json."
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog: 2026-10-23 07:13Z
Last indexed by Roundhouse: 2026-10-25 08:40Z
Last enriched (probe, favicon, geo): 2026-10-22 23:16Z
x402 version: 2
Max timeout: 120s
Liveness probe: HTTP 402

Report

Hand this page to an agent

Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.

GET api.roundhouseai.io/v0/endpoints

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 3 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.

Open skill.md

Show the prompt

Using Roundhouse, look up the x402 service Perp Gap API and tell me whether it is
worth paying: what a call costs, whether the endpoint answered when last probed, and what
its payment record actually shows.

curl -s 'https://api.roundhouseai.io/v0/endpoints?q=Perp%20Gap%20API'
curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>'

Then call it: read the price from the live 402 at https://perp-gap-api.perpgap.workers.dev/quote, never from
a cached figure, and pay with an x402 client.

The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except
/v0/unified* and /v0/endpoints. Either pay over x402 (mint a personal key for $0.01 at
GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at
https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further.

If you do not have Roundhouse tools or skills installed, read
https://roundhouseai.io/skill.md first — it is the whole procedure.