Api Endpoint

x402-solvers

Detect whether an arbitrage opportunity exists in a set of token exchange rates (multi-pool negative-cycle scan). Cheap boolean + magnitude signal for trading agents. POST a swap-rate graph, get back whether a profitable cycle exists and how large — without the path.

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Offering

Provider: x402-solvers.onrender.com
Method: POST
Offering type: Api Endpoint
Transport type: http
Category: Blockchain And Crypto
Delivery: Not provided
Pricing model: Not provided
x402 version: 2

Endpoint context

URL: https://x402-solvers.onrender.com/v1/cycles/probe
MIME type: Not provided
First seen: 2026-10-16T01:50:06.715Z
Last seen: 2026-11-05T17:18:49.312Z
Tags: DeFi, arbitrage, Trading, Signal

Website

Payment pricing

x402 payment terms are the authoritative price for calling this endpoint.

Payment option 1: 0.001 USDC
Atomic price: 1000 · Network: eip155:8453 · Asset: USDC · Scheme: exact

Raw x402 terms

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "1000",
    "payTo": "0xA238AF2e66D9d7301F2D02932931851DdF900Dcd"
  }
]

Observed health

Status: Healthy
Latest latency: 129 ms
Average latency: 491 ms
HTTP status: 200
Last checked: 2026-11-05T00:35:08.656Z
Reachability: 100% over 12 checks

Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.

Input schema

{
  "additionalProperties": false,
  "properties": {
    "body": {
      "properties": {
        "edges": {
          "description": "Directed exchange-rate edges describing a token swap graph. Supply the rates you observed; the server makes no RPC calls of its own.",
          "items": {
            "properties": {
              "dex": {
                "description": "Venue label; echoed back untouched.",
                "type": "string"
              },
              "fee": {
                "description": "Fractional swap fee, e.g. 0.003 for 0.30%. Defaults to 0.",
                "exclusiveMaximum": 1,
                "minimum": 0,
                "type": "number"
              },
              "from": {
                "description": "Source token symbol.",
                "type": "string"
              },
              "pool": {
                "description": "Pool address; echoed back untouched.",
                "type": "string"
              },
              "rate": {
                "description": "Units of `to` per 1 unit of `from`, BEFORE fees.",
                "exclusiveMinimum": 0,
                "type": "number"
              },
              "to": {
                "description": "Destination token symbol.",
                "type": "string"
              }
            },
            "required": [
              "from",
              "to",
              "rate"
            ],
            "type": "object"
          },
          "minItems": 1,
          "type": "array"
        }
      },
      "required": [
        "edges"
      ],
      "type": "object"
    },
    "bodyType": {
      "enum": [
        "json",
        "form-data",
        "text"
      ],
      "type": "string"
    },
    "method": {
      "enum": [
        "POST"
      ],
      "type": "string"
    },
    "type": {
      "const": "http",
      "type": "string"
    }
  },
  "required": [
    "type",
    "method",
    "bodyType",
    "body"
  ],
  "type": "object"
}

Output schema

{
  "properties": {
    "example": {
      "description": "Fast arbitrage-existence signal for a token swap graph: whether a profitable negative cycle exists and roughly how big, WITHOUT revealing the cycle path (that is the report tier).",
      "properties": {
        "edgesEvaluated": {
          "type": "number"
        },
        "hasArbitrage": {
          "description": "True if a profitable round-trip cycle exists.",
          "type": "boolean"
        },
        "hops": {
          "description": "Swaps in the detected cycle (0 if none).",
          "type": "number"
        },
        "nodesEvaluated": {
          "type": "number"
        },
        "profitBucket": {
          "description": "Coarse magnitude of the best cycle gross profit.",
          "enum": [
            "none",
            "<=0.1%",
            "0.1-0.5%",
            "0.5-2%",
            ">2%"
          ],
          "type": "string"
        },
        "tier": {
          "const": "probe"
        }
      },
      "type": "object"
    },
    "type": {
      "type": "string"
    }
  },
  "required": [
    "type"
  ],
  "type": "object"
}